earlephilhower · July 13, 2022 03:37
diff --git a/shortlog.txt b/shortlog.txt
 etharp_timer
 dhcp_fine_tmr(): request timeout
 dhcp_timeout()
 dhcp_timeout(): restarting discovery
 dhcp_discover()
 pbuf_alloc(length=308)
 pbuf_alloc(length=308) == 0x20022850
 transaction id xid(cc8552b1)
 dhcp_discover: making request
 dhcp_discover: sendto(DISCOVER, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER)
 pbuf_add_header: old 0x200228ac new 0x200228a4 (8)
 udp_send: added header in given pbuf 0x20022850
 udp_send: sending datagram of length 316
 udp_send: UDP packet length 316
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=6cdc
 udp_send: UDP checksum 0x9323
 udp_send: ip_output_if (,,,,0x11,)
 pbuf_add_header: old 0x200228a4 new 0x20022890 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       336     | (v, hl, tos, len)
 +-------------------------------+
 |        1      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |   17  |    0xba9c     | (ttl, proto, chksum)
 +-------------------------------+
 |    0  |    0  |    0  |    0  | (src)
 +-------------------------------+
 |  255  |  255  |  255  |  255  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022890 new 0x20022882 (14)
 ethernet_output: sending packet 0x20022850
 dhcp_discover: deleting()
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 dhcp_discover: SELECTING
 dhcp_discover(): set request timeout 4000 msecs
 etharp_timer
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 0
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: we are unconfigured, ARP request ignored.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 etharp_timer
 pbuf_alloc(length=215)
 pbuf_alloc(length=215) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x0 (0x0, 0x0, 0xffffffff)
 ip4_input: UDP packet to DHCP client port 7437
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=150)
 pbuf_alloc(length=150) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:38:2c:4a:90:fa:80, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xff01a8c0 netif->ip_addr 0x0 (0x0, 0x0, 0xff01a8c0)
 ip4_input: UDP packet to DHCP client port 7788
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x0 (0x0, 0x0, 0xffffffff)
 ip4_input: UDP packet to DHCP client port 3289
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:a8:57, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.34 - 7c:d3:0a:1f:a8:57
 etharp_find_entry: found empty entry 0
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: we are unconfigured, ARP request ignored.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 etharp_timer
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=79)
 pbuf_alloc(length=79) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x0 (0x0, 0x0, 0xffffffff)
 ip4_input: UDP packet to DHCP client port 1124
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=84)
 pbuf_alloc(length=84) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=84)
 pbuf_alloc(length=84) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=84)
 pbuf_alloc(length=84) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=84)
 pbuf_alloc(length=84) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=122)
 pbuf_alloc(length=122) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:9c:93:4e:7b:78:97, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 etharp_timer
 dhcp_fine_tmr(): request timeout
 dhcp_timeout()
 dhcp_timeout(): restarting discovery
 dhcp_discover()
 pbuf_alloc(length=308)
 pbuf_alloc(length=308) == 0x20022850
 transaction id xid(cc8552b1)
 dhcp_discover: making request
 dhcp_discover: sendto(DISCOVER, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER)
 pbuf_add_header: old 0x200228ac new 0x200228a4 (8)
 udp_send: added header in given pbuf 0x20022850
 udp_send: sending datagram of length 316
 udp_send: UDP packet length 316
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=6cdc
 udp_send: UDP checksum 0x9323
 udp_send: ip_output_if (,,,,0x11,)
 pbuf_add_header: old 0x200228a4 new 0x20022890 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       336     | (v, hl, tos, len)
 +-------------------------------+
 |        2      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |   17  |    0xba9b     | (ttl, proto, chksum)
 +-------------------------------+
 |    0  |    0  |    0  |    0  | (src)
 +-------------------------------+
 |  255  |  255  |  255  |  255  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022890 new 0x20022882 (14)
 ethernet_output: sending packet 0x20022850
 dhcp_discover: deleting()
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 dhcp_discover: SELECTING
 dhcp_discover(): set request timeout 8000 msecs
 pbuf_alloc(length=42)
 pbuf_alloc(length=42) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:9c:93:4e:7b:78:97, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.50 - 9c:93:4e:7b:78:97
 etharp_find_entry: found empty entry 0
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: we are unconfigured, ARP request ignored.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=342)
 pbuf_alloc(length=342) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:00:9f:27:e0:24:72, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x0 (0x0, 0x0, 0x8301a8c0)
 ip4_input: UDP packet to DHCP client port 68
 ip4_input: DHCP packet accepted.
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |       328     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  128  |   17  |    0xb5c0     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    1  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 328 p->tot_len 328
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 308
 UDP header:
 +-------------------------------+
 |        67     |        68     | (src port, dest port)
 +-------------------------------+
 |       308     |     0xa714    | (len, chksum)
 +-------------------------------+
 udp (192.168.1.131, 68) <-- (192.168.1.1, 67)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 udp_input: calculating checksum
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c59a (8)
 dhcp_recv(pbuf = 0x2000c560) from DHCP server 192.168.1.1 port 67
 pbuf->len = 300
 pbuf->tot_len = 300
 searching DHCP_OPTION_MESSAGE_TYPE
 DHCP_OFFER received in DHCP_STATE_SELECTING state
 dhcp_handle_offer(netif=0x20001118) e00
 dhcp_handle_offer(): server 0x0101a8c0
 dhcp_handle_offer(): offer for 0x8301a8c0
 dhcp_select(netif=0x20001118) e00
 pbuf_alloc(length=308)
 pbuf_alloc(length=308) == 0x20022850
 transaction id xid(cc8552b1)
 pbuf_add_header: old 0x200228ac new 0x200228a4 (8)
 udp_send: added header in given pbuf 0x20022850
 udp_send: sending datagram of length 316
 udp_send: UDP packet length 316
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=6fcd
 udp_send: UDP checksum 0x9032
 udp_send: ip_output_if (,,,,0x11,)
 pbuf_add_header: old 0x200228a4 new 0x20022890 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       336     | (v, hl, tos, len)
 +-------------------------------+
 |        3      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |   17  |    0xba9a     | (ttl, proto, chksum)
 +-------------------------------+
 |    0  |    0  |    0  |    0  | (src)
 +-------------------------------+
 |  255  |  255  |  255  |  255  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022890 new 0x20022882 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 dhcp_select: REQUESTING
 dhcp_select(): set request timeout 2000 msecs
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=342)
 pbuf_alloc(length=342) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:00:9f:27:e0:24:72, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x0 (0x0, 0x0, 0x8301a8c0)
 ip4_input: UDP packet to DHCP client port 68
 ip4_input: DHCP packet accepted.
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |       328     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  128  |   17  |    0xb5c0     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    1  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 328 p->tot_len 328
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 308
 UDP header:
 +-------------------------------+
 |        67     |        68     | (src port, dest port)
 +-------------------------------+
 |       308     |     0xa414    | (len, chksum)
 +-------------------------------+
 udp (192.168.1.131, 68) <-- (192.168.1.1, 67)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 udp_input: calculating checksum
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c59a (8)
 dhcp_recv(pbuf = 0x2000c560) from DHCP server 192.168.1.1 port 67
 pbuf->len = 300
 pbuf->tot_len = 300
 searching DHCP_OPTION_MESSAGE_TYPE
 DHCP_ACK received
 dhcp_bind(netif=0x20001118) e00
 dhcp_bind(): t0 renewal timer 6305 secs
 dhcp_bind(): set request timeout 6305000 msecs
 dhcp_bind(): t1 renewal timer 3152 secs
 dhcp_bind(): set request timeout 3152000 msecs
 dhcp_bind(): t2 rebind timer 5516 secs
 dhcp_bind(): set request timeout 5516000 msecs
 dhcp_bind(): IP: 0x8301a8c0 SN: 0x00ffffff GW: 0x0101a8c0
 netif: netmask of interface e0 set to 255.255.255.0
 netif: GW address of interface e0 set to 192.168.1.1
 netif_set_ipaddr: netif address being changed
 etharp_request: sending ARP request.
 pbuf_alloc(length=28)
 pbuf_alloc(length=28) == 0x20022850
 etharp_raw: sending raw ARP packet.
 pbuf_add_header: old 0x20022870 new 0x20022862 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 netif: setting default interface e0
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 192.168.1.131
 tcp_bind: bind to port 3000
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=146)
 pbuf_alloc(length=146) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:c4:2f:90:7c:68:84, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=215)
 pbuf_alloc(length=215) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x8301a8c0 (0xffffff, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       201     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0x7819     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   99  | (src)
 +-------------------------------+
 |  255  |  255  |  255  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 201 p->tot_len 201
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 181
 UDP header:
 +-------------------------------+
 |     56243     |      7437     | (src port, dest port)
 +-------------------------------+
 |       181     |     0xf0a4    | (len, chksum)
 +-------------------------------+
 udp (255.255.255.255, 7437) <-- (192.168.1.99, 56243)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 0
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=87)
 pbuf_alloc(length=87) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=103)
 pbuf_alloc(length=103) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:2c:4c:c6:d5:45:74, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 0
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=150)
 pbuf_alloc(length=150) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:38:2c:4a:90:fa:80, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xff01a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       136     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0xb5b4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   97  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 136 p->tot_len 136
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 116
 UDP header:
 +-------------------------------+
 |     35589     |      7788     | (src port, dest port)
 +-------------------------------+
 |       116     |     0x9a93    | (len, chksum)
 +-------------------------------+
 udp (192.168.1.255, 7788) <-- (192.168.1.97, 35589)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=150)
 pbuf_alloc(length=150) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:38:2c:4a:90:fa:80, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xff01a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       136     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0xb5b4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   97  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 136 p->tot_len 136
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 116
 UDP header:
 +-------------------------------+
 |     48004     |      7788     | (src port, dest port)
 +-------------------------------+
 |       116     |     0xba8a    | (len, chksum)
 +-------------------------------+
 udp (192.168.1.255, 7788) <-- (192.168.1.97, 48004)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 0
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=215)
 pbuf_alloc(length=215) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x8301a8c0 (0xffffff, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       201     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0x7819     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   99  | (src)
 +-------------------------------+
 |  255  |  255  |  255  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 201 p->tot_len 201
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 181
 UDP header:
 +-------------------------------+
 |     56243     |      7437     | (src port, dest port)
 +-------------------------------+
 |       181     |     0xf0a4    | (len, chksum)
 +-------------------------------+
 udp (255.255.255.255, 7437) <-- (192.168.1.99, 56243)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=74)
 pbuf_alloc(length=74) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        60     | (v, hl, tos, len)
 +-------------------------------+
 |    21374      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x6352     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 60 p->tot_len 60
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510358          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 | 10 |   |000010|     64240     | (hdrlen, flags (SYN 
 ), win)
 +-------------------------------+
 |    0x888e     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5ba (40)
 tcp_input: packed for LISTENing connection.
 TCP connection request 38056 -> 3000.
 memp_malloc: out of memory in pool SYS_TIMEOUT
 tcp_parseopt: MSS
 tcp_parseopt: other
 tcp_parseopt: other
 tcp_parseopt: NOP
 tcp_parseopt: other
 tcp_enqueue_flags: queuelen: 0
 pbuf_alloc(length=4)
 pbuf_alloc(length=4) == 0x20022850
 pbuf_add_header: old 0x200228ac new 0x20022898 (20)
 tcp_enqueue_flags: queueing 6510:6511 (0x12)
 tcp_enqueue_flags: 1 (after enqueued)
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=759
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |        4      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37ec     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 etharp_find_entry: found empty entry 0
 etharp_find_entry: selecting empty entry 0
 etharp_request: sending ARP request.
 pbuf_alloc(length=28)
 pbuf_alloc(length=28) == 0x200228b8
 etharp_raw: sending raw ARP packet.
 pbuf_add_header: old 0x200228d8 new 0x200228ca (14)
 ethernet_output: sending packet 0x200228b8
 pbuf_free(0x200228b8)
 pbuf_free: deallocating 0x200228b8
 etharp_query: queued packet 0x20022850 on ARP entry 0
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.8 - 18:c0:4d:8d:07:cc
 etharp_find_entry: found matching entry 0
 etharp_update_arp_entry: updating stable entry 0
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x20022850)
 pbuf_free: 0x20022850 has ref 1, ending here.
 etharp_input: incoming ARP reply
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    21375      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x6365     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510359          | (seq no)
 +-------------------------------+
 |           0000006511          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64240     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0xf164     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 TCP connection established 38056 -> 3000.
 WS:ac
 tcp_receive: window update 64240
 tcp_receive: slow start cwnd 2
 tcp_receive: ACK for 6511, unacked->seqno 6510:6511
 tcp_receive: removing 6510:6511 from pcb->unacked
 tcp_receive: queuelen 1 ... pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 0 (after freeing unacked)
 tcp_receive: pcb->rttest 0 rtseq 6510 ackno 6511
 tcp_process (SYN_RCVD): cwnd 4380 ssthresh 11680
 tcp_output: nothing to send (0)
 tcp_output: snd_wnd 64240, cwnd 4380, wnd 4380, seg == NULL, ack 6511
 State: ESTABLISHED
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 :ref 1
 WS:av status=4 WCav=0
 :ref 2
 :ur 2
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:c4:2f:90:7c:68:84, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.23 - c4:2f:90:7c:68:84
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 etharp_timer
 pbuf_alloc(length=61)
 pbuf_alloc(length=61) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        47     | (v, hl, tos, len)
 +-------------------------------+
 |    21376      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x635d     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 47 p->tot_len 47
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510359          | (seq no)
 +-------------------------------+
 |           0000006511          | (ack no)
 +-------------------------------+
 |  5 |   |011000|     64240     | (hdrlen, flags (PSH ACK 
 ), win)
 +-------------------------------+
 |    0xa96e     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags PSH ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: ESTABLISHED
 tcp_receive: pcb->rttest 0 rtseq 6510 ackno 6511
 :rn 7
 tcp_output: nothing to send (0)
 tcp_output: snd_wnd 64240, cwnd 4380, wnd 4380, seg == NULL, ack 6511
 State: ESTABLISHED
 tcp_recved: received 1 bytes, wnd 11674 (6).
 tcp_recved: received 1 bytes, wnd 11675 (5).
 tcp_recved: received 1 bytes, wnd 11676 (4).
 tcp_recved: received 1 bytes, wnd 11677 (3).
 tcp_recved: received 1 bytes, wnd 11678 (2).
 tcp_recved: received 1 bytes, wnd 11679 (1).
 :c0 1, 7
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 tcp_recved: received 1 bytes, wnd 11680 (0).
 fsdfs

 :wr 6 0
 tcp_write(pcb=0x2001e5fc, data=0x20041f50, len=6, apiflags=1)
 tcp_write: queuelen: 0
 pbuf_alloc(length=1460)
 pbuf_alloc(length=1460) == 0x20022850
 pbuf_add_header: old 0x200228ac new 0x20022898 (20)
 tcp_write: queueing 6511:6517
 tcp_write: 1 (after enqueued)
 :wrc 6 6 0
 tcp_output: snd_wnd 64240, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511
 tcp_output: snd_wnd 64240, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511, i 0
 tcp_output_segment: rtseq 6511
 tcp_output_segment: 6511:6517
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=3485
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
 +-------------------------------+
 |        5      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e9     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 :ur 1
 :dsrcv 0
 :close
 tcp_close: closing in State: ESTABLISHED
 tcp_output: snd_wnd 64240, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511
 tcp_output: snd_wnd 64240, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511, i 0
 tcp_output_segment: rtseq 6511
 tcp_output_segment: 6511:6517
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=3585
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
 +-------------------------------+
 |        6      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e8     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 WS:dis
 :del
 --loop
 --loop
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    21377      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x6363     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510366          | (seq no)
 +-------------------------------+
 |           0000006517          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64234     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0xf15d     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: FIN_WAIT_1
 tcp_receive: window update 64234
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x20022e68
 tcp_output: sending ACK for 2520510366
 inet_chksum_pseudo(): checksumming pbuf 0x20022e68 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=4a41
 pbuf_add_header: old 0x20022eb0 new 0x20022e9c (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        7      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37ed     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022e9c new 0x20022e8e (14)
 ethernet_output: sending packet 0x20022e68
 pbuf_free(0x20022e68)
 pbuf_free: deallocating 0x20022e68
 tcp_receive: pcb->rttest 0 rtseq 6511 ackno 6517
 tcp_output: snd_wnd 64234, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511
 tcp_output: snd_wnd 64234, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511, i 0
 tcp_output_segment: rtseq 6511
 tcp_output_segment: 6511:6517
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=3585
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
 +-------------------------------+
 |        8      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e6     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: FIN_WAIT_1
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    21378      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x6362     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510366          | (seq no)
 +-------------------------------+
 |           0000006518          | (ack no)
 +-------------------------------+
 |  5 |   |010001|     64233     | (hdrlen, flags (FIN ACK 
 ), win)
 +-------------------------------+
 |    0xf15c     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags FIN ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: FIN_WAIT_1
 tcp_receive: window update 64233
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x20022e68
 tcp_output: sending ACK for 2520510366
 inet_chksum_pseudo(): checksumming pbuf 0x20022e68 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=4a41
 pbuf_add_header: old 0x20022eb0 new 0x20022e9c (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        9      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37eb     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022e9c new 0x20022e8e (14)
 ethernet_output: sending packet 0x20022e68
 pbuf_free(0x20022e68)
 pbuf_free: deallocating 0x20022e68
 tcp_receive: pcb->rttest 0 rtseq 6511 ackno 6518
 tcp_receive: received FIN.
 tcp_output: snd_wnd 64233, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511
 tcp_output: snd_wnd 64233, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511, i 0
 tcp_output_segment: rtseq 6511
 tcp_output_segment: 6511:6517
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=3585
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
 +-------------------------------+
 |       10      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: CLOSING
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    21379      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x6361     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510367          | (seq no)
 +-------------------------------+
 |           0000006518          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64233     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0xf15c     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: CLOSING
 tcp_receive: window update 64233
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x20022e68
 tcp_output: sending ACK for 2520510367
 inet_chksum_pseudo(): checksumming pbuf 0x20022e68 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=4a41
 pbuf_add_header: old 0x20022eb0 new 0x20022e9c (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |       11      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e9     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022e9c new 0x20022e8e (14)
 ethernet_output: sending packet 0x20022e68
 pbuf_free(0x20022e68)
 pbuf_free: deallocating 0x20022e68
 tcp_receive: pcb->rttest 0 rtseq 6511 ackno 6518
 tcp_output: snd_wnd 64233, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511
 tcp_output: snd_wnd 64233, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511, i 0
 tcp_output_segment: rtseq 6511
 tcp_output_segment: 6511:6517
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=3585
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
 +-------------------------------+
 |       12      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e2     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: CLOSING
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    21380      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x6360     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510367          | (seq no)
 +-------------------------------+
 |           0000006518          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64233     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0xf15c     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: CLOSING
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x20022e68
 tcp_output: sending ACK for 2520510367
 inet_chksum_pseudo(): checksumming pbuf 0x20022e68 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=4a41
 pbuf_add_header: old 0x20022eb0 new 0x20022e9c (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |       13      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e7     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022e9c new 0x20022e8e (14)
 ethernet_output: sending packet 0x20022e68
 pbuf_free(0x20022e68)
 pbuf_free: deallocating 0x20022e68
 tcp_receive: pcb->rttest 0 rtseq 6511 ackno 6518
 tcp_output: snd_wnd 64233, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511
 tcp_output: snd_wnd 64233, cwnd 4380, wnd 4380, effwnd 6, seq 6511, ack 6511, i 0
 tcp_output_segment: rtseq 6511
 tcp_output_segment: 6511:6517
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=3585
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        46     | (v, hl, tos, len)
 +-------------------------------+
 |       14      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e0     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: CLOSING
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510367          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0x05c9     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags RST 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: CLOSING
 tcp_process: Connection RESET
 tcp_pcb_purge
 tcp_pcb_purge: not all data sent
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510367          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0x05c9     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 tcp_input: packed for LISTENing connection.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510367          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0x05c9     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 tcp_input: packed for LISTENing connection.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38056      |     3000      | (src port, dest port)
 +-------------------------------+
 |           2520510367          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0x05c9     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 tcp_input: packed for LISTENing connection.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=215)
 pbuf_alloc(length=215) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x8301a8c0 (0xffffff, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       201     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0x7819     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   99  | (src)
 +-------------------------------+
 |  255  |  255  |  255  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 201 p->tot_len 201
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 181
 UDP header:
 +-------------------------------+
 |     56243     |      7437     | (src port, dest port)
 +-------------------------------+
 |       181     |     0xf0a4    | (len, chksum)
 +-------------------------------+
 udp (255.255.255.255, 7437) <-- (192.168.1.99, 56243)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=87)
 pbuf_alloc(length=87) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:a8:57, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.34 - 7c:d3:0a:1f:a8:57
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:a8:57, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.34 - 7c:d3:0a:1f:a8:57
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=42)
 pbuf_alloc(length=42) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:9c:93:4e:7b:78:97, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.50 - 9c:93:4e:7b:78:97
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=46)
 pbuf_alloc(length=46) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:9c:93:4e:7b:78:97, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=150)
 pbuf_alloc(length=150) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:38:2c:4a:90:fa:80, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xff01a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       136     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0xb5b4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   97  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 136 p->tot_len 136
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 116
 UDP header:
 +-------------------------------+
 |     43486     |      7788     | (src port, dest port)
 +-------------------------------+
 |       116     |     0x0971    | (len, chksum)
 +-------------------------------+
 udp (192.168.1.255, 7788) <-- (192.168.1.97, 43486)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=74)
 pbuf_alloc(length=74) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        60     | (v, hl, tos, len)
 +-------------------------------+
 |     7535      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x9961     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 60 p->tot_len 60
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38058      |     3000      | (src port, dest port)
 +-------------------------------+
 |           0733807167          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 | 10 |   |000010|     64240     | (hdrlen, flags (SYN 
 ), win)
 +-------------------------------+
 |    0xd5a1     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5ba (40)
 tcp_input: packed for LISTENing connection.
 TCP connection request 38058 -> 3000.
 tcp_parseopt: MSS
 tcp_parseopt: other
 tcp_parseopt: other
 tcp_parseopt: NOP
 tcp_parseopt: other
 tcp_enqueue_flags: queuelen: 0
 pbuf_alloc(length=4)
 pbuf_alloc(length=4) == 0x20022850
 pbuf_add_header: old 0x200228ac new 0x20022898 (20)
 tcp_enqueue_flags: queueing 6510:6511 (0x12)
 tcp_enqueue_flags: 1 (after enqueued)
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=3301
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       15      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e1     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |     7536      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x9974     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38058      |     3000      | (src port, dest port)
 +-------------------------------+
 |           0733807168          | (seq no)
 +-------------------------------+
 |           0000006511          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64240     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0x4939     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x200228b8
 tcp_rst: seqno 6511 ackno 733807168.
 inet_chksum_pseudo(): checksumming pbuf 0x200228b8 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=75c
 pbuf_add_header: old 0x20022900 new 0x200228ec (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |       16      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x200228ec new 0x200228de (14)
 ethernet_output: sending packet 0x200228b8
 pbuf_free(0x200228b8)
 pbuf_free: deallocating 0x200228b8
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=3301
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       17      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37df     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: SYN_RCVD
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38058      |     3000      | (src port, dest port)
 +-------------------------------+
 |           0733807168          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0x5da5     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags RST 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 tcp_process: Connection RESET
 tcp_pcb_purge
 tcp_pcb_purge: not all data sent
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=46)
 pbuf_alloc(length=46) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:9c:93:4e:7b:78:97, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:a8:57, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.34 - 7c:d3:0a:1f:a8:57
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=74)
 pbuf_alloc(length=74) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        60     | (v, hl, tos, len)
 +-------------------------------+
 |    64895      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb950     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 60 p->tot_len 60
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38060      |     3000      | (src port, dest port)
 +-------------------------------+
 |           4096604072          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 | 10 |   |000010|     64240     | (hdrlen, flags (SYN 
 ), win)
 +-------------------------------+
 |    0xd27b     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5ba (40)
 tcp_input: packed for LISTENing connection.
 TCP connection request 38060 -> 3000.
 tcp_parseopt: MSS
 tcp_parseopt: other
 tcp_parseopt: other
 tcp_parseopt: NOP
 tcp_parseopt: other
 tcp_enqueue_flags: queuelen: 0
 pbuf_alloc(length=4)
 pbuf_alloc(length=4) == 0x20022850
 pbuf_add_header: old 0x200228ac new 0x20022898 (20)
 tcp_enqueue_flags: queueing 6510:6511 (0x12)
 tcp_enqueue_flags: 1 (after enqueued)
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=eff
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       18      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37de     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    64896      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb963     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38060      |     3000      | (src port, dest port)
 +-------------------------------+
 |           4096604073          | (seq no)
 +-------------------------------+
 |           0000006511          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64240     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0x4b5d     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x200228b8
 tcp_rst: seqno 6511 ackno 4096604073.
 inet_chksum_pseudo(): checksumming pbuf 0x200228b8 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=e359
 pbuf_add_header: old 0x20022900 new 0x200228ec (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |       19      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37e1     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x200228ec new 0x200228de (14)
 ethernet_output: sending packet 0x200228b8
 pbuf_free(0x200228b8)
 pbuf_free: deallocating 0x200228b8
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=eff
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       20      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37dc     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: SYN_RCVD
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38060      |     3000      | (src port, dest port)
 +-------------------------------+
 |           4096604073          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0x5fc9     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags RST 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 tcp_process: Connection RESET
 tcp_pcb_purge
 tcp_pcb_purge: not all data sent
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=84)
 pbuf_alloc(length=84) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=84)
 pbuf_alloc(length=84) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=84)
 pbuf_alloc(length=84) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=84)
 pbuf_alloc(length=84) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=85)
 pbuf_alloc(length=85) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=74)
 pbuf_alloc(length=74) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        60     | (v, hl, tos, len)
 +-------------------------------+
 |    52177      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xeafe     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 60 p->tot_len 60
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38062      |     3000      | (src port, dest port)
 +-------------------------------+
 |           0104965077          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 | 10 |   |000010|     64240     | (hdrlen, flags (SYN 
 ), win)
 +-------------------------------+
 |    0x5195     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5ba (40)
 tcp_input: packed for LISTENing connection.
 TCP connection request 38062 -> 3000.
 tcp_parseopt: MSS
 tcp_parseopt: other
 tcp_parseopt: other
 tcp_parseopt: NOP
 tcp_parseopt: other
 tcp_enqueue_flags: queuelen: 0
 pbuf_alloc(length=4)
 pbuf_alloc(length=4) == 0x20022850
 pbuf_add_header: old 0x200228ac new 0x20022898 (20)
 tcp_enqueue_flags: queueing 6510:6511 (0x12)
 tcp_enqueue_flags: 1 (after enqueued)
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=517d
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       21      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37db     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    52178      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xeb11     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38062      |     3000      | (src port, dest port)
 +-------------------------------+
 |           0104965078          | (seq no)
 +-------------------------------+
 |           0000006511          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64240     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0xcd1a     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x200228b8
 tcp_rst: seqno 6511 ackno 104965078.
 inet_chksum_pseudo(): checksumming pbuf 0x200228b8 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=25d8
 pbuf_add_header: old 0x20022900 new 0x200228ec (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |       22      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37de     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x200228ec new 0x200228de (14)
 ethernet_output: sending packet 0x200228b8
 pbuf_free(0x200228b8)
 pbuf_free: deallocating 0x200228b8
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=517d
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       23      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d9     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: SYN_RCVD
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38062      |     3000      | (src port, dest port)
 +-------------------------------+
 |           0104965078          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0xe186     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags RST 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 tcp_process: Connection RESET
 tcp_pcb_purge
 tcp_pcb_purge: not all data sent
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=215)
 pbuf_alloc(length=215) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x8301a8c0 (0xffffff, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       201     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0x7819     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   99  | (src)
 +-------------------------------+
 |  255  |  255  |  255  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 201 p->tot_len 201
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 181
 UDP header:
 +-------------------------------+
 |     56243     |      7437     | (src port, dest port)
 +-------------------------------+
 |       181     |     0xf0a4    | (len, chksum)
 +-------------------------------+
 udp (255.255.255.255, 7437) <-- (192.168.1.99, 56243)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=74)
 pbuf_alloc(length=74) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        60     | (v, hl, tos, len)
 +-------------------------------+
 |    37072      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x2600     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 60 p->tot_len 60
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38064      |     3000      | (src port, dest port)
 +-------------------------------+
 |           3775786836          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 | 10 |   |000010|     64240     | (hdrlen, flags (SYN 
 ), win)
 +-------------------------------+
 |    0x2a25     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5ba (40)
 tcp_input: packed for LISTENing connection.
 TCP connection request 38064 -> 3000.
 tcp_parseopt: MSS
 tcp_parseopt: other
 tcp_parseopt: other
 tcp_parseopt: NOP
 tcp_parseopt: other
 tcp_enqueue_flags: queuelen: 0
 pbuf_alloc(length=4)
 pbuf_alloc(length=4) == 0x20022850
 pbuf_add_header: old 0x200228ac new 0x20022898 (20)
 tcp_enqueue_flags: queueing 6510:6511 (0x12)
 tcp_enqueue_flags: 1 (after enqueued)
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=9fa3
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       24      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d8     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    37073      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x2613     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38064      |     3000      | (src port, dest port)
 +-------------------------------+
 |           3775786837          | (seq no)
 +-------------------------------+
 |           0000006511          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64240     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0xa6cc     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x200228b8
 tcp_rst: seqno 6511 ackno 3775786837.
 inet_chksum_pseudo(): checksumming pbuf 0x200228b8 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=73fe
 pbuf_add_header: old 0x20022900 new 0x200228ec (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |       25      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37db     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x200228ec new 0x200228de (14)
 ethernet_output: sending packet 0x200228b8
 pbuf_free(0x200228b8)
 pbuf_free: deallocating 0x200228b8
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=9fa3
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       26      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d6     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: SYN_RCVD
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38064      |     3000      | (src port, dest port)
 +-------------------------------+
 |           3775786837          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0xbb38     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags RST 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 tcp_process: Connection RESET
 tcp_pcb_purge
 tcp_pcb_purge: not all data sent
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=74)
 pbuf_alloc(length=74) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        60     | (v, hl, tos, len)
 +-------------------------------+
 |    43653      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x0c4b     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 60 p->tot_len 60
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38066      |     3000      | (src port, dest port)
 +-------------------------------+
 |           3425682484          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 | 10 |   |000010|     64240     | (hdrlen, flags (SYN 
 ), win)
 +-------------------------------+
 |    0x692e     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5ba (40)
 tcp_input: packed for LISTENing connection.
 TCP connection request 38066 -> 3000.
 tcp_parseopt: MSS
 tcp_parseopt: other
 tcp_parseopt: other
 tcp_parseopt: NOP
 tcp_parseopt: other
 tcp_enqueue_flags: queuelen: 0
 pbuf_alloc(length=4)
 pbuf_alloc(length=4) == 0x20022850
 pbuf_add_header: old 0x200228ac new 0x20022898 (20)
 tcp_enqueue_flags: queueing 6510:6511 (0x12)
 tcp_enqueue_flags: 1 (after enqueued)
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=a363
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       27      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d5     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    43654      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x0c5e     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38066      |     3000      | (src port, dest port)
 +-------------------------------+
 |           3425682485          | (seq no)
 +-------------------------------+
 |           0000006511          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64240     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0xe6c8     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x200228b8
 tcp_rst: seqno 6511 ackno 3425682485.
 inet_chksum_pseudo(): checksumming pbuf 0x200228b8 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=77be
 pbuf_add_header: old 0x20022900 new 0x200228ec (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |       28      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d8     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x200228ec new 0x200228de (14)
 ethernet_output: sending packet 0x200228b8
 pbuf_free(0x200228b8)
 pbuf_free: deallocating 0x200228b8
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=a363
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       29      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d3     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: SYN_RCVD
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38066      |     3000      | (src port, dest port)
 +-------------------------------+
 |           3425682485          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0xfb34     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags RST 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 tcp_process: Connection RESET
 tcp_pcb_purge
 tcp_pcb_purge: not all data sent
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=74)
 pbuf_alloc(length=74) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        60     | (v, hl, tos, len)
 +-------------------------------+
 |    28795      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x4655     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 60 p->tot_len 60
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38068      |     3000      | (src port, dest port)
 +-------------------------------+
 |           1750132914          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 | 10 |   |000010|     64240     | (hdrlen, flags (SYN 
 ), win)
 +-------------------------------+
 |    0xa7b7     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5ba (40)
 tcp_input: packed for LISTENing connection.
 TCP connection request 38068 -> 3000.
 tcp_parseopt: MSS
 tcp_parseopt: other
 tcp_parseopt: other
 tcp_parseopt: NOP
 tcp_parseopt: other
 tcp_enqueue_flags: queuelen: 0
 pbuf_alloc(length=4)
 pbuf_alloc(length=4) == 0x20022850
 pbuf_add_header: old 0x200228ac new 0x20022898 (20)
 tcp_enqueue_flags: queueing 6510:6511 (0x12)
 tcp_enqueue_flags: 1 (after enqueued)
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=4424
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       30      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d2     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x10 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |    28796      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0x4668     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38068      |     3000      | (src port, dest port)
 +-------------------------------+
 |           1750132915          | (seq no)
 +-------------------------------+
 |           0000006511          | (ack no)
 +-------------------------------+
 |  5 |   |010000|     64240     | (hdrlen, flags (ACK 
 ), win)
 +-------------------------------+
 |    0x2628     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 pbuf_alloc(length=20)
 pbuf_alloc(length=20) == 0x200228b8
 tcp_rst: seqno 6511 ackno 1750132915.
 inet_chksum_pseudo(): checksumming pbuf 0x200228b8 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=187f
 pbuf_add_header: old 0x20022900 new 0x200228ec (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |       31      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d5     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x200228ec new 0x200228de (14)
 ethernet_output: sending packet 0x200228b8
 pbuf_free(0x200228b8)
 pbuf_free: deallocating 0x200228b8
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
 tcp_output: snd_wnd 64240, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
 tcp_output_segment: rtseq 6510
 tcp_output_segment: 6510:6510
 inet_chksum_pseudo(): checksumming pbuf 0x20022850 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=4424
 pbuf_add_header: old 0x20022898 new 0x20022884 (20)
 ip4_output_if: e00
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
 +-------------------------------+
 |       32      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  255  |    6  |    0x37d0     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (dest)
 +-------------------------------+
 ip4_output_if: call netif->output()
 pbuf_add_header: old 0x20022884 new 0x20022876 (14)
 ethernet_output: sending packet 0x20022850
 State: SYN_RCVD
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:28:cd:c1:00:ef:dd, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0x8301a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0x83000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |    6  |    0xb6f4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |    8  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  131  | (dest)
 +-------------------------------+
 ip4_input: p->len 40 p->tot_len 40
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 TCP header:
 +-------------------------------+
 |    38068      |     3000      | (src port, dest port)
 +-------------------------------+
 |           1750132915          | (seq no)
 +-------------------------------+
 |           0000000000          | (ack no)
 +-------------------------------+
 |  5 |   |000100|         0     | (hdrlen, flags (RST 
 ), win)
 +-------------------------------+
 |    0x3a94     |         0     | (chksum, urgp)
 +-------------------------------+
 inet_chksum_pseudo(): checksumming pbuf 0x2000c560 (has next 0) 
 inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
 pbuf_remove_header: old 0x2000c592 new 0x2000c5a6 (20)
 +-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags RST 
 -+-+-+-+-+-+-+-+-+-+-+-+-+-+
 State: SYN_RCVD
 tcp_process: Connection RESET
 tcp_pcb_purge
 tcp_pcb_purge: not all data sent
 pbuf_free(0x20022850)
 pbuf_free: deallocating 0x20022850
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=87)
 pbuf_alloc(length=87) == 0x2000c560
 ethernet_input: dest:01:00:5e:00:00:fb, src:18:c0:4d:8d:07:cc, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip4_input: UDP packet to DHCP client port 5353
 ip4_input: packet not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 pbuf_alloc(length=86)
 pbuf_alloc(length=86) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:94:e7:0b:33:c9:2b, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xff01a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |        72     | (v, hl, tos, len)
 +-------------------------------+
 |    48510      |000|       0   | (id, flags, offset)
 +-------------------------------+
 |  128  |   17  |    0xf83f     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |  151  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 72 p->tot_len 72
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 52
 UDP header:
 +-------------------------------+
 |     57621     |     57621     | (src port, dest port)
 +-------------------------------+
 |        52     |     0x464b    | (len, chksum)
 +-------------------------------+
 udp (192.168.1.255, 57621) <-- (192.168.1.151, 57621)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=150)
 pbuf_alloc(length=150) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:38:2c:4a:90:fa:80, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xff01a8c0 netif->ip_addr 0x8301a8c0 (0x1a8c0, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       136     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0xb5b4     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   97  | (src)
 +-------------------------------+
 |  192  |  168  |    1  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 136 p->tot_len 136
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 116
 UDP header:
 +-------------------------------+
 |     59351     |      7788     | (src port, dest port)
 +-------------------------------+
 |       116     |     0xd274    | (len, chksum)
 +-------------------------------+
 udp (192.168.1.255, 7788) <-- (192.168.1.97, 59351)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=215)
 pbuf_alloc(length=215) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:ac:84:c6:6c:ef:f4, type:800
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x8301a8c0 (0xffffff, 0x1a8c0, 0xff000000)
 ip4_input: packet accepted on interface e0
 ip4_input: 
 IP header:
 +-------------------------------+
 | 4 | 5 |  0x00 |       201     | (v, hl, tos, len)
 +-------------------------------+
 |        0      |010|       0   | (id, flags, offset)
 +-------------------------------+
 |   64  |   17  |    0x7819     | (ttl, proto, chksum)
 +-------------------------------+
 |  192  |  168  |    1  |   99  | (src)
 +-------------------------------+
 |  255  |  255  |  255  |  255  | (dest)
 +-------------------------------+
 ip4_input: p->len 201 p->tot_len 201
 pbuf_remove_header: old 0x2000c57e new 0x2000c592 (20)
 udp_input: received datagram of length 181
 UDP header:
 +-------------------------------+
 |     56243     |      7437     | (src port, dest port)
 +-------------------------------+
 |       181     |     0xf0a4    | (len, chksum)
 +-------------------------------+
 udp (255.255.255.255, 7437) <-- (192.168.1.99, 56243)
 pcb (0.0.0.0, 68) <-- (0.0.0.0, 67)
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 etharp_timer
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 pbuf_alloc(length=60)
 pbuf_alloc(length=60) == 0x2000c560
 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:7c:d3:0a:1f:f8:5a, type:806
 pbuf_remove_header: old 0x2000c570 new 0x2000c57e (14)
 etharp_update_arp_entry: 192.168.1.49 - 7c:d3:0a:1f:f8:5a
 etharp_find_entry: found empty entry 1
 etharp_find_entry: no empty entry found and not allowed to recycle
 etharp_input: incoming ARP request
 etharp_input: ARP request was not for us.
 pbuf_free(0x2000c560)
 pbuf_free: deallocating 0x2000c560
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop
 --loop