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Receiver MAC level packets from network
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#include <stdio.h> | |
#include <stdlib.h> | |
#include <stdint.h> | |
#include <errno.h> | |
#include <string.h> | |
#include <inttypes.h> | |
#include <linux/if_packet.h> | |
#include <linux/if_ether.h> | |
// #include <netpacket/packet.h> | |
#include <arpa/inet.h> | |
#include <net/if.h> | |
#include <net/ethernet.h> | |
#include <sys/socket.h> | |
#define BUF_SIZE 1024*1024 //3221225472ULL // 3GB | |
int main(int argc, const char **argv) { | |
int s, bound, ifindex; | |
uint64_t i, j, wr_offset; | |
//uint8_t *buf; | |
void *buf; | |
ssize_t nbytes; | |
struct sockaddr_ll addr; | |
socklen_t len; | |
if (argc < 2) { | |
fprintf(stderr, "Укажите имя сетевого интерфейса для прослушивания (например, eth0)\n"); | |
exit(EXIT_FAILURE); | |
} | |
ifindex = if_nametoindex(argv[1]); | |
if (ifindex == 0) { | |
fprintf(stderr, "Не найден сетевой интерфейс %s\n", argv[1]); | |
exit(EXIT_FAILURE); | |
} | |
// s = socket(AF_PACKET,SOCK_RAW,0xAAAA); | |
s = socket(AF_PACKET,SOCK_RAW,htons(ETH_P_ALL)); | |
//s = socket(AF_PACKET,SOCK_DGRAM,0); | |
//s = socket(AF_PACKET,SOCK_RDM,0); | |
if (s == -1) { | |
perror("Ошибка при создании сокета"); | |
exit(EXIT_FAILURE); | |
} | |
/*len = sizeof(addr); | |
getsockname(s, (struct sockaddr *) &addr, &len); | |
printf("%X\n", addr.sll_family); | |
printf("%X\n", addr.sll_protocol); | |
printf("%X\n", addr.sll_ifindex); | |
printf("%X\n", addr.sll_hatype); | |
printf("%X\n", addr.sll_pkttype); | |
printf("%X\n", addr.sll_halen); | |
printf("%s\n", addr.sll_addr);*/ | |
setsockopt(s, SOL_SOCKET, PACKET_RX_RING, (void *) &req, sizeof(req)); | |
memset(&addr, 0, sizeof(struct sockaddr_ll)); // обнуляем структуру | |
addr.sll_family = AF_PACKET; | |
// addr.sll_protocol = htons(ETH_P_ALL); | |
addr.sll_ifindex = ifindex; | |
// addr.sll_hatype = 1; // ARP hardware type, 1 for Ethernet | |
addr.sll_pkttype = PACKET_HOST; // to us | |
addr.sll_halen = ETH_ALEN; | |
memset(addr.sll_addr, 0, sizeof(addr.sll_addr)); // обнуляем физический адрес | |
addr.sll_addr[0] = 0xb0; // address of the sender | |
addr.sll_addr[1] = 0xb1; | |
addr.sll_addr[2] = 0xb2; | |
addr.sll_addr[3] = 0xb3; | |
addr.sll_addr[4] = 0xb4; | |
addr.sll_addr[5] = 0xb5; | |
len = sizeof(addr); | |
bound = bind(s, (const struct sockaddr *) &addr, len); | |
if (bound == -1) { | |
perror("Ошибка при привязке сокета к интерфейсу"); | |
exit(EXIT_FAILURE); | |
} | |
//MMAP | |
//buf = (uint8_t *) malloc ( sizeof(uint8_t) * BUF_SIZE ); | |
buf = (void*) malloc( BUF_SIZE ); | |
// buf = (void*) malloc( ETH_FRAME_LEN ); | |
fprintf(stderr, "Интерфейс %s прослушивается\n", argv[1]); | |
wr_offset = 0; | |
while(wr_offset < (BUF_SIZE - ETH_FRAME_LEN) ) { | |
nbytes = recv(s, buf+wr_offset, ETH_FRAME_LEN, 0); | |
if (nbytes == -1) { | |
perror("Ошибка при получении данных из сокета"); | |
exit(EXIT_FAILURE); | |
} | |
fprintf(stderr, "\rПринято %" PRIu64 " байт", wr_offset); | |
wr_offset += nbytes; | |
} | |
printf("\n"); | |
//fprintf(stderr, "Принято %X байт", wr_offset); | |
for (i=0; i<wr_offset; i+=32) { | |
for (j=i; j<i+32; j++) | |
printf("%02X",((unsigned char *)buf)[j] ); | |
printf("\n"); | |
} | |
printf("\n"); | |
exit(EXIT_SUCCESS); | |
} |
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