Leonid Edrenkin leonid-ed

leonid-ed / prepare-commit-msg

Last active April 28, 2016 08:00

.git/hooks/prepare-commit-msg showing latest 15 commit messages

leonid-ed / udp_to_local.c

Last active March 19, 2025 11:00

Examples of using raw sockets (c, linux, raw socket)

	/*
	An example of using raw sockets.

	You can capture packets by tcpdump:
	tcpdump -X -s0 -i lo -p udp
	*/

	#include <stdlib.h>
	#include <unistd.h>
	#include <stdio.h>

leonid-ed / ifdebug_snippet.xml

Last active November 18, 2015 12:12

Sublime Text 2/3 snippet, what puts wrapper code for DEBUG preprocessor directive

	<snippet>
	<content><![CDATA[
	#ifdef DEBUG
	#endif // DEBUG
	]]></content>
	<!-- Optional: Set a tabTrigger to define how to trigger the snippet -->
	<tabTrigger>ifdebug</tabTrigger>
	<!-- Optional: Set a scope to limit where the snippet will trigger -->
	<scope>source.c++, source.c</scope>
	</snippet>

leonid-ed / h_guard_snippet.xml

Last active November 8, 2024 08:01 — forked from Muon/gist:2561013

C/C++ header guard snippet for Sublime Text 2/3

	<snippet>
	<content><![CDATA[
	#ifndef ${TM_FILEPATH/(([A-Za-z]+)\/src\/)\|./\U(?1:$2_)\E/g}${TM_FILENAME/(([A-Z])([A-Z][a-z]))\|(([a-z])([A-Z]))\|([a-z])\|(\.)/\U(?1:$2_$3)(?4:$5_$6)$7(?8:_)\E/g}
	#define ${TM_FILEPATH/(([A-Za-z]+)\/src\/)\|./\U(?1:$2_)\E/g}${TM_FILENAME/(([A-Z])([A-Z][a-z]))\|(([a-z])([A-Z]))\|([a-z])\|(\.)/\U(?1:$2_$3)(?4:$5_$6)$7(?8:_)\E/g}

	$0

	#endif // ${TM_FILEPATH/(([A-Za-z]+)\/src\/)\|./\U(?1:$2_)\E/g}${TM_FILENAME/(([A-Z])([A-Z][a-z]))\|(([a-z])([A-Z]))\|([a-z])\|(\.)/\U(?1:$2_$3)(?4:$5_$6)$7(?8:_)\E/g}
	]]></content>
	<!-- Optional: Set a tabTrigger to define how to trigger the snippet -->

leonid-ed / ip_checksum.c

Created November 5, 2015 07:48

This function calculates a checksum of ip header

	/*
	* This function calculates a checksum of ip header.
	* Reference: http://www.microhowto.info/howto/calculate_an_internet_protocol_checksum_in_c.html
	*/

	uint16_t ip_checksum(void* vdata, size_t length)
	{
	// Cast the data pointer to one that can be indexed.
	char* data=(char*)vdata;

leonid-ed / hexDump.c

Last active July 1, 2024 06:22

This function prints hex dump of memory specified as a pointer

	/*
	* This function prints hex dump of memory specified as a pointer.
	* Reference: http://stackoverflow.com/questions/7775991/how-to-get-hexdump-of-a-structure-data
	*/
	#include <stdio.h>

	void hexDump(char desc, void addr, int len)
	{
	int i;
	unsigned char buff[17];

leonid-ed / bits_operation.h

Last active April 8, 2018 16:35

Macros for bit's manipulation: get bit, set bit, reset bit.