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create raw socket

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mykola2312 2024-12-18 10:19:13 +02:00
parent ab0bc2708f
commit 9294334bf1
1 changed files with 30 additions and 9 deletions
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39
main.c
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@ -1,18 +1,23 @@
#define _DEFAULT_SOURCE
#include <stdio.h> #include <stdio.h>
#include <stdint.h> #include <stdint.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/ethernet.h>
#include <linux/if_packet.h>
#include <linux/if_arp.h>
typedef uint8_t mac_t[6]; typedef uint8_t mac_t[6];
void parse_mac(const char* str, mac_t mac) void parse_mac(const char* str, mac_t mac) {
{
char* s = strdup(str); char* s = strdup(str);
char* octet = strtok(s, ":"); char* octet = strtok(s, ":");
int i = 0; int i = 0;
while (octet != NULL && i < 6) while (octet != NULL && i < 6) {
{
mac[i++] = strtol(octet, NULL, 16); mac[i++] = strtol(octet, NULL, 16);
octet = strtok(NULL, ":"); octet = strtok(NULL, ":");
@ -21,11 +26,27 @@ void parse_mac(const char* str, mac_t mac)
free(s); free(s);
} }
int main() int main(int argc, char** argv) {
{ // ifname hostMAC gatewayMAC targetMAC
mac_t t;
parse_mac("11:22:33:44:55:66", t); mac_t host, gateway, target;
printf("%x\n", t[5]); parse_mac(argv[2], host);
parse_mac(argv[3], gateway);
parse_mac(argv[4], target);
int raw = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (raw < 0) {
perror("socket");
return 1;
}
setsockopt(raw, SOL_SOCKET, SO_BINDTODEVICE, argv[1], strlen(argv[1]));
// test receive
while (1) {
uint8_t packet[1500];
ssize_t rd = recv(raw, packet, 1500, 0);
printf("%lu\n", rd);
}
return 0; return 0;
} }