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twaldecker/sendRawEth.c

Forked from austinmarton/sendRawEth.c
Created September 22, 2012 08:13
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Revisions

  1. twaldecker revised this gist Sep 22, 2012. 1 changed file with 85 additions and 81 deletions.
    166 changes: 85 additions & 81 deletions sendRawEth.c
    View file
    Original file line number Diff line number Diff line change
    @@ -1,8 +1,12 @@
    /*
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    * Added the command line arguments for interface and MAC Address
    *
    * Based on raw Ethernet from austinmarton: https://gist.github.com/1922600
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    */

    #include <arpa/inet.h>
    @@ -15,90 +19,90 @@
    #include <net/if.h>
    #include <netinet/ether.h>

    #define MY_DEST_MAC0 0x00
    #define MY_DEST_MAC1 0x00
    #define MY_DEST_MAC2 0x00
    #define MY_DEST_MAC3 0x00
    #define MY_DEST_MAC4 0x00
    #define MY_DEST_MAC5 0x00

    #define DEFAULT_IF "eth0"
    #define BUF_SIZ 1024
    #define DEFAULT_IF "eth0"
    #define BUF_SIZ 1024

    int main(int argc, char *argv[])
    {
    int sockfd;
    struct ifreq if_idx;
    struct ifreq if_mac;
    int tx_len = 0;
    char sendbuf[BUF_SIZ];
    struct ether_header *eh = (struct ether_header *) sendbuf;
    struct iphdr *iph = (struct iphdr *) (sendbuf + sizeof(struct ether_header));
    struct sockaddr_ll socket_address;
    char ifName[IFNAMSIZ];

    /* Get interface name */
    if (argc > 1)
    strcpy(ifName, argv[1]);
    else
    strcpy(ifName, DEFAULT_IF);
    int sockfd;
    struct ifreq if_idx;
    struct ifreq if_mac;
    int tx_len = 0;
    char sendbuf[BUF_SIZ];
    struct ether_header *eh = (struct ether_header *) sendbuf;
    struct iphdr *iph = (struct iphdr *) (sendbuf + sizeof(struct ether_header));
    struct sockaddr_ll socket_address;
    char ifName[IFNAMSIZ];
    unsigned int mac[6]; //using as uint8_t

    /* Get interface name */
    if (argc > 1){
    strcpy(ifName, argv[1]);
    if (argc > 2) { /* 2 arguments, second argument is mac */
    sscanf(argv[2], "%02x:%02x:%02x:%02x:%02x:%02x", &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]);
    //printf("mac:\n");
    //printf("%2x:%2x:%2x:%2x:%2x:%2x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
    }
    }
    else
    strcpy(ifName, DEFAULT_IF);

    /* Open RAW socket to send on */
    if ((sockfd = socket(AF_PACKET, SOCK_RAW, IPPROTO_RAW)) == -1) {
    perror("socket");
    }
    /* Open RAW socket to send on */
    if ((sockfd = socket(AF_PACKET, SOCK_RAW, IPPROTO_RAW)) == -1) {
    perror("socket");
    }

    /* Get the index of the interface to send on */
    memset(&if_idx, 0, sizeof(struct ifreq));
    strncpy(if_idx.ifr_name, ifName, IFNAMSIZ-1);
    if (ioctl(sockfd, SIOCGIFINDEX, &if_idx) < 0)
    perror("SIOCGIFINDEX");
    /* Get the MAC address of the interface to send on */
    memset(&if_mac, 0, sizeof(struct ifreq));
    strncpy(if_mac.ifr_name, ifName, IFNAMSIZ-1);
    if (ioctl(sockfd, SIOCGIFHWADDR, &if_mac) < 0)
    perror("SIOCGIFHWADDR");
    /* Get the index of the interface to send on */
    memset(&if_idx, 0, sizeof(struct ifreq));
    strncpy(if_idx.ifr_name, ifName, IFNAMSIZ-1);
    if (ioctl(sockfd, SIOCGIFINDEX, &if_idx) < 0)
    perror("SIOCGIFINDEX");
    /* Get the MAC address of the interface to send on */
    memset(&if_mac, 0, sizeof(struct ifreq));
    strncpy(if_mac.ifr_name, ifName, IFNAMSIZ-1);
    if (ioctl(sockfd, SIOCGIFHWADDR, &if_mac) < 0)
    perror("SIOCGIFHWADDR");

    /* Construct the Ethernet header */
    memset(sendbuf, 0, BUF_SIZ);
    /* Ethernet header */
    eh->ether_shost[0] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[0];
    eh->ether_shost[1] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[1];
    eh->ether_shost[2] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[2];
    eh->ether_shost[3] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[3];
    eh->ether_shost[4] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[4];
    eh->ether_shost[5] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[5];
    eh->ether_dhost[0] = MY_DEST_MAC0;
    eh->ether_dhost[1] = MY_DEST_MAC1;
    eh->ether_dhost[2] = MY_DEST_MAC2;
    eh->ether_dhost[3] = MY_DEST_MAC3;
    eh->ether_dhost[4] = MY_DEST_MAC4;
    eh->ether_dhost[5] = MY_DEST_MAC5;
    /* Ethertype field */
    eh->ether_type = htons(ETH_P_IP);
    tx_len += sizeof(struct ether_header);
    /* Construct the Ethernet header */
    memset(sendbuf, 0, BUF_SIZ);
    /* Ethernet header */
    eh->ether_shost[0] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[0];
    eh->ether_shost[1] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[1];
    eh->ether_shost[2] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[2];
    eh->ether_shost[3] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[3];
    eh->ether_shost[4] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[4];
    eh->ether_shost[5] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[5];
    eh->ether_dhost[0] = mac[0];
    eh->ether_dhost[1] = mac[1];
    eh->ether_dhost[2] = mac[2];
    eh->ether_dhost[3] = mac[3];
    eh->ether_dhost[4] = mac[4];
    eh->ether_dhost[5] = mac[5];
    /* Ethertype field */
    eh->ether_type = htons(ETH_P_IP);
    tx_len += sizeof(struct ether_header);

    /* Packet data */
    sendbuf[tx_len++] = 0xde;
    sendbuf[tx_len++] = 0xad;
    sendbuf[tx_len++] = 0xbe;
    sendbuf[tx_len++] = 0xef;
    /* Packet data */
    sendbuf[tx_len++] = 0xde;
    sendbuf[tx_len++] = 0xad;
    sendbuf[tx_len++] = 0xbe;
    sendbuf[tx_len++] = 0xef;

    /* Index of the network device */
    socket_address.sll_ifindex = if_idx.ifr_ifindex;
    /* Address length*/
    socket_address.sll_halen = ETH_ALEN;
    /* Destination MAC */
    socket_address.sll_addr[0] = MY_DEST_MAC0;
    socket_address.sll_addr[1] = MY_DEST_MAC1;
    socket_address.sll_addr[2] = MY_DEST_MAC2;
    socket_address.sll_addr[3] = MY_DEST_MAC3;
    socket_address.sll_addr[4] = MY_DEST_MAC4;
    socket_address.sll_addr[5] = MY_DEST_MAC5;
    /* Index of the network device */
    socket_address.sll_ifindex = if_idx.ifr_ifindex;
    /* Address length*/
    socket_address.sll_halen = ETH_ALEN;
    /* Destination MAC */
    socket_address.sll_addr[0] = mac[0];
    socket_address.sll_addr[1] = mac[1];
    socket_address.sll_addr[2] = mac[2];
    socket_address.sll_addr[3] = mac[3];
    socket_address.sll_addr[4] = mac[4];
    socket_address.sll_addr[5] = mac[5];

    /* Send packet */
    if (sendto(sockfd, sendbuf, tx_len, 0, (struct sockaddr*)&socket_address, sizeof(struct sockaddr_ll)) < 0)
    printf("Send failed\n");
    /* Send packet */
    if (sendto(sockfd, sendbuf, tx_len, 0, (struct sockaddr*)&socket_address, sizeof(struct sockaddr_ll)) < 0)
    printf("Send failed\n");

    return 0;
    }
    return 0;
    }
  2. @austinmarton austinmarton revised this gist Jun 5, 2012. 1 changed file with 7 additions and 0 deletions.
    7 changes: 7 additions & 0 deletions sendRawEth.c
    View file
    Original file line number Diff line number Diff line change
    @@ -1,3 +1,10 @@
    /*
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    */

    #include <arpa/inet.h>
    #include <linux/if_packet.h>
    #include <stdio.h>
  3. @austinmarton austinmarton created this gist Feb 27, 2012.
    97 changes: 97 additions & 0 deletions sendRawEth.c
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,97 @@
    #include <arpa/inet.h>
    #include <linux/if_packet.h>
    #include <stdio.h>
    #include <string.h>
    #include <stdlib.h>
    #include <sys/ioctl.h>
    #include <sys/socket.h>
    #include <net/if.h>
    #include <netinet/ether.h>

    #define MY_DEST_MAC0 0x00
    #define MY_DEST_MAC1 0x00
    #define MY_DEST_MAC2 0x00
    #define MY_DEST_MAC3 0x00
    #define MY_DEST_MAC4 0x00
    #define MY_DEST_MAC5 0x00

    #define DEFAULT_IF "eth0"
    #define BUF_SIZ 1024

    int main(int argc, char *argv[])
    {
    int sockfd;
    struct ifreq if_idx;
    struct ifreq if_mac;
    int tx_len = 0;
    char sendbuf[BUF_SIZ];
    struct ether_header *eh = (struct ether_header *) sendbuf;
    struct iphdr *iph = (struct iphdr *) (sendbuf + sizeof(struct ether_header));
    struct sockaddr_ll socket_address;
    char ifName[IFNAMSIZ];

    /* Get interface name */
    if (argc > 1)
    strcpy(ifName, argv[1]);
    else
    strcpy(ifName, DEFAULT_IF);

    /* Open RAW socket to send on */
    if ((sockfd = socket(AF_PACKET, SOCK_RAW, IPPROTO_RAW)) == -1) {
    perror("socket");
    }

    /* Get the index of the interface to send on */
    memset(&if_idx, 0, sizeof(struct ifreq));
    strncpy(if_idx.ifr_name, ifName, IFNAMSIZ-1);
    if (ioctl(sockfd, SIOCGIFINDEX, &if_idx) < 0)
    perror("SIOCGIFINDEX");
    /* Get the MAC address of the interface to send on */
    memset(&if_mac, 0, sizeof(struct ifreq));
    strncpy(if_mac.ifr_name, ifName, IFNAMSIZ-1);
    if (ioctl(sockfd, SIOCGIFHWADDR, &if_mac) < 0)
    perror("SIOCGIFHWADDR");

    /* Construct the Ethernet header */
    memset(sendbuf, 0, BUF_SIZ);
    /* Ethernet header */
    eh->ether_shost[0] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[0];
    eh->ether_shost[1] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[1];
    eh->ether_shost[2] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[2];
    eh->ether_shost[3] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[3];
    eh->ether_shost[4] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[4];
    eh->ether_shost[5] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[5];
    eh->ether_dhost[0] = MY_DEST_MAC0;
    eh->ether_dhost[1] = MY_DEST_MAC1;
    eh->ether_dhost[2] = MY_DEST_MAC2;
    eh->ether_dhost[3] = MY_DEST_MAC3;
    eh->ether_dhost[4] = MY_DEST_MAC4;
    eh->ether_dhost[5] = MY_DEST_MAC5;
    /* Ethertype field */
    eh->ether_type = htons(ETH_P_IP);
    tx_len += sizeof(struct ether_header);

    /* Packet data */
    sendbuf[tx_len++] = 0xde;
    sendbuf[tx_len++] = 0xad;
    sendbuf[tx_len++] = 0xbe;
    sendbuf[tx_len++] = 0xef;

    /* Index of the network device */
    socket_address.sll_ifindex = if_idx.ifr_ifindex;
    /* Address length*/
    socket_address.sll_halen = ETH_ALEN;
    /* Destination MAC */
    socket_address.sll_addr[0] = MY_DEST_MAC0;
    socket_address.sll_addr[1] = MY_DEST_MAC1;
    socket_address.sll_addr[2] = MY_DEST_MAC2;
    socket_address.sll_addr[3] = MY_DEST_MAC3;
    socket_address.sll_addr[4] = MY_DEST_MAC4;
    socket_address.sll_addr[5] = MY_DEST_MAC5;

    /* Send packet */
    if (sendto(sockfd, sendbuf, tx_len, 0, (struct sockaddr*)&socket_address, sizeof(struct sockaddr_ll)) < 0)
    printf("Send failed\n");

    return 0;
    }