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e1465ebe67
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b0678332d7
6 changed files with 61 additions and 132 deletions
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@ -7,15 +7,8 @@ project(igmpgen VERSION 1.0)
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set(CMAKE_C_STANDARD 11)
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set(CMAKE_C_STANDARD_REQUIRED True)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ggdb -Wall -Werror -D_GNU_SOURCE -pedantic")
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# Add the executable
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add_executable(
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igmpgen
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src/main.c
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src/usage.c
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)
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add_executable(igmpgen src/igmpgen.c)
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# Detect the net library
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find_library(LIBNET_LIBRARY NAMES net libnet libnet1 REQUIRED)
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5
build.sh
5
build.sh
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@ -1,5 +0,0 @@
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#!/bin/sh
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mkdir -p _build
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cmake -S . -B _build -D CMAKE_BUILD_TYPE=Debug
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cmake --build _build
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3
run.sh
3
run.sh
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@ -1,3 +0,0 @@
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#!/bin/sh
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gdb _build/igmpgen
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@ -2,21 +2,21 @@
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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/* missing type definitions (depending on system) */
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typedef unsigned char unchar;
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typedef unsigned short ushort;
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typedef unsigned int uint;
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typedef unsigned long ulong;
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#include <libnet.h>
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#include <netinet/igmp.h>
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#include "ipg_types.h"
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#define IPOPT_RA 148 /* router alert */
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#define IGMP_V3_MEMBERSHIP_REPORT 0x22
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/* global table of IGMP packet types*/
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ipg_igmp_extra_t g_igmp_pkts[] = {
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/* Structure to represent IGMP extra information */
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struct igmp_extra {
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u_int8_t igmp_version;
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char *igmp_tag;
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u_int8_t igmp_type; /* IGMP type */
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u_int8_t igmp_code; /* routing code */
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char *igmp_dst;
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int group_override_dst;
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} g_igmp_pkts[] = {
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/* name, type (or version+type), code */
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{ 1, "query", 0x11, 0, "224.0.0.1", 0 },
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{ 1, "report", 0x12, 0, "224.0.0.1", 1 },
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@ -27,26 +27,11 @@ ipg_igmp_extra_t g_igmp_pkts[] = {
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{ 3, "report", 0x22, 1, "224.0.0.22", 0 },
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/* Note: end of list (please keep) */
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{ 0, 0, 0, 0, 0, 0 },
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{ 0, 0, 0, 0 },
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};
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void usage(char *);
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ipg_igmp_extra_t * igmp_packet_type_find(u_int8_t igmp_version, char *igmp_request) {
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ipg_igmp_extra_t *pkt_ptr;
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pkt_ptr = g_igmp_pkts;
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while(pkt_ptr->igmp_version || pkt_ptr->igmp_tag){
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// if ((strcasecmp(pkt_ptr->igmp_tag, optarg) == 0)
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if ((strcasecmp(pkt_ptr->igmp_tag, igmp_request) == 0)
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&& (igmp_version == pkt_ptr->igmp_version)){
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return pkt_ptr;
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}
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pkt_ptr++;
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}
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return NULL;
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}
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int main(int argc, char **argv)
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{
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u_int32_t ip_src = 0;
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@ -55,17 +40,17 @@ int main(int argc, char **argv)
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char *igmp_group_str = NULL;
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char *ip_src_str = NULL;
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char *ip_dst_str = NULL;
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u_char igmp_type = 0;
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u_char igmp_code = 0;
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ipg_igmp_extra_t *pkt_ptr;
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int igmp_override;
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/* ports */
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u_short src_prt = 3141;
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u_short dst_prt = 5926;
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/* igmp stuff */
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u_char igmp_type = 0;
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u_char igmp_code = 0;
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u_int8_t igmp_version = 0;
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int igmp_override;
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struct igmp_extra *pkt_ptr;
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int ip_src_test = 1;
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int ip_dst_test = 1;
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@ -80,9 +65,9 @@ int main(int argc, char **argv)
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char *device = "eth0";
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int c;
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char *cp = NULL;
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int found=0;
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printf("IGMP packet generator\n\n");
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printf("Detected options:\n");
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/* Parsing command line */
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while((c = getopt(argc, argv, "i:t:g:d:s:")) != EOF)
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@ -101,20 +86,30 @@ int main(int argc, char **argv)
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}
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*cp++ = 0;
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// igmp_version = (u_short)atoi(cp);
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igmp_version = (u_short)atoi(optarg);
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pkt_ptr = igmp_packet_type_find(igmp_version, cp);
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if (!pkt_ptr) {
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printf("ERROR: Packet type %d.%s not found!\n", igmp_version, cp);
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pkt_ptr = g_igmp_pkts;
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while(pkt_ptr->igmp_version || pkt_ptr->igmp_tag){
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// if ((strcasecmp(pkt_ptr->igmp_tag, optarg) == 0)
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if ((strcasecmp(pkt_ptr->igmp_tag, cp) == 0)
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&& (igmp_version == pkt_ptr->igmp_version)){
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found = 1;
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igmp_type = pkt_ptr->igmp_type;
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igmp_code = pkt_ptr->igmp_code;
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ip_dst_str = pkt_ptr->igmp_dst;
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igmp_override = pkt_ptr->group_override_dst;
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break;
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}
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pkt_ptr++;
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}
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if (found){
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printf(" Packet = [%s] version [%d]\n", pkt_ptr->igmp_tag, igmp_version);
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} else {
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usage(argv[0]);
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exit(1);
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}
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igmp_type = pkt_ptr->igmp_type;
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igmp_code = pkt_ptr->igmp_code;
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ip_dst_str = pkt_ptr->igmp_dst;
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igmp_override = pkt_ptr->group_override_dst;
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printf(" Packet = [%s] version [%d]\n", pkt_ptr->igmp_tag, igmp_version);
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break;
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case 'g':
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@ -127,14 +122,13 @@ int main(int argc, char **argv)
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// delay between packets in sec
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break;
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case 'd':
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/*
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* We expect the input to be of the form `ip.ip.ip.ip:port`. We
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* We expect the input to be of the form `ip.ip.ip.ip.port`. We
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* point cp to the last dot of the IP address/port string and
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* then seperate them with a NULL byte. The optarg now points to
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* just the IP address, and cp points to the port.
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*/
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case 'd':
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if ((cp = strrchr(optarg, ':')))
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{
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*cp++ = 0;
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@ -163,18 +157,9 @@ int main(int argc, char **argv)
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exit(1);
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}
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}
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if (!igmp_group_str)
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if (!igmp_group_str || !device)
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{
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usage(argv[0]);
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fprintf(stderr, "ERROR: missing destination IGMP group\n");
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exit(EXIT_FAILURE);
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}
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if (!device)
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{
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usage(argv[0]);
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fprintf(stderr, "ERROR: missing device\n");
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exit(EXIT_FAILURE);
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}
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@ -369,4 +354,25 @@ int main(int argc, char **argv)
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return (c == -1 ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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void usage(char *name)
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{
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struct igmp_extra *pkt_ptr;
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fprintf(stderr, "Usage: %s [options]\n", name);
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fprintf(stderr, "\nOptions:\n");
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fprintf(stderr, " -i <interface> Specify the network interface (e.g., eth0)\n");
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fprintf(stderr, " -t <type> Specify the IGMP packet type and version (e.g., 1.query)\n");
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fprintf(stderr, " -g <group> Specify the IGMP group (e.g., 224.0.0.1)\n");
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fprintf(stderr, " -s <source> Specify the source IP and port (e.g., 192.168.1.1:1234)\n");
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fprintf(stderr, " -d <destination> Specify the destination IP and port (e.g., 224.0.0.2:5678)\n");
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fprintf(stderr, " -n <number> Specify delay between packets in seconds (optional)\n");
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fprintf(stderr, "\nAvailable IGMP packet types:\n");
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pkt_ptr = g_igmp_pkts;
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while(pkt_ptr->igmp_version || pkt_ptr->igmp_tag){
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fprintf(stderr," - %d.%s\n", pkt_ptr->igmp_version, pkt_ptr->igmp_tag);
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pkt_ptr++;
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}
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}
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// vim: ts=4 sts=4 sw=4 et
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@ -1,32 +0,0 @@
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#ifndef IGP_TYPES_H
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#define IGP_TYPES_H
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#define IPOPT_RA 148 /* router alert */
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#define IGMP_V3_MEMBERSHIP_REPORT 0x22
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#include <sys/types.h>
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/* Structure to represent IGMP extra information */
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typedef struct {
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u_int8_t igmp_version;
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char *igmp_tag;
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u_int8_t igmp_type; /* IGMP type */
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u_int8_t igmp_code; /* routing code */
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char *igmp_dst;
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int group_override_dst;
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} ipg_igmp_extra_t;
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typedef struct {
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char *device;
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char *igmp_type_version; // Combined type and version
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char *igmp_group;
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char *source_ip_port; // Combined source IP and port
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char *destination_ip_port; // Combined destination IP and port
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int delay_between_packets; // Optional, can be 0 if not specified
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} ipg_cmdline_options_t;
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extern ipg_igmp_extra_t g_igmp_pkts[];
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#endif /* IGP_TYPES_H */
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30
src/usage.c
30
src/usage.c
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@ -1,30 +0,0 @@
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#include <string.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include "ipg_types.h"
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void usage(const char *name)
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{
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ipg_igmp_extra_t *pkt_ptr;
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fprintf(stderr, "Usage: %s [options]\n", basename(name));
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fprintf(stderr, "\nOptions:\n");
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fprintf(stderr, " -i <interface> Specify the network interface (e.g., eth0)\n");
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fprintf(stderr, " -t <type> Specify the IGMP packet type and version (e.g., 1.query)\n");
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fprintf(stderr, " -g <group> Specify the destination IGMP group (e.g., 224.0.0.1)\n");
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fprintf(stderr, " -s <source> Specify the source IP and port (e.g., 192.168.1.1:1234)\n");
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fprintf(stderr, " -d <destination> Specify the destination IP and port (e.g., 224.0.0.2:5678)\n");
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fprintf(stderr, " -n <number> Specify delay between packets in seconds (optional)\n");
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fprintf(stderr, "\nAvailable IGMP packet types:\n");
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pkt_ptr = g_igmp_pkts;
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while(pkt_ptr->igmp_version || pkt_ptr->igmp_tag){
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fprintf(stderr," - %d.%s\n", pkt_ptr->igmp_version, pkt_ptr->igmp_tag);
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pkt_ptr++;
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}
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fprintf(stderr, "\n");
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}
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