igmpv3gen: Initial import.
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165
LICENSE.txt
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165
LICENSE.txt
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GNU LESSER GENERAL PUBLIC LICENSE
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Version 3, 29 June 2007
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Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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Everyone is permitted to copy and distribute verbatim copies
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This version of the GNU Lesser General Public License incorporates
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the terms and conditions of version 3 of the GNU General Public
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License, supplemented by the additional permissions listed below.
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0. Additional Definitions.
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As used herein, "this License" refers to version 3 of the GNU Lesser
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General Public License.
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An "Application" is any work that makes use of an interface provided
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6. Revised Versions of the GNU Lesser General Public License.
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Library.
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9
src/Makefile
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9
src/Makefile
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@ -0,0 +1,9 @@
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IGMPPROG=igmpgen
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CFLAGS=-Werror -Wall `libnet-config --defines`
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LDFLAGS=`libnet-config --libs`
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all:
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||||||
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gcc $(CFLAGS) $(IGMPPROG).c -o $(IGMPPROG) $(LDFLAGS)
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||||||
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clean:
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||||||
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rm -f $(IGMPPROG)
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336
src/igmpgen.c
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336
src/igmpgen.c
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#include <libnet.h>
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#include <netinet/igmp.h>
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#define IGMP_V3_MEMBERSHIP_REPORT 0x22
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||||||
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struct igmp_extra {
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||||||
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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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||||||
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{ 1, "dvmrp", 0x13, 0, "224.0.0.1", 0 },
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{ 2, "query", 0x11, 1, "224.0.0.1", 0 },
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{ 2, "report", 0x16, 1, "224.0.0.2", 1 },
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{ 2, "leave", 0x17, 1, "224.0.0.2", 0 },
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{ 3, "report", 0x22, 1, "224.0.0.22", 0 },
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{ 0, 0, 0, 0 },
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};
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||||||
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||||||
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void usage(char *);
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int main(int argc, char **argv)
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{
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/* ip addresses */
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u_int32_t ip_src = 0;
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u_int32_t ip_dst = 0;
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u_int32_t igmp_group = 0;
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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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/* ports */
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u_short src_prt = 3141;
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u_short dst_prt = 5926;
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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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int igmp_group_test =1;
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/* libnet stuff */
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char neterr[LIBNET_ERRBUF_SIZE];
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libnet_ptag_t ptag;
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libnet_t * netcontext = NULL;
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char *device = "eth0";
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/* misc */
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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("Parsing command line...\n");
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while((c = getopt(argc, argv, "i:t:g:d:s:")) != EOF)
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{
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switch (c)
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{
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case 'i':
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printf(" Net interface = [%s]\n",optarg);
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device = optarg;
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break;
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case 't':
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if (!(cp = strrchr(optarg, '.'))) {
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usage(argv[0]);
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exit(1);
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}
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*cp++ = 0;
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igmp_version = (u_short)atoi(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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&& (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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}
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break;
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case 'g':
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printf(" Group = [%s]\n", optarg);
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igmp_group_str = optarg;
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break;
|
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||||||
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case 'n':
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// delay between packets in sec
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||||||
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break;
|
||||||
|
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||||||
|
/*
|
||||||
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* We expect the input to be of the form `ip.ip.ip.ip.port`. We
|
||||||
|
* point cp to the last dot of the IP address/port string and
|
||||||
|
* 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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case 'd':
|
||||||
|
if ((cp = strrchr(optarg, ':')))
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||||||
|
{
|
||||||
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*cp++ = 0;
|
||||||
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dst_prt = (u_short)atoi(cp);
|
||||||
|
} else {
|
||||||
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dst_prt = 0;
|
||||||
|
}
|
||||||
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ip_dst_str = strdup(optarg);
|
||||||
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printf(" Destination = ip [%s] port [%d]\n", ip_dst_str, dst_prt);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case 's':
|
||||||
|
if ((cp = strrchr(optarg, ':')))
|
||||||
|
{
|
||||||
|
*cp++ = 0;
|
||||||
|
src_prt = (u_short)atoi(cp);
|
||||||
|
} else {
|
||||||
|
src_prt = 0;
|
||||||
|
}
|
||||||
|
ip_src_str = strdup(optarg);
|
||||||
|
printf(" Source = ip [%s] port [%d]\n", ip_src_str, src_prt);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (!igmp_group_str || !device)
|
||||||
|
{
|
||||||
|
usage(argv[0]);
|
||||||
|
exit(EXIT_FAILURE);
|
||||||
|
}
|
||||||
|
printf("done\n");
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Memory initialization
|
||||||
|
*/
|
||||||
|
printf("Initializing libnet context...");
|
||||||
|
netcontext = libnet_init(LIBNET_RAW4, device, neterr);
|
||||||
|
if (!netcontext){
|
||||||
|
fprintf(stderr,neterr);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
libnet_clear_packet(netcontext);
|
||||||
|
if (!ip_src_str)
|
||||||
|
{
|
||||||
|
ip_src = libnet_get_ipaddr4(netcontext);
|
||||||
|
ip_src_str = libnet_addr2name4(ip_src, LIBNET_DONT_RESOLVE);
|
||||||
|
}
|
||||||
|
|
||||||
|
printf("done\n");
|
||||||
|
|
||||||
|
|
||||||
|
printf("Packet construction...\n");
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Packet construction : IGMP
|
||||||
|
*/
|
||||||
|
printf(" Building IGMP content...\n");
|
||||||
|
|
||||||
|
// Override dest with group info when needed
|
||||||
|
if (igmp_override) {
|
||||||
|
ip_dst_str = igmp_group_str;
|
||||||
|
}
|
||||||
|
|
||||||
|
switch ( igmp_type ) {
|
||||||
|
case 0x11: // IGMP_MEMBERSHIP_QUERY
|
||||||
|
if (igmp_version == 2){
|
||||||
|
// group specific
|
||||||
|
} else if (igmp_version == 1) {
|
||||||
|
// general
|
||||||
|
igmp_group = 0;
|
||||||
|
igmp_group_str = "0.0.0.0";
|
||||||
|
igmp_group_test = 0;
|
||||||
|
}
|
||||||
|
// DST = 224.0.0.1
|
||||||
|
//igmp_group = 0;
|
||||||
|
//igmp_group_test = 0;
|
||||||
|
break;
|
||||||
|
case 0x12: //
|
||||||
|
default:
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ip_src_test
|
||||||
|
&& !(ip_src = libnet_name2addr4(netcontext, ip_src_str, LIBNET_RESOLVE)))
|
||||||
|
{
|
||||||
|
fprintf(stderr,"Bad source IP address: %s\n", ip_src_str);
|
||||||
|
fprintf(stderr,"%s\n", libnet_geterror(netcontext));
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ip_dst_test
|
||||||
|
&& !(ip_dst = libnet_name2addr4(netcontext, ip_dst_str, LIBNET_RESOLVE)))
|
||||||
|
{
|
||||||
|
fprintf(stderr,"Bad destination IP address: %s\n", ip_dst_str);
|
||||||
|
fprintf(stderr,"%s\n", libnet_geterror(netcontext));
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (igmp_group_test && !(igmp_group = libnet_name2addr4(netcontext, igmp_group_str, LIBNET_RESOLVE)))
|
||||||
|
{
|
||||||
|
fprintf(stderr,"Bad group IP address: %s\n", optarg);
|
||||||
|
fprintf(stderr,"%s\n", libnet_geterror(netcontext));
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
printf(" IP SRC IP = %s\n", ip_src_str);
|
||||||
|
printf(" IP DEST IP = %s\n", ip_dst_str);
|
||||||
|
printf(" IGMP TYPE = 0x%02x\n", igmp_type);
|
||||||
|
printf(" IGMP CODE = 0x%02x\n", igmp_code);
|
||||||
|
printf(" IGMP GROUP = %s\n", igmp_group_str);
|
||||||
|
printf(" GROUP TEST = %d\n", igmp_group_test);
|
||||||
|
|
||||||
|
/*
|
||||||
|
int test = 1;
|
||||||
|
if ( *(char *) test == 1) {
|
||||||
|
// little endian
|
||||||
|
printf("little endian\n");
|
||||||
|
} else {
|
||||||
|
// big endian
|
||||||
|
printf("big endian\n");
|
||||||
|
}
|
||||||
|
*/
|
||||||
|
|
||||||
|
ptag = libnet_build_igmp(
|
||||||
|
igmp_type, // IGMP type
|
||||||
|
igmp_code, // IGMP code or TTL
|
||||||
|
0, // checksum
|
||||||
|
htonl(igmp_group), // ip addr
|
||||||
|
NULL, // Ptr to packet data (or null)
|
||||||
|
0, // Packet payload length
|
||||||
|
netcontext, // Ptr to libnet context
|
||||||
|
0); // Build a new packet header
|
||||||
|
if (ptag < 0)
|
||||||
|
{
|
||||||
|
fprintf(stderr, "Error while building IGMP header data (err %d)\n", ptag);
|
||||||
|
fprintf(stderr,"%s\n", libnet_geterror(netcontext));
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
u_int8_t ipopt[2];
|
||||||
|
ipopt[0] = IPOPT_RA;
|
||||||
|
ipopt[1] = 4;
|
||||||
|
ptag = libnet_build_ipv4_options(
|
||||||
|
ipopt, // options
|
||||||
|
2, // options_s (length of option string)
|
||||||
|
netcontext, // libnet context
|
||||||
|
0 // ptag
|
||||||
|
);
|
||||||
|
if (ptag < 0)
|
||||||
|
{
|
||||||
|
fprintf(stderr, "Error while building IPv4 options data (err %d)\n", ptag);
|
||||||
|
}
|
||||||
|
|
||||||
|
ptag = libnet_build_ipv4(LIBNET_IPV4_H + LIBNET_IGMP_H, // pkg size + data
|
||||||
|
0, // IP tos
|
||||||
|
getpid(), // IP ID
|
||||||
|
IP_DF, // frag flags and offset
|
||||||
|
1, // TTL
|
||||||
|
IPPROTO_IGMP, // transport protocol
|
||||||
|
0, // checksum
|
||||||
|
ip_src, // source IP
|
||||||
|
ip_dst, // destination IP
|
||||||
|
NULL, // payload (none)
|
||||||
|
0, // payload length
|
||||||
|
netcontext, // libnet context
|
||||||
|
0 // build a new header
|
||||||
|
);
|
||||||
|
if (ptag < 0)
|
||||||
|
{
|
||||||
|
fprintf(stderr, "Error while building IPv4 header data (err %d)\n", ptag);
|
||||||
|
fprintf(stderr,"%s\n", libnet_geterror(netcontext));
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
printf(" done\n"); //IGMP content
|
||||||
|
|
||||||
|
c = libnet_write(netcontext);
|
||||||
|
if (c < 0)
|
||||||
|
{
|
||||||
|
fprintf(stderr,"%s\n", libnet_geterror(netcontext));
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
printf("construction and injection completed, wrote all %d bytes\n", c);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Free packet memory.
|
||||||
|
*/
|
||||||
|
libnet_diag_dump_pblock(netcontext);
|
||||||
|
libnet_destroy(netcontext);
|
||||||
|
exit(0);
|
||||||
|
|
||||||
|
return (c == -1 ? EXIT_FAILURE : EXIT_SUCCESS);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void usage(char *name)
|
||||||
|
{
|
||||||
|
struct igmp_extra *pkt_ptr;
|
||||||
|
fprintf(stderr, "usage: %s -i ethdevice -g group -t packet.version [-s ip:port] [-d ip:port]\n", name);
|
||||||
|
|
||||||
|
pkt_ptr = g_igmp_pkts;
|
||||||
|
fprintf(stderr,"\nAvailable packet types:\n");
|
||||||
|
while(pkt_ptr->igmp_version || pkt_ptr->igmp_tag){
|
||||||
|
fprintf(stderr," - %s.%d\n", pkt_ptr->igmp_tag, pkt_ptr->igmp_version);
|
||||||
|
pkt_ptr++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
// vim: ts=4 sts=4 sw=4 et
|
||||||
Loading…
Add table
Reference in a new issue