diff options
Diffstat (limited to 'staging/layer4.c')
| -rw-r--r-- | staging/layer4.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/staging/layer4.c b/staging/layer4.c index a4431a1..8ccf80c 100644 --- a/staging/layer4.c +++ b/staging/layer4.c @@ -136,7 +136,32 @@ "| Of course all Ethernet fields can also be accessed.\n"\ "|\n" +#define MZ_IGMP_HELP \ + "| IGMP type: Send raw IGMP packets.\n" \ + "|\n" \ + "| Parameters Values Explanation \n" \ + "| ---------- ------------------------------------ -------------------\n" \ + "| v,ver 1-2 version\n" \ + "| t,type packet type:\n" \ + "| q,qry,query - memberhsip query\n" \ + "| j,join - join group\n" \ + "| l,lv,leave - leave group\n" \ + "| resp_time max response time (v2 only)\n" \ + "| igmp_sum checksum (optional)\n" \ + "| g,group group ipv4 address\n" \ + "\n" +int print_packet_help(char *help) +{ + if (mz_port) { + cli_print(gcli, "%s", help); + } else { + fprintf(stderr,"\n" MAUSEZAHN_VERSION "\n%s", help); + exit(0); + } + + return -1; +} // Note: If another function specified tx.udp_payload then it must also // set tx.udp_payload_s AND tx.udp_len = tx.udp_payload_s + 8 @@ -884,3 +909,79 @@ libnet_ptag_t create_tcp_packet (libnet_t *l) return t; } + +libnet_ptag_t create_igmp_packet(libnet_t *l) +{ + libnet_ptag_t t; + char argval[MAX_PAYLOAD_SIZE]; + int ver = 2; + uint8_t type = IGMP_MEMBERSHIP_QUERY; + uint8_t resp_time = 10; + uint16_t sum = 0; + uint32_t group = 0; + + if ((getarg(tx.arg_string, "help", NULL) == 1) && (mode == IGMP)) + return print_packet_help(MZ_IGMP_HELP); + + if (getarg(tx.arg_string, "ver", argval) == 1 || + getarg(tx.arg_string, "v", argval) == 1) { + + ver = str2int(argval); + if (ver == 1) + resp_time = 0; + } + + if (getarg(tx.arg_string, "type", argval) == 1 || + getarg(tx.arg_string, "t", argval) == 1) { + + if (strcmp("j", argval) == 0 || strcmp("join", argval) == 0) { + + if (ver == 1) + type = IGMP_V1_MEMBERSHIP_REPORT; + else if (ver == 2) + type = IGMP_V2_MEMBERSHIP_REPORT; + + } else if (strcmp("l", argval) == 0 || strcmp("lv", argval) == 0 || + strcmp("leave", argval) == 0) { + + type = IGMP_LEAVE_GROUP; + } + } + + if (getarg(tx.arg_string, "resp_time", argval) == 1) + resp_time = (uint8_t)str2int(argval); + + if (getarg(tx.arg_string, "igmp_sum", argval) == 1) + sum = (uint16_t)str2int(argval); + + if (getarg(tx.arg_string, "group", argval) == 1 || + getarg(tx.arg_string, "g", argval) == 1) { + + group = str2ip32_rev(argval); + } + + if (type == IGMP_LEAVE_GROUP) { + tx.ip_dst = str2ip32_rev("224.0.0.2"); + } else if (type == IGMP_MEMBERSHIP_QUERY) { + if (ver == 1 || group == 0) + tx.ip_dst = str2ip32_rev("224.0.0.1"); + else if (ver == 2 && group != 0) + tx.ip_dst = group; + } else if (type == IGMP_V1_MEMBERSHIP_REPORT || + type == IGMP_V2_MEMBERSHIP_REPORT) { + + tx.ip_dst = group; + } + + if (getarg(tx.arg_string, "ttl", argval) == 0) + tx.ip_ttl = 1; + + t = libnet_build_igmp(type, resp_time, sum, group, NULL, 0, l, 0); + if (t == -1) { + fprintf(stderr, " mz/create_igmp_packet: Can't build IGMP header: %s\n", + libnet_geterror(l)); + exit (0); + } + + return t; +} |