forked from osmocom/wireshark
IGMP fixes and multicast traceroute support, from Heikki Vatiainen.
Assorted other fixes. svn path=/trunk/; revision=3677
This commit is contained in:
Guy Harris
parent
188717373e
commit
24ec54336f
1
AUTHORS
1
AUTHORS
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@ -235,6 +235,7 @@ Heikki Vatiainen <hessu@cs.tut.fi> {
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PIM enhancements and fixes
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Support for Enter/Return toggling expansion of selected protocol
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tree item
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IGMP fixes and multicast traceroute support
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}
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Greg Hankins <gregh@twoguys.org> {
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337
packet-igmp.c
337
packet-igmp.c
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@ -1,7 +1,7 @@
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/* packet-igmp.c 2001 Ronnie Sahlberg <rsahlber@bigpond.net.au>
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* Routines for IGMP packet disassembly
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*
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* $Id: packet-igmp.c,v 1.8 2001/07/02 09:23:02 guy Exp $
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* $Id: packet-igmp.c,v 1.9 2001/07/10 20:55:54 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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@ -54,6 +54,15 @@
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* Differs in second byte of protocol. Always 0 in V1
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Multicast traceroute was taken from
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draft-ietf-idmr-traceroute-ipm-07.txt
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Size in bytes for each packet
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type draft-ietf-idmr-traceroute-ipm-07.ps
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0x1e 24 + n*32
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0x1f 24 + n*32 (n == 0 for Query)
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x DVMRP Protocol see packet-dvmrp.c
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DVMRP is defined in the following RFCs
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@ -122,11 +131,31 @@ static int hf_record_type = -1;
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static int hf_aux_data_len = -1;
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static int hf_maddr = -1;
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static int hf_aux_data = -1;
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static int hf_mtrace_max_hops = -1;
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static int hf_mtrace_saddr = -1;
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static int hf_mtrace_raddr = -1;
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static int hf_mtrace_rspaddr = -1;
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static int hf_mtrace_resp_ttl = -1;
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static int hf_mtrace_q_id = -1;
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static int hf_mtrace_q_arrival = -1;
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static int hf_mtrace_q_inaddr = -1;
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static int hf_mtrace_q_outaddr = -1;
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static int hf_mtrace_q_prevrtr = -1;
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static int hf_mtrace_q_inpkt = -1;
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static int hf_mtrace_q_outpkt = -1;
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static int hf_mtrace_q_total = -1;
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static int hf_mtrace_q_rtg_proto = -1;
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static int hf_mtrace_q_fwd_ttl = -1;
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static int hf_mtrace_q_mbz = -1;
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static int hf_mtrace_q_s = -1;
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static int hf_mtrace_q_src_mask = -1;
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static int hf_mtrace_q_fwd_code = -1;
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static int ett_igmp = -1;
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static int ett_group_record = -1;
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static int ett_sqrv_bits = -1;
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static int ett_max_resp = -1;
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static int ett_mtrace_block = -1;
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#define MC_ALL_ROUTERS 0xe0000002
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#define MC_ALL_IGMPV3_ROUTERS 0xe0000016
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@ -146,14 +175,19 @@ static int ett_max_resp = -1;
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#define IGMP_V1_PIM_ROUTING_MESSAGE 0x14
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#define IGMP_V2_MEMBERSHIP_REPORT 0x16
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#define IGMP_V2_LEAVE_GROUP 0x17
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#define IGMP_V1_TRACEROUTE_RESPONSE 0x1e /* XXX */
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#define IGMP_V1_TRACEROUTE_MESSAGE 0x1f /* XXX */
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#define IGMP_V1_TRACEROUTE_RESPONSE 0x1e
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#define IGMP_V1_TRACEROUTE_MESSAGE 0x1f
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#define IGMP_V3_MEMBERSHIP_REPORT 0x22
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#define IGMP_TYPE_0x23 0x23
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#define IGMP_TYPE_0x24 0x24
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#define IGMP_TYPE_0x25 0x25
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#define IGMP_TYPE_0x26 0x26
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#define IGMP_TRACEROUTE_HDR_LEN 24
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#define IGMP_TRACEROUTE_RSP_LEN 32
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#define IGMP_TRACEROUTE_RESPONSE 0x1e
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#define IGMP_TRACEROUTE_QUERY_REQ 0x1f
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static const value_string commands[] = {
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{IGMP_V0_CREATE_GROUP_REQUEST, "Create Group Request" },
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{IGMP_V0_CREATE_GROUP_REPLY, "Create Group Reply" },
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@ -169,8 +203,6 @@ static const value_string commands[] = {
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{IGMP_V1_PIM_ROUTING_MESSAGE, "PIM Routing Message" },
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{IGMP_V2_MEMBERSHIP_REPORT, "Membership Report" },
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{IGMP_V2_LEAVE_GROUP, "Leave Group" },
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{IGMP_V1_TRACEROUTE_RESPONSE, "Traceroute Response" },
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{IGMP_V1_TRACEROUTE_MESSAGE, "Traceroute Message" },
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{IGMP_V3_MEMBERSHIP_REPORT, "Membership Report" },
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{0, NULL}
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};
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@ -227,6 +259,40 @@ static const value_string vs_record_type[] = {
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{ 0, NULL}
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};
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static const value_string mtrace_rtg_vals[] = {
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{1, "DVMRP" },
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{2, "MOSPF" },
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{3, "PIM" },
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{4, "CBT" },
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{5, "PIM using special routing table" },
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{6, "PIM using a static route" },
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{7, "DVMRP using a static route" },
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{8, "PIM using MBGP (aka BGP4+) route" },
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{9, "CBT using special routing table" },
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{10, "CBT using a static route" },
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{11, "PIM using state created by Assert processing" },
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{0, NULL}
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};
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static const value_string mtrace_fwd_code_vals[] = {
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{0x00, "NO_ERROR" },
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{0x01, "WRONG_IF" },
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{0x02, "PRUNE_SENT" },
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{0x03, "PRUNE_RCVD" },
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{0x04, "SCOPED" },
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{0x05, "NO_ROUTE" },
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{0x06, "WRONG_LAST_HOP" },
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{0x07, "NOT_FORWARDING" },
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{0x08, "REACHED_RP" },
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{0x09, "RPF_IF" },
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{0x0A, "NO_MULTICAST" },
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{0x0B, "INFO_HIDDEN" },
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{0x81, "NO_SPACE" },
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{0x82, "OLD_ROUTER" },
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{0x83, "ADMIN_PROHIB" },
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{0, NULL}
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};
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#define PRINT_IGMP_VERSION(version) \
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if (check_col(pinfo->fd, COL_INFO)) { \
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col_add_fstr(pinfo->fd, COL_INFO, \
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@ -355,7 +421,7 @@ dissect_v3_group_record(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tr
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guint16 num;
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guint32 ip;
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ip = tvb_get_letohl(tvb, offset+4);
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tvb_memcpy(tvb, (guint8 *)&ip, offset+4, 4);
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item = proto_tree_add_text(parent_tree, tvb, offset, 0,
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"Group Record : %s %s",
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ip_to_str((gchar*)&ip),
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@ -364,7 +430,7 @@ dissect_v3_group_record(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tr
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tree = proto_item_add_subtree(item, ett_group_record);
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/* record type */
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proto_tree_add_uint(tree, hf_record_type, tvb, offset, 1, tvb_get_guint8(tvb, offset));
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proto_tree_add_item(tree, hf_record_type, tvb, offset, 1, FALSE);
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offset += 1;
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/* aux data len */
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@ -378,20 +444,19 @@ dissect_v3_group_record(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tr
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offset += 2;
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/* multicast address */
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proto_tree_add_ipv4(tree, hf_maddr, tvb,
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offset, 4, tvb_get_letohl(tvb, offset));
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proto_tree_add_item(tree, hf_maddr, tvb, offset, 4, FALSE);
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offset += 4;
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/* source addresses */
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while(num--){
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proto_tree_add_ipv4(tree, hf_saddr, tvb,
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offset, 4, tvb_get_letohl(tvb, offset));
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proto_tree_add_item(tree, hf_saddr, tvb, offset, 4, FALSE);
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offset += 4;
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}
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/* aux data */
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if(adl){
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proto_tree_add_bytes(tree, hf_aux_data, tvb, offset, adl*4, tvb_get_ptr(tvb, offset, adl*4));
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proto_tree_add_item(tree, hf_aux_data, tvb, offset, adl*4,
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FALSE);
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offset += adl*4;
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}
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@ -445,14 +510,14 @@ dissect_igmp_v3_query(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int t
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offset += 2;
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/* group address */
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proto_tree_add_ipv4(tree, hf_maddr, tvb, offset, 4, tvb_get_letohl(tvb, offset));
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proto_tree_add_item(tree, hf_maddr, tvb, offset, 4, FALSE);
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offset +=4;
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/* bitmask for S and QRV */
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offset = dissect_v3_sqrv_bits(tvb, pinfo, tree, offset);
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/* qqic */
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proto_tree_add_uint(tree, hf_qqic, tvb, offset, 1, tvb_get_guint8(tvb, offset));
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proto_tree_add_item(tree, hf_qqic, tvb, offset, 1, FALSE);
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offset += 1;
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/*number of sources*/
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@ -460,8 +525,7 @@ dissect_igmp_v3_query(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int t
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offset += 2;
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while(num--){
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proto_tree_add_ipv4(tree, hf_saddr, tvb,
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offset, 4, tvb_get_letohl(tvb, offset));
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proto_tree_add_item(tree, hf_saddr, tvb, offset, 4, FALSE);
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offset += 4;
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}
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@ -487,7 +551,7 @@ dissect_igmp_v2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int type, i
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offset += 2;
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/* group address */
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proto_tree_add_ipv4(tree, hf_maddr, tvb, offset, 4, tvb_get_letohl(tvb, offset));
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proto_tree_add_item(tree, hf_maddr, tvb, offset, 4, FALSE);
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offset +=4;
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return offset;
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@ -507,7 +571,7 @@ dissect_igmp_v1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int type, i
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offset += 2;
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/* group address */
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proto_tree_add_ipv4(tree, hf_maddr, tvb, offset, 4, tvb_get_letohl(tvb, offset));
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proto_tree_add_item(tree, hf_maddr, tvb, offset, 4, FALSE);
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offset +=4;
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return offset;
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@ -539,20 +603,155 @@ dissect_igmp_v0(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int type, i
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offset += 2;
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/* identifier */
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proto_tree_add_uint(tree, hf_identifier, tvb, offset, 4, tvb_get_ntohl(tvb, offset));
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proto_tree_add_item(tree, hf_identifier, tvb, offset, 4, FALSE);
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offset += 4;
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/* group address */
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proto_tree_add_ipv4(tree, hf_maddr, tvb, offset, 4, tvb_get_letohl(tvb, offset));
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proto_tree_add_item(tree, hf_maddr, tvb, offset, 4, FALSE);
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offset +=4;
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/* access key */
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proto_tree_add_bytes(tree, hf_access_key, tvb, offset, 8, tvb_get_ptr(tvb, offset, 8));
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proto_tree_add_item(tree, hf_access_key, tvb, offset, 8, FALSE);
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offset +=8;
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return offset;
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}
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/* dissector for multicast traceroute, rfc???? */
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static int
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dissect_igmp_mtrace(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int type, int offset)
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{
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char *typestr, *blocks = NULL;
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char buf[20];
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/* All multicast traceroute packets (Query, Request and
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* Response) have the same fixed header. Request and Response
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* have one or more response data blocks following this fixed
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* header. Since Query and Request share the same IGMP type,
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* the method to differentiate between them is to check the
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* IGMP packet length. Queries are only
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* IGMP_TRACEROUTE_HDR_LEN bytes long.
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*/
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if (type == IGMP_TRACEROUTE_RESPONSE) {
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int i = (tvb_reported_length_remaining(tvb, offset) - IGMP_TRACEROUTE_HDR_LEN) / IGMP_TRACEROUTE_RSP_LEN;
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snprintf(buf, sizeof buf, ", %d block%s", i, plurality(i, "", "s"));
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typestr = "Traceroute Response";
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blocks = buf;
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} else if (tvb_length_remaining(tvb, offset) == IGMP_TRACEROUTE_HDR_LEN)
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typestr = "Traceroute Query";
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else
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typestr = "Traceroute Request";
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if (check_col(pinfo->fd, COL_INFO)) {
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col_set_str(pinfo->fd, COL_INFO, typestr);
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if (blocks) col_append_str(pinfo->fd, COL_INFO, blocks);
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}
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/* First add hidden for filtering, then add text for display purposes */
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proto_tree_add_uint_hidden(tree, hf_type, tvb, offset, 1, type);
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proto_tree_add_text(tree, tvb, offset, 1, "Type: %s (0x%x)", typestr, type);
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offset += 1;
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/* maximum number of hops that the requester wants to trace */
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proto_tree_add_item(tree, hf_mtrace_max_hops, tvb, offset, 1, FALSE);
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offset += 1;
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/* - 2 since the checksum covers the whole IGMP packet (the entire IP payload) */
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igmp_checksum(tree, tvb, tvb_length_remaining(tvb, offset - 2));
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offset += 2;
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/* group address to be traced */
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proto_tree_add_item(tree, hf_maddr, tvb, offset, 4, FALSE);
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offset += 4;
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/* address of multicast source for the path being traced */
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proto_tree_add_item(tree, hf_mtrace_saddr, tvb, offset, 4, FALSE);
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offset += 4;
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/* address of multicast receiver for the path being traced */
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proto_tree_add_item(tree, hf_mtrace_raddr, tvb, offset, 4, FALSE);
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offset += 4;
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/* address where the completed traceroute response packet gets sent */
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proto_tree_add_item(tree, hf_mtrace_rspaddr, tvb, offset, 4, FALSE);
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offset += 4;
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/* for multicasted responses, TTL at which to multicast the response */
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proto_tree_add_item(tree, hf_mtrace_resp_ttl, tvb, offset, 1, FALSE);
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offset += 1;
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/* unique identifier for this traceroute request (for e.g. duplicate/delay detection) */
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proto_tree_add_item(tree, hf_mtrace_q_id, tvb, offset, 3, FALSE);
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offset += 3;
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/* If this was Query, we only had the fixed header */
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if (tvb_reported_length_remaining(tvb, offset) == 0)
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return offset;
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/* Loop through the response data blocks */
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while (tvb_reported_length_remaining(tvb, offset) >= IGMP_TRACEROUTE_RSP_LEN) {
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proto_item *bi;
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proto_tree *block_tree;
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bi = proto_tree_add_text(tree, tvb, offset, IGMP_TRACEROUTE_RSP_LEN,
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"Response data block: %s -> %s, Proto: %s, Forwarding Code: %s",
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ip_to_str(tvb_get_ptr(tvb, offset + 4, 4)),
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ip_to_str(tvb_get_ptr(tvb, offset + 8, 4)),
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val_to_str(tvb_get_guint8(tvb, offset + 28), mtrace_rtg_vals, "Unknown"),
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val_to_str(tvb_get_guint8(tvb, offset + 31), mtrace_fwd_code_vals, "Unknown"));
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block_tree = proto_item_add_subtree(bi, ett_mtrace_block);
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/* Query Arrival Time */
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proto_tree_add_item(block_tree, hf_mtrace_q_arrival, tvb, offset, 4, FALSE);
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offset += 4;
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/* Incoming Interface Address */
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proto_tree_add_item(block_tree, hf_mtrace_q_inaddr, tvb, offset, 4, FALSE);
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offset += 4;
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/* Outgoing Interface Address */
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proto_tree_add_item(block_tree, hf_mtrace_q_outaddr, tvb, offset, 4, FALSE);
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offset += 4;
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/* Previous-Hop Router Address */
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proto_tree_add_item(block_tree, hf_mtrace_q_prevrtr, tvb, offset, 4, FALSE);
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offset += 4;
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/* Input packet count on incoming interface */
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proto_tree_add_item(block_tree, hf_mtrace_q_inpkt, tvb, offset, 4, FALSE);
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offset += 4;
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/* Output packet count on outgoing interface */
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proto_tree_add_item(block_tree, hf_mtrace_q_outpkt, tvb, offset, 4, FALSE);
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offset += 4;
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/* Total number of packets for this source-group pair */
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proto_tree_add_item(block_tree, hf_mtrace_q_total, tvb, offset, 4, FALSE);
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offset += 4;
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/* Routing protocol in use between this and previous-hop router */
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proto_tree_add_item(block_tree, hf_mtrace_q_rtg_proto, tvb, offset, 1, FALSE);
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offset += 1;
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/* TTL that a packet is required to be forwarded */
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proto_tree_add_item(block_tree, hf_mtrace_q_fwd_ttl, tvb, offset, 1, FALSE);
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offset += 1;
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/* Must be zeroed and ignored bit, S bit and src network mask length */
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proto_tree_add_item(block_tree, hf_mtrace_q_mbz, tvb, offset, 1, FALSE);
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proto_tree_add_item(block_tree, hf_mtrace_q_s, tvb, offset, 1, FALSE);
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proto_tree_add_item(block_tree, hf_mtrace_q_src_mask, tvb, offset, 1, FALSE);
|
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offset += 1;
|
||||
|
||||
/* Forwarding information/error code */
|
||||
proto_tree_add_item(block_tree, hf_mtrace_q_fwd_code, tvb, offset, 1, FALSE);
|
||||
offset += 1;
|
||||
}
|
||||
|
||||
|
||||
return offset;
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_igmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
|
||||
{
|
||||
|
|
@ -621,22 +820,9 @@ dissect_igmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
|
|||
offset = dissect_igmp_v2(tvb, pinfo, tree, type, offset);
|
||||
break;
|
||||
|
||||
case IGMP_V1_TRACEROUTE_RESPONSE:
|
||||
/* XXX - V1 or V2? */
|
||||
offset = dissect_igmp_v1(tvb, pinfo, tree, type, offset);
|
||||
/*
|
||||
* XXX - dissect the rest as traceroute response; see the
|
||||
* tcpdump IGMP dissector.
|
||||
*/
|
||||
break;
|
||||
|
||||
case IGMP_V1_TRACEROUTE_MESSAGE:
|
||||
/* XXX - V1 or V2? */
|
||||
offset = dissect_igmp_v1(tvb, pinfo, tree, type, offset);
|
||||
/*
|
||||
* XXX - dissect the rest as traceroute message; see the
|
||||
* tcpdump IGMP dissector.
|
||||
*/
|
||||
case IGMP_TRACEROUTE_RESPONSE:
|
||||
case IGMP_TRACEROUTE_QUERY_REQ:
|
||||
offset = dissect_igmp_mtrace(tvb, pinfo, tree, type, offset);
|
||||
break;
|
||||
|
||||
case IGMP_V3_MEMBERSHIP_REPORT:
|
||||
|
|
@ -782,12 +968,89 @@ proto_register_igmp(void)
|
|||
{ "Mantissa", "igmp.max_resp.mant", FT_UINT8, BASE_HEX,
|
||||
NULL, IGMP_MAX_RESP_MANT, "Maxmimum Response Time, Mantissa", HFILL }},
|
||||
|
||||
{ &hf_mtrace_max_hops,
|
||||
{ "# hops", "igmp.mtrace.max_hops", FT_UINT8, BASE_DEC,
|
||||
NULL, 0, "Maxmimum Number of Hops to Trace", HFILL }},
|
||||
|
||||
{ &hf_mtrace_saddr,
|
||||
{ "Source Address", "igmp.mtrace.saddr", FT_IPv4, BASE_NONE,
|
||||
NULL, 0, "Multicast Source for the Path Being Traced", HFILL }},
|
||||
|
||||
{ &hf_mtrace_raddr,
|
||||
{ "Receiver Address", "igmp.mtrace.raddr", FT_IPv4, BASE_NONE,
|
||||
NULL, 0, "Multicast Receiver for the Path Being Traced", HFILL }},
|
||||
|
||||
{ &hf_mtrace_rspaddr,
|
||||
{ "Response Address", "igmp.mtrace.rspaddr", FT_IPv4, BASE_NONE,
|
||||
NULL, 0, "Destination of Completed Traceroute Response", HFILL }},
|
||||
|
||||
{ &hf_mtrace_resp_ttl,
|
||||
{ "Response TTL", "igmp.mtrace.resp_ttl", FT_UINT8, BASE_DEC,
|
||||
NULL, 0, "TTL for Multicasted Responses", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_id,
|
||||
{ "Query ID", "igmp.mtrace.q_id", FT_UINT24, BASE_DEC,
|
||||
NULL, 0, "Identifier for this Traceroute Request", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_arrival,
|
||||
{ "Query Arrival", "igmp.mtrace.q_arrival", FT_UINT32, BASE_DEC,
|
||||
NULL, 0, "Query Arrival Time", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_inaddr,
|
||||
{ "In itf addr", "igmp.mtrace.q_inaddr", FT_IPv4, BASE_NONE,
|
||||
NULL, 0, "Incoming Interface Address", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_outaddr,
|
||||
{ "Out itf addr", "igmp.mtrace.q_outaddr", FT_IPv4, BASE_NONE,
|
||||
NULL, 0, "Outgoing Interface Address", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_prevrtr,
|
||||
{ "Previous rtr addr", "igmp.mtrace.q_prevrtr", FT_IPv4, BASE_NONE,
|
||||
NULL, 0, "Previous-Hop Router Address", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_inpkt,
|
||||
{ "In pkts", "igmp.mtrace.q_inpkt", FT_UINT32, BASE_DEC,
|
||||
NULL, 0, "Input packet count on incoming interface", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_outpkt,
|
||||
{ "Out pkts", "igmp.mtrace.q_outpkt", FT_UINT32, BASE_DEC,
|
||||
NULL, 0, "Output packet count on outgoing interface", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_total,
|
||||
{ "S,G pkt count", "igmp.mtrace.q_total", FT_UINT32, BASE_DEC,
|
||||
NULL, 0, "Total number of packets for this source-group pair", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_rtg_proto,
|
||||
{ "Rtg Protocol", "igmp.mtrace.q_rtg_proto", FT_UINT8, BASE_DEC,
|
||||
VALS(&mtrace_rtg_vals), 0, "Routing protocol between this and previous hop rtr", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_fwd_ttl,
|
||||
{ "FwdTTL", "igmp.mtrace.q_fwd_ttl", FT_UINT8, BASE_DEC,
|
||||
NULL, 0, "TTL required for forwarding", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_mbz,
|
||||
{ "MBZ", "igmp.mtrace.q_mbz", FT_UINT8, BASE_HEX,
|
||||
NULL, 0x80, "Must be zeroed on transmission and ignored on reception", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_s,
|
||||
{ "S", "igmp.mtrace.q_s", FT_UINT8, BASE_HEX,
|
||||
NULL, 0x40, "Set if S,G packet count is for source network", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_src_mask,
|
||||
{ "Src Mask", "igmp.mtrace.q_src_mask", FT_UINT8, BASE_HEX,
|
||||
NULL, 0x3F, "Source mask length. 63 when forwarding on group state", HFILL }},
|
||||
|
||||
{ &hf_mtrace_q_fwd_code,
|
||||
{ "Forwarding Code", "igmp.mtrace.q_fwd_code", FT_UINT8, BASE_HEX,
|
||||
VALS(&mtrace_fwd_code_vals), 0, "Forwarding information/error code", HFILL }},
|
||||
|
||||
};
|
||||
static gint *ett[] = {
|
||||
&ett_igmp,
|
||||
&ett_group_record,
|
||||
&ett_sqrv_bits,
|
||||
&ett_max_resp,
|
||||
&ett_mtrace_block,
|
||||
};
|
||||
|
||||
proto_igmp = proto_register_protocol("Internet Group Management Protocol",
|
||||
|
|
|
|||
Loading…
Reference in New Issue