separate bgp declaration into separate header file.
bgp message types will now appear on topmost frame. From: gregh@cc.gatech.edu (Greg Hankins) svn path=/trunk/; revision=958
This commit is contained in:
Jun-ichiro itojun Hagino
parent
c0340af891
commit
be887ebafc
147
packet-bgp.c
147
packet-bgp.c
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@ -2,7 +2,7 @@
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* Routines for BGP packet dissection
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* Copyright 1999, Jun-ichiro itojun Hagino <itojun@itojun.org>
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*
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* $Id: packet-bgp.c,v 1.4 1999/10/31 00:20:44 itojun Exp $
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* $Id: packet-bgp.c,v 1.5 1999/11/01 06:57:01 itojun Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@unicom.net>
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@ -50,51 +50,14 @@
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#include <string.h>
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#include <glib.h>
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#include "packet.h"
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#include "packet-bgp.h"
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#include "packet-ipv6.h"
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struct bgp {
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guint8 bgp_marker[16];
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guint16 bgp_len;
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guint8 bgp_type;
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};
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#define BGP_SIZE 19
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#define BGP_OPEN 1
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#define BGP_UPDATE 2
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#define BGP_NOTIFICATION 3
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#define BGP_KEEPALIVE 4
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struct bgp_open {
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guint8 bgpo_marker[16];
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guint16 bgpo_len;
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guint8 bgpo_type;
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guint8 bgpo_version;
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guint16 bgpo_myas;
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guint16 bgpo_holdtime;
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guint32 bgpo_id;
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guint8 bgpo_optlen;
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/* options should follow */
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};
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struct bgp_notification {
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guint8 bgpn_marker[16];
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guint16 bgpn_len;
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guint8 bgpn_type;
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guint8 bgpn_major;
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guint8 bgpn_minor;
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/* data should follow */
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};
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struct bgp_attr {
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guint8 bgpa_flags;
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guint8 bgpa_type;
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};
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static const value_string bgptypevals[] = {
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{ BGP_OPEN, "OPEN" },
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{ BGP_UPDATE, "UPDATE" },
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{ BGP_NOTIFICATION, "NOTIFICATION" },
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{ BGP_KEEPALIVE, "KEEPALIVE" },
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{ BGP_OPEN, "OPEN Message" },
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{ BGP_UPDATE, "UPDATE Message" },
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{ BGP_NOTIFICATION, "NOTIFICATION Message" },
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{ BGP_KEEPALIVE, "KEEPALIVE Message" },
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{ 0, NULL },
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};
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@ -159,16 +122,6 @@ static const value_string bgpattr_origin[] = {
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{ 0, NULL },
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};
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#define BGPTYPE_ORIGIN 1
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#define BGPTYPE_AS_PATH 2
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#define BGPTYPE_NEXT_HOP 3
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#define BGPTYPE_MULTI_EXIT_DISC 4
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#define BGPTYPE_LOCAL_PREF 5
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#define BGPTYPE_ATOMIC_AGGREGATE 6
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#define BGPTYPE_AGGREGATOR 7
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#define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
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#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
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static const value_string bgpattr_type[] = {
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{ BGPTYPE_ORIGIN, "ORIGIN" },
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{ BGPTYPE_AS_PATH, "AS_PATH" },
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@ -191,23 +144,6 @@ static const value_string bgpattr_nlri_safi[] = {
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{ 0, NULL },
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};
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/* RFC1700 address family numbers */
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#define AFNUM_INET 1
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#define AFNUM_INET6 2
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#define AFNUM_NSAP 3
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#define AFNUM_HDLC 4
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#define AFNUM_BBN1822 5
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#define AFNUM_802 6
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#define AFNUM_E163 7
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#define AFNUM_E164 8
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#define AFNUM_F69 9
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#define AFNUM_X121 10
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#define AFNUM_IPX 11
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#define AFNUM_ATALK 12
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#define AFNUM_DECNET 13
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#define AFNUM_BANYAN 14
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#define AFNUM_E164NSAP 15
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static const value_string afnumber[] = {
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{ 0, "Reserved" },
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{ AFNUM_INET, "IPv4" },
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@ -229,7 +165,6 @@ static const value_string afnumber[] = {
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{ 0, NULL },
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};
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static int proto_bgp = -1;
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#ifndef offsetof
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@ -346,7 +281,7 @@ dissect_bgp_update(const u_char *pd, int offset, frame_data *fd,
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memcpy(&bgp, &pd[offset], sizeof(bgp));
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hlen = ntohs(bgp.bgp_len);
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p = &pd[offset + BGP_SIZE]; /*XXX*/
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p = &pd[offset + BGP_HEADER_SIZE]; /*XXX*/
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proto_tree_add_text(tree, p - pd, 2,
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"Unfeasible routes length: %d", len = ntohs(*(guint16 *)p));
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ti = proto_tree_add_text(tree, p - pd, len,
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@ -754,6 +689,7 @@ dissect_bgp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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proto_tree *bgp1_tree;
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const u_char *p;
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int l, i;
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int found;
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static u_char marker[] = {
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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@ -765,20 +701,45 @@ dissect_bgp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "BGP");
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if (check_col(fd, COL_INFO))
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col_add_fstr(fd, COL_INFO, "BGP Data ...");
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p = &pd[offset];
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l = END_OF_FRAME;
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i = 0;
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found = -1;
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/* run through the TCP packet looking for BGP headers */
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/* this is done twice, but this way each message type can be
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printed in the COL_INFO field */
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while (i < l) {
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/* look for bgp header */
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if (p[i] != 0xff) {
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i++;
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continue;
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}
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CHECK_SIZE(i, sizeof(marker), l);
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if (memcmp(&p[i], marker, sizeof(marker)) != 0) {
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i++;
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continue;
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}
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memcpy(&bgp, &p[i], sizeof(bgp));
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found++;
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hlen = ntohs(bgp.bgp_len);
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typ = val_to_str(bgp.bgp_type, bgptypevals, "Unknown Message");
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if (check_col(fd, COL_INFO)) {
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if (found == 0)
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col_add_fstr(fd, COL_INFO, "%s", typ);
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else
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col_append_fstr(fd, COL_INFO, ", %s", typ);
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}
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i += hlen;
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}
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if (tree) {
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ti = proto_tree_add_text(tree, offset, END_OF_FRAME,
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"Border Gateway Protocol");
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bgp_tree = proto_item_add_subtree(ti, ETT_BGP);
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#define CHECK_SIZE(x, s, l) \
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do { \
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if ((x) + (s) > (l)) \
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return; \
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} while (0)
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p = &pd[offset];
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l = END_OF_FRAME;
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i = 0;
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@ -796,33 +757,38 @@ do { \
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memcpy(&bgp, &p[i], sizeof(bgp));
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hlen = ntohs(bgp.bgp_len);
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typ = val_to_str(bgp.bgp_type, bgptypevals, "Unknown");
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typ = val_to_str(bgp.bgp_type, bgptypevals, "Unknown Message");
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if (END_OF_FRAME < hlen) {
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ti = proto_tree_add_text(bgp_tree, offset + i, END_OF_FRAME,
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"BGP header, truncated: %s (%u)",
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typ, bgp.bgp_type);
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"%s, Truncated", typ);
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} else {
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ti = proto_tree_add_text(bgp_tree, offset + i, hlen,
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"BGP header: %s (%u)",
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typ, bgp.bgp_type);
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"%s", typ);
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}
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bgp1_tree = proto_item_add_subtree(ti, ETT_BGP);
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if (hlen < 19 || hlen > 4096) {
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proto_tree_add_text(bgp1_tree, offset, BGP_MARKER_SIZE, "Marker",
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NULL);
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if (hlen < BGP_HEADER_SIZE || hlen > BGP_MAX_PACKET_SIZE) {
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proto_tree_add_text(bgp1_tree,
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offset + i + offsetof(struct bgp, bgp_len), 2,
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"Length, out of range: %u", hlen);
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"Length: Invalid %u %s", hlen,
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(hlen == 1) ? "byte" : "bytes");
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} else {
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proto_tree_add_text(bgp1_tree,
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offset + i + offsetof(struct bgp, bgp_len), 2,
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"Length: %u", hlen);
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"Length: %u %s", hlen,
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(hlen == 1) ? "byte" : "bytes");
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}
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proto_tree_add_text(bgp1_tree,
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offset + i + offsetof(struct bgp, bgp_type), 1,
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"Type: %s (%u)", typ, bgp.bgp_type);
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CHECK_SIZE(i, hlen, l);
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/* now, handle each message type */
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switch (bgp.bgp_type) {
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case BGP_OPEN:
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dissect_bgp_open(pd, offset + i, fd, bgp1_tree);
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@ -833,6 +799,11 @@ do { \
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case BGP_NOTIFICATION:
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dissect_bgp_notification(pd, offset + i, fd, bgp1_tree);
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break;
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case BGP_KEEPALIVE:
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/* no data in KEEPALIVE messages */
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break;
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default:
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break;
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}
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i += hlen;
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