*
* Heikki Vatiainen <hessu@cs.tut.fi>
*
- * $Id: packet-vrrp.c,v 1.3 2000/03/12 04:47:51 gram Exp $
+ * $Id: packet-vrrp.c,v 1.27 2003/06/12 06:58:38 guy Exp $
*
* Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@zing.org>
+ * By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
- *
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
- *
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
+ *
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# include "config.h"
#endif
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-
#include <string.h>
#include <glib.h>
-#include "packet.h"
+#include <epan/packet.h>
+#include "ipproto.h"
+#include "in_cksum.h"
static gint proto_vrrp = -1;
static gint ett_vrrp = -1;
static gint hf_vrrp_ver_type = -1;
static gint hf_vrrp_version = -1;
static gint hf_vrrp_type = -1;
+static gint hf_vrrp_virt_rtr_id = -1;
+static gint hf_vrrp_prio = -1;
+static gint hf_vrrp_count_ip = -1;
+static gint hf_vrrp_auth_type = -1;
+static gint hf_vrrp_adver_int = -1;
+static gint hf_vrrp_ip = -1;
+static gint hf_vrrp_ip6 = -1;
-struct vrrp_header {
#define VRRP_VERSION_MASK 0xf0
#define VRRP_TYPE_MASK 0x0f
- guint8 ver_type;
- guint8 vrouter_id;
- guint8 priority;
- guint8 count_ip_addrs;
- guint8 auth_type;
- guint8 adver_int;
- guint16 checksum;
- /* One or more IP addresses */
- /* 8 octets of authentication data */
#define VRRP_AUTH_DATA_LEN 8
-};
-
#define VRRP_TYPE_ADVERTISEMENT 1
static const value_string vrrp_type_vals[] = {
- {VRRP_TYPE_ADVERTISEMENT, "Advertisement"}
+ {VRRP_TYPE_ADVERTISEMENT, "Advertisement"},
+ {0, NULL}
};
#define VRRP_AUTH_TYPE_NONE 0
static const value_string vrrp_auth_vals[] = {
{VRRP_AUTH_TYPE_NONE, "No Authentication"},
{VRRP_AUTH_TYPE_SIMPLE_TEXT, "Simple Text Authentication"},
- {VRRP_AUTH_TYPE_IP_AUTH_HDR, "IP Authentication Header"}
+ {VRRP_AUTH_TYPE_IP_AUTH_HDR, "IP Authentication Header"},
+ {0, NULL}
};
#define VRRP_PRIORITY_MASTER_STOPPING 0
static const value_string vrrp_prio_vals[] = {
{VRRP_PRIORITY_MASTER_STOPPING, "Current Master has stopped participating in VRRP"},
{VRRP_PRIORITY_DEFAULT, "Default priority for a backup VRRP router"},
- {VRRP_PRIORITY_OWNER, "This VRRP router owns the virtual router's IP address(es)"}
+ {VRRP_PRIORITY_OWNER, "This VRRP router owns the virtual router's IP address(es)"},
+ {0, NULL }
};
-void dissect_vrrp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
+static void
+dissect_vrrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
- struct vrrp_header vrh;
- gboolean short_hdr = FALSE;
- gboolean short_packet = FALSE;
- guint calculated_len = -1; /* initialize to silence false warning from gcc */
-
- if (sizeof(struct vrrp_header) > END_OF_FRAME)
- short_hdr = short_packet = TRUE;
- else {
- memcpy(&vrh, pd + offset, sizeof(struct vrrp_header));
- calculated_len = sizeof(struct vrrp_header) + vrh.count_ip_addrs*4 + VRRP_AUTH_DATA_LEN;
- if (calculated_len > END_OF_FRAME)
- short_packet = TRUE;
- }
+ int offset = 0;
+ gint vrrp_len;
+ guint8 ver_type;
+ vec_t cksum_vec[4];
+ guint32 phdr[2];
- if (check_col(fd, COL_PROTOCOL))
- col_add_str(fd, COL_PROTOCOL, "VRRP");
-
- if (check_col(fd, COL_INFO)) {
- if (short_hdr)
- col_add_fstr(fd, COL_INFO, "Short packet header, length %u", END_OF_FRAME);
- else if (short_packet)
- col_add_fstr(fd, COL_INFO, "Packet length mismatch, calculated %u, real %u",
- calculated_len, END_OF_FRAME);
- else
- col_add_fstr(fd, COL_INFO, "%s (v%u)", "Announcement", hi_nibble(vrh.ver_type));
+ if (check_col(pinfo->cinfo, COL_PROTOCOL))
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "VRRP");
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_clear(pinfo->cinfo, COL_INFO);
+
+ ver_type = tvb_get_guint8(tvb, 0);
+ if (check_col(pinfo->cinfo, COL_INFO)) {
+ col_add_fstr(pinfo->cinfo, COL_INFO, "%s (v%u)",
+ "Announcement", hi_nibble(ver_type));
}
if (tree) {
proto_item *ti, *tv;
proto_tree *vrrp_tree, *ver_type_tree;
- guint8 ip_count, auth_len, auth_buf[VRRP_AUTH_DATA_LEN+1];
-
- if (short_hdr) {
- dissect_data(pd, offset, fd, tree);
- return;
- }
+ guint8 priority, ip_count = 0, auth_type;
+ guint16 cksum, computed_cksum;
+ guint8 auth_buf[VRRP_AUTH_DATA_LEN + 1];
- ti = proto_tree_add_item(tree, proto_vrrp, offset, END_OF_FRAME, NULL);
+ ti = proto_tree_add_item(tree, proto_vrrp, tvb, 0, -1, FALSE);
vrrp_tree = proto_item_add_subtree(ti, ett_vrrp);
- tv = proto_tree_add_uint_format(vrrp_tree, hf_vrrp_ver_type, offset, 1,
- vrh.ver_type, "Version %u, Packet type %u (%s)",
- hi_nibble(vrh.ver_type), lo_nibble(vrh.ver_type),
- val_to_str(lo_nibble(vrh.ver_type), vrrp_type_vals, "Unknown"));
+ tv = proto_tree_add_uint_format(vrrp_tree, hf_vrrp_ver_type,
+ tvb, offset, 1, ver_type,
+ "Version %u, Packet type %u (%s)",
+ hi_nibble(ver_type), lo_nibble(ver_type),
+ val_to_str(lo_nibble(ver_type), vrrp_type_vals, "Unknown"));
ver_type_tree = proto_item_add_subtree(tv, ett_vrrp_ver_type);
- proto_tree_add_item(ver_type_tree, hf_vrrp_version, offset, 1, vrh.ver_type);
- proto_tree_add_item(ver_type_tree, hf_vrrp_type, offset, 1, vrh.ver_type);
+ proto_tree_add_uint(ver_type_tree, hf_vrrp_version, tvb,
+ offset, 1, ver_type);
+ proto_tree_add_uint(ver_type_tree, hf_vrrp_type, tvb, offset, 1,
+ ver_type);
offset++;
-
- proto_tree_add_text(vrrp_tree, offset++, 1, "Virtual Router ID: %u", vrh.vrouter_id);
- proto_tree_add_text(vrrp_tree, offset++, 1, "Priority: %u (%s)", vrh.priority,
- val_to_str(vrh.priority, vrrp_prio_vals, "Non-default backup priority"));
- proto_tree_add_text(vrrp_tree, offset++, 1, "Count IP Addrs: %u", vrh.count_ip_addrs);
- proto_tree_add_text(vrrp_tree, offset++, 1, "Authentication Type: %u (%s)", vrh.auth_type,
- val_to_str(vrh.auth_type, vrrp_auth_vals, "Unknown"));
- proto_tree_add_text(vrrp_tree, offset++, 1, "Advertisement Interval: %u second%s",
- vrh.adver_int, plurality(vrh.adver_int, "", "s"));
- proto_tree_add_text(vrrp_tree, offset, 2, "Checksum: 0x%x", htons(vrh.checksum));
- offset+=2;
- if (short_packet) {
- dissect_data(pd, offset, fd, vrrp_tree);
- return;
- }
-
- ip_count = vrh.count_ip_addrs;
- while (ip_count > 0) {
- proto_tree_add_text(vrrp_tree, offset, 4, "Virtual Router IP address: %s",
- ip_to_str(pd+offset));
- offset+=4;
- ip_count--;
+ proto_tree_add_item(vrrp_tree, hf_vrrp_virt_rtr_id, tvb, offset, 1, FALSE);
+ offset++;
+
+ priority = tvb_get_guint8(tvb, offset);
+ proto_tree_add_uint_format(vrrp_tree, hf_vrrp_prio, tvb, offset, 1, priority, "Priority: %u (%s)",
+ priority,
+ val_to_str(priority, vrrp_prio_vals, "Non-default backup priority"));
+ offset++;
+
+ switch(hi_nibble(ver_type)) {
+ case 3:
+ /* Skip reserve field */
+ offset++;
+ break;
+ case 2:
+ default:
+ ip_count = tvb_get_guint8(tvb, offset);
+ proto_tree_add_uint(vrrp_tree, hf_vrrp_count_ip, tvb,
+ offset, 1, ip_count);
+ offset++;
+ break;
+ }
+
+ auth_type = tvb_get_guint8(tvb, offset);
+ proto_tree_add_item(vrrp_tree, hf_vrrp_auth_type, tvb, offset, 1, FALSE);
+ offset++;
+
+ proto_tree_add_item(vrrp_tree, hf_vrrp_adver_int, tvb, offset, 1, FALSE);
+ offset++;
+
+ cksum = tvb_get_ntohs(tvb, offset);
+ vrrp_len = (gint)tvb_reported_length(tvb);
+ if (!pinfo->fragmented && (gint)tvb_length(tvb) >= vrrp_len) {
+ /* The packet isn't part of a fragmented datagram
+ and isn't truncated, so we can checksum it. */
+ switch(hi_nibble(ver_type)) {
+ case 3:
+ /* Set up the fields of the pseudo-header. */
+ cksum_vec[0].ptr = pinfo->src.data;
+ cksum_vec[0].len = pinfo->src.len;
+ cksum_vec[1].ptr = pinfo->dst.data;
+ cksum_vec[1].len = pinfo->dst.len;
+ cksum_vec[2].ptr = (const guint8 *)&phdr;
+ phdr[0] = g_htonl(vrrp_len);
+ phdr[1] = g_htonl(IP_PROTO_VRRP);
+ cksum_vec[2].len = 8;
+ cksum_vec[3].ptr = tvb_get_ptr(tvb, 0, vrrp_len);
+ cksum_vec[3].len = vrrp_len;
+ computed_cksum = in_cksum(cksum_vec, 4);
+ break;
+ case 2:
+ default:
+ cksum_vec[0].ptr = tvb_get_ptr(tvb, 0, vrrp_len);
+ cksum_vec[0].len = vrrp_len;
+ computed_cksum = in_cksum(&cksum_vec[0], 1);
+ break;
+ }
+ if (computed_cksum == 0) {
+ proto_tree_add_text(vrrp_tree, tvb, offset, 2,
+ "Checksum: 0x%04x (correct)",
+ cksum);
+ } else {
+ proto_tree_add_text(vrrp_tree, tvb, offset, 2,
+ "Checksum: 0x%04x (incorrect, should be 0x%04x)",
+ cksum,
+ in_cksum_shouldbe(cksum, computed_cksum));
+ }
+ } else {
+ proto_tree_add_text(vrrp_tree, tvb, offset, 2,
+ "Checksum: 0x%04x", cksum);
}
+ offset+=2;
- if (vrh.auth_type != VRRP_AUTH_TYPE_SIMPLE_TEXT)
+ switch(hi_nibble(ver_type)) {
+ case 3:
+ proto_tree_add_item(vrrp_tree, hf_vrrp_ip6, tvb, offset, 16, FALSE);
+ offset+=16;
+ break;
+ case 2:
+ default:
+ while (ip_count > 0) {
+ proto_tree_add_item(vrrp_tree, hf_vrrp_ip, tvb,
+ offset, 4, FALSE);
+ offset+=4;
+ ip_count--;
+ }
+ break;
+ }
+ if (auth_type != VRRP_AUTH_TYPE_SIMPLE_TEXT)
return; /* Contents of the authentication data is undefined */
- strncpy(auth_buf, pd+offset, VRRP_AUTH_DATA_LEN);
- auth_buf[VRRP_AUTH_DATA_LEN] = '\0';
- auth_len = strlen(auth_buf);
- if (auth_len > 0)
- proto_tree_add_text(vrrp_tree, offset, auth_len, "Authentication string: `%s'", auth_buf);
+ tvb_get_nstringz0(tvb, offset, sizeof auth_buf, auth_buf);
+ if (auth_buf[0] != '\0')
+ proto_tree_add_text(vrrp_tree, tvb, offset,
+ VRRP_AUTH_DATA_LEN,
+ "Authentication string: `%s'",
+ auth_buf);
offset+=8;
-
}
-
- return;
}
void proto_register_vrrp(void)
{ &hf_vrrp_ver_type,
{"VRRP message version and type", "vrrp.typever",
FT_UINT8, BASE_DEC, NULL, 0x0,
- "VRRP version and type"}},
+ "VRRP version and type", HFILL }},
{ &hf_vrrp_version,
{"VRRP protocol version", "vrrp.version",
FT_UINT8, BASE_DEC, NULL, VRRP_VERSION_MASK,
- "VRRP version"}},
+ "VRRP version", HFILL }},
{ &hf_vrrp_type,
{"VRRP packet type", "vrrp.type",
FT_UINT8, BASE_DEC, VALS(vrrp_type_vals), VRRP_TYPE_MASK,
- "VRRP type"}}
+ "VRRP type", HFILL }},
+
+ { &hf_vrrp_virt_rtr_id,
+ {"Virtual Rtr ID", "vrrp.virt_rtr_id",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Virtual router this packet is reporting status for", HFILL }},
+
+ { &hf_vrrp_prio,
+ {"Priority", "vrrp.prio",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Sending VRRP router's priority for the virtual router", HFILL }},
+
+ { &hf_vrrp_count_ip,
+ {"Count IP Addrs", "vrrp.count_ip_addrs",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "The number of IP addresses contained in this VRRP advertisement", HFILL }},
+
+ { &hf_vrrp_auth_type,
+ {"Auth Type", "vrrp.auth_type",
+ FT_UINT8, BASE_DEC, VALS(vrrp_auth_vals), 0x0,
+ "The authentication method being utilized", HFILL }},
+
+ { &hf_vrrp_adver_int,
+ {"Adver Int", "vrrp.adver_int",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Time interval (in seconds) between ADVERTISEMENTS", HFILL }},
+
+ { &hf_vrrp_ip,
+ {"IP Address", "vrrp.ip_addr",
+ FT_IPv4, 0, NULL, 0x0,
+ "IP address associated with the virtual router", HFILL }},
+
+ { &hf_vrrp_ip6,
+ {"IPv6 Address", "vrrp.ipv6_addr",
+ FT_IPv6, 0, NULL, 0x0,
+ "IPv6 address associated with the virtual router", HFILL }},
};
static gint *ett[] = {
&ett_vrrp_ver_type
};
- proto_vrrp = proto_register_protocol("Virtual Router Redundancy Protocol", "vrrp");
+ proto_vrrp = proto_register_protocol("Virtual Router Redundancy Protocol",
+ "VRRP", "vrrp");
proto_register_field_array(proto_vrrp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
return;
}
+
+void
+proto_reg_handoff_vrrp(void)
+{
+ dissector_handle_t vrrp_handle;
+
+ vrrp_handle = create_dissector_handle(dissect_vrrp, proto_vrrp);
+ dissector_add("ip.proto", IP_PROTO_VRRP, vrrp_handle);
+}
git.samba.org / obnox / wireshark / wip.git / blobdiff