/* packet-ipv6.c
* Routines for IPv6 packet disassembly
*
+ * $Id: packet-ipv6.c,v 1.9 1999/07/07 22:51:45 gram Exp $
+ *
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
* Copyright 1998 Gerald Combs
# include "config.h"
#endif
-#include <gtk/gtk.h>
-#include <pcap.h>
-
-#include <stdio.h>
-
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
+#include <sys/socket.h>
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
-#include "ethereal.h"
+#include <string.h>
+#include <stdio.h>
+#include <glib.h>
#include "packet.h"
+#include "packet-ip.h"
#include "packet-ipv6.h"
#include "etypes.h"
+#include "resolv.h"
+
+#ifndef offsetof
+#define offsetof(type, member) ((size_t)(&((type *)0)->member))
+#endif
+
+static const char *
+inet_ntop6(const u_char *src, char *dst, size_t size);
+
+static const char *
+inet_ntop4(const u_char *src, char *dst, size_t size);
+
+static int
+dissect_routing6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
+ return 0;
+}
+
+static int
+dissect_frag6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
+ if (check_col(fd, COL_INFO)) {
+ col_add_fstr(fd, COL_INFO, "IPv6 fragment");
+ }
+ return 0;
+}
+
+static int
+dissect_hopopts(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
+ return 0;
+}
+
+static int
+dissect_dstopts(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
+ struct ip6_dest dstopt;
+ int len;
+ proto_tree *dstopt_tree;
+ proto_item *ti;
+
+ memcpy(&dstopt, (void *) &pd[offset], sizeof(dstopt));
+ len = (dstopt.ip6d_len + 1) << 3;
+
+ if (tree) {
+ /* !!! specify length */
+ ti = proto_tree_add_text(tree, offset, len,
+ "Destination Option Header");
+ dstopt_tree = proto_item_add_subtree(ti, ETT_IPv6);
+
+ proto_tree_add_text(dstopt_tree,
+ offset + offsetof(struct ip6_dest, ip6d_len), 1,
+ "Length: %d (%d bytes)", dstopt.ip6d_len, len);
+
+ /* decode... */
+ }
+
+ return len;
+}
+
void
-dissect_ipv6(const u_char *pd, int offset, frame_data *fd, GtkTree *tree) {
- GtkWidget *ipv6_tree, *ti;
-
- e_ipv6_header ipv6;
-
- memcpy(&ipv6, (void *) &pd[offset], 8);
-
- if (fd->win_info[0]) {
- switch(ipv6.next_header){
- /*
- case IP_PROTO_ICMP:
- case IP_PROTO_IGMP:
- case IP_PROTO_TCP:
- case IP_PROTO_UDP:
- case IP_PROTO_OSPF:
- */
- /* Names are set in the associated dissect_* routines */
- /* break; */
- default:
- strcpy(fd->win_info[3], "IPv6");
- sprintf(fd->win_info[4], "IPv6 support is still under development (%d)", ipv6.next_header);
- }
- }
+dissect_ipv6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
+ proto_tree *ipv6_tree;
+ proto_item *ti;
+ guint8 nxt;
+ int advance;
+
+ struct ip6_hdr ipv6;
+
+ memcpy(&ipv6, (void *) &pd[offset], sizeof(ipv6));
+
+ if (check_col(fd, COL_PROTOCOL))
+ col_add_str(fd, COL_PROTOCOL, "IPv6");
+ if (check_col(fd, COL_RES_NET_SRC))
+ col_add_str(fd, COL_RES_NET_SRC, get_hostname6(&ipv6.ip6_src));
+ if (check_col(fd, COL_UNRES_NET_SRC))
+ col_add_str(fd, COL_UNRES_NET_SRC, ip6_to_str(&ipv6.ip6_src));
+ if (check_col(fd, COL_RES_NET_DST))
+ col_add_str(fd, COL_RES_NET_DST, get_hostname6(&ipv6.ip6_dst));
+ if (check_col(fd, COL_UNRES_NET_DST))
+ col_add_str(fd, COL_UNRES_NET_DST, ip6_to_str(&ipv6.ip6_dst));
+
if (tree) {
/* !!! specify length */
- ti = add_item_to_tree(GTK_WIDGET(tree), offset, 40,
- "Internet Protocol Version 6");
- ipv6_tree = gtk_tree_new();
- add_subtree(ti, ipv6_tree, ETT_IPv6);
+ ti = proto_tree_add_text(tree, offset, 40, "Internet Protocol Version 6");
+ ipv6_tree = proto_item_add_subtree(ti, ETT_IPv6);
/* !!! warning: version also contains 4 Bit priority */
- add_item_to_tree(ipv6_tree, offset, 1, "Version: %d Priority: %d", ipv6.version >> 4 , ipv6.version & 15);
- add_item_to_tree(ipv6_tree, offset + 6, 1, "Next Header: %d", ipv6.next_header);
- add_item_to_tree(ipv6_tree, offset + 4, 2, "Payload Length: %d", ntohs(ipv6.payload_length));
+ proto_tree_add_text(ipv6_tree,
+ offset + offsetof(struct ip6_hdr, ip6_vfc), 1,
+ "Version: %d", ipv6.ip6_vfc >> 4);
+
+ proto_tree_add_text(ipv6_tree,
+ offset + offsetof(struct ip6_hdr, ip6_flow), 4,
+ "Traffic class: 0x%02x", (ntohl(ipv6.ip6_flow) >> 20) & 0xff);
+
+ /* there should be no alignment problems for ip6_flow, since it's the first
+ guint32 in the ipv6 struct */
+ proto_tree_add_text(ipv6_tree,
+ offset + offsetof(struct ip6_hdr, ip6_flow), 4,
+ "Flowlabel: 0x%05x", ntohl(ipv6.ip6_flow & IPV6_FLOWLABEL_MASK));
+
+ proto_tree_add_text(ipv6_tree,
+ offset + offsetof(struct ip6_hdr, ip6_plen), 2,
+ "Payload Length: %d", ntohs(ipv6.ip6_plen));
+
+ proto_tree_add_text(ipv6_tree,
+ offset + offsetof(struct ip6_hdr, ip6_nxt), 1,
+ "Next Header: %d", ipv6.ip6_nxt);
+
+ proto_tree_add_text(ipv6_tree,
+ offset + offsetof(struct ip6_hdr, ip6_hlim), 1,
+ "Hop limit: %d", ipv6.ip6_hlim);
+
+ proto_tree_add_text(ipv6_tree,
+ offset + offsetof(struct ip6_hdr, ip6_src), 16,
+#ifdef INET6
+ "Source address: %s (%s)",
+ get_hostname6(&ipv6.ip6_src),
+#else
+ "Source address: %s",
+#endif
+ ip6_to_str(&ipv6.ip6_src));
+
+ proto_tree_add_text(ipv6_tree,
+ offset + offsetof(struct ip6_hdr, ip6_dst), 16,
+#ifdef INET6
+ "Destination address: %s (%s)",
+ get_hostname6(&ipv6.ip6_dst),
+#else
+ "Destination address: %s",
+#endif
+ ip6_to_str(&ipv6.ip6_dst));
}
/* start of the new header (could be a extension header) */
offset += 40;
- switch (ipv6.next_header) {
- case IP_PROTO_ICMP:
- dissect_icmp(pd, offset, fd, tree);
- break;
- case IP_PROTO_IGMP:
- dissect_igmp(pd, offset, fd, tree);
- break;
- case IP_PROTO_TCP:
- dissect_tcp(pd, offset, fd, tree);
- break;
- case IP_PROTO_UDP:
- dissect_udp(pd, offset, fd, tree);
- break;
- case IP_PROTO_OSPF:
- dissect_ospf(pd, offset, fd, tree);
- break;
- default:
- dissect_data(pd, offset, fd, tree);
- }
+ nxt = ipv6.ip6_nxt;
+
+again:
+ switch (nxt) {
+ case IP_PROTO_HOPOPTS:
+ dissect_hopopts(pd, offset, fd, tree);
+#if 0
+ goto again;
+#else
+ break;
+#endif
+ case IP_PROTO_IPIP:
+ dissect_ip(pd, offset, fd, tree);
+ break;
+ case IP_PROTO_ROUTING:
+ dissect_routing6(pd, offset, fd, tree);
+#if 0
+ goto again;
+#else
+ break;
+#endif
+ case IP_PROTO_FRAGMENT:
+ dissect_frag6(pd, offset, fd, tree);
+#if 0
+ goto again;
+#else
+ break;
+#endif
+ case IP_PROTO_ICMPV6:
+ dissect_icmpv6(pd, offset, fd, tree);
+ break;
+ case IP_PROTO_NONE:
+ if (check_col(fd, COL_INFO)) {
+ col_add_fstr(fd, COL_INFO, "IPv6 no next header");
+ }
+ break;
+ case IP_PROTO_AH:
+ advance = dissect_ah(pd, offset, fd, tree);
+ nxt = pd[offset];
+ offset += advance;
+ goto again;
+ case IP_PROTO_ESP:
+ dissect_esp(pd, offset, fd, tree);
+ break;
+ case IP_PROTO_DSTOPTS:
+ advance = dissect_dstopts(pd, offset, fd, tree);
+ nxt = pd[offset];
+ offset += advance;
+ goto again;
+ case IP_PROTO_TCP:
+ dissect_tcp(pd, offset, fd, tree);
+ break;
+ case IP_PROTO_UDP:
+ dissect_udp(pd, offset, fd, tree);
+ break;
+ default:
+ if (check_col(fd, COL_INFO)) {
+ col_add_fstr(fd, COL_INFO, "Unknown IPv6 protocol (0x%02x)",
+ ipv6.ip6_nxt);
+ }
+ dissect_data(pd, offset, fd, tree);
+ }
+}
+
+gchar *
+ip6_to_str(struct e_in6_addr *ad) {
+ static gchar buf[4 * 8 + 8];
+
+ inet_ntop6((u_char*)ad, (gchar*)buf, sizeof(buf));
+ return buf;
+}
+
+#ifndef NS_IN6ADDRSZ
+#define NS_IN6ADDRSZ 16
+#endif
+
+#ifndef NS_INT16SZ
+#define NS_INT16SZ (sizeof(guint16))
+#endif
+
+#define SPRINTF(x) ((size_t)sprintf x)
+
+/*
+ * Copyright (c) 1996-1999 by Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+/* const char *
+ * inet_ntop4(src, dst, size)
+ * format an IPv4 address
+ * return:
+ * `dst' (as a const)
+ * notes:
+ * (1) uses no statics
+ * (2) takes a u_char* not an in_addr as input
+ * author:
+ * Paul Vixie, 1996.
+ */
+static const char *
+inet_ntop4(src, dst, size)
+ const u_char *src;
+ char *dst;
+ size_t size;
+{
+ static const char fmt[] = "%u.%u.%u.%u";
+ char tmp[sizeof "255.255.255.255"];
+
+ if (SPRINTF((tmp, fmt, src[0], src[1], src[2], src[3])) > size) {
+ return (NULL);
+ }
+ strcpy(dst, tmp);
+ return (dst);
+}
+
+/* const char *
+ * inet_ntop6(src, dst, size)
+ * convert IPv6 binary address into presentation (printable) format
+ * author:
+ * Paul Vixie, 1996.
+ */
+static const char *
+inet_ntop6(src, dst, size)
+ const u_char *src;
+ char *dst;
+ size_t size;
+{
+ /*
+ * Note that int32_t and int16_t need only be "at least" large enough
+ * to contain a value of the specified size. On some systems, like
+ * Crays, there is no such thing as an integer variable with 16 bits.
+ * Keep this in mind if you think this function should have been coded
+ * to use pointer overlays. All the world's not a VAX.
+ */
+ char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp;
+ struct { int base, len; } best, cur;
+ u_int words[NS_IN6ADDRSZ / NS_INT16SZ];
+ int i;
+
+ /*
+ * Preprocess:
+ * Copy the input (bytewise) array into a wordwise array.
+ * Find the longest run of 0x00's in src[] for :: shorthanding.
+ */
+ memset(words, '\0', sizeof words);
+ for (i = 0; i < NS_IN6ADDRSZ; i++)
+ words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
+ best.base = -1;
+ cur.base = -1;
+ for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
+ if (words[i] == 0) {
+ if (cur.base == -1)
+ cur.base = i, cur.len = 1;
+ else
+ cur.len++;
+ } else {
+ if (cur.base != -1) {
+ if (best.base == -1 || cur.len > best.len)
+ best = cur;
+ cur.base = -1;
+ }
+ }
+ }
+ if (cur.base != -1) {
+ if (best.base == -1 || cur.len > best.len)
+ best = cur;
+ }
+ if (best.base != -1 && best.len < 2)
+ best.base = -1;
+
+ /*
+ * Format the result.
+ */
+ tp = tmp;
+ for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
+ /* Are we inside the best run of 0x00's? */
+ if (best.base != -1 && i >= best.base &&
+ i < (best.base + best.len)) {
+ if (i == best.base)
+ *tp++ = ':';
+ continue;
+ }
+ /* Are we following an initial run of 0x00s or any real hex? */
+ if (i != 0)
+ *tp++ = ':';
+ /* Is this address an encapsulated IPv4? */
+ if (i == 6 && best.base == 0 &&
+ (best.len == 6 || (best.len == 5 && words[5] == 0xffff))) {
+ if (!inet_ntop4(src+12, tp, sizeof tmp - (tp - tmp)))
+ return (NULL);
+ tp += strlen(tp);
+ break;
+ }
+ tp += SPRINTF((tp, "%x", words[i]));
+ }
+ /* Was it a trailing run of 0x00's? */
+ if (best.base != -1 && (best.base + best.len) ==
+ (NS_IN6ADDRSZ / NS_INT16SZ))
+ *tp++ = ':';
+ *tp++ = '\0';
+
+ /*
+ * Check for overflow, copy, and we're done.
+ */
+ if ((size_t)(tp - tmp) > size) {
+ return (NULL);
+ }
+ strcpy(dst, tmp);
+ return (dst);
}
git.samba.org / obnox / wireshark / wip.git / blobdiff