/* packet-ip.h
* Definitions for IP packet disassembly structures and routines
*
- * $Id$
- *
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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.
+ * SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __PACKET_IP_H__
#define __PACKET_IP_H__
-typedef struct _ws_ip
+#include "ws_symbol_export.h"
+
+/*
+ * IP Version numbers, from
+ *
+ * https://www.iana.org/assignments/version-numbers/version-numbers.xhtml
+ */
+#define IP_VERSION_NUM_RESERVED 0 /* Reserved */
+#define IP_VERSION_NUM_INET 4 /* IP (IP version 4) */
+#define IP_VERSION_NUM_ST 5 /* ST Datagram Mode */
+#define IP_VERSION_NUM_INET6 6 /* IP6 (IP version 6) */
+#define IP_VERSION_NUM_TPIX 7 /* TP/IX: The Next Internet */
+#define IP_VERSION_NUM_PIP 8 /* The P Internet Protocol */
+#define IP_VERSION_NUM_TUBA 9 /* TUBA */
+
+extern const value_string ip_version_vals[];
+
+typedef struct _ws_ip4
+{
+ guint8 ip_ver; /* 4 */
+ guint8 ip_tos; /* type of service */
+ guint32 ip_len; /* total length */
+ guint16 ip_id; /* identification */
+ guint16 ip_off; /* fragment offset */
+ guint8 ip_ttl; /* time-to-live */
+ guint8 ip_proto; /* protocol */
+ guint16 ip_sum; /* checksum */
+ address ip_src; /* source address */
+ address ip_dst; /* destination address */
+} ws_ip4;
+
+#define WS_IP4_PTR(p) ((ws_ip4 *)(((p) && *(guint8 *)(p) == 4) ? (p) : NULL))
+
+/* Differentiated Services Codepoint */
+#define IPDSFIELD_DSCP_MASK 0xFC
+#define IPDSFIELD_DSCP(dsfield) (((dsfield) & IPDSFIELD_DSCP_MASK) >> 2)
+
+/* Explicit Congestion Notification */
+#define IPDSFIELD_ECN_MASK 0x03
+#define IPDSFIELD_ECN(dsfield) ((dsfield) & IPDSFIELD_ECN_MASK)
+
+gboolean ip_try_dissect(gboolean heur_first, guint nxt, tvbuff_t *tvb,
+ packet_info *pinfo, proto_tree *tree, void *iph);
+
+/* Export the DSCP/ECN extended value-string table for other protocols */
+WS_DLL_PUBLIC value_string_ext dscp_vals_ext;
+WS_DLL_PUBLIC value_string_ext ecn_vals_ext;
+WS_DLL_PUBLIC value_string_ext dscp_short_vals_ext;
+WS_DLL_PUBLIC value_string_ext ecn_short_vals_ext;
+
+typedef struct _ws_ip6
+{
+ guint8 ip6_ver; /* 6 */
+ guint8 ip6_tc; /* traffic class */
+ guint32 ip6_flw; /* flow label */
+ guint32 ip6_len; /* payload length */
+ guint8 ip6_nxt; /* next header */
+ guint8 ip6_hop; /* hop limit */
+ address ip6_src; /* source address */
+ address ip6_dst; /* destination address */
+} ws_ip6;
+
+#define WS_IP6_PTR(p) ((ws_ip6 *)(((p) && *(guint8 *)(p) == 6) ? (p) : NULL))
+
+struct ws_rthdr {
+ struct ip6_rthdr hdr;
+ proto_item *ti_len;
+ proto_item *ti_type;
+ proto_item *ti_segleft;
+};
+
+typedef ws_ip6 ipv6_tap_info_t;
+
+/* Packet info for shared state between IPv6 header and extensions.
+ *
+ * frag_plen: This is the IPv6 header payload length of a fragment packet
+ * minus per-fragment *extension* headers (anything up to and including the
+ * Fragment extension header).
+ *
+ * See RFC 8200 Section 4.5:
+ * The Per-Fragment headers must consist of the IPv6 header plus any
+ * extension headers that must be processed by nodes en route to the
+ * destination, that is, all headers up to and including the Routing
+ * header if present, else the Hop-by-Hop Options header if present,
+ * else no extension headers.
+ */
+typedef struct {
+ guint32 jumbo_plen;
+ guint16 ip6_plen; /* header payload length (can be zero) */
+ gint frag_plen;
+ proto_tree *ipv6_tree;
+ gint ipv6_item_len;
+} ipv6_pinfo_t;
+
+ipv6_pinfo_t *p_get_ipv6_pinfo(packet_info *pinfo);
+
+proto_tree *p_ipv6_pinfo_select_root(packet_info *pinfo, proto_tree *tree);
+
+ipv6_pinfo_t *p_ipv6_pinfo_add_len(packet_info *pinfo, int exthdr_len);
+
+void ipv6_dissect_next(guint nxt, tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ws_ip6 *iph);
+
+static inline int
+ws_ip_protocol(void *iph)
{
- guint8 ip_v_hl; /* combines ip_v and ip_hl */
- guint8 ip_tos;
- guint16 ip_len;
- guint16 ip_id;
- guint16 ip_off;
- guint8 ip_ttl;
- guint8 ip_p;
- guint16 ip_sum;
- address ip_src;
- address ip_dst;
-} ws_ip;
-
-void capture_ip(const guchar *, int, int, packet_counts *);
-guint16 ip_checksum(const guint8 *ptr, int len);
-
-/* Export the DSCP extended value-string table for other protocols */
-WS_VAR_IMPORT value_string_ext dscp_vals_ext;
-
-#endif
+ ws_ip4 *ip4;
+ ws_ip6 *ip6;
+
+ if (iph != NULL) {
+ if ((ip4 = WS_IP4_PTR(iph)) != NULL)
+ return ip4->ip_proto;
+ if ((ip6 = WS_IP6_PTR(iph)) != NULL)
+ return ip6->ip6_nxt;
+ }
+ return -1;
+}
+
+#endif /* __PACKET_IP_H__ */
+
+/*
+ * Editor modelines - http://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */
git.samba.org / metze / wireshark / wip.git / blobdiff