146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/* packet-ip.h
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* Definitions for IP packet disassembly structures and routines
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __PACKET_IP_H__
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#define __PACKET_IP_H__
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#include "ws_symbol_export.h"
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/*
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* IP Version numbers, from
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*
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* https://www.iana.org/assignments/version-numbers/version-numbers.xhtml
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*/
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#define IP_VERSION_NUM_RESERVED 0 /* Reserved */
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#define IP_VERSION_NUM_INET 4 /* IP (IP version 4) */
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#define IP_VERSION_NUM_ST 5 /* ST Datagram Mode */
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#define IP_VERSION_NUM_INET6 6 /* IP6 (IP version 6) */
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#define IP_VERSION_NUM_TPIX 7 /* TP/IX: The Next Internet */
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#define IP_VERSION_NUM_PIP 8 /* The P Internet Protocol */
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#define IP_VERSION_NUM_TUBA 9 /* TUBA */
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extern const value_string ip_version_vals[];
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typedef struct _ws_ip4
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{
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guint8 ip_ver; /* 4 */
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guint8 ip_tos; /* type of service */
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guint32 ip_len; /* total length */
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guint16 ip_id; /* identification */
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guint16 ip_off; /* fragment offset */
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guint8 ip_ttl; /* time-to-live */
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guint8 ip_proto; /* protocol */
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guint16 ip_sum; /* checksum */
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address ip_src; /* source address */
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address ip_dst; /* destination address */
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} ws_ip4;
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#define WS_IP4_PTR(p) ((ws_ip4 *)(((p) && *(guint8 *)(p) == 4) ? (p) : NULL))
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/* Differentiated Services Codepoint */
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#define IPDSFIELD_DSCP_MASK 0xFC
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#define IPDSFIELD_DSCP(dsfield) (((dsfield) & IPDSFIELD_DSCP_MASK) >> 2)
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/* Explicit Congestion Notification */
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#define IPDSFIELD_ECN_MASK 0x03
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#define IPDSFIELD_ECN(dsfield) ((dsfield) & IPDSFIELD_ECN_MASK)
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gboolean ip_try_dissect(gboolean heur_first, guint nxt, tvbuff_t *tvb,
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packet_info *pinfo, proto_tree *tree, void *iph);
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/* Export the DSCP/ECN extended value-string table for other protocols */
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WS_DLL_PUBLIC value_string_ext dscp_vals_ext;
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WS_DLL_PUBLIC value_string_ext ecn_vals_ext;
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WS_DLL_PUBLIC value_string_ext dscp_short_vals_ext;
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WS_DLL_PUBLIC value_string_ext ecn_short_vals_ext;
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typedef struct _ws_ip6
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{
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guint8 ip6_ver; /* 6 */
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guint8 ip6_tc; /* traffic class */
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guint32 ip6_flw; /* flow label */
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guint32 ip6_len; /* payload length */
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guint8 ip6_nxt; /* next header */
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guint8 ip6_hop; /* hop limit */
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address ip6_src; /* source address */
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address ip6_dst; /* destination address */
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} ws_ip6;
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#define WS_IP6_PTR(p) ((ws_ip6 *)(((p) && *(guint8 *)(p) == 6) ? (p) : NULL))
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struct ws_rthdr {
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struct ip6_rthdr hdr;
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proto_item *ti_len;
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proto_item *ti_type;
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proto_item *ti_segleft;
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};
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typedef ws_ip6 ipv6_tap_info_t;
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/* Packet info for shared state between IPv6 header and extensions.
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*
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* frag_plen: This is the IPv6 header payload length of a fragment packet
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* minus per-fragment *extension* headers (anything up to and including the
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* Fragment extension header).
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*
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* See RFC 8200 Section 4.5:
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* The Per-Fragment headers must consist of the IPv6 header plus any
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* extension headers that must be processed by nodes en route to the
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* destination, that is, all headers up to and including the Routing
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* header if present, else the Hop-by-Hop Options header if present,
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* else no extension headers.
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*/
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typedef struct {
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guint32 jumbo_plen;
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guint16 ip6_plen; /* header payload length (can be zero) */
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gint frag_plen;
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proto_tree *ipv6_tree;
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gint ipv6_item_len;
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} ipv6_pinfo_t;
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ipv6_pinfo_t *p_get_ipv6_pinfo(packet_info *pinfo);
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proto_tree *p_ipv6_pinfo_select_root(packet_info *pinfo, proto_tree *tree);
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ipv6_pinfo_t *p_ipv6_pinfo_add_len(packet_info *pinfo, int exthdr_len);
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void ipv6_dissect_next(guint nxt, tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ws_ip6 *iph);
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static inline int
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ws_ip_protocol(void *iph)
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{
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ws_ip4 *ip4;
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ws_ip6 *ip6;
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if (iph != NULL) {
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if ((ip4 = WS_IP4_PTR(iph)) != NULL)
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return ip4->ip_proto;
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if ((ip6 = WS_IP6_PTR(iph)) != NULL)
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return ip6->ip6_nxt;
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}
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return -1;
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}
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#endif /* __PACKET_IP_H__ */
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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