forked from osmocom/wireshark
![Alexis La Goutte](/assets/img/avatar_default.png)
Bug: 14506 Change-Id: I399f3a94583985a5d036ac26438e0c5bc5a70c85 Reviewed-on: https://code.wireshark.org/review/10626 Reviewed-by: Peter Wu <peter@lekensteyn.nl> Petri-Dish: Peter Wu <peter@lekensteyn.nl> Tested-by: Petri Dish Buildbot Reviewed-by: Anders Broman <a.broman58@gmail.com>
469 lines
16 KiB
C
469 lines
16 KiB
C
/* packet-proxy.c
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* Routines for PROXY(v2) dissection
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* Copyright 2015, Alexis La Goutte (See AUTHORS)
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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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/*
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* https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt
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*/
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#include <config.h>
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#include <epan/packet.h>
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#include <epan/expert.h>
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void proto_reg_handoff_proxy(void);
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void proto_register_proxy(void);
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static int proto_proxy = -1;
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static int hf_proxy_version = -1;
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/* V2 */
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static int hf_proxy2_magic = -1;
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static int hf_proxy2_ver = -1;
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static int hf_proxy2_cmd = -1;
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static int hf_proxy2_addr_family = -1;
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static int hf_proxy2_protocol = -1;
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static int hf_proxy2_addr_family_protocol = -1;
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static int hf_proxy2_len = -1;
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static int hf_proxy2_src_addr_ipv4 = -1;
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static int hf_proxy2_dst_addr_ipv4 = -1;
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static int hf_proxy2_src_addr_ipv6 = -1;
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static int hf_proxy2_dst_addr_ipv6 = -1;
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static int hf_proxy2_src_port = -1;
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static int hf_proxy2_dst_port = -1;
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static int hf_proxy2_src_addr_unix = -1;
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static int hf_proxy2_dst_addr_unix = -1;
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static int hf_proxy2_unknown = -1;
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static int hf_proxy2_tlv = -1;
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static int hf_proxy2_tlv_type = -1;
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static int hf_proxy2_tlv_length = -1;
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static int hf_proxy2_tlv_value = -1;
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static int hf_proxy2_tlv_ssl_client = -1;
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static int hf_proxy2_tlv_ssl_verify = -1;
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static int hf_proxy2_tlv_ssl_version = -1;
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static int hf_proxy2_tlv_ssl_cn = -1;
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static int hf_proxy2_tlv_ssl_cipher = -1;
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static int hf_proxy2_tlv_ssl_sig_alg = -1;
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static int hf_proxy2_tlv_ssl_key_alg = -1;
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static expert_field ei_proxy_header_length_too_small = EI_INIT;
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static gint ett_proxy2 = -1;
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static gint ett_proxy2_fampro = -1;
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static gint ett_proxy2_tlv = -1;
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static const guint8 proxy_v2_magic[] = { 0x0d, 0x0a, 0x0d, 0x0a, 0x00, 0x0d, 0x0a, 0x51, 0x55, 0x49, 0x54, 0x0a };
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static const value_string proxy2_family_protocol_vals[] = {
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{ 0x00, "UNSPEC" },
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{ 0x11, "TCP over IPv4" },
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{ 0x12, "UDP over IPv4" },
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{ 0x21, "TCP over IPv6" },
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{ 0x22, "UDP over IPv6" },
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{ 0x31, "UNIX stream" },
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{ 0x32, "UNIX datagram" },
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{ 0, NULL }
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};
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static const value_string proxy2_family_vals[] = {
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{ 0x1, "IPv4" },
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{ 0x2, "IPv6" },
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{ 0x3, "UNIX" },
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{ 0, NULL }
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};
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#define PP2_TYPE_ALPN 0x01
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#define PP2_TYPE_AUTHORITY 0x02
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#define PP2_TYPE_CRC32C 0x03
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#define PP2_TYPE_NOOP 0x04
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#define PP2_TYPE_SSL 0x20
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#define PP2_SUBTYPE_SSL_VERSION 0x21
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#define PP2_SUBTYPE_SSL_CN 0x22
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#define PP2_SUBTYPE_SSL_CIPHER 0x23
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#define PP2_SUBTYPE_SSL_SIG_ALG 0x24
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#define PP2_SUBTYPE_SSL_KEY_ALG 0x25
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#define PP2_TYPE_NETNS 0x30
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static const value_string proxy2_tlv_vals[] = {
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{ 0x00, "UNSPEC" },
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{ PP2_TYPE_ALPN, "ALPN" },
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{ PP2_TYPE_AUTHORITY, "AUTHORITY" },
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{ PP2_TYPE_CRC32C, "CRC32C" },
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{ PP2_TYPE_NOOP, "NOOP" },
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{ PP2_TYPE_SSL, "SSL" },
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{ PP2_SUBTYPE_SSL_VERSION, "SSL VERSION" },
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{ PP2_SUBTYPE_SSL_CN, "SSL CN" },
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{ PP2_SUBTYPE_SSL_CIPHER, "SSL CIPHER" },
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{ PP2_SUBTYPE_SSL_SIG_ALG, "SSL SIG ALG" },
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{ PP2_SUBTYPE_SSL_KEY_ALG, "SSL KEY ALG" },
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{ PP2_TYPE_NETNS, "NETNS" },
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{ 0, NULL }
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};
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static int
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dissect_proxy_v2_tlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *proxy_tree, int offset)
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{
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while ( tvb_reported_length_remaining(tvb, offset) > 0) {
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guint32 type, length;
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proto_item *ti_tlv;
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proto_tree *tlv_tree;
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ti_tlv = proto_tree_add_item(proxy_tree, hf_proxy2_tlv, tvb, offset, 3, ENC_NA);
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tlv_tree = proto_item_add_subtree(ti_tlv, ett_proxy2_tlv);
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proto_tree_add_item_ret_uint(tlv_tree, hf_proxy2_tlv_type, tvb, offset, 1, ENC_NA, &type);
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offset += 1;
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proto_tree_add_item_ret_uint(tlv_tree, hf_proxy2_tlv_length, tvb, offset, 2, ENC_BIG_ENDIAN, &length);
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offset += 2;
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proto_item_append_text(ti_tlv, ": (t=%u,l=%d) %s", type, length, val_to_str(type, proxy2_tlv_vals ,"Unknown type") );
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proto_item_set_len(ti_tlv, 1 + 2 + length);
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proto_tree_add_item(tlv_tree, hf_proxy2_tlv_value, tvb, offset, length, ENC_NA);
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switch (type) {
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case PP2_TYPE_SSL: /* SSL */
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proto_tree_add_item(tlv_tree, hf_proxy2_tlv_ssl_client, tvb, offset, 1, ENC_NA);
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offset += 1;
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proto_tree_add_item(tlv_tree, hf_proxy2_tlv_ssl_verify, tvb, offset, 4, ENC_NA);
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offset += 4;
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offset = dissect_proxy_v2_tlv(tvb, pinfo, tlv_tree, offset);
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break;
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case PP2_SUBTYPE_SSL_VERSION: /* SSL Version */
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proto_tree_add_item(tlv_tree, hf_proxy2_tlv_ssl_version, tvb, offset, length, ENC_ASCII|ENC_NA);
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proto_item_append_text(ti_tlv, ": %s", tvb_get_string_enc(wmem_packet_scope(), tvb, offset, length, ENC_ASCII));
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offset += length;
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break;
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case PP2_SUBTYPE_SSL_CN: /* SSL CommonName */
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proto_tree_add_item(tlv_tree, hf_proxy2_tlv_ssl_cn, tvb, offset, length, ENC_ASCII|ENC_NA);
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proto_item_append_text(ti_tlv, ": %s", tvb_get_string_enc(wmem_packet_scope(), tvb, offset, length, ENC_ASCII));
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offset += length;
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break;
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case PP2_SUBTYPE_SSL_CIPHER: /* SSL Cipher */
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proto_tree_add_item(tlv_tree, hf_proxy2_tlv_ssl_cipher, tvb, offset, length, ENC_ASCII|ENC_NA);
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offset += length;
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break;
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case PP2_SUBTYPE_SSL_SIG_ALG: /* SSL Signature Algorithm */
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proto_tree_add_item(tlv_tree, hf_proxy2_tlv_ssl_sig_alg, tvb, offset, length, ENC_ASCII|ENC_NA);
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offset += length;
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break;
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case PP2_SUBTYPE_SSL_KEY_ALG: /* SSL Key Algorithm */
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proto_tree_add_item(tlv_tree, hf_proxy2_tlv_ssl_key_alg, tvb, offset, length, ENC_ASCII|ENC_NA);
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offset += length;
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break;
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default:
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offset += length;
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break;
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}
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}
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return offset;
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}
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static int
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dissect_proxy_v2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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void *data _U_)
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{
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proto_item *ti , *ti_ver;
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proto_tree *proxy_tree, *fampro_tree;
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guint offset = 0, next_offset;
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guint32 header_len, fam_pro;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "PROXYv2");
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ti = proto_tree_add_item(tree, proto_proxy, tvb, 0, -1, ENC_NA);
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proxy_tree = proto_item_add_subtree(ti, ett_proxy2);
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proto_tree_add_item(proxy_tree, hf_proxy2_magic, tvb, offset, 12, ENC_NA);
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offset += 12;
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proto_tree_add_item(proxy_tree, hf_proxy2_ver, tvb, offset, 1, ENC_NA);
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proto_tree_add_item(proxy_tree, hf_proxy2_cmd, tvb, offset, 1, ENC_NA);
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ti_ver = proto_tree_add_uint(proxy_tree, hf_proxy_version, tvb, offset, 1, 2);
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PROTO_ITEM_SET_GENERATED(ti_ver);
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offset += 1;
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ti = proto_tree_add_item_ret_uint(proxy_tree, hf_proxy2_addr_family_protocol, tvb, offset, 1, ENC_NA, &fam_pro);
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fampro_tree = proto_item_add_subtree(ti, ett_proxy2_fampro);
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proto_tree_add_item(fampro_tree, hf_proxy2_addr_family, tvb, offset, 1, ENC_NA);
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proto_tree_add_item(fampro_tree, hf_proxy2_protocol, tvb, offset, 1, ENC_NA);
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offset += 1;
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proto_tree_add_item_ret_uint(proxy_tree, hf_proxy2_len, tvb, offset, 2, ENC_BIG_ENDIAN, &header_len);
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offset += 2;
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next_offset = offset + header_len;
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switch (fam_pro){
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case 0x11: /* TCP over IPv4 */
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case 0x12: /* UDP over IPv4 */
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proto_tree_add_item(proxy_tree, hf_proxy2_src_addr_ipv4, tvb, offset, 4, ENC_NA);
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offset += 4;
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proto_tree_add_item(proxy_tree, hf_proxy2_dst_addr_ipv4, tvb, offset, 4, ENC_NA);
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offset += 4;
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proto_tree_add_item(proxy_tree, hf_proxy2_src_port, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(proxy_tree, hf_proxy2_dst_port, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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break;
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case 0x21: /* TCP over IPv6 */
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case 0x22: /* UDP over IPv6 */
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proto_tree_add_item(proxy_tree, hf_proxy2_src_addr_ipv6, tvb, offset, 16, ENC_NA);
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offset += 16;
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proto_tree_add_item(proxy_tree, hf_proxy2_dst_addr_ipv6, tvb, offset, 16, ENC_NA);
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offset += 16;
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proto_tree_add_item(proxy_tree, hf_proxy2_src_port, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(proxy_tree, hf_proxy2_dst_port, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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break;
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case 0x31: /* UNIX stream */
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case 0x32: /* UNIX datagram */
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proto_tree_add_item(proxy_tree, hf_proxy2_src_addr_unix, tvb, offset, 108, ENC_NA);
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offset += 108;
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proto_tree_add_item(proxy_tree, hf_proxy2_dst_addr_unix, tvb, offset, 108, ENC_NA);
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offset += 108;
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break;
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default:
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proto_tree_add_item(proxy_tree, hf_proxy2_unknown, tvb, offset, header_len, ENC_NA);
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offset += header_len;
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break;
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}
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if (offset > next_offset) {
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proto_tree_add_expert(proxy_tree, pinfo, &ei_proxy_header_length_too_small,
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tvb, offset, -1);
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return offset;
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}
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if (offset < header_len) {
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/* TLV */
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offset = dissect_proxy_v2_tlv(tvb, pinfo, proxy_tree, offset);
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}
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return offset;
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}
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static gboolean
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dissect_proxy_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
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{
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guint length = tvb_reported_length(tvb);
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if (length >= 16 && tvb_memeql(tvb, 0, proxy_v2_magic, sizeof(proxy_v2_magic)) == 0) {
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// TODO maybe check for "(hdr.v2.ver_cmd & 0xF0) == 0x20" as done in "9. Sample code" from
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// https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt?
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dissect_proxy_v2(tvb, pinfo, tree, data);
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return TRUE;
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}
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return FALSE;
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}
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void
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proto_register_proxy(void)
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{
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expert_module_t *expert_proxy;
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static hf_register_info hf[] = {
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{ &hf_proxy_version,
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{ "Version", "proxy.version",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_magic,
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{ "Magic", "proxy.v2.magic",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_ver,
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{ "Version", "proxy.v2.version",
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FT_UINT8, BASE_DEC, NULL, 0xF0,
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NULL, HFILL }
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},
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{ &hf_proxy2_cmd,
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{ "Command", "proxy.v2.cmd",
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FT_UINT8, BASE_DEC, NULL, 0x0F,
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NULL, HFILL }
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},
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{ &hf_proxy2_addr_family_protocol,
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{ "Address Family Protocol", "proxy.v2.addr_family_protocol",
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FT_UINT8, BASE_HEX, VALS(proxy2_family_protocol_vals), 0x00,
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NULL, HFILL }
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},
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{ &hf_proxy2_addr_family,
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{ "Address Family", "proxy.v2.addr_family",
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FT_UINT8, BASE_HEX, VALS(proxy2_family_vals), 0xF0,
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NULL, HFILL }
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},
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{ &hf_proxy2_protocol,
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{ "Protocol", "proxy.v2.protocol",
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FT_UINT8, BASE_HEX, NULL, 0x0F,
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NULL, HFILL }
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},
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{ &hf_proxy2_len,
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{ "Length", "proxy.v2.length",
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FT_UINT16, BASE_DEC, NULL, 0x00,
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"Size of addresses and additional properties", HFILL }
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},
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{ &hf_proxy2_src_addr_ipv4,
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{ "Source Address (IPv4)", "proxy.v2.src_addr_ipv4",
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FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_dst_addr_ipv4,
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{ "Destination Address (IPv4)", "proxy.v2.dst_addr_ipv4",
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FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_src_addr_ipv6,
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{ "Source Address (IPv6)", "proxy.v2.src_addr_ipv6",
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FT_IPv6, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_dst_addr_ipv6,
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{ "Destination Address (IPv6)", "proxy.v2.dst_addr_ipv6",
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FT_IPv6, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_src_port,
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{ "Source Port", "proxy.v2.src_port",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_dst_port,
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{ "Destination Port", "proxy.v2.dst_port",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_src_addr_unix,
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{ "Source Address (UNIX)", "proxy.v2.src_addr_unix",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_dst_addr_unix,
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{ "Destination Address (UNIX)", "proxy.v2.dst_addr_unix",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_unknown,
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{ "Unknown data", "proxy.v2.unknown",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_tlv,
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{ "TLV", "proxy.v2.tlv",
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FT_NONE, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_tlv_type,
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{ "Type", "proxy.v2.tlv.type",
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FT_UINT8, BASE_HEX, VALS(proxy2_tlv_vals), 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_tlv_length,
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{ "Length", "proxy.v2.tlv.length",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_tlv_value,
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{ "Value", "proxy.v2.tlv.value",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_tlv_ssl_client,
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{ "Client", "proxy.v2.tlv.ssl.client",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_tlv_ssl_verify,
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{ "Verify", "proxy.v2.tlv.ssl.verify",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_tlv_ssl_version,
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{ "Version", "proxy.v2.tlv.ssl.version",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_proxy2_tlv_ssl_cn,
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{ "CN", "proxy.v2.tlv.ssl.cn",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"CommonName", HFILL }
|
|
},
|
|
{ &hf_proxy2_tlv_ssl_cipher,
|
|
{ "Cipher", "proxy.v2.tlv.ssl.cipher",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_proxy2_tlv_ssl_sig_alg,
|
|
{ "SIG ALG", "proxy.v2.tlv.ssl.sig_alg",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Signature Algorithm", HFILL }
|
|
},
|
|
{ &hf_proxy2_tlv_ssl_key_alg,
|
|
{ "Key ALG", "proxy.v2.tlv.ssl.keu_alg",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Key Algorithm", HFILL }
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_proxy2,
|
|
&ett_proxy2_fampro,
|
|
&ett_proxy2_tlv,
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_proxy_header_length_too_small,
|
|
{ "proxy.header.length_too_small", PI_MALFORMED, PI_WARN,
|
|
"Header length is too small", EXPFILL }
|
|
}
|
|
};
|
|
|
|
proto_proxy = proto_register_protocol("PROXY Protocol", "PROXY", "proxy");
|
|
|
|
proto_register_field_array(proto_proxy, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
expert_proxy = expert_register_protocol(proto_proxy);
|
|
expert_register_field_array(expert_proxy, ei, array_length(ei));
|
|
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_proxy(void)
|
|
{
|
|
heur_dissector_add("tcp", dissect_proxy_heur, "proxy", "proxy_tcp", proto_proxy, HEURISTIC_ENABLE);
|
|
heur_dissector_add("udp", dissect_proxy_heur, "proxy", "proxy_udp", proto_proxy, HEURISTIC_ENABLE);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://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:
|
|
*/
|