/* packet-user_encap.c * Allow users to specify the dissectors for USERn DLTs * Luis E. Garcia Ontanon * * $Id$ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 * * * 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. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include typedef void (*encap_dissector_t)(tvbuff_t*,packet_info*,proto_tree*,dissector_handle_t); typedef struct _user_encap_t { gchar* name; gchar* abbr; gchar* long_name; gchar* payload; gchar* header; gchar* trailer; guint header_size; guint trailer_size; int hfid; gint encap; encap_dissector_t encap_dissector; dissector_t dissector; module_t* module; dissector_handle_t handle; dissector_handle_t payload_handle; dissector_handle_t header_handle; dissector_handle_t trailer_handle; } user_encap_t; static const enum_val_t encap_types[] = { { "None", "No encpsulation", 0 }, { "SSCOP" , "SSCOP", 1 }, { NULL, NULL, 0 } }; static const encap_dissector_t encap_dissectors[] = { NULL, dissect_sscop_and_payload }; static void dissect_user(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree,guint id); static void dissect_user0(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,0); } static void dissect_user1(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,1); } static void dissect_user2(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,2); } static void dissect_user3(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,3); } static void dissect_user4(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,4); } static void dissect_user5(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,5); } static void dissect_user6(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,6); } static void dissect_user7(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,7); } static void dissect_user8(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,8); } static void dissect_user9(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,9); } static void dissect_user10(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,10); } static void dissect_user11(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,11); } static void dissect_user12(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,12); } static void dissect_user13(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,13); } static void dissect_user14(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,14); } static void dissect_user15(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree) { dissect_user(tvb,pinfo,tree,15); } user_encap_t encaps[] = { {"USER0","user0","DLT_USER00","","","",0,0,-1,0,NULL,dissect_user0,NULL,NULL,NULL,NULL,NULL}, {"USER1","user1","DLT_USER01","","","",0,0,-1,0,NULL,dissect_user1,NULL,NULL,NULL,NULL,NULL}, {"USER2","user2","DLT_USER02","","","",0,0,-1,0,NULL,dissect_user2,NULL,NULL,NULL,NULL,NULL}, {"USER3","user3","DLT_USER03","","","",0,0,-1,0,NULL,dissect_user3,NULL,NULL,NULL,NULL,NULL}, {"USER4","user4","DLT_USER04","","","",0,0,-1,0,NULL,dissect_user4,NULL,NULL,NULL,NULL,NULL}, {"USER5","user5","DLT_USER05","","","",0,0,-1,0,NULL,dissect_user5,NULL,NULL,NULL,NULL,NULL}, {"USER6","user6","DLT_USER06","","","",0,0,-1,0,NULL,dissect_user6,NULL,NULL,NULL,NULL,NULL}, {"USER7","user7","DLT_USER07","","","",0,0,-1,0,NULL,dissect_user7,NULL,NULL,NULL,NULL,NULL}, {"USER8","user8","DLT_USER08","","","",0,0,-1,0,NULL,dissect_user8,NULL,NULL,NULL,NULL,NULL}, {"USER9","user9","DLT_USER09","","","",0,0,-1,0,NULL,dissect_user9,NULL,NULL,NULL,NULL,NULL}, {"USER10","user10","DLT_USER10","","","",0,0,-1,0,NULL,dissect_user10,NULL,NULL,NULL,NULL,NULL}, {"USER11","user11","DLT_USER11","","","",0,0,-1,0,NULL,dissect_user11,NULL,NULL,NULL,NULL,NULL}, {"USER12","user12","DLT_USER12","","","",0,0,-1,0,NULL,dissect_user12,NULL,NULL,NULL,NULL,NULL}, {"USER13","user13","DLT_USER13","","","",0,0,-1,0,NULL,dissect_user13,NULL,NULL,NULL,NULL,NULL}, {"USER14","user14","DLT_USER14","","","",0,0,-1,0,NULL,dissect_user14,NULL,NULL,NULL,NULL,NULL}, {"USER15","user15","DLT_USER15","","","",0,0,-1,0,NULL,dissect_user15,NULL,NULL,NULL,NULL,NULL}, }; static void dissect_user(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree,guint id) { user_encap_t* encap = &(encaps[id]); tvbuff_t* payload_tvb; int offset = 0; int len = tvb_reported_length(tvb) - (encap->header_size + encap->trailer_size); if (encap->encap_dissector) { encap->encap_dissector(tvb,pinfo,tree,encap->payload_handle); return; } if (encap->header_size) { tvbuff_t* hdr_tvb = tvb_new_subset(tvb, 0, encap->header_size, encap->header_size); call_dissector(encap->header_handle, hdr_tvb, pinfo, tree); offset = encap->header_size; } payload_tvb = tvb_new_subset(tvb, encap->header_size, len, len); call_dissector(encap->payload_handle, payload_tvb, pinfo, tree); if (encap->trailer_size) { tvbuff_t* trailer_tvb = tvb_new_subset(tvb, encap->header_size + len, encap->trailer_size, encap->trailer_size); call_dissector(encap->trailer_handle, trailer_tvb, pinfo, tree); offset = encap->trailer_size; } } void proto_reg_handoff_user_encap(void) { int i; static dissector_handle_t data_handle; data_handle = find_dissector("data"); for (i = 0; i < 16; i++) { encaps[i].handle = find_dissector(encaps[i].abbr); dissector_add("wtap_encap", WTAP_ENCAP_USER0 + i, encaps[i].handle); if(*(encaps[i].payload) != '\0') { encaps[i].payload_handle = find_dissector(encaps[i].payload); if (encaps[i].payload_handle == NULL) { encaps[i].payload_handle = data_handle; report_failure("%s: No such proto: %s",encaps[i].long_name,encaps[i].payload); } } else { encaps[i].payload_handle = data_handle; } if(*(encaps[i].header) != '\0') { encaps[i].header_handle = find_dissector(encaps[i].header); if (encaps[i].header_handle == NULL) { encaps[i].header_handle = data_handle; report_failure("%s: No such proto: %s",encaps[i].long_name,encaps[i].header); } } else { encaps[i].header_handle = data_handle; } if(*(encaps[i].trailer) != '\0') { encaps[i].trailer_handle = find_dissector(encaps[i].trailer); if (encaps[i].trailer_handle == NULL) { encaps[i].trailer_handle = data_handle; report_failure("%s: No such proto: %s",encaps[i].long_name,encaps[i].trailer); } } else { encaps[i].trailer_handle = data_handle; } encaps[i].encap_dissector = encap_dissectors[encaps[i].encap]; } } void proto_register_user_encap(void) { int i; for (i = 0; i < 16; i++) { encaps[i].hfid = proto_register_protocol(encaps[i].name, encaps[i].long_name, encaps[i].abbr); encaps[i].module = prefs_register_protocol(encaps[i].hfid, proto_reg_handoff_user_encap); prefs_register_string_preference(encaps[i].module, "payload","Payload", "Payload", &encaps[i].payload); prefs_register_enum_preference(encaps[i].module, "encap","Encapsulation", "The encapsulation used", &encaps[i].encap, encap_types, FALSE); prefs_register_uint_preference(encaps[i].module, "header_size","Header Size", "The size (in bytes) of the Header (0 if none)", 10, &encaps[i].header_size); prefs_register_uint_preference(encaps[i].module, "trailer_size","Trailer Size", "The size (in bytes) of the Trailer (0 if none)", 10, &encaps[i].trailer_size); prefs_register_string_preference(encaps[i].module, "header_proto","Header Protocol", "Header Protocol (used only when ecapsulation is not given)", &encaps[i].header); prefs_register_string_preference(encaps[i].module, "trailer_proto","Trailer Protocol", "Trailer Protocol (used only when ecapsulation is not given)", &encaps[i].trailer); register_dissector(encaps[i].abbr, encaps[i].dissector, encaps[i].hfid); } }