forked from osmocom/wireshark
167 lines
4.8 KiB
C
167 lines
4.8 KiB
C
/* export_object.c
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* GUI independent helper routines common to all export object taps.
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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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#include "config.h"
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#include <string.h>
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#include "proto.h"
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#include "packet_info.h"
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#include "export_object.h"
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struct register_eo {
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int proto_id; /* protocol id (0-indexed) */
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const char* tap_listen_str; /* string used in register_tap_listener (NULL to use protocol name) */
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tap_packet_cb eo_func; /* function to be called for new incoming packets for SRT */
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export_object_gui_reset_cb reset_cb; /* function to parse parameters of optional arguments of tap string */
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};
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static wmem_tree_t *registered_eo_tables = NULL;
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int
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register_export_object(const int proto_id, tap_packet_cb export_packet_func, export_object_gui_reset_cb reset_cb)
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{
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register_eo_t *table;
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DISSECTOR_ASSERT(export_packet_func);
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table = wmem_new(wmem_epan_scope(), register_eo_t);
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table->proto_id = proto_id;
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table->tap_listen_str = wmem_strdup_printf(wmem_epan_scope(), "%s_eo", proto_get_protocol_filter_name(proto_id));
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table->eo_func = export_packet_func;
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table->reset_cb = reset_cb;
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if (registered_eo_tables == NULL)
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registered_eo_tables = wmem_tree_new(wmem_epan_scope());
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wmem_tree_insert_string(registered_eo_tables, proto_get_protocol_filter_name(proto_id), table, 0);
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return register_tap(table->tap_listen_str);
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}
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int get_eo_proto_id(register_eo_t* eo)
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{
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if (!eo) {
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return -1;
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}
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return eo->proto_id;
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}
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const char* get_eo_tap_listener_name(register_eo_t* eo)
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{
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return eo->tap_listen_str;
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}
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tap_packet_cb get_eo_packet_func(register_eo_t* eo)
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{
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return eo->eo_func;
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}
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export_object_gui_reset_cb get_eo_reset_func(register_eo_t* eo)
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{
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return eo->reset_cb;
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}
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register_eo_t* get_eo_by_name(const char* name)
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{
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return (register_eo_t*)wmem_tree_lookup_string(registered_eo_tables, name, 0);
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}
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void eo_iterate_tables(wmem_foreach_func func, gpointer user_data)
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{
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wmem_tree_foreach(registered_eo_tables, func, user_data);
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}
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static GString *eo_rename(GString *gstr, gsize maxlen, int dupn)
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{
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GString *gstr_tmp;
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gchar *tmp_ptr;
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GString *ext_str;
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gstr_tmp = g_string_new("");
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if (dupn != 0) {
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g_string_append_printf (gstr_tmp, "(%d)", dupn);
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}
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if ( (tmp_ptr = strrchr(gstr->str, '.')) != NULL && ((ext_str = g_string_new(tmp_ptr))->len + strlen(gstr_tmp->str) < maxlen) ) {
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/* Retain the extension */
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gstr = g_string_truncate(gstr, gstr->len - ext_str->len);
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if ( gstr->len >= (maxlen - (strlen(gstr_tmp->str) + ext_str->len)) )
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gstr = g_string_truncate(gstr, maxlen - (strlen(gstr_tmp->str) + ext_str->len));
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gstr = g_string_append(gstr, gstr_tmp->str);
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gstr = g_string_append(gstr, ext_str->str);
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g_string_free(ext_str, TRUE);
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}
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else {
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if ( gstr->len >= (maxlen - strlen(gstr_tmp->str)) )
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gstr = g_string_truncate(gstr, maxlen - strlen(gstr_tmp->str));
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gstr = g_string_append(gstr, gstr_tmp->str);
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}
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g_string_free(gstr_tmp, TRUE);
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return gstr;
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}
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GString *
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eo_massage_str(const gchar *in_str, gsize maxlen, int dupn)
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{
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gchar *tmp_ptr;
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/* The characters in "reject" come from:
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* http://msdn.microsoft.com/en-us/library/aa365247%28VS.85%29.aspx.
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* Add to the list as necessary for other OS's.
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*/
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const gchar *reject = "<>:\"/\\|?*"
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"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a"
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"\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14"
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"\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f";
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GString *out_str;
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out_str = g_string_new("");
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/* Find all disallowed characters/bytes and replace them with %xx */
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while ( (tmp_ptr = strpbrk(in_str, reject)) != NULL ) {
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out_str = g_string_append_len(out_str, in_str, tmp_ptr - in_str);
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g_string_append_printf(out_str, "%%%02x", *tmp_ptr);
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in_str = tmp_ptr + 1;
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}
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out_str = g_string_append(out_str, in_str);
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if ( dupn != 0 || out_str->len > maxlen )
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out_str = eo_rename(out_str, maxlen, dupn);
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return out_str;
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}
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const char *
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eo_ct2ext(const char *content_type)
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{
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/* TODO: Map the content type string to an extension string. If no match,
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* return NULL. */
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return content_type;
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}
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void eo_free_entry(export_object_entry_t *entry)
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{
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g_free(entry->hostname);
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g_free(entry->content_type);
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g_free(entry->filename);
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g_free(entry->payload_data);
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g_free(entry);
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}
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/*
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* Editor modelines
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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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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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