/* Neighbor list is of the form: * HID_1 NUM_1 HA_11 HA_12 ... HA_1NUM_1 * HID_2 NUM_2 HA_21 HA_22 ... HA_2NUM_2 * ... * HID_count NUM_count HA_count1 HA_count2 ... HA_countNUM_count * * count == hid_count. */ static void dissect_nwp_nl(tvbuff_t *tvb, proto_tree *nwp_tree, guint8 hid_count, guint8 ha_len) { proto_tree *neigh_list_tree = NULL; proto_tree *neigh_tree = NULL; proto_item *pi = NULL; guint i; guint8 offset = NWPH_NLST; wmem_strbuf_t *hid_buf = wmem_strbuf_sized_new(wmem_packet_scope(), NWP_HID_STR_LEN, NWP_HID_STR_LEN); /* Set up tree for neighbor list. */ pi = proto_tree_add_item(nwp_tree, hf_nwp_neigh_list, tvb, NWPH_NLST, -1, ENC_NA); neigh_list_tree = proto_item_add_subtree(pi, ett_nwp_neigh_list_tree); for (i = 0; i < hid_count; i++) { const gchar *hid_str; guint j; guint8 ha_count = tvb_get_guint8(tvb, offset + NWP_XID_LEN); /* Set up tree for this individual neighbor. */ pi = proto_tree_add_none_format(neigh_list_tree, hf_nwp_neigh, tvb, offset, NWP_XID_LEN + 1 + ha_len * ha_count, "Neighbor %d", i + 1); neigh_tree = proto_item_add_subtree(pi, ett_nwp_neigh_tree); /* Add HID for this neighbor. */ wmem_strbuf_append(hid_buf, "hid-"); add_hid_to_strbuf(tvb, hid_buf, offset); hid_str = wmem_strbuf_get_str(hid_buf); proto_tree_add_string(neigh_tree, hf_nwp_neigh_hid, tvb, offset, NWP_XID_LEN, hid_str); wmem_strbuf_truncate(hid_buf, 0); offset += NWP_XID_LEN; /* Add number of devices this neighbor has. */ proto_tree_add_item(neigh_tree, hf_nwp_neigh_num, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* Add hardware addresses for the neighbor's devices. */ for (j = 0; j < ha_count; j++) proto_tree_add_item(neigh_tree, hf_nwp_neigh_haddr, tvb, offset + (j * ha_len), ha_len, ENC_NA); offset += ha_len * ha_count; } }
static const gchar * format_flags_string(guchar value, const gchar *array[]) { int i; guint bpos; wmem_strbuf_t *buf; const char *sep = ""; buf = wmem_strbuf_sized_new(wmem_packet_scope(), MAX_FLAGS_LEN, MAX_FLAGS_LEN); for (i = 0; i < 8; i++) { bpos = 1 << i; if (value & bpos) { if (array[i][0]) { /* there is a string to emit... */ wmem_strbuf_append_printf(buf, "%s%s", sep, array[i]); sep = ", "; } } } return wmem_strbuf_get_str(buf); }
static void dissect_nwp_ann(tvbuff_t *tvb, proto_tree *nwp_tree, guint8 hid_count, guint8 ha_len) { proto_tree *hid_tree = NULL; proto_item *ti = NULL; wmem_strbuf_t *buf; guint i; guint8 offset; /* Add hardware address. */ proto_tree_add_item(nwp_tree, hf_nwp_ann_haddr, tvb, NWPH_HWAD, ha_len, ENC_NA); /* Add tree for HIDs. */ ti = proto_tree_add_item(nwp_tree, hf_nwp_ann_hids, tvb, NWPH_HWAD + ha_len, hid_count * NWP_XID_LEN, ENC_NA); hid_tree = proto_item_add_subtree(ti, ett_nwp_ann_hid_tree); buf = wmem_strbuf_sized_new(wmem_packet_scope(), NWP_HID_STR_LEN, NWP_HID_STR_LEN); /* Add HIDs. */ offset = NWPH_HWAD + ha_len; for (i = 0; i < hid_count; i++) { const gchar *hid_str; wmem_strbuf_append(buf, "hid-"); add_hid_to_strbuf(tvb, buf, offset); hid_str = wmem_strbuf_get_str(buf); proto_tree_add_string_format(hid_tree, hf_nwp_ann_hid, tvb, offset, NWP_XID_LEN, hid_str, "%s", hid_str); wmem_strbuf_truncate(buf, 0); offset += NWP_XID_LEN; } }
wmem_strbuf_t * wmem_strbuf_new(wmem_allocator_t *allocator, const gchar *str) { wmem_strbuf_t *strbuf; gsize len, alloc_len; len = str ? strlen(str) : 0; alloc_len = DEFAULT_MINIMUM_LEN; /* +1 for the null-terminator */ while (alloc_len < (len + 1)) { alloc_len *= 2; } strbuf = wmem_strbuf_sized_new(allocator, alloc_len, 0); if (str && len > 0) { strcpy(strbuf->str, str); strbuf->len = len; } return strbuf; }
static void wmem_test_strbuf(void) { wmem_allocator_t *allocator; wmem_strbuf_t *strbuf; int i; char *str; allocator = wmem_allocator_new(WMEM_ALLOCATOR_STRICT); strbuf = wmem_strbuf_new(allocator, "TEST"); g_assert(strbuf); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "TEST"); g_assert(wmem_strbuf_get_len(strbuf) == 4); wmem_strbuf_append(strbuf, "FUZZ"); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "TESTFUZZ"); g_assert(wmem_strbuf_get_len(strbuf) == 8); wmem_strbuf_append_printf(strbuf, "%d%s", 3, "a"); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "TESTFUZZ3a"); g_assert(wmem_strbuf_get_len(strbuf) == 10); wmem_strbuf_append_c(strbuf, 'q'); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "TESTFUZZ3aq"); g_assert(wmem_strbuf_get_len(strbuf) == 11); wmem_strbuf_append_unichar(strbuf, g_utf8_get_char("\xC2\xA9")); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "TESTFUZZ3aq\xC2\xA9"); g_assert(wmem_strbuf_get_len(strbuf) == 13); wmem_strbuf_truncate(strbuf, 32); wmem_strbuf_truncate(strbuf, 24); wmem_strbuf_truncate(strbuf, 16); wmem_strbuf_truncate(strbuf, 13); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "TESTFUZZ3aq\xC2\xA9"); g_assert(wmem_strbuf_get_len(strbuf) == 13); wmem_strbuf_truncate(strbuf, 3); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "TES"); g_assert(wmem_strbuf_get_len(strbuf) == 3); strbuf = wmem_strbuf_sized_new(allocator, 10, 10); g_assert(strbuf); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, ""); g_assert(wmem_strbuf_get_len(strbuf) == 0); wmem_strbuf_append(strbuf, "FUZZ"); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "FUZZ"); g_assert(wmem_strbuf_get_len(strbuf) == 4); wmem_strbuf_append_printf(strbuf, "%d%s", 3, "abcdefghijklmnop"); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "FUZZ3abcd"); g_assert(wmem_strbuf_get_len(strbuf) == 9); wmem_strbuf_append(strbuf, "abcdefghijklmnopqrstuvwxyz"); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "FUZZ3abcd"); g_assert(wmem_strbuf_get_len(strbuf) == 9); wmem_strbuf_append_c(strbuf, 'q'); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "FUZZ3abcd"); g_assert(wmem_strbuf_get_len(strbuf) == 9); wmem_strbuf_append_unichar(strbuf, g_utf8_get_char("\xC2\xA9")); g_assert_cmpstr(wmem_strbuf_get_str(strbuf), ==, "FUZZ3abcd"); g_assert(wmem_strbuf_get_len(strbuf) == 9); str = wmem_strbuf_finalize(strbuf); g_assert_cmpstr(str, ==, "FUZZ3abcd"); g_assert(strlen(str) == 9); wmem_free_all(allocator); strbuf = wmem_strbuf_new(allocator, "TEST"); for (i=0; i<1024; i++) { if (g_test_rand_bit()) { wmem_strbuf_append(strbuf, "ABC"); } else { wmem_strbuf_append_printf(strbuf, "%d%d", 3, 777); } wmem_strict_check_canaries(allocator); } g_assert(strlen(wmem_strbuf_get_str(strbuf)) == wmem_strbuf_get_len(strbuf)); wmem_destroy_allocator(allocator); }
static void dissect_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree) { proto_item *volatile ti = NULL, *comment_item; guint cap_len = 0, frame_len = 0; proto_tree *volatile tree; proto_tree *comments_tree; proto_item *item; const gchar *cap_plurality, *frame_plurality; tree=parent_tree; switch (pinfo->phdr->rec_type) { case REC_TYPE_PACKET: pinfo->current_proto = "Frame"; if (pinfo->pseudo_header != NULL) { switch (pinfo->fd->lnk_t) { case WTAP_ENCAP_WFLEET_HDLC: case WTAP_ENCAP_CHDLC_WITH_PHDR: case WTAP_ENCAP_PPP_WITH_PHDR: case WTAP_ENCAP_SDLC: case WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR: pinfo->p2p_dir = pinfo->pseudo_header->p2p.sent ? P2P_DIR_SENT : P2P_DIR_RECV; break; case WTAP_ENCAP_BLUETOOTH_HCI: pinfo->p2p_dir = pinfo->pseudo_header->bthci.sent; break; case WTAP_ENCAP_LAPB: case WTAP_ENCAP_FRELAY_WITH_PHDR: pinfo->p2p_dir = (pinfo->pseudo_header->x25.flags & FROM_DCE) ? P2P_DIR_RECV : P2P_DIR_SENT; break; case WTAP_ENCAP_ISDN: case WTAP_ENCAP_V5_EF: case WTAP_ENCAP_DPNSS: case WTAP_ENCAP_BACNET_MS_TP_WITH_PHDR: pinfo->p2p_dir = pinfo->pseudo_header->isdn.uton ? P2P_DIR_SENT : P2P_DIR_RECV; break; case WTAP_ENCAP_LINUX_LAPD: pinfo->p2p_dir = (pinfo->pseudo_header->lapd.pkttype == 3 || pinfo->pseudo_header->lapd.pkttype == 4) ? P2P_DIR_SENT : P2P_DIR_RECV; break; case WTAP_ENCAP_MTP2_WITH_PHDR: pinfo->p2p_dir = pinfo->pseudo_header->mtp2.sent ? P2P_DIR_SENT : P2P_DIR_RECV; pinfo->link_number = pinfo->pseudo_header->mtp2.link_number; pinfo->annex_a_used = pinfo->pseudo_header->mtp2.annex_a_used; break; case WTAP_ENCAP_GSM_UM: pinfo->p2p_dir = pinfo->pseudo_header->gsm_um.uplink ? P2P_DIR_SENT : P2P_DIR_RECV; break; } } break; case REC_TYPE_FT_SPECIFIC_EVENT: pinfo->current_proto = "Event"; break; case REC_TYPE_FT_SPECIFIC_REPORT: pinfo->current_proto = "Report"; break; default: g_assert_not_reached(); break; } if(pinfo->pkt_comment){ item = proto_tree_add_item(tree, proto_pkt_comment, tvb, 0, 0, ENC_NA); comments_tree = proto_item_add_subtree(item, ett_comments); comment_item = proto_tree_add_string_format(comments_tree, hf_comments_text, tvb, 0, 0, pinfo->pkt_comment, "%s", pinfo->pkt_comment); expert_add_info_format(pinfo, comment_item, &ei_comments_text, "%s", pinfo->pkt_comment); } /* if FRAME is not referenced from any filters we don't need to worry about generating any tree items. */ if(!proto_field_is_referenced(tree, proto_frame)) { tree=NULL; if(pinfo->fd->flags.has_ts) { if(pinfo->fd->abs_ts.nsecs < 0 || pinfo->fd->abs_ts.nsecs >= 1000000000) expert_add_info(pinfo, NULL, &ei_arrive_time_out_of_range); } } else { proto_tree *fh_tree; gboolean old_visible; /* Put in frame header information. */ cap_len = tvb_length(tvb); frame_len = tvb_reported_length(tvb); cap_plurality = plurality(cap_len, "", "s"); frame_plurality = plurality(frame_len, "", "s"); ti = proto_tree_add_protocol_format(tree, proto_frame, tvb, 0, tvb_captured_length(tvb), "Frame %u: %u byte%s on wire", pinfo->fd->num, frame_len, frame_plurality); if (generate_bits_field) proto_item_append_text(ti, " (%u bits)", frame_len * 8); proto_item_append_text(ti, ", %u byte%s captured", cap_len, cap_plurality); if (generate_bits_field) { proto_item_append_text(ti, " (%u bits)", cap_len * 8); } if (pinfo->phdr->presence_flags & WTAP_HAS_INTERFACE_ID) { proto_item_append_text(ti, " on interface %u", pinfo->phdr->interface_id); } if (pinfo->phdr->presence_flags & WTAP_HAS_PACK_FLAGS) { if (pinfo->phdr->pack_flags & 0x00000001) { proto_item_append_text(ti, " (inbound)"); pinfo->p2p_dir = P2P_DIR_RECV; } if (pinfo->phdr->pack_flags & 0x00000002) { proto_item_append_text(ti, " (outbound)"); pinfo->p2p_dir = P2P_DIR_SENT; } } fh_tree = proto_item_add_subtree(ti, ett_frame); if (pinfo->phdr->presence_flags & WTAP_HAS_INTERFACE_ID && proto_field_is_referenced(tree, hf_frame_interface_id)) { const char *interface_name = epan_get_interface_name(pinfo->epan, pinfo->phdr->interface_id); if (interface_name) proto_tree_add_uint_format_value(fh_tree, hf_frame_interface_id, tvb, 0, 0, pinfo->phdr->interface_id, "%u (%s)", pinfo->phdr->interface_id, interface_name); else proto_tree_add_uint(fh_tree, hf_frame_interface_id, tvb, 0, 0, pinfo->phdr->interface_id); } if (pinfo->phdr->presence_flags & WTAP_HAS_PACK_FLAGS) { proto_tree *flags_tree; proto_item *flags_item; flags_item = proto_tree_add_uint(fh_tree, hf_frame_pack_flags, tvb, 0, 0, pinfo->phdr->pack_flags); flags_tree = proto_item_add_subtree(flags_item, ett_flags); proto_tree_add_uint(flags_tree, hf_frame_pack_direction, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_uint(flags_tree, hf_frame_pack_reception_type, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_uint(flags_tree, hf_frame_pack_fcs_length, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_uint(flags_tree, hf_frame_pack_reserved, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_boolean(flags_tree, hf_frame_pack_crc_error, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_boolean(flags_tree, hf_frame_pack_wrong_packet_too_long_error, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_boolean(flags_tree, hf_frame_pack_wrong_packet_too_short_error, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_boolean(flags_tree, hf_frame_pack_wrong_inter_frame_gap_error, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_boolean(flags_tree, hf_frame_pack_unaligned_frame_error, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_boolean(flags_tree, hf_frame_pack_start_frame_delimiter_error, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_boolean(flags_tree, hf_frame_pack_preamble_error, tvb, 0, 0, pinfo->phdr->pack_flags); proto_tree_add_boolean(flags_tree, hf_frame_pack_symbol_error, tvb, 0, 0, pinfo->phdr->pack_flags); } if (pinfo->phdr->rec_type == REC_TYPE_PACKET) proto_tree_add_int(fh_tree, hf_frame_wtap_encap, tvb, 0, 0, pinfo->fd->lnk_t); if (pinfo->fd->flags.has_ts) { proto_tree_add_time(fh_tree, hf_frame_arrival_time, tvb, 0, 0, &(pinfo->fd->abs_ts)); if(pinfo->fd->abs_ts.nsecs < 0 || pinfo->fd->abs_ts.nsecs >= 1000000000) { expert_add_info_format(pinfo, ti, &ei_arrive_time_out_of_range, "Arrival Time: Fractional second %09ld is invalid," " the valid range is 0-1000000000", (long) pinfo->fd->abs_ts.nsecs); } item = proto_tree_add_time(fh_tree, hf_frame_shift_offset, tvb, 0, 0, &(pinfo->fd->shift_offset)); PROTO_ITEM_SET_GENERATED(item); if(generate_epoch_time) { proto_tree_add_time(fh_tree, hf_frame_arrival_time_epoch, tvb, 0, 0, &(pinfo->fd->abs_ts)); } if (proto_field_is_referenced(tree, hf_frame_time_delta)) { nstime_t del_cap_ts; frame_delta_abs_time(pinfo->epan, pinfo->fd, pinfo->fd->num - 1, &del_cap_ts); item = proto_tree_add_time(fh_tree, hf_frame_time_delta, tvb, 0, 0, &(del_cap_ts)); PROTO_ITEM_SET_GENERATED(item); } if (proto_field_is_referenced(tree, hf_frame_time_delta_displayed)) { nstime_t del_dis_ts; frame_delta_abs_time(pinfo->epan, pinfo->fd, pinfo->fd->prev_dis_num, &del_dis_ts); item = proto_tree_add_time(fh_tree, hf_frame_time_delta_displayed, tvb, 0, 0, &(del_dis_ts)); PROTO_ITEM_SET_GENERATED(item); } item = proto_tree_add_time(fh_tree, hf_frame_time_relative, tvb, 0, 0, &(pinfo->rel_ts)); PROTO_ITEM_SET_GENERATED(item); if(pinfo->fd->flags.ref_time){ ti = proto_tree_add_item(fh_tree, hf_frame_time_reference, tvb, 0, 0, ENC_NA); PROTO_ITEM_SET_GENERATED(ti); } } proto_tree_add_uint(fh_tree, hf_frame_number, tvb, 0, 0, pinfo->fd->num); proto_tree_add_uint_format(fh_tree, hf_frame_len, tvb, 0, 0, frame_len, "Frame Length: %u byte%s (%u bits)", frame_len, frame_plurality, frame_len * 8); proto_tree_add_uint_format(fh_tree, hf_frame_capture_len, tvb, 0, 0, cap_len, "Capture Length: %u byte%s (%u bits)", cap_len, cap_plurality, cap_len * 8); if (generate_md5_hash) { const guint8 *cp; md5_state_t md_ctx; md5_byte_t digest[16]; const gchar *digest_string; cp = tvb_get_ptr(tvb, 0, cap_len); md5_init(&md_ctx); md5_append(&md_ctx, cp, cap_len); md5_finish(&md_ctx, digest); digest_string = bytestring_to_str(wmem_packet_scope(), digest, 16, '\0'); ti = proto_tree_add_string(fh_tree, hf_frame_md5_hash, tvb, 0, 0, digest_string); PROTO_ITEM_SET_GENERATED(ti); } ti = proto_tree_add_boolean(fh_tree, hf_frame_marked, tvb, 0, 0,pinfo->fd->flags.marked); PROTO_ITEM_SET_GENERATED(ti); ti = proto_tree_add_boolean(fh_tree, hf_frame_ignored, tvb, 0, 0,pinfo->fd->flags.ignored); PROTO_ITEM_SET_GENERATED(ti); if(proto_field_is_referenced(tree, hf_frame_protocols)) { /* we are going to be using proto_item_append_string() on * hf_frame_protocols, and we must therefore disable the * TRY_TO_FAKE_THIS_ITEM() optimisation for the tree by * setting it as visible. * * See proto.h for details. */ old_visible = proto_tree_set_visible(fh_tree, TRUE); ti = proto_tree_add_string(fh_tree, hf_frame_protocols, tvb, 0, 0, ""); PROTO_ITEM_SET_GENERATED(ti); proto_tree_set_visible(fh_tree, old_visible); } /* Check for existences of P2P pseudo header */ if (pinfo->p2p_dir != P2P_DIR_UNKNOWN) { proto_tree_add_int(fh_tree, hf_frame_p2p_dir, tvb, 0, 0, pinfo->p2p_dir); } /* Check for existences of MTP2 link number */ if ((pinfo->pseudo_header != NULL ) && (pinfo->fd->lnk_t == WTAP_ENCAP_MTP2_WITH_PHDR)) { proto_tree_add_uint(fh_tree, hf_link_number, tvb, 0, 0, pinfo->link_number); } if (show_file_off) { proto_tree_add_int64_format_value(fh_tree, hf_frame_file_off, tvb, 0, 0, pinfo->fd->file_off, "%" G_GINT64_MODIFIER "d (0x%" G_GINT64_MODIFIER "x)", pinfo->fd->file_off, pinfo->fd->file_off); } if(pinfo->fd->color_filter != NULL) { const color_filter_t *color_filter = (const color_filter_t *)pinfo->fd->color_filter; item = proto_tree_add_string(fh_tree, hf_frame_color_filter_name, tvb, 0, 0, color_filter->filter_name); PROTO_ITEM_SET_GENERATED(item); item = proto_tree_add_string(fh_tree, hf_frame_color_filter_text, tvb, 0, 0, color_filter->filter_text); PROTO_ITEM_SET_GENERATED(item); } } if (pinfo->fd->flags.ignored) { /* Ignored package, stop handling here */ col_set_str(pinfo->cinfo, COL_INFO, "<Ignored>"); proto_tree_add_text (tree, tvb, 0, 0, "This frame is marked as ignored"); return; } /* Portable Exception Handling to trap Wireshark specific exceptions like BoundsError exceptions */ TRY { #ifdef _MSC_VER /* Win32: Visual-C Structured Exception Handling (SEH) to trap hardware exceptions like memory access violations. (a running debugger will be called before the except part below) */ /* Note: A Windows "exceptional exception" may leave the kazlib's (Portable Exception Handling) stack in an inconsistent state thus causing a crash at some point in the handling of the exception. See: https://www.wireshark.org/lists/wireshark-dev/200704/msg00243.html */ __try { #endif switch (pinfo->phdr->rec_type) { case REC_TYPE_PACKET: if ((force_docsis_encap) && (docsis_handle)) { call_dissector(docsis_handle, tvb, pinfo, parent_tree); } else { if (!dissector_try_uint(wtap_encap_dissector_table, pinfo->fd->lnk_t, tvb, pinfo, parent_tree)) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN"); col_add_fstr(pinfo->cinfo, COL_INFO, "WTAP_ENCAP = %d", pinfo->fd->lnk_t); call_dissector(data_handle,tvb, pinfo, parent_tree); } } break; case REC_TYPE_FT_SPECIFIC_EVENT: case REC_TYPE_FT_SPECIFIC_REPORT: if (!dissector_try_uint(wtap_fts_rec_dissector_table, pinfo->file_type_subtype, tvb, pinfo, parent_tree)) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN"); col_add_fstr(pinfo->cinfo, COL_INFO, "WTAP_ENCAP = %d", pinfo->file_type_subtype); call_dissector(data_handle,tvb, pinfo, parent_tree); } break; } #ifdef _MSC_VER } __except(EXCEPTION_EXECUTE_HANDLER /* handle all exceptions */) { switch(GetExceptionCode()) { case(STATUS_ACCESS_VIOLATION): show_exception(tvb, pinfo, parent_tree, DissectorError, "STATUS_ACCESS_VIOLATION: dissector accessed an invalid memory address"); break; case(STATUS_INTEGER_DIVIDE_BY_ZERO): show_exception(tvb, pinfo, parent_tree, DissectorError, "STATUS_INTEGER_DIVIDE_BY_ZERO: dissector tried an integer division by zero"); break; case(STATUS_STACK_OVERFLOW): show_exception(tvb, pinfo, parent_tree, DissectorError, "STATUS_STACK_OVERFLOW: dissector overflowed the stack (e.g. endless loop)"); /* XXX - this will have probably corrupted the stack, which makes problems later in the exception code */ break; /* XXX - add other hardware exception codes as required */ default: show_exception(tvb, pinfo, parent_tree, DissectorError, g_strdup_printf("dissector caused an unknown exception: 0x%x", GetExceptionCode())); } } #endif } CATCH_BOUNDS_AND_DISSECTOR_ERRORS { show_exception(tvb, pinfo, parent_tree, EXCEPT_CODE, GET_MESSAGE); } ENDTRY; if(proto_field_is_referenced(tree, hf_frame_protocols)) { wmem_strbuf_t *val = wmem_strbuf_sized_new(wmem_packet_scope(), 128, 0); wmem_list_frame_t *frame; /* skip the first entry, it's always the "frame" protocol */ frame = wmem_list_frame_next(wmem_list_head(pinfo->layers)); if (frame) { wmem_strbuf_append(val, proto_get_protocol_filter_name(GPOINTER_TO_UINT(wmem_list_frame_data(frame)))); frame = wmem_list_frame_next(frame); } while (frame) { wmem_strbuf_append_c(val, ':'); wmem_strbuf_append(val, proto_get_protocol_filter_name(GPOINTER_TO_UINT(wmem_list_frame_data(frame)))); frame = wmem_list_frame_next(frame); } proto_item_append_string(ti, wmem_strbuf_get_str(val)); } /* Call postdissectors if we have any (while trying to avoid another * TRY/CATCH) */ if (have_postdissector()) { TRY { #ifdef _MSC_VER /* Win32: Visual-C Structured Exception Handling (SEH) to trap hardware exceptions like memory access violations */ /* (a running debugger will be called before the except part below) */ /* Note: A Windows "exceptional exception" may leave the kazlib's (Portable Exception Handling) stack in an inconsistent state thus causing a crash at some point in the handling of the exception. See: https://www.wireshark.org/lists/wireshark-dev/200704/msg00243.html */ __try { #endif call_all_postdissectors(tvb, pinfo, parent_tree); #ifdef _MSC_VER } __except(EXCEPTION_EXECUTE_HANDLER /* handle all exceptions */) { switch(GetExceptionCode()) { case(STATUS_ACCESS_VIOLATION): show_exception(tvb, pinfo, parent_tree, DissectorError, "STATUS_ACCESS_VIOLATION: dissector accessed an invalid memory address"); break; case(STATUS_INTEGER_DIVIDE_BY_ZERO): show_exception(tvb, pinfo, parent_tree, DissectorError, "STATUS_INTEGER_DIVIDE_BY_ZERO: dissector tried an integer division by zero"); break; case(STATUS_STACK_OVERFLOW): show_exception(tvb, pinfo, parent_tree, DissectorError, "STATUS_STACK_OVERFLOW: dissector overflowed the stack (e.g. endless loop)"); /* XXX - this will have probably corrupted the stack, which makes problems later in the exception code */ break; /* XXX - add other hardware exception codes as required */ default: show_exception(tvb, pinfo, parent_tree, DissectorError, g_strdup_printf("dissector caused an unknown exception: 0x%x", GetExceptionCode())); } } #endif } CATCH_BOUNDS_AND_DISSECTOR_ERRORS { show_exception(tvb, pinfo, parent_tree, EXCEPT_CODE, GET_MESSAGE); } ENDTRY; } tap_queue_packet(frame_tap, pinfo, NULL); if (pinfo->frame_end_routines) { g_slist_foreach(pinfo->frame_end_routines, &call_frame_end_routine, NULL); g_slist_free(pinfo->frame_end_routines); pinfo->frame_end_routines = NULL; } }