diff options
Diffstat (limited to 'packet-tds.c')
| -rw-r--r-- | packet-tds.c | 146 |
1 files changed, 73 insertions, 73 deletions
diff --git a/packet-tds.c b/packet-tds.c index 6d4a279f69..bae91d54e6 100644 --- a/packet-tds.c +++ b/packet-tds.c @@ -2,7 +2,7 @@ * Routines for TDS NetLib dissection * Copyright 2000-2002, Brian Bruns <camber@ais.org> * - * $Id: packet-tds.c,v 1.2 2002/08/20 02:04:00 guy Exp $ + * $Id: packet-tds.c,v 1.3 2002/08/28 21:00:36 jmayer Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs <gerald@ethereal.com> @@ -12,12 +12,12 @@ * 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. @@ -25,8 +25,8 @@ /* * The NETLIB protocol is a small blocking protocol designed to allow TDS - * to be placed within different transports (TCP, DECNet, IPX/SPX). It - * consist of an eight byte header containing a two byte size field, a last + * to be placed within different transports (TCP, DECNet, IPX/SPX). It + * consist of an eight byte header containing a two byte size field, a last * packet indicator, a one byte packet type field, and a 4 byte field used in * RPC communications whose purpose is unknown (it is most likely a conversation * number to multiplex multiple conversations over a single socket). @@ -57,13 +57,13 @@ * netlib packets may appear in single real packets. TDS PDUs may be split * over netlib packets (and real packets) and most certainly can appear * multiple times within a netlib packet. - * + * * Because of this, I abandoned my earlier attempt at making two dissectors, * one for netlib and one for TDS. Counterintuitively, a single dissector * turned out to be simpler than splitting it up. - * + * * Here are some of the (hefty) limitations of the current code - * + * * . We currently do not handle netlib headers that cross packet boundaries. * This should be an easy fix. * . I probably could have used the packet reassembly stuff, but I started @@ -79,10 +79,10 @@ * there are fields in the login packet which determine byte order. * . result sets that span netlib packets are not working * . TDS 7 and 4.2 result sets are not working yet - * + * * All that said, the code does deal gracefully with different boudary * conditions and what remains are the easier bits, IMHO. - * + * */ #ifdef HAVE_CONFIG_H @@ -112,7 +112,7 @@ x==TDS_RESP_PKT || \ x==TDS_QUERY5_PKT || \ x==TDS_QUERY5_PKT || \ - x==TDS_LOGIN7_PKT) + x==TDS_LOGIN7_PKT) /* The following constants are imported more or less directly from FreeTDS */ @@ -261,7 +261,7 @@ static const value_string env_chg_names[] = { #define MAX_COLUMNS 256 /* - * this is where we store the column information to be used in decoding the + * this is where we store the column information to be used in decoding the * TDS_ROW_TOKEN PDU's */ struct _tds_col { @@ -271,9 +271,9 @@ struct _tds_col { int csize; }; -/* +/* * The first time ethereal decodes a stream it calls each packet in order. - * We use this structure to pass data from the dissection of one packet to + * We use this structure to pass data from the dissection of one packet to * the next. After the initial dissection, this structure is largely unused. */ struct _conv_data { @@ -284,8 +284,8 @@ struct _conv_data { unsigned char tds_remainder[4096]; }; -/* - * Now on the first dissection of a packet copy the global (_conv_data) +/* + * Now on the first dissection of a packet copy the global (_conv_data) * to the packet data so that we may retrieve out of order later. */ struct _packet_data { @@ -296,8 +296,8 @@ struct _packet_data { unsigned char tds_remainder[4096]; }; -/* - * and finally a place for netlib packets within tcp packets +/* + * and finally a place for netlib packets within tcp packets */ struct _netlib_data { guint packet_type; @@ -375,7 +375,7 @@ static int tds_get_token_size(int token) } # if 0 /* - * data_to_string should take column data and turn it into something we can + * data_to_string should take column data and turn it into something we can * display on the tree. */ static char *data_to_string(void *data, guint col_type, guint col_size) @@ -405,8 +405,8 @@ static char *data_to_string(void *data, guint col_type, guint col_size) } #endif /* - * This function computes the number of bytes remaining from a PDU started in - * the previous netlib packet. + * This function computes the number of bytes remaining from a PDU started in + * the previous netlib packet. * XXX - needs some more PDU types added. */ static int @@ -459,7 +459,7 @@ int switched = 0; /* * Since rows are special PDUs in that they are not fixed and lack a size field, - * the length must be computed using the column information seen in the result + * the length must be computed using the column information seen in the result * PDU. This function does just that. */ static size_t @@ -482,10 +482,10 @@ guint cur, i, csize; return (cur - offset + 1); } -/* - * read the results PDU and store the relevent information in the _netlib_data +/* + * read the results PDU and store the relevent information in the _netlib_data * structure for later use (see tds_get_row_size) - * XXX - assumes that result token will be entirely contained within packet + * XXX - assumes that result token will be entirely contained within packet * boundry */ static gboolean @@ -494,13 +494,13 @@ read_results_tds5(tvbuff_t *tvb, struct _netlib_data *nl_data, int offset) guint len, name_len; guint cur; guint i; - + len = tvb_get_letohs(tvb, offset+1); cur = offset + 3; - /* - * This would be the logical place to check for little/big endianess if we - * didn't see the login packet. + /* + * This would be the logical place to check for little/big endianess if we + * didn't see the login packet. */ nl_data->num_cols = tvb_get_letohs(tvb, cur); @@ -533,8 +533,8 @@ guint i; return TRUE; } /* - * This function copies information about data crossing the netlib packet - * boundary from _netlib_data to _conv_data it is called at the end of packet + * This function copies information about data crossing the netlib packet + * boundary from _netlib_data to _conv_data it is called at the end of packet * dissection during the first decoding. */ void @@ -561,8 +561,8 @@ store_conv_data(packet_info *pinfo, struct _netlib_data *nl_data) conversation_add_proto_data(conv,proto_tds, conv_data); } /* - * This function copies information about data crossing the netlib packet - * boundary from _netlib_data to _pkt_data it is called after load_nelib_data + * This function copies information about data crossing the netlib packet + * boundary from _netlib_data to _pkt_data it is called after load_nelib_data * during packet dissection when the packet has not previously been seen. */ void @@ -633,9 +633,9 @@ load_netlib_data(packet_info *pinfo, struct _netlib_data *nl_data) } -/* - * read the eight byte netlib header, write the interesting parts into - * netlib_data, and return false if this is illegal (for heuristics) +/* + * read the eight byte netlib header, write the interesting parts into + * netlib_data, and return false if this is illegal (for heuristics) */ static gboolean netlib_read_header(tvbuff_t *tvb, guint offset, struct _netlib_data *nl_data) @@ -669,7 +669,7 @@ netlib_read_header(tvbuff_t *tvb, guint offset, struct _netlib_data *nl_data) * weak heuristics of the netlib check. */ static gboolean -netlib_check_login_pkt(tvbuff_t *tvb, int offset, packet_info *pinfo, struct _netlib_data *nl_data) +netlib_check_login_pkt(tvbuff_t *tvb, int offset, packet_info *pinfo, struct _netlib_data *nl_data) { guint tds_major, bytes_avail; @@ -679,7 +679,7 @@ netlib_check_login_pkt(tvbuff_t *tvb, int offset, packet_info *pinfo, struct _ne * we have two login packet styles, one for TDS 4.2 and 5.0 */ if (nl_data->packet_type==TDS_LOGIN_PKT) { - /* Use major version number to validate TDS 4/5 login + /* Use major version number to validate TDS 4/5 login * packet */ /* Login packet is first in stream and should not be fragmented... @@ -705,7 +705,7 @@ netlib_check_login_pkt(tvbuff_t *tvb, int offset, packet_info *pinfo, struct _ne return FALSE; } /* check if it is MS SQL default port */ - } else if (pinfo->srcport != 1433 && + } else if (pinfo->srcport != 1433 && pinfo->destport != 1433) { /* otherwise, we can not ensure this is netlib */ /* beyond a reasonable doubt. */ @@ -714,7 +714,7 @@ netlib_check_login_pkt(tvbuff_t *tvb, int offset, packet_info *pinfo, struct _ne } return TRUE; } - + static gboolean dissect_tds_env_chg(tvbuff_t *tvb, struct _netlib_data *nl_data _U_, guint offset, guint last_byte _U_, proto_tree *tree) { @@ -760,22 +760,22 @@ guint pos, token, token_sz = 0; gint skip_count; proto_tree *pdu_tree; - /* + /* * if we have unprocessed bytes from the previous dissection then we deal * those first. */ if (nl_data->netlib_unread_bytes) { end_of_pkt = nl_data->netlib_unread_bytes; } else { - /* - * otherwise the end of the packet is where we are now plus the + /* + * otherwise the end of the packet is where we are now plus the * packet_size minus the 8 header bytes. */ end_of_pkt = offset + nl_data->packet_size - 8; } /* - * the last byte to dissect is the end of the netlib packet or the end of + * the last byte to dissect is the end of the netlib packet or the end of * the tcp packet (tvb buffer) which ever comes first */ last_byte = tvb_length(tvb) > end_of_pkt ? end_of_pkt : tvb_length(tvb); @@ -790,9 +790,9 @@ proto_tree *pdu_tree; /* XXX - should be calling dissection here */ skip_count = get_skip_count(tvb, offset, nl_data, last_byte); - /* + /* * we started with left overs and the data continues to the end of - * this packet. Just add it on, and skip to the next packet + * this packet. Just add it on, and skip to the next packet */ if (skip_count == -1) { token = nl_data->tds_remainder[0]; @@ -834,7 +834,7 @@ proto_tree *pdu_tree; token_sz = tds_get_row_size(tvb, nl_data, pos + 1, last_byte); if (! token_sz) { - /* + /* * partial row, set size to end of packet and stash * the top half for the next packet dissection */ @@ -874,7 +874,7 @@ proto_tree *pdu_tree; /* and step to the end of the PDU, rinse, lather, repeat */ pos += token_sz; - + } } @@ -888,7 +888,7 @@ dissect_netlib_hdr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, stru bytes_remaining = tvb_length(tvb) - offset; bytes_avail = bytes_remaining > nl_data->packet_size ? nl_data->packet_size : bytes_remaining; - + /* In the interest of speed, if "tree" is NULL, don't do any work not * necessary to generate protocol tree items. */ @@ -899,12 +899,12 @@ dissect_netlib_hdr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, stru "Netlib Header"); netlib_tree = proto_item_add_subtree(netlib_hdr, ett_netlib); - proto_tree_add_text(netlib_tree, tvb, offset, 1, "Packet Type: %02x %s", - nl_data->packet_type, val_to_str(nl_data->packet_type, + proto_tree_add_text(netlib_tree, tvb, offset, 1, "Packet Type: %02x %s", + nl_data->packet_type, val_to_str(nl_data->packet_type, packet_type_names, "Unknown Packet Type")); - proto_tree_add_uint(netlib_tree, hf_netlib_last, tvb, offset+1, 1, + proto_tree_add_uint(netlib_tree, hf_netlib_last, tvb, offset+1, 1, nl_data->packet_last); - proto_tree_add_uint(netlib_tree, hf_netlib_size, tvb, offset+2, 2, + proto_tree_add_uint(netlib_tree, hf_netlib_size, tvb, offset+2, 2, nl_data->packet_size); } } @@ -927,7 +927,7 @@ dissect_netlib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) conv = find_conversation (&pinfo->src, &pinfo->dst, pinfo->ptype, pinfo->srcport, pinfo->destport, 0); - /* + /* * we don't know if this is our packet yet, so do nothing if we don't have * a conversation. */ @@ -943,14 +943,14 @@ dissect_netlib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) } #ifdef DEBUG - printf("offset = %d\n", offset); + printf("offset = %d\n", offset); #endif load_netlib_data(pinfo, &nl_data); - /* - * if offset is > 0 then we have undecoded data at the front of the - * packet. Call the TDS dissector on it. + /* + * if offset is > 0 then we have undecoded data at the front of the + * packet. Call the TDS dissector on it. */ if (nl_data.packet_type == TDS_RESP_PKT && offset) { dissect_tds(tvb, pinfo, tree, &nl_data, 0); @@ -960,9 +960,9 @@ dissect_netlib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) while (bytes_remaining > 0) { - /* - * if packet is less than 8 characters, its not a - * netlib packet + /* + * if packet is less than 8 characters, its not a + * netlib packet * This is not entirely correct...fix. */ if (bytes_remaining < 8) { @@ -972,15 +972,15 @@ dissect_netlib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) /* read header fields and check their validity */ if (!netlib_read_header(tvb, offset, &nl_data)) return FALSE; - + /* If we don't have a conversation is this a TDS stream? */ if (conv == NULL) { if (!netlib_check_login_pkt(tvb, offset, pinfo, &nl_data)) { return FALSE; } /* first packet checks out, create a conversation */ - conv = conversation_new (&pinfo->src, &pinfo->dst, - pinfo->ptype, pinfo->srcport, pinfo->destport, + conv = conversation_new (&pinfo->src, &pinfo->dst, + pinfo->ptype, pinfo->srcport, pinfo->destport, 0); } @@ -1002,21 +1002,21 @@ dissect_netlib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) } nl_data.netlib_unread_bytes = offset - tvb_length(tvb); - /* + /* * copy carry over data to the conversation buffer, to retrieve at beginning - * of next packet + * of next packet */ store_conv_data(pinfo, &nl_data); /* Make entries in Protocol column and Info column on summary display */ - if (check_col(pinfo->cinfo, COL_PROTOCOL)) + if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "TDS"); - + /* set the packet description based on its TDS packet type */ if (check_col(pinfo->cinfo, COL_INFO)) { col_add_fstr(pinfo->cinfo, COL_INFO, "%s", - val_to_str(nl_data.packet_type, packet_type_names, + val_to_str(nl_data.packet_type, packet_type_names, "Unknown Packet Type: %u")); } @@ -1033,23 +1033,23 @@ dissect_netlib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) void proto_register_netlib(void) -{ +{ /* Setup list of header fields See Section 1.6.1 for details*/ static hf_register_info hf[] = { { &hf_netlib_size, { "Size", "netlib.size", - FT_UINT16, BASE_DEC, NULL, 0x0, + FT_UINT16, BASE_DEC, NULL, 0x0, "Packet Size", HFILL } }, { &hf_netlib_type, { "Type", "netlib.type", - FT_UINT8, BASE_HEX, NULL, 0x0, + FT_UINT8, BASE_HEX, NULL, 0x0, "Packet Type", HFILL } }, { &hf_netlib_last, { "Last Packet", "netlib.last", - FT_UINT8, BASE_DEC, NULL, 0x0, + FT_UINT8, BASE_DEC, NULL, 0x0, "Last Packet Indicator", HFILL } }, }; |