diff options
Diffstat (limited to 'source/nmbd/nmbd_incomingrequests.c')
| -rw-r--r-- | source/nmbd/nmbd_incomingrequests.c | 354 |
1 files changed, 197 insertions, 157 deletions
diff --git a/source/nmbd/nmbd_incomingrequests.c b/source/nmbd/nmbd_incomingrequests.c index 834f237a2c2..dbbb7315787 100644 --- a/source/nmbd/nmbd_incomingrequests.c +++ b/source/nmbd/nmbd_incomingrequests.c @@ -1,5 +1,6 @@ /* - Unix SMB/CIFS implementation. + Unix SMB/Netbios implementation. + Version 1.9. NBT netbios routines and daemon - version 2 Copyright (C) Andrew Tridgell 1994-1998 Copyright (C) Luke Kenneth Casson Leighton 1994-1998 @@ -66,6 +67,7 @@ void process_name_release_request(struct subnet_record *subrec, struct name_record *namerec; int rcode = 0; + START_PROFILE(name_release); putip((char *)&owner_ip,&nmb->additional->rdata[2]); if(!bcast) @@ -82,7 +84,7 @@ received for name %s from IP %s on subnet %s. Error - should be sent to WINS ser nmb_namestr(question), inet_ntoa(owner_ip), subrec->subnet_name)); send_name_release_response(FMT_ERR, p); - return; + goto done; } DEBUG(3,("process_name_release_request: Name release on name %s, \ @@ -92,7 +94,7 @@ subnet %s from owner IP %s\n", /* If someone is releasing a broadcast group name, just ignore it. */ if( group && !ismyip(owner_ip) ) - return; + goto done; /* * Code to work around a bug in FTP OnNet software NBT implementation. @@ -106,7 +108,7 @@ subnet %s from owner IP %s\n", DEBUG(6,("process_name_release_request: FTP OnNet bug workaround. Ignoring \ group release name %s from IP %s on subnet %s with no group bit set.\n", nmb_namestr(question), inet_ntoa(owner_ip), subrec->subnet_name )); - return; + goto done; } namerec = find_name_on_subnet(subrec, &nmb->question.question_name, FIND_ANY_NAME); @@ -123,10 +125,12 @@ on subnet %s being rejected as it is one of our names.\n", } if(rcode == 0) - return; + goto done; /* Send a NAME RELEASE RESPONSE (pos/neg) see rfc1002.txt 4.2.10-11 */ send_name_release_response(rcode, p); +done: + END_PROFILE(name_release); } /**************************************************************************** @@ -162,6 +166,7 @@ void process_name_refresh_request(struct subnet_record *subrec, BOOL bcast = nmb->header.nm_flags.bcast; struct in_addr from_ip; + START_PROFILE(name_refresh); putip((char *)&from_ip,&nmb->additional->rdata[2]); if(!bcast) @@ -179,7 +184,7 @@ received for name %s from IP %s on subnet %s.\n", DEBUG(0,("Error - should be sent to WINS server\n")); send_name_registration_response(FMT_ERR, 0, p); - return; + goto done; } /* Just log a message. We really don't care about broadcast name @@ -188,6 +193,8 @@ received for name %s from IP %s on subnet %s.\n", DEBUG(3,("process_name_refresh_request: Name refresh for name %s \ IP %s on subnet %s\n", nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet_name)); +done: + END_PROFILE(name_refresh); } /**************************************************************************** @@ -206,6 +213,7 @@ void process_name_registration_request(struct subnet_record *subrec, int ttl = nmb->additional->ttl; struct in_addr from_ip; + START_PROFILE(name_registration); putip((char *)&from_ip,&nmb->additional->rdata[2]); if(!bcast) @@ -222,7 +230,7 @@ received for name %s from IP %s on subnet %s. Error - should be sent to WINS ser nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet_name)); send_name_registration_response(FMT_ERR, 0, p); - return; + goto done; } DEBUG(3,("process_name_registration_request: Name registration for name %s \ @@ -256,7 +264,7 @@ IP %s on subnet %s\n", nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet register a name that's a group name as a unique name */ send_name_registration_response(ACT_ERR, 0, p); - return; + goto done; } else if(namerec != NULL) { @@ -266,7 +274,7 @@ IP %s on subnet %s\n", nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet DEBUG(3,("process_name_registration_request: Updated name record %s \ with IP %s on subnet %s\n",nmb_namestr(&namerec->name),inet_ntoa(from_ip), subrec->subnet_name)); - return; + goto done; } } else @@ -280,9 +288,11 @@ with IP %s on subnet %s\n",nmb_namestr(&namerec->name),inet_ntoa(from_ip), subre { /* Disallow group names when we have a unique name. */ send_name_registration_response(ACT_ERR, 0, p); - return; + goto done; } } +done: + END_PROFILE(name_registration); } /**************************************************************************** @@ -326,6 +336,7 @@ void process_node_status_request(struct subnet_record *subrec, struct packet_str int names_added,i; struct name_record *namerec; + START_PROFILE(node_status); DEBUG(3,("process_node_status_request: status request for name %s from IP %s on \ subnet %s.\n", nmb_namestr(&nmb->question.question_name), inet_ntoa(p->ip), subrec->subnet_name)); @@ -337,7 +348,7 @@ subnet %s.\n", nmb_namestr(&nmb->question.question_name), inet_ntoa(p->ip), subnet %s - name not found.\n", nmb_namestr(&nmb->question.question_name), inet_ntoa(p->ip), subrec->subnet_name)); - return; + goto done; } /* this is not an exact calculation. the 46 is for the stats buffer @@ -434,6 +445,8 @@ subnet %s - name not found.\n", nmb_namestr(&nmb->question.question_name), 0, /* ttl. */ rdata, /* data to send. */ PTR_DIFF(buf,rdata)); /* data length. */ +done: + END_PROFILE(node_status); } @@ -449,151 +462,178 @@ For broadcast name queries: void process_name_query_request(struct subnet_record *subrec, struct packet_struct *p) { - struct nmb_packet *nmb = &p->packet.nmb; - struct nmb_name *question = &nmb->question.question_name; - int name_type = question->name_type; - BOOL bcast = nmb->header.nm_flags.bcast; - int ttl=0; - int rcode = 0; - char *prdata = NULL; - char rdata[6]; - BOOL success = False; - struct name_record *namerec = NULL; - int reply_data_len = 0; - int i; - - DEBUG(3,("process_name_query_request: Name query from %s on subnet %s for name %s\n", - inet_ntoa(p->ip), subrec->subnet_name, nmb_namestr(question))); + struct nmb_packet *nmb = &p->packet.nmb; + struct nmb_name *question = &nmb->question.question_name; + int name_type = question->name_type; + BOOL bcast = nmb->header.nm_flags.bcast; + int ttl=0; + int rcode = 0; + char *prdata = NULL; + char rdata[6]; + BOOL success = False; + struct name_record *namerec = NULL; + int reply_data_len = 0; + int i; + + START_PROFILE(name_query); + DEBUG(3,("process_name_query_request: Name query from %s on subnet %s for name %s\n", + inet_ntoa(p->ip), subrec->subnet_name, nmb_namestr(question))); - /* Look up the name in the cache - if the request is a broadcast request that - came from a subnet we don't know about then search all the broadcast subnets - for a match (as we don't know what interface the request came in on). */ - - if(subrec == remote_broadcast_subnet) - namerec = find_name_for_remote_broadcast_subnet( question, FIND_ANY_NAME); - else - namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME); - - /* Check if it is a name that expired */ - if (namerec && - ((namerec->data.death_time != PERMANENT_TTL) && - (namerec->data.death_time < p->timestamp))) { - DEBUG(5,("process_name_query_request: expired name %s\n", nmb_namestr(&namerec->name))); - namerec = NULL; - } - - if (namerec) { - /* - * Always respond to unicast queries. - * Don't respond to broadcast queries unless the query is for - * a name we own, a Primary Domain Controller name, or a WINS_PROXY - * name with type 0 or 0x20. WINS_PROXY names are only ever added - * into the namelist if we were configured as a WINS proxy. - */ - - if (!bcast || - (bcast && ((name_type == 0x1b) || - (namerec->data.source == SELF_NAME) || - (namerec->data.source == PERMANENT_NAME) || - ((namerec->data.source == WINS_PROXY_NAME) && - ((name_type == 0) || (name_type == 0x20)))))) { - /* The requested name is a directed query, or it's SELF or PERMANENT or WINS_PROXY, - or it's a Domain Master type. */ - - /* - * If this is a WINS_PROXY_NAME, then ceck that none of the IP - * addresses we are returning is on the same broadcast subnet - * as the requesting packet. If it is then don't reply as the - * actual machine will be replying also and we don't want two - * replies to a broadcast query. - */ - - if (namerec->data.source == WINS_PROXY_NAME) { - for( i = 0; i < namerec->data.num_ips; i++) { - if (same_net(namerec->data.ip[i], subrec->myip, subrec->mask_ip)) { - DEBUG(5,("process_name_query_request: name %s is a WINS proxy name and is also on the same subnet (%s) as the requestor. Not replying.\n", - nmb_namestr(&namerec->name), subrec->subnet_name )); - return; - } - } - } - - ttl = (namerec->data.death_time != PERMANENT_TTL) ? - namerec->data.death_time - p->timestamp : lp_max_ttl(); - - /* Copy all known ip addresses into the return data. */ - /* Optimise for the common case of one IP address so - we don't need a malloc. */ - - if (namerec->data.num_ips == 1) { - prdata = rdata; - } else { - if ((prdata = (char *)malloc( namerec->data.num_ips * 6 )) == NULL) { - DEBUG(0,("process_name_query_request: malloc fail !\n")); - return; - } - } - - for (i = 0; i < namerec->data.num_ips; i++) { - set_nb_flags(&prdata[i*6],namerec->data.nb_flags); - putip((char *)&prdata[2+(i*6)], &namerec->data.ip[i]); - } - - sort_query_replies(prdata, i, p->ip); - - reply_data_len = namerec->data.num_ips * 6; - success = True; - } - } - - /* - * If a machine is broadcasting a name lookup request and we have lp_wins_proxy() - * set we should initiate a WINS query here. On success we add the resolved name - * into our namelist with a type of WINS_PROXY_NAME and then reply to the query. - */ - - if(!success && (namerec == NULL) && we_are_a_wins_client() && lp_wins_proxy() && - bcast && (subrec != remote_broadcast_subnet)) { - make_wins_proxy_name_query_request( subrec, p, question ); - return; - } - - if (!success && bcast) { - if(prdata != rdata) - SAFE_FREE(prdata); - return; /* Never reply with a negative response to broadcasts. */ - } - - /* - * Final check. From observation, if a unicast packet is sent - * to a non-WINS server with the recursion desired bit set - * then never send a negative response. - */ - - if(!success && !bcast && nmb->header.nm_flags.recursion_desired) { - if(prdata != rdata) - SAFE_FREE(prdata); - return; - } - - if (success) { - rcode = 0; - DEBUG(3,("OK\n")); - } else { - rcode = NAM_ERR; - DEBUG(3,("UNKNOWN\n")); - } - - /* See rfc1002.txt 4.2.13. */ - - reply_netbios_packet(p, /* Packet to reply to. */ - rcode, /* Result code. */ - NMB_QUERY, /* nmbd type code. */ - NMB_NAME_QUERY_OPCODE, /* opcode. */ - ttl, /* ttl. */ - prdata, /* data to send. */ - reply_data_len); /* data length. */ - - if(prdata != rdata) - SAFE_FREE(prdata); + /* Look up the name in the cache - if the request is a broadcast request that + came from a subnet we don't know about then search all the broadcast subnets + for a match (as we don't know what interface the request came in on). */ + + if(subrec == remote_broadcast_subnet) + namerec = find_name_for_remote_broadcast_subnet( question, FIND_ANY_NAME); + else + namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME); + + + /* Check if it is a name that expired */ + if( namerec + && ( (namerec->data.death_time != PERMANENT_TTL) + && (namerec->data.death_time < p->timestamp) ) ) + { + DEBUG(5,("process_name_query_request: expired name %s\n", nmb_namestr(&namerec->name))); + namerec = NULL; + } + + if (namerec) + { + + /* + * Always respond to unicast queries. + * Don't respond to broadcast queries unless the query is for + * a name we own, a Primary Domain Controller name, or a WINS_PROXY + * name with type 0 or 0x20. WINS_PROXY names are only ever added + * into the namelist if we were configured as a WINS proxy. + */ + + if( !bcast + || ( bcast + && ( (name_type == 0x1b) + || (namerec->data.source == SELF_NAME) + || (namerec->data.source == PERMANENT_NAME) + || ( (namerec->data.source == WINS_PROXY_NAME) + && ( (name_type == 0) || (name_type == 0x20) ) + ) + ) + ) + ) + { + + /* The requested name is a directed query, or it's SELF or PERMANENT or WINS_PROXY, + or it's a Domain Master type. */ + + /* + * If this is a WINS_PROXY_NAME, then ceck that none of the IP + * addresses we are returning is on the same broadcast subnet + * as the requesting packet. If it is then don't reply as the + * actual machine will be replying also and we don't want two + * replies to a broadcast query. + */ + + if( namerec->data.source == WINS_PROXY_NAME ) + { + for( i = 0; i < namerec->data.num_ips; i++) + { + if(same_net( namerec->data.ip[i], subrec->myip, subrec->mask_ip )) + { + DEBUG(5,("process_name_query_request: name %s is a WINS proxy name and is also \ +on the same subnet (%s) as the requestor. Not replying.\n", + nmb_namestr(&namerec->name), subrec->subnet_name )); + goto done; + } + } + } + + ttl = (namerec->data.death_time != PERMANENT_TTL) ? + namerec->data.death_time - p->timestamp : lp_max_ttl(); + + /* Copy all known ip addresses into the return data. */ + /* Optimise for the common case of one IP address so + we don't need a malloc. */ + + if( namerec->data.num_ips == 1 ) + prdata = rdata; + else + { + if((prdata = (char *)malloc( namerec->data.num_ips * 6 )) == NULL) + { + DEBUG(0,("process_name_query_request: malloc fail !\n")); + goto done; + } + } + + for( i = 0; i < namerec->data.num_ips; i++ ) + { + set_nb_flags(&prdata[i*6],namerec->data.nb_flags); + putip((char *)&prdata[2+(i*6)], &namerec->data.ip[i]); + } + + sort_query_replies(prdata, i, p->ip); + + reply_data_len = namerec->data.num_ips * 6; + success = True; + } + } + + /* + * If a machine is broadcasting a name lookup request and we have lp_wins_proxy() + * set we should initiate a WINS query here. On success we add the resolved name + * into our namelist with a type of WINS_PROXY_NAME and then reply to the query. + */ + + if(!success && (namerec == NULL) && we_are_a_wins_client() && lp_wins_proxy() && + bcast && (subrec != remote_broadcast_subnet)) + { + make_wins_proxy_name_query_request( subrec, p, question ); + goto done; + } + + if (!success && bcast) + { + if((prdata != rdata) && (prdata != NULL)) + SAFE_FREE(prdata); + goto done; /* Never reply with a negative response to broadcasts. */ + } + + /* + * Final check. From observation, if a unicast packet is sent + * to a non-WINS server with the recursion desired bit set + * then never send a negative response. + */ + + if(!success && !bcast && nmb->header.nm_flags.recursion_desired) + { + if((prdata != rdata) && (prdata != NULL)) + SAFE_FREE(prdata); + goto done; + } + + if (success) + { + rcode = 0; + DEBUG(3,("OK\n")); + } + else + { + rcode = NAM_ERR; + DEBUG(3,("UNKNOWN\n")); + } + + /* See rfc1002.txt 4.2.13. */ + + reply_netbios_packet(p, /* Packet to reply to. */ + rcode, /* Result code. */ + NMB_QUERY, /* nmbd type code. */ + NMB_NAME_QUERY_OPCODE, /* opcode. */ + ttl, /* ttl. */ + prdata, /* data to send. */ + reply_data_len); /* data length. */ + + if((prdata != rdata) && (prdata != NULL)) + SAFE_FREE(prdata); +done: + END_PROFILE(name_query); } |