diff options
Diffstat (limited to 'source3/namepacket.c')
| -rw-r--r-- | source3/namepacket.c | 327 |
1 files changed, 168 insertions, 159 deletions
diff --git a/source3/namepacket.c b/source3/namepacket.c index 5bfa55d4f1..1ebdf0a2bd 100644 --- a/source3/namepacket.c +++ b/source3/namepacket.c @@ -38,62 +38,137 @@ BOOL CanRecurse = True; extern pstring scope; extern struct in_addr ipgrp; -static uint16 name_trn_id=0; +extern uint16 name_trn_id; -/*************************************************************************** - updates the unique transaction identifier - **************************************************************************/ -void debug_browse_data(char *outbuf, int len) +/**************************************************************************** + process a nmb packet + ****************************************************************************/ +static void process_nmb(struct packet_struct *p) { - int i,j; - for (i = 0; i < len; i+= 16) + struct nmb_packet *nmb = &p->packet.nmb; + + debug_nmb_packet(p); + + switch (nmb->header.opcode) + { + case 8: /* what is this?? */ + case NMB_REG: + case NMB_REG_REFRESH: + { + if (nmb->header.response) + { + if (nmb->header.ancount==0) break; + response_netbios_packet(p); + } + else + { + if (nmb->header.qdcount==0 || nmb->header.arcount==0) break; + reply_name_reg(p); + } + break; + } + + case 0: + { + if (nmb->header.response) + { + switch (nmb->question.question_type) + { + case 0x0: + { + response_netbios_packet(p); + break; + } + } + return; + } + else if (nmb->header.qdcount>0) { - DEBUG(4, ("%3x char ", i)); - - for (j = 0; j < 16; j++) - { - unsigned char x = outbuf[i+j]; - if (x < 32 || x > 127) x = '.'; - - if (i+j >= len) break; - DEBUG(4, ("%c", x)); - } - - DEBUG(4, (" hex ", i)); - - for (j = 0; j < 16; j++) - { - if (i+j >= len) break; - DEBUG(4, (" %02x", outbuf[i+j])); - } - - DEBUG(4, ("\n")); + switch (nmb->question.question_type) + { + case NMB_QUERY: + { + reply_name_query(p); + break; + } + case NMB_STATUS: + { + reply_name_status(p); + break; + } + } + return; + } + break; + } + + case NMB_REL: + { + if (nmb->header.qdcount==0 || nmb->header.arcount==0) + { + DEBUG(2,("netbios release packet rejected\n")); + break; } + if (nmb->header.response) + { + if (nmb->header.ancount==0) break; + response_netbios_packet(p); + } + else + { + reply_name_release(p); + } + break; + } + } } /*************************************************************************** updates the unique transaction identifier **************************************************************************/ -static void update_name_trn_id(void) +void debug_browse_data(char *outbuf, int len) { - if (!name_trn_id) - { - name_trn_id = (time(NULL)%(unsigned)0x7FFF) + (getpid()%(unsigned)100); - } - name_trn_id = (name_trn_id+1) % (unsigned)0x7FFF; + int i,j; + for (i = 0; i < len; i+= 16) + { + DEBUG(4, ("%3x char ", i)); + + for (j = 0; j < 16; j++) + { + unsigned char x = outbuf[i+j]; + if (x < 32 || x > 127) x = '.'; + + if (i+j >= len) break; + DEBUG(4, ("%c", x)); + } + + DEBUG(4, (" hex ", i)); + + for (j = 0; j < 16; j++) + { + if (i+j >= len) break; + DEBUG(4, (" %02x", outbuf[i+j])); + } + + DEBUG(4, ("\n")); + } + } /**************************************************************************** initiate a netbios packet + + if we are making queries to samba, then the ip must be zero. in this + instance, the packet is constructed and then dealt with immediately. ****************************************************************************/ -void initiate_netbios_packet(uint16 *id, - int fd,int quest_type,char *name,int name_type, - int nb_flags,BOOL bcast,BOOL recurse, - struct in_addr to_ip) +BOOL initiate_netbios_packet(uint16 id, + int fd,int quest_type,char *name,int name_type, + int nb_flags,BOOL bcast,BOOL recurse, + struct in_addr to_ip) { struct packet_struct p; struct nmb_packet *nmb = &p.packet.nmb; @@ -101,8 +176,6 @@ void initiate_netbios_packet(uint16 *id, char *packet_type = "unknown"; int opcode = -1; - if (!id) return; - if (quest_type == NMB_STATUS) { packet_type = "nmb_status"; opcode = 0; } if (quest_type == NMB_QUERY ) { packet_type = "nmb_query"; opcode = 0; } if (quest_type == NMB_REG ) { packet_type = "nmb_reg"; opcode = 5; } @@ -110,18 +183,13 @@ void initiate_netbios_packet(uint16 *id, if (quest_type == NMB_REL ) { packet_type = "nmb_rel"; opcode = 6; } DEBUG(4,("initiating netbios packet: %s %s(%x) (bcast=%s) %s\n", - packet_type, name, name_type, BOOLSTR(bcast), inet_ntoa(to_ip))); + packet_type, name, name_type, BOOLSTR(bcast), inet_ntoa(to_ip))); - if (opcode == -1) return; + if (opcode == -1) return False; bzero((char *)&p,sizeof(p)); - if (*id == 0xffff) { - update_name_trn_id(); - *id = name_trn_id; /* allow resending with same id */ - } - - nmb->header.name_trn_id = *id; + nmb->header.name_trn_id = id; nmb->header.opcode = opcode; nmb->header.response = False; @@ -162,7 +230,7 @@ void initiate_netbios_packet(uint16 *id, nmb->additional->rdlength = 6; nmb->additional->rdata[0] = nb_flags; putip(&nmb->additional->rdata[2],(char *)iface_ip(to_ip)); - } + } p.ip = to_ip; p.port = NMB_PORT; @@ -170,12 +238,21 @@ void initiate_netbios_packet(uint16 *id, p.timestamp = time(NULL); p.packet_type = NMB_PACKET; - if (!send_packet(&p)) { - DEBUG(3,("send_packet to %s %d failed\n",inet_ntoa(p.ip),p.port)); - *id = 0xffff; + if (zero_ip(to_ip)) /* samba's own ip */ + { + DEBUG(4,("process packet ourselves\n")); + /* respond internally to the packet. */ + process_nmb(&p); } - - return; + else + { + if (!send_packet(&p)) { + DEBUG(3,("send_packet to %s %d failed\n",inet_ntoa(p.ip),p.port)); + return False; + } + } + + return True; } @@ -183,9 +260,9 @@ void initiate_netbios_packet(uint16 *id, reply to a netbios name packet ****************************************************************************/ void reply_netbios_packet(struct packet_struct *p1,int trn_id, - int rcode, int rcv_code, int opcode, BOOL recurse, - struct nmb_name *rr_name,int rr_type,int rr_class,int ttl, - char *data,int len) + int rcode, int rcv_code, int opcode, BOOL recurse, + struct nmb_name *rr_name,int rr_type,int rr_class,int ttl, + char *data,int len) { struct packet_struct p; struct nmb_packet *nmb = &p.packet.nmb; @@ -198,31 +275,31 @@ void reply_netbios_packet(struct packet_struct *p1,int trn_id, switch (rcv_code) { case NMB_STATUS: - { + { packet_type = "nmb_status"; recursion_desired = True; break; } case NMB_QUERY: - { + { packet_type = "nmb_query"; recursion_desired = True; break; } case NMB_REG: - { + { packet_type = "nmb_reg"; recursion_desired = True; break; } case NMB_REL: - { + { packet_type = "nmb_rel"; recursion_desired = False; break; } case NMB_WAIT_ACK: - { + { packet_type = "nmb_wack"; recursion_desired = False; break; @@ -230,14 +307,14 @@ void reply_netbios_packet(struct packet_struct *p1,int trn_id, default: { DEBUG(1,("replying netbios packet: %s %s\n", - packet_type, namestr(rr_name), inet_ntoa(p.ip))); + packet_type, namestr(rr_name), inet_ntoa(p.ip))); return; } } DEBUG(4,("replying netbios packet: %s %s\n", - packet_type, namestr(rr_name), inet_ntoa(p.ip))); + packet_type, namestr(rr_name), inet_ntoa(p.ip))); nmb->header.name_trn_id = trn_id; nmb->header.opcode = opcode; @@ -265,16 +342,25 @@ void reply_netbios_packet(struct packet_struct *p1,int trn_id, nmb->answers->ttl = ttl; if (data && len) - { - nmb->answers->rdlength = len; - memcpy(nmb->answers->rdata, data, len); - } + { + nmb->answers->rdlength = len; + memcpy(nmb->answers->rdata, data, len); + } p.packet_type = NMB_PACKET; debug_nmb_packet(&p); - send_packet(&p); + if (zero_ip(p.ip)) /* samba's own ip */ + { + DEBUG(4,("process response packet ourselves\n")); + /* respond internally to the packet. */ + process_nmb(&p); + } + else + { + send_packet(&p); + } } @@ -352,7 +438,7 @@ static void process_dgram(struct packet_struct *p) buf = &dgram->data[0]; buf -= 4; /* XXXX for the pseudo tcp length - - someday I need to get rid of this */ + someday I need to get rid of this */ if (CVAL(buf,smb_com) != SMBtrans) return; @@ -360,8 +446,8 @@ static void process_dgram(struct packet_struct *p) buf2 = smb_base(buf) + SVAL(buf,smb_vwv12); DEBUG(4,("datagram from %s to %s for %s of type %d len=%d\n", - namestr(&dgram->source_name),namestr(&dgram->dest_name), - smb_buf(buf),CVAL(buf2,0),len)); + namestr(&dgram->source_name),namestr(&dgram->dest_name), + smb_buf(buf),CVAL(buf2,0),len)); if (len <= 0) return; @@ -379,83 +465,6 @@ static void process_dgram(struct packet_struct *p) } } -/**************************************************************************** - process a nmb packet - ****************************************************************************/ -static void process_nmb(struct packet_struct *p) -{ - struct nmb_packet *nmb = &p->packet.nmb; - - debug_nmb_packet(p); - - switch (nmb->header.opcode) - { - case 8: /* what is this?? */ - case NMB_REG: - case NMB_REG_REFRESH: - { - if (nmb->header.qdcount==0 || nmb->header.arcount==0) break; - if (nmb->header.response) - response_netbios_packet(p); /* response to registration dealt - with here */ - else - reply_name_reg(p); - break; - } - - case 0: - { - if (nmb->header.response) - { - switch (nmb->question.question_type) - { - case 0x0: - { - response_netbios_packet(p); - break; - } - } - return; - } - else if (nmb->header.qdcount>0) - { - switch (nmb->question.question_type) - { - case NMB_QUERY: - { - reply_name_query(p); - break; - } - case NMB_STATUS: - { - reply_name_status(p); - break; - } - } - return; - } - break; - } - - case NMB_REL: - { - if (nmb->header.qdcount==0 || nmb->header.arcount==0) - { - DEBUG(2,("netbios release packet rejected\n")); - break; - } - - if (nmb->header.response) - response_netbios_packet(p); /* response to reply dealt with - in here */ - else - reply_name_release(p); - break; - } - } -} - - /******************************************************************* run elements off the packet queue till its empty ******************************************************************/ @@ -466,15 +475,15 @@ void run_packet_queue() while ((p=packet_queue)) { switch (p->packet_type) - { - case NMB_PACKET: - process_nmb(p); - break; - - case DGRAM_PACKET: - process_dgram(p); - break; - } + { + case NMB_PACKET: + process_nmb(p); + break; + + case DGRAM_PACKET: + process_dgram(p); + break; + } packet_queue = packet_queue->next; if (packet_queue) packet_queue->prev = NULL; @@ -550,8 +559,8 @@ try_again: wrong things to do! I should send to the requestors port. XXX **************************************************************************/ BOOL send_mailslot_reply(char *mailslot,int fd,char *buf,int len,char *srcname, - char *dstname,int src_type,int dest_type, - struct in_addr dest_ip,struct in_addr src_ip) + char *dstname,int src_type,int dest_type, + struct in_addr dest_ip,struct in_addr src_ip) { struct packet_struct p; struct dgram_packet *dgram = &p.packet.dgram; |