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-rw-r--r--source4/libcli/nmblib.c1316
1 files changed, 0 insertions, 1316 deletions
diff --git a/source4/libcli/nmblib.c b/source4/libcli/nmblib.c
deleted file mode 100644
index 0a3f72ba74..0000000000
--- a/source4/libcli/nmblib.c
+++ /dev/null
@@ -1,1316 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- NBT netbios library routines
- Copyright (C) Andrew Tridgell 1994-1998
-
- This program is free software; you can redistribute it and/or 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-*/
-
-#include "includes.h"
-#include "system/network.h"
-#include "system/time.h"
-#include "system/iconv.h"
-
-static const struct opcode_names {
- const char *nmb_opcode_name;
- int opcode;
-} nmb_header_opcode_names[] = {
- {"Query", 0 },
- {"Registration", 5 },
- {"Release", 6 },
- {"WACK", 7 },
- {"Refresh", 8 },
- {"Refresh(altcode)", 9 },
- {"Multi-homed Registration", 15 },
- {0, -1 }
-};
-
-/****************************************************************************
- * Lookup a nmb opcode name.
- ****************************************************************************/
-static const char *lookup_opcode_name( int opcode )
-{
- const struct opcode_names *op_namep;
- int i;
-
- for(i = 0; nmb_header_opcode_names[i].nmb_opcode_name != 0; i++) {
- op_namep = &nmb_header_opcode_names[i];
- if(opcode == op_namep->opcode)
- return op_namep->nmb_opcode_name;
- }
- return "<unknown opcode>";
-}
-
-/****************************************************************************
- print out a res_rec structure
- ****************************************************************************/
-static void debug_nmb_res_rec(struct res_rec *res, const char *hdr)
-{
- int i, j;
-
- DEBUGADD( 4, ( " %s: nmb_name=%s rr_type=%d rr_class=%d ttl=%d\n",
- hdr,
- nmb_namestr(&res->rr_name),
- res->rr_type,
- res->rr_class,
- res->ttl ) );
-
- if( res->rdlength == 0 || res->rdata == NULL )
- return;
-
- for (i = 0; i < res->rdlength; i+= 16)
- {
- DEBUGADD(4, (" %s %3x char ", hdr, i));
-
- for (j = 0; j < 16; j++)
- {
- uint8_t x = res->rdata[i+j];
- if (x < 32 || x > 127) x = '.';
-
- if (i+j >= res->rdlength) break;
- DEBUGADD(4, ("%c", x));
- }
-
- DEBUGADD(4, (" hex "));
-
- for (j = 0; j < 16; j++)
- {
- if (i+j >= res->rdlength) break;
- DEBUGADD(4, ("%02X", (uint8_t)res->rdata[i+j]));
- }
-
- DEBUGADD(4, ("\n"));
- }
-}
-
-/****************************************************************************
- process a nmb packet
- ****************************************************************************/
-void debug_nmb_packet(struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
-
- if (DEBUGLVL(4)) {
- DEBUG(4, ("nmb packet from %s(%d) header: id=%d opcode=%s(%d) response=%s\n",
- sys_inet_ntoa(p->ip), p->port,
- nmb->header.name_trn_id,
- lookup_opcode_name(nmb->header.opcode),
- nmb->header.opcode,
- BOOLSTR(nmb->header.response)));
- DEBUG(4, (" header: flags: bcast=%s rec_avail=%s rec_des=%s trunc=%s auth=%s\n",
- BOOLSTR(nmb->header.nm_flags.bcast),
- BOOLSTR(nmb->header.nm_flags.recursion_available),
- BOOLSTR(nmb->header.nm_flags.recursion_desired),
- BOOLSTR(nmb->header.nm_flags.trunc),
- BOOLSTR(nmb->header.nm_flags.authoritative)));
- DEBUG(4, (" header: rcode=%d qdcount=%d ancount=%d nscount=%d arcount=%d\n",
- nmb->header.rcode,
- nmb->header.qdcount,
- nmb->header.ancount,
- nmb->header.nscount,
- nmb->header.arcount));
- }
-
- if (nmb->header.qdcount)
- {
- DEBUGADD( 4, ( " question: q_name=%s q_type=%d q_class=%d\n",
- nmb_namestr(&nmb->question.question_name),
- nmb->question.question_type,
- nmb->question.question_class) );
- }
-
- if (nmb->answers && nmb->header.ancount)
- {
- debug_nmb_res_rec(nmb->answers,"answers");
- }
- if (nmb->nsrecs && nmb->header.nscount)
- {
- debug_nmb_res_rec(nmb->nsrecs,"nsrecs");
- }
- if (nmb->additional && nmb->header.arcount)
- {
- debug_nmb_res_rec(nmb->additional,"additional");
- }
-}
-
-/*******************************************************************
- handle "compressed" name pointers
- ******************************************************************/
-static BOOL handle_name_ptrs(uint8_t *ubuf,int *offset,int length,
- BOOL *got_pointer,int *ret)
-{
- int loop_count=0;
-
- while ((ubuf[*offset] & 0xC0) == 0xC0) {
- if (!*got_pointer) (*ret) += 2;
- (*got_pointer)=True;
- (*offset) = ((ubuf[*offset] & ~0xC0)<<8) | ubuf[(*offset)+1];
- if (loop_count++ == 10 || (*offset) < 0 || (*offset)>(length-2)) {
- return(False);
- }
- }
- return(True);
-}
-
-/*******************************************************************
- parse a nmb name from "compressed" format to something readable
- return the space taken by the name, or 0 if the name is invalid
- ******************************************************************/
-static int parse_nmb_name(char *inbuf,int ofs,int length, struct nmb_name *name)
-{
- int m,n=0;
- uint8_t *ubuf = (uint8_t *)inbuf;
- int ret = 0;
- BOOL got_pointer=False;
- int loop_count=0;
- int offset = ofs;
-
- if (length - offset < 2)
- return(0);
-
- /* handle initial name pointers */
- if (!handle_name_ptrs(ubuf,&offset,length,&got_pointer,&ret))
- return(0);
-
- m = ubuf[offset];
-
- if (!m)
- return(0);
- if ((m & 0xC0) || offset+m+2 > length)
- return(0);
-
- memset((char *)name,'\0',sizeof(*name));
-
- /* the "compressed" part */
- if (!got_pointer)
- ret += m + 2;
- offset++;
- while (m > 0) {
- uint8_t c1,c2;
- c1 = ubuf[offset++]-'A';
- c2 = ubuf[offset++]-'A';
- if ((c1 & 0xF0) || (c2 & 0xF0) || (n > sizeof(name->name)-1))
- return(0);
- name->name[n++] = (c1<<4) | c2;
- m -= 2;
- }
- name->name[n] = 0;
-
- if (n==16) {
- /* parse out the name type,
- its always in the 16th byte of the name */
- name->name_type = ((uint8_t)name->name[15]) & 0xff;
-
- /* remove trailing spaces */
- name->name[15] = 0;
- n = 14;
- while (n && name->name[n]==' ')
- name->name[n--] = 0;
- }
-
- /* now the domain parts (if any) */
- n = 0;
- while (ubuf[offset]) {
- /* we can have pointers within the domain part as well */
- if (!handle_name_ptrs(ubuf,&offset,length,&got_pointer,&ret))
- return(0);
-
- m = ubuf[offset];
- /*
- * Don't allow null domain parts.
- */
- if (!m)
- return(0);
- if (!got_pointer)
- ret += m+1;
- if (n)
- name->scope[n++] = '.';
- if (m+2+offset>length || n+m+1>sizeof(name->scope))
- return(0);
- offset++;
- while (m--)
- name->scope[n++] = (char)ubuf[offset++];
-
- /*
- * Watch for malicious loops.
- */
- if (loop_count++ == 10)
- return 0;
- }
- name->scope[n++] = 0;
-
- return(ret);
-}
-
-
-/*******************************************************************
- put a compressed nmb name into a buffer. return the length of the
- compressed name
-
- compressed names are really weird. The "compression" doubles the
- size. The idea is that it also means that compressed names conform
- to the doman name system. See RFC1002.
- ******************************************************************/
-static int put_nmb_name(char *buf,int offset,struct nmb_name *name)
-{
- int ret,m;
- fstring buf1;
- char *p;
-
- if (strcmp(name->name,"*") == 0) {
- /* special case for wildcard name */
- memset(buf1,'\0',20);
- buf1[0] = '*';
- buf1[15] = name->name_type;
- } else {
- slprintf(buf1, sizeof(buf1) - 1,"%-15.15s%c",name->name,name->name_type);
- }
-
- buf[offset] = 0x20;
-
- ret = 34;
-
- for (m=0;m<16;m++) {
- buf[offset+1+2*m] = 'A' + ((buf1[m]>>4)&0xF);
- buf[offset+2+2*m] = 'A' + (buf1[m]&0xF);
- }
- offset += 33;
-
- buf[offset] = 0;
-
- if (name->scope[0]) {
- /* XXXX this scope handling needs testing */
- ret += strlen(name->scope) + 1;
- pstrcpy(&buf[offset+1],name->scope);
-
- p = &buf[offset+1];
- while ((p = strchr_m(p,'.'))) {
- buf[offset] = PTR_DIFF(p,&buf[offset+1]);
- offset += (buf[offset] + 1);
- p = &buf[offset+1];
- }
- buf[offset] = strlen(&buf[offset+1]);
- }
-
- return(ret);
-}
-
-/*******************************************************************
- useful for debugging messages
- ******************************************************************/
-char *nmb_namestr(struct nmb_name *n)
-{
- static int i=0;
- static fstring ret[4];
- char *p = ret[i];
-
- if (!n->scope[0])
- slprintf(p,sizeof(fstring)-1, "%s<%02x>",n->name,n->name_type);
- else
- slprintf(p,sizeof(fstring)-1, "%s<%02x>.%s",n->name,n->name_type,n->scope);
-
- i = (i+1)%4;
- return(p);
-}
-
-/*******************************************************************
- allocate and parse some resource records
- ******************************************************************/
-static BOOL parse_alloc_res_rec(char *inbuf,int *offset,int length,
- struct res_rec **recs, int count)
-{
- int i;
- *recs = malloc_array_p(struct res_rec, count);
- if (!*recs) return(False);
-
- memset((char *)*recs,'\0',sizeof(**recs)*count);
-
- for (i=0;i<count;i++) {
- int l = parse_nmb_name(inbuf,*offset,length,&(*recs)[i].rr_name);
- (*offset) += l;
- if (!l || (*offset)+10 > length) {
- SAFE_FREE(*recs);
- return(False);
- }
- (*recs)[i].rr_type = RSVAL(inbuf,(*offset));
- (*recs)[i].rr_class = RSVAL(inbuf,(*offset)+2);
- (*recs)[i].ttl = RIVAL(inbuf,(*offset)+4);
- (*recs)[i].rdlength = RSVAL(inbuf,(*offset)+8);
- (*offset) += 10;
- if ((*recs)[i].rdlength>sizeof((*recs)[i].rdata) ||
- (*offset)+(*recs)[i].rdlength > length) {
- SAFE_FREE(*recs);
- return(False);
- }
- memcpy((*recs)[i].rdata,inbuf+(*offset),(*recs)[i].rdlength);
- (*offset) += (*recs)[i].rdlength;
- }
- return(True);
-}
-
-/*******************************************************************
- put a resource record into a packet
- ******************************************************************/
-static int put_res_rec(char *buf,int offset,struct res_rec *recs,int count)
-{
- int ret=0;
- int i;
-
- for (i=0;i<count;i++) {
- int l = put_nmb_name(buf,offset,&recs[i].rr_name);
- offset += l;
- ret += l;
- RSSVAL(buf,offset,recs[i].rr_type);
- RSSVAL(buf,offset+2,recs[i].rr_class);
- RSIVAL(buf,offset+4,recs[i].ttl);
- RSSVAL(buf,offset+8,recs[i].rdlength);
- memcpy(buf+offset+10,recs[i].rdata,recs[i].rdlength);
- offset += 10+recs[i].rdlength;
- ret += 10+recs[i].rdlength;
- }
-
- return(ret);
-}
-
-/*******************************************************************
- put a compressed name pointer record into a packet
- ******************************************************************/
-static int put_compressed_name_ptr(uint8_t *buf,int offset,struct res_rec *rec,int ptr_offset)
-{
- int ret=0;
- buf[offset] = (0xC0 | ((ptr_offset >> 8) & 0xFF));
- buf[offset+1] = (ptr_offset & 0xFF);
- offset += 2;
- ret += 2;
- RSSVAL(buf,offset,rec->rr_type);
- RSSVAL(buf,offset+2,rec->rr_class);
- RSIVAL(buf,offset+4,rec->ttl);
- RSSVAL(buf,offset+8,rec->rdlength);
- memcpy(buf+offset+10,rec->rdata,rec->rdlength);
- offset += 10+rec->rdlength;
- ret += 10+rec->rdlength;
-
- return(ret);
-}
-
-/*******************************************************************
- parse a dgram packet. Return False if the packet can't be parsed
- or is invalid for some reason, True otherwise
-
- this is documented in section 4.4.1 of RFC1002
- ******************************************************************/
-static BOOL parse_dgram(char *inbuf,int length,struct dgram_packet *dgram)
-{
- int offset;
- int flags;
-
- memset((char *)dgram,'\0',sizeof(*dgram));
-
- if (length < 14) return(False);
-
- dgram->header.msg_type = CVAL(inbuf,0);
- flags = CVAL(inbuf,1);
- dgram->header.flags.node_type = (enum node_type)((flags>>2)&3);
- if (flags & 1) dgram->header.flags.more = True;
- if (flags & 2) dgram->header.flags.first = True;
- dgram->header.dgm_id = RSVAL(inbuf,2);
- putip((char *)&dgram->header.source_ip,inbuf+4);
- dgram->header.source_port = RSVAL(inbuf,8);
- dgram->header.dgm_length = RSVAL(inbuf,10);
- dgram->header.packet_offset = RSVAL(inbuf,12);
-
- offset = 14;
-
- if (dgram->header.msg_type == 0x10 ||
- dgram->header.msg_type == 0x11 ||
- dgram->header.msg_type == 0x12) {
- offset += parse_nmb_name(inbuf,offset,length,&dgram->source_name);
- offset += parse_nmb_name(inbuf,offset,length,&dgram->dest_name);
- }
-
- if (offset >= length || (length-offset > sizeof(dgram->data)))
- return(False);
-
- dgram->datasize = length-offset;
- memcpy(dgram->data,inbuf+offset,dgram->datasize);
-
- return(True);
-}
-
-
-/*******************************************************************
- parse a nmb packet. Return False if the packet can't be parsed
- or is invalid for some reason, True otherwise
- ******************************************************************/
-static BOOL parse_nmb(char *inbuf,int length,struct nmb_packet *nmb)
-{
- int nm_flags,offset;
-
- memset((char *)nmb,'\0',sizeof(*nmb));
-
- if (length < 12) return(False);
-
- /* parse the header */
- nmb->header.name_trn_id = RSVAL(inbuf,0);
-
- DEBUG(10,("parse_nmb: packet id = %d\n", nmb->header.name_trn_id));
-
- nmb->header.opcode = (CVAL(inbuf,2) >> 3) & 0xF;
- nmb->header.response = ((CVAL(inbuf,2)>>7)&1)?True:False;
- nm_flags = ((CVAL(inbuf,2) & 0x7) << 4) + (CVAL(inbuf,3)>>4);
- nmb->header.nm_flags.bcast = (nm_flags&1)?True:False;
- nmb->header.nm_flags.recursion_available = (nm_flags&8)?True:False;
- nmb->header.nm_flags.recursion_desired = (nm_flags&0x10)?True:False;
- nmb->header.nm_flags.trunc = (nm_flags&0x20)?True:False;
- nmb->header.nm_flags.authoritative = (nm_flags&0x40)?True:False;
- nmb->header.rcode = CVAL(inbuf,3) & 0xF;
- nmb->header.qdcount = RSVAL(inbuf,4);
- nmb->header.ancount = RSVAL(inbuf,6);
- nmb->header.nscount = RSVAL(inbuf,8);
- nmb->header.arcount = RSVAL(inbuf,10);
-
- if (nmb->header.qdcount) {
- offset = parse_nmb_name(inbuf,12,length,&nmb->question.question_name);
- if (!offset) return(False);
-
- if (length - (12+offset) < 4) return(False);
- nmb->question.question_type = RSVAL(inbuf,12+offset);
- nmb->question.question_class = RSVAL(inbuf,12+offset+2);
-
- offset += 12+4;
- } else {
- offset = 12;
- }
-
- /* and any resource records */
- if (nmb->header.ancount &&
- !parse_alloc_res_rec(inbuf,&offset,length,&nmb->answers,
- nmb->header.ancount))
- return(False);
-
- if (nmb->header.nscount &&
- !parse_alloc_res_rec(inbuf,&offset,length,&nmb->nsrecs,
- nmb->header.nscount))
- return(False);
-
- if (nmb->header.arcount &&
- !parse_alloc_res_rec(inbuf,&offset,length,&nmb->additional,
- nmb->header.arcount))
- return(False);
-
- return(True);
-}
-
-/*******************************************************************
- 'Copy constructor' for an nmb packet
- ******************************************************************/
-static struct packet_struct *copy_nmb_packet(struct packet_struct *packet)
-{
- struct nmb_packet *nmb;
- struct nmb_packet *copy_nmb;
- struct packet_struct *pkt_copy;
-
- if(( pkt_copy = malloc_p(struct packet_struct)) == NULL)
- {
- DEBUG(0,("copy_nmb_packet: malloc fail.\n"));
- return NULL;
- }
-
- /* Structure copy of entire thing. */
-
- *pkt_copy = *packet;
-
- /* Ensure this copy is not locked. */
- pkt_copy->locked = False;
-
- /* Ensure this copy has no resource records. */
- nmb = &packet->packet.nmb;
- copy_nmb = &pkt_copy->packet.nmb;
-
- copy_nmb->answers = NULL;
- copy_nmb->nsrecs = NULL;
- copy_nmb->additional = NULL;
-
- /* Now copy any resource records. */
-
- if (nmb->answers)
- {
- if((copy_nmb->answers = malloc_array_p(struct res_rec, nmb->header.ancount)) == NULL)
- goto free_and_exit;
- memcpy((char *)copy_nmb->answers, (char *)nmb->answers,
- nmb->header.ancount * sizeof(struct res_rec));
- }
- if (nmb->nsrecs)
- {
- if((copy_nmb->nsrecs = malloc_array_p(struct res_rec, nmb->header.nscount)) == NULL)
- goto free_and_exit;
- memcpy((char *)copy_nmb->nsrecs, (char *)nmb->nsrecs,
- nmb->header.nscount * sizeof(struct res_rec));
- }
- if (nmb->additional)
- {
- if((copy_nmb->additional = malloc_array_p(struct res_rec, nmb->header.arcount)) == NULL)
- goto free_and_exit;
- memcpy((char *)copy_nmb->additional, (char *)nmb->additional,
- nmb->header.arcount * sizeof(struct res_rec));
- }
-
- return pkt_copy;
-
-free_and_exit:
-
- SAFE_FREE(copy_nmb->answers);
- SAFE_FREE(copy_nmb->nsrecs);
- SAFE_FREE(copy_nmb->additional);
- SAFE_FREE(pkt_copy);
-
- DEBUG(0,("copy_nmb_packet: malloc fail in resource records.\n"));
- return NULL;
-}
-
-/*******************************************************************
- 'Copy constructor' for a dgram packet
- ******************************************************************/
-static struct packet_struct *copy_dgram_packet(struct packet_struct *packet)
-{
- struct packet_struct *pkt_copy;
-
- if(( pkt_copy = malloc_p(struct packet_struct)) == NULL)
- {
- DEBUG(0,("copy_dgram_packet: malloc fail.\n"));
- return NULL;
- }
-
- /* Structure copy of entire thing. */
-
- *pkt_copy = *packet;
-
- /* Ensure this copy is not locked. */
- pkt_copy->locked = False;
-
- /* There are no additional pointers in a dgram packet,
- we are finished. */
- return pkt_copy;
-}
-
-/*******************************************************************
- 'Copy constructor' for a generic packet
- ******************************************************************/
-struct packet_struct *copy_packet(struct packet_struct *packet)
-{
- if(packet->packet_type == NMB_PACKET)
- return copy_nmb_packet(packet);
- else if (packet->packet_type == DGRAM_PACKET)
- return copy_dgram_packet(packet);
- return NULL;
-}
-
-/*******************************************************************
- free up any resources associated with an nmb packet
- ******************************************************************/
-static void free_nmb_packet(struct nmb_packet *nmb)
-{
- SAFE_FREE(nmb->answers);
- SAFE_FREE(nmb->nsrecs);
- SAFE_FREE(nmb->additional);
-}
-
-/*******************************************************************
- free up any resources associated with a dgram packet
- ******************************************************************/
-static void free_dgram_packet(struct dgram_packet *nmb)
-{
- /* We have nothing to do for a dgram packet. */
-}
-
-/*******************************************************************
- free up any resources associated with a packet
- ******************************************************************/
-void free_packet(struct packet_struct *packet)
-{
- if (packet->locked)
- return;
- if (packet->packet_type == NMB_PACKET)
- free_nmb_packet(&packet->packet.nmb);
- else if (packet->packet_type == DGRAM_PACKET)
- free_dgram_packet(&packet->packet.dgram);
- ZERO_STRUCTPN(packet);
- SAFE_FREE(packet);
-}
-
-/*******************************************************************
-parse a packet buffer into a packet structure
- ******************************************************************/
-struct packet_struct *parse_packet(char *buf,int length,
- enum packet_type packet_type)
-{
- struct packet_struct *p;
- BOOL ok=False;
-
- p = malloc_p(struct packet_struct);
- if (!p) return(NULL);
-
- p->next = NULL;
- p->prev = NULL;
- p->locked = False;
- p->timestamp = time(NULL);
- p->packet_type = packet_type;
-
- switch (packet_type) {
- case NMB_PACKET:
- ok = parse_nmb(buf,length,&p->packet.nmb);
- break;
-
- case DGRAM_PACKET:
- ok = parse_dgram(buf,length,&p->packet.dgram);
- break;
- }
-
- if (!ok) {
- free_packet(p);
- return NULL;
- }
-
- return p;
-}
-
-/*******************************************************************
- read a packet from a socket and parse it, returning a packet ready
- to be used or put on the queue. This assumes a UDP socket
- ******************************************************************/
-struct packet_struct *read_packet(int fd,enum packet_type packet_type)
-{
- struct packet_struct *packet;
- char buf[MAX_DGRAM_SIZE];
- int length;
- struct ipv4_addr addr;
- int port;
-
- length = read_udp_socket(fd, buf, sizeof(buf), &addr, &port);
- if (length < MIN_DGRAM_SIZE) return(NULL);
-
- packet = parse_packet(buf, length, packet_type);
- if (!packet) return NULL;
-
- packet->fd = fd;
- packet->ip = addr;
- packet->port = port;
-
- DEBUG(5,("Received a packet of len %d from (%s) port %d\n",
- length, sys_inet_ntoa(packet->ip), packet->port));
-
- return packet;
-}
-
-
-/*******************************************************************
- send a udp packet on a already open socket
- ******************************************************************/
-static BOOL send_udp(int fd,char *buf,int len,struct ipv4_addr ip,int port)
-{
- BOOL ret = False;
- int i;
- struct sockaddr_in sock_out;
-
- /* set the address and port */
- memset((char *)&sock_out,'\0',sizeof(sock_out));
- putip((char *)&sock_out.sin_addr,(char *)&ip);
- sock_out.sin_port = htons( port );
- sock_out.sin_family = AF_INET;
-
- DEBUG( 5, ( "Sending a packet of len %d to (%s) on port %d\n",
- len, sys_inet_ntoa(ip), port ) );
-
- /*
- * Patch to fix asynch error notifications from Linux kernel.
- */
-
- for (i = 0; i < 5; i++) {
- ret = (sendto(fd,buf,len,0,(struct sockaddr *)&sock_out, sizeof(sock_out)) >= 0);
- if (ret || errno != ECONNREFUSED)
- break;
- }
-
- if (!ret)
- DEBUG(0,("Packet send failed to %s(%d) ERRNO=%s\n",
- sys_inet_ntoa(ip),port,strerror(errno)));
-
- return(ret);
-}
-
-/*******************************************************************
- build a dgram packet ready for sending
-
- XXXX This currently doesn't handle packets too big for one
- datagram. It should split them and use the packet_offset, more and
- first flags to handle the fragmentation. Yuck.
-
- [...but it isn't clear that we would ever need to send a
- a fragmented NBT Datagram. The IP layer does its own
- fragmentation to ensure that messages can fit into the path
- MTU. It *is* important to be able to receive and rebuild
- fragmented NBT datagrams, just in case someone out there
- really has implemented this 'feature'. crh -)------ ]
-
- ******************************************************************/
-static int build_dgram(char *buf,struct packet_struct *p)
-{
- struct dgram_packet *dgram = &p->packet.dgram;
- uint8_t *ubuf = (uint8_t *)buf;
- int offset=0;
-
- /* put in the header */
- ubuf[0] = dgram->header.msg_type;
- ubuf[1] = (((int)dgram->header.flags.node_type)<<2);
- if (dgram->header.flags.more) ubuf[1] |= 1;
- if (dgram->header.flags.first) ubuf[1] |= 2;
- RSSVAL(ubuf,2,dgram->header.dgm_id);
- putip(ubuf+4,(char *)&dgram->header.source_ip);
- RSSVAL(ubuf,8,dgram->header.source_port);
- RSSVAL(ubuf,12,dgram->header.packet_offset);
-
- offset = 14;
-
- if (dgram->header.msg_type == 0x10 ||
- dgram->header.msg_type == 0x11 ||
- dgram->header.msg_type == 0x12) {
- offset += put_nmb_name((char *)ubuf,offset,&dgram->source_name);
- offset += put_nmb_name((char *)ubuf,offset,&dgram->dest_name);
- }
-
- memcpy(ubuf+offset,dgram->data,dgram->datasize);
- offset += dgram->datasize;
-
- /* automatically set the dgm_length
- * NOTE: RFC1002 says the dgm_length does *not*
- * include the fourteen-byte header. crh
- */
- dgram->header.dgm_length = (offset - 14);
- RSSVAL(ubuf,10,dgram->header.dgm_length);
-
- return(offset);
-}
-
-/*******************************************************************
- Build a nmb name
-*******************************************************************/
-
-void make_nmb_name( struct nmb_name *n, const char *name, int type)
-{
- memset( (char *)n, '\0', sizeof(struct nmb_name) );
- push_ascii(n->name, name, 16, STR_TERMINATE|STR_UPPER);
- n->name_type = (uint_t)type & 0xFF;
- StrnCpy( n->scope, lp_netbios_scope(), 63 );
- strupper( n->scope );
-}
-
-/*******************************************************************
- Compare two nmb names
- ******************************************************************/
-
-BOOL nmb_name_equal(struct nmb_name *n1, struct nmb_name *n2)
-{
- return ((n1->name_type == n2->name_type) &&
- strequal(n1->name ,n2->name ) &&
- strequal(n1->scope,n2->scope));
-}
-
-/*******************************************************************
- build a nmb packet ready for sending
-
- XXXX this currently relies on not being passed something that expands
- to a packet too big for the buffer. Eventually this should be
- changed to set the trunc bit so the receiver can request the rest
- via tcp (when that becomes supported)
- ******************************************************************/
-static int build_nmb(char *buf,struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- uint8_t *ubuf = (uint8_t *)buf;
- int offset=0;
-
- /* put in the header */
- RSSVAL(ubuf,offset,nmb->header.name_trn_id);
- ubuf[offset+2] = (nmb->header.opcode & 0xF) << 3;
- if (nmb->header.response) ubuf[offset+2] |= (1<<7);
- if (nmb->header.nm_flags.authoritative &&
- nmb->header.response) ubuf[offset+2] |= 0x4;
- if (nmb->header.nm_flags.trunc) ubuf[offset+2] |= 0x2;
- if (nmb->header.nm_flags.recursion_desired) ubuf[offset+2] |= 0x1;
- if (nmb->header.nm_flags.recursion_available &&
- nmb->header.response) ubuf[offset+3] |= 0x80;
- if (nmb->header.nm_flags.bcast) ubuf[offset+3] |= 0x10;
- ubuf[offset+3] |= (nmb->header.rcode & 0xF);
-
- RSSVAL(ubuf,offset+4,nmb->header.qdcount);
- RSSVAL(ubuf,offset+6,nmb->header.ancount);
- RSSVAL(ubuf,offset+8,nmb->header.nscount);
- RSSVAL(ubuf,offset+10,nmb->header.arcount);
-
- offset += 12;
- if (nmb->header.qdcount) {
- /* XXXX this doesn't handle a qdcount of > 1 */
- offset += put_nmb_name((char *)ubuf,offset,&nmb->question.question_name);
- RSSVAL(ubuf,offset,nmb->question.question_type);
- RSSVAL(ubuf,offset+2,nmb->question.question_class);
- offset += 4;
- }
-
- if (nmb->header.ancount)
- offset += put_res_rec((char *)ubuf,offset,nmb->answers,
- nmb->header.ancount);
-
- if (nmb->header.nscount)
- offset += put_res_rec((char *)ubuf,offset,nmb->nsrecs,
- nmb->header.nscount);
-
- /*
- * The spec says we must put compressed name pointers
- * in the following outgoing packets :
- * NAME_REGISTRATION_REQUEST, NAME_REFRESH_REQUEST,
- * NAME_RELEASE_REQUEST.
- */
-
- if((nmb->header.response == False) &&
- ((nmb->header.opcode == NMB_NAME_REG_OPCODE) ||
- (nmb->header.opcode == NMB_NAME_RELEASE_OPCODE) ||
- (nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_8) ||
- (nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_9) ||
- (nmb->header.opcode == NMB_NAME_MULTIHOMED_REG_OPCODE)) &&
- (nmb->header.arcount == 1)) {
-
- offset += put_compressed_name_ptr(ubuf,offset,nmb->additional,12);
-
- } else if (nmb->header.arcount) {
- offset += put_res_rec((char *)ubuf,offset,nmb->additional,
- nmb->header.arcount);
- }
- return(offset);
-}
-
-
-/*******************************************************************
-linearise a packet
- ******************************************************************/
-int build_packet(char *buf, struct packet_struct *p)
-{
- int len = 0;
-
- switch (p->packet_type) {
- case NMB_PACKET:
- len = build_nmb(buf,p);
- break;
-
- case DGRAM_PACKET:
- len = build_dgram(buf,p);
- break;
- }
-
- return len;
-}
-
-/*******************************************************************
- send a packet_struct
- ******************************************************************/
-BOOL send_packet(struct packet_struct *p)
-{
- char buf[1024];
- int len=0;
-
- memset(buf,'\0',sizeof(buf));
-
- len = build_packet(buf, p);
-
- if (!len) return(False);
-
- return(send_udp(p->fd,buf,len,p->ip,p->port));
-}
-
-/****************************************************************************
- receive a packet with timeout on a open UDP filedescriptor
- The timeout is in milliseconds
- ***************************************************************************/
-struct packet_struct *receive_packet(int fd,enum packet_type type,int t)
-{
- fd_set fds;
- struct timeval timeout;
- int ret;
-
- FD_ZERO(&fds);
- FD_SET(fd,&fds);
- timeout.tv_sec = t/1000;
- timeout.tv_usec = 1000*(t%1000);
-
- if ((ret = sys_select_intr(fd+1,&fds,NULL,NULL,&timeout)) == -1) {
- /* errno should be EBADF or EINVAL. */
- DEBUG(0,("select returned -1, errno = %s (%d)\n", strerror(errno), errno));
- return NULL;
- }
-
- if (ret == 0) /* timeout */
- return NULL;
-
- if (FD_ISSET(fd,&fds))
- return(read_packet(fd,type));
-
- return(NULL);
-}
-
-
-/****************************************************************************
- receive a UDP/137 packet either via UDP or from the unexpected packet
- queue. The packet must be a reply packet and have the specified trn_id
- The timeout is in milliseconds
- ***************************************************************************/
-struct packet_struct *receive_nmb_packet(int fd, int t, int trn_id)
-{
- struct packet_struct *p;
-
- p = receive_packet(fd, NMB_PACKET, t);
-
- if (p && p->packet.nmb.header.response &&
- p->packet.nmb.header.name_trn_id == trn_id) {
- return p;
- }
- if (p) free_packet(p);
-
- /* try the unexpected packet queue */
- return receive_unexpected(NMB_PACKET, trn_id, NULL);
-}
-
-/****************************************************************************
- receive a UDP/138 packet either via UDP or from the unexpected packet
- queue. The packet must be a reply packet and have the specified mailslot name
- The timeout is in milliseconds
- ***************************************************************************/
-struct packet_struct *receive_dgram_packet(int fd, int t, const char *mailslot_name)
-{
- struct packet_struct *p;
-
- p = receive_packet(fd, DGRAM_PACKET, t);
-
- if (p && match_mailslot_name(p, mailslot_name)) {
- return p;
- }
- if (p) free_packet(p);
-
- /* try the unexpected packet queue */
- return receive_unexpected(DGRAM_PACKET, 0, mailslot_name);
-}
-
-
-/****************************************************************************
- see if a datagram has the right mailslot name
-***************************************************************************/
-BOOL match_mailslot_name(struct packet_struct *p, const char *mailslot_name)
-{
- struct dgram_packet *dgram = &p->packet.dgram;
- char *buf;
-
- buf = &dgram->data[0];
- buf -= 4;
-
- buf = smb_buf(buf);
-
- if (memcmp(buf, mailslot_name, strlen(mailslot_name)+1) == 0) {
- return True;
- }
-
- return False;
-}
-
-
-/****************************************************************************
-return the number of bits that match between two 4 character buffers
- ***************************************************************************/
-int matching_quad_bits(uint8_t *p1, uint8_t *p2)
-{
- int i, j, ret = 0;
- for (i=0; i<4; i++) {
- if (p1[i] != p2[i]) break;
- ret += 8;
- }
-
- if (i==4) return ret;
-
- for (j=0; j<8; j++) {
- if ((p1[i] & (1<<(7-j))) != (p2[i] & (1<<(7-j)))) break;
- ret++;
- }
-
- return ret;
-}
-
-
-static uint8_t sort_ip[4];
-
-/****************************************************************************
-compare two query reply records
- ***************************************************************************/
-static int name_query_comp(uint8_t *p1, uint8_t *p2)
-{
- return matching_quad_bits(p2+2, sort_ip) - matching_quad_bits(p1+2, sort_ip);
-}
-
-/****************************************************************************
-sort a set of 6 byte name query response records so that the IPs that
-have the most leading bits in common with the specified address come first
- ***************************************************************************/
-void sort_query_replies(char *data, int n, struct ipv4_addr ip)
-{
- if (n <= 1) return;
-
- putip(sort_ip, (char *)&ip);
-
- qsort(data, n, 6, QSORT_CAST name_query_comp);
-}
-
-
-#define TRUNCATE_NETBIOS_NAME 1
-
-/*******************************************************************
- convert, possibly using a stupid microsoft-ism which has destroyed
- the transport independence of netbios (for CIFS vendors that usually
- use the Win95-type methods, not for NT to NT communication, which uses
- DCE/RPC and therefore full-length unicode strings...) a dns name into
- a netbios name.
-
- the netbios name (NOT necessarily null-terminated) is truncated to 15
- characters.
-
- ******************************************************************/
-char *dns_to_netbios_name(char *dns_name)
-{
- static char netbios_name[16];
- int i;
- StrnCpy(netbios_name, dns_name, 15);
- netbios_name[15] = 0;
-
-#ifdef TRUNCATE_NETBIOS_NAME
- /* ok. this is because of a stupid microsoft-ism. if the called host
- name contains a '.', microsoft clients expect you to truncate the
- netbios name up to and including the '.' this even applies, by
- mistake, to workgroup (domain) names, which is _really_ daft.
- */
- for (i = 15; i >= 0; i--)
- {
- if (netbios_name[i] == '.')
- {
- netbios_name[i] = 0;
- break;
- }
- }
-#endif /* TRUNCATE_NETBIOS_NAME */
-
- return netbios_name;
-}
-
-
-/****************************************************************************
-interpret the weird netbios "name". Return the name type
-****************************************************************************/
-static int name_interpret(char *in,char *out)
-{
- int ret;
- int len = (*in++) / 2;
-
- *out=0;
-
- if (len > 30 || len<1) return(0);
-
- while (len--)
- {
- if (in[0] < 'A' || in[0] > 'P' || in[1] < 'A' || in[1] > 'P') {
- *out = 0;
- return(0);
- }
- *out = ((in[0]-'A')<<4) + (in[1]-'A');
- in += 2;
- out++;
- }
- *out = 0;
- ret = out[-1];
-
-#ifdef NETBIOS_SCOPE
- /* Handle any scope names */
- while(*in)
- {
- *out++ = '.'; /* Scope names are separated by periods */
- len = *(uint8_t *)in++;
- StrnCpy(out, in, len);
- out += len;
- *out=0;
- in += len;
- }
-#endif
- return(ret);
-}
-
-
-/****************************************************************************
-return the number of bytes that would be occupied by the result of
-name_mangle()
-****************************************************************************/
-uint_t nbt_mangled_name_len(void)
-{
- const char *scope = lp_netbios_scope();
- uint_t ret = 34;
- if (scope && *scope) {
- ret += strlen(scope) + 1;
- }
- return ret;
-}
-
-/****************************************************************************
-mangle a name into netbios format
-
- Note: <Out> must be nbt_mangled_name_len() in length
-****************************************************************************/
-int name_mangle(char *In, char *Out, char name_type)
-{
- int i;
- int c;
- int len;
- char buf[20];
- char *p = Out;
- const char *scope = lp_netbios_scope();
-
- /* Safely copy the input string, In, into buf[]. */
- memset( buf, 0, 20 );
- if (strcmp(In,"*") == 0) {
- buf[0] = '*';
- } else {
- slprintf( buf, sizeof(buf) - 1, "%-15.15s%c", In, name_type);
- }
-
- /* Place the length of the first field into the output buffer. */
- p[0] = 32;
- p++;
-
- /* Now convert the name to the rfc1001/1002 format. */
- for ( i = 0; i < 16; i++ ) {
- c = toupper( buf[i] );
- p[i*2] = ( (c >> 4) & 0xF ) + 'A';
- p[(i*2)+1] = (c & 0xF) + 'A';
- }
- p += 32;
- p[0] = '\0';
-
- if (!scope || !*scope) {
- return name_len(Out);
- }
-
- /* Add the scope string. */
- for (i = 0, len = 0; scope[i]; i++, len++) {
- switch(scope[i]) {
- case '.':
- p[0] = len;
- p += (len + 1);
- len = -1;
- break;
- default:
- p[len+1] = scope[i];
- break;
- }
- }
-
- p[0] = len;
- if (len > 0) {
- p[len+1] = 0;
- }
-
- return name_len(Out);
-}
-
-/****************************************************************************
-find a pointer to a netbios name
-****************************************************************************/
-static char *name_ptr(char *buf,int ofs)
-{
- uint8_t c = *(uint8_t *)(buf+ofs);
-
- if ((c & 0xC0) == 0xC0)
- {
- uint16_t l = RSVAL(buf, ofs) & 0x3FFF;
- DEBUG(5,("name ptr to pos %d from %d is %s\n",l,ofs,buf+l));
- return(buf + l);
- }
- else
- return(buf+ofs);
-}
-
-/****************************************************************************
-extract a netbios name from a buf
-****************************************************************************/
-int name_extract(char *buf,int ofs,char *name)
-{
- char *p = name_ptr(buf,ofs);
- int d = PTR_DIFF(p,buf+ofs);
- pstrcpy(name,"");
- if (d < -50 || d > 50) return(0);
- return(name_interpret(p,name));
-}
-
-/****************************************************************************
-return the total storage length of a mangled name
-****************************************************************************/
-int name_len(char *s1)
-{
- /* NOTE: this argument _must_ be unsigned */
- uint8_t *s = (uint8_t *)s1;
- int len;
-
- /* If the two high bits of the byte are set, return 2. */
- if (0xC0 == (*s & 0xC0))
- return(2);
-
- /* Add up the length bytes. */
- for (len = 1; (*s); s += (*s) + 1) {
- len += *s + 1;
- SMB_ASSERT(len < 80);
- }
-
- return(len);
-} /* name_len */
-
-
-/*
- choose a name to use when calling a server in a NBT session request.
- we use heuristics to see if the name we have been given is a IP
- address, or a too-long name. If it is then use *SMBSERVER, or a
- truncated name
-*/
-void choose_called_name(struct nmb_name *n, const char *name, int type)
-{
- if (is_ipaddress(name)) {
- make_nmb_name(n, "*SMBSERVER", type);
- return;
- }
- if (strlen(name) > 16) {
- const char *p = strchr(name, '.');
- char name2[17];
- if (p - name > 16) {
- make_nmb_name(n, "*SMBSERVER", type);
- return;
- }
- strlcpy(name2, name, 1+(p-name));
- make_nmb_name(n, name2, type);
- return;
- }
-
- /* looks OK */
- make_nmb_name(n, name, type);
-}
generated by cgit (git 2.34.1) at 2024-09-12 19:01:54 +0000