-/*
+/*
Unix SMB/CIFS implementation.
NBT netbios library routines
Copyright (C) Andrew Tridgell 1994-1998
-
+ Copyright (C) Jeremy Allison 2007
+
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 3 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, see <http://www.gnu.org/licenses/>.
-
+
*/
#include "includes.h"
-extern struct in_addr lastip;
-extern int lastport;
-
int num_good_sends = 0;
int num_good_receives = 0;
unsigned char 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 < MAX_NETBIOSNAME_LEN; j++) {
break;
DEBUGADD(4, ("%02X", (unsigned char)res->rdata[i+j]));
}
-
+
DEBUGADD(4, ("\n"));
}
}
struct nmb_packet *nmb = &p->packet.nmb;
if( DEBUGLVL( 4 ) ) {
- dbgtext( "nmb packet from %s(%d) header: id=%d opcode=%s(%d) response=%s\n",
+ dbgtext( "nmb packet from %s(%d) header: id=%d "
+ "opcode=%s(%d) response=%s\n",
inet_ntoa(p->ip), p->port,
nmb->header.name_trn_id,
lookup_opcode_name(nmb->header.opcode),
nmb->header.opcode,
BOOLSTR(nmb->header.response) );
- dbgtext( " header: flags: bcast=%s rec_avail=%s rec_des=%s trunc=%s auth=%s\n",
+ dbgtext( " 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) );
- dbgtext( " header: rcode=%d qdcount=%d ancount=%d nscount=%d arcount=%d\n",
+ dbgtext( " header: rcode=%d qdcount=%d ancount=%d "
+ "nscount=%d arcount=%d\n",
nmb->header.rcode,
nmb->header.qdcount,
nmb->header.ancount,
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);
+ if (loop_count++ == 10 ||
+ (*offset) < 0 || (*offset)>(length-2)) {
+ return False;
}
}
- return(True);
+ return True;
}
/*******************************************************************
int offset = ofs;
if (length - offset < 2)
- return(0);
+ return(0);
/* handle initial name pointers */
if (!handle_name_ptrs(ubuf,&offset,length,&got_pointer,&ret))
return(0);
-
+
m = ubuf[offset];
if (!m)
name->name[n] = 0;
if (n==MAX_NETBIOSNAME_LEN) {
- /* parse out the name type, its always in the 16th byte of the name */
+ /* parse out the name type, its always
+ * in the 16th byte of the name */
name->name_type = ((unsigned char)name->name[15]) & 0xff;
-
+
/* remove trailing spaces */
name->name[15] = 0;
n = 14;
while (n && name->name[n]==' ')
- name->name[n--] = 0;
+ name->name[n--] = 0;
}
/* now the domain parts (if any) */
if (loop_count++ == 10)
return 0;
}
- name->scope[n++] = 0;
+ name->scope[n++] = 0;
return(ret);
}
{
size_t len = strlen(name);
- memcpy(dest, name, (len < MAX_NETBIOSNAME_LEN) ? len : MAX_NETBIOSNAME_LEN - 1);
+ memcpy(dest, name, (len < MAX_NETBIOSNAME_LEN) ?
+ len : MAX_NETBIOSNAME_LEN - 1);
if (len < MAX_NETBIOSNAME_LEN - 1) {
memset(dest + len, pad, MAX_NETBIOSNAME_LEN - 1 - len);
}
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.
+
+ If buf == NULL this is a length calculation.
******************************************************************/
static int put_nmb_name(char *buf,int offset,struct nmb_name *name)
put_name(buf1, name->name, ' ', name->name_type);
}
- buf[offset] = 0x20;
+ if (buf) {
+ buf[offset] = 0x20;
+ }
ret = 34;
for (m=0;m<MAX_NETBIOSNAME_LEN;m++) {
- buf[offset+1+2*m] = 'A' + ((buf1[m]>>4)&0xF);
- buf[offset+2+2*m] = 'A' + (buf1[m]&0xF);
+ if (buf) {
+ 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 (buf) {
+ buf[offset] = 0;
+ }
if (name->scope[0]) {
/* XXXX this scope handling needs testing */
ret += strlen(name->scope) + 1;
- safe_strcpy(&buf[offset+1],name->scope,sizeof(name->scope));
-
- p = &buf[offset+1];
- while ((p = strchr_m(p,'.'))) {
- buf[offset] = PTR_DIFF(p,&buf[offset+1]);
- offset += (buf[offset] + 1);
+ if (buf) {
+ safe_strcpy(&buf[offset+1],name->scope,
+ sizeof(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]);
}
- buf[offset] = strlen(&buf[offset+1]);
}
- return(ret);
+ return ret;
}
/*******************************************************************
if (!n->scope[0])
slprintf(p,sizeof(fstring)-1, "%s<%02x>",name,n->name_type);
else
- slprintf(p,sizeof(fstring)-1, "%s<%02x>.%s",name,n->name_type,n->scope);
+ slprintf(p,sizeof(fstring)-1, "%s<%02x>.%s",
+ name,n->name_type,n->scope);
i = (i+1)%4;
return(p);
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);
+ int l = parse_nmb_name(inbuf,*offset,length,
+ &(*recs)[i].rr_name);
(*offset) += l;
if (!l || (*offset)+10 > length) {
SAFE_FREE(*recs);
(*recs)[i].ttl = RIVAL(inbuf,(*offset)+4);
(*recs)[i].rdlength = RSVAL(inbuf,(*offset)+8);
(*offset) += 10;
- if ((*recs)[i].rdlength>sizeof((*recs)[i].rdata) ||
+ 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;
+ (*offset) += (*recs)[i].rdlength;
}
return(True);
}
/*******************************************************************
Put a resource record into a packet.
+ If buf == NULL this is a length calculation.
******************************************************************/
static int put_res_rec(char *buf,int offset,struct res_rec *recs,int count)
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);
+ if (buf) {
+ 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);
+ return ret;
}
/*******************************************************************
Put a compressed name pointer record into a packet.
+ If buf == NULL this is a length calculation.
******************************************************************/
-static int put_compressed_name_ptr(unsigned char *buf,int offset,struct res_rec *rec,int ptr_offset)
-{
+static int put_compressed_name_ptr(unsigned char *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);
+ if (buf) {
+ 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);
+ if (buf) {
+ 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);
+
+ return ret;
}
/*******************************************************************
- Parse a dgram packet. Return False if the packet can't be parsed
+ 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.
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);
+ 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)))
+ if (offset >= length || (length-offset > sizeof(dgram->data)))
return(False);
dgram->datasize = length-offset;
memcpy(dgram->data,inbuf+offset,dgram->datasize);
/* Paranioa. Ensure the last 2 bytes in the dgram buffer are
- zero. This should be true anyway, just enforce it for paranioa sake. JRA. */
+ zero. This should be true anyway, just enforce it for
+ paranioa sake. JRA. */
SMB_ASSERT(dgram->datasize <= (sizeof(dgram->data)-2));
memset(&dgram->data[sizeof(dgram->data)-2], '\0', 2);
}
/*******************************************************************
- Parse a nmb packet. Return False if the packet can't be parsed
+ Parse a nmb packet. Return False if the packet can't be parsed
or is invalid for some reason, True otherwise.
******************************************************************/
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.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);
+ offset = parse_nmb_name(inbuf,12,length,
+ &nmb->question.question_name);
if (!offset)
return(False);
}
/* and any resource records */
- if (nmb->header.ancount && !parse_alloc_res_rec(inbuf,&offset,length,&nmb->answers,
+ 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,
+ 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))
+
+ if (nmb->header.arcount &&
+ !parse_alloc_res_rec(inbuf,&offset,length,
+ &nmb->additional, nmb->header.arcount))
return(False);
return(True);
******************************************************************/
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;
/* Now copy any resource records. */
if (nmb->answers) {
- if((copy_nmb->answers = SMB_MALLOC_ARRAY(struct res_rec,nmb->header.ancount)) == NULL)
+ if((copy_nmb->answers = SMB_MALLOC_ARRAY(
+ struct res_rec,nmb->header.ancount)) == NULL)
goto free_and_exit;
- memcpy((char *)copy_nmb->answers, (char *)nmb->answers,
+ memcpy((char *)copy_nmb->answers, (char *)nmb->answers,
nmb->header.ancount * sizeof(struct res_rec));
}
if (nmb->nsrecs) {
- if((copy_nmb->nsrecs = SMB_MALLOC_ARRAY(struct res_rec, nmb->header.nscount)) == NULL)
+ if((copy_nmb->nsrecs = SMB_MALLOC_ARRAY(
+ struct res_rec, nmb->header.nscount)) == NULL)
goto free_and_exit;
- memcpy((char *)copy_nmb->nsrecs, (char *)nmb->nsrecs,
+ memcpy((char *)copy_nmb->nsrecs, (char *)nmb->nsrecs,
nmb->header.nscount * sizeof(struct res_rec));
}
if (nmb->additional) {
- if((copy_nmb->additional = SMB_MALLOC_ARRAY(struct res_rec, nmb->header.arcount)) == NULL)
+ if((copy_nmb->additional = SMB_MALLOC_ARRAY(
+ struct res_rec, nmb->header.arcount)) == NULL)
goto free_and_exit;
- memcpy((char *)copy_nmb->additional, (char *)nmb->additional,
+ memcpy((char *)copy_nmb->additional, (char *)nmb->additional,
nmb->header.arcount * sizeof(struct res_rec));
}
******************************************************************/
static struct packet_struct *copy_dgram_packet(struct packet_struct *packet)
-{
+{
struct packet_struct *pkt_copy;
if(( pkt_copy = SMB_MALLOC_P(struct packet_struct)) == NULL) {
******************************************************************/
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);
******************************************************************/
static void free_dgram_packet(struct dgram_packet *nmb)
-{
+{
/* We have nothing to do for a dgram packet. */
}
******************************************************************/
void free_packet(struct packet_struct *packet)
-{
- if (packet->locked)
+{
+ if (packet->locked)
return;
if (packet->packet_type == NMB_PACKET)
free_nmb_packet(&packet->packet.nmb);
******************************************************************/
struct packet_struct *parse_packet(char *buf,int length,
- enum packet_type packet_type)
+ enum packet_type packet_type,
+ struct in_addr ip,
+ int port)
{
struct packet_struct *p;
BOOL ok=False;
p->next = NULL;
p->prev = NULL;
- p->ip = lastip;
- p->port = lastport;
+ p->ip = ip;
+ p->port = port;
p->locked = False;
p->timestamp = time(NULL);
p->packet_type = 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;
struct packet_struct *read_packet(int fd,enum packet_type packet_type)
{
struct packet_struct *packet;
+ struct sockaddr_storage sa;
+ struct sockaddr_in *si = (struct sockaddr_in *)&sa;
char buf[MAX_DGRAM_SIZE];
int length;
-
- length = read_udp_socket(fd,buf,sizeof(buf));
- if (length < MIN_DGRAM_SIZE)
- return(NULL);
-
- packet = parse_packet(buf, length, packet_type);
+
+ length = read_udp_v4_socket(fd,buf,sizeof(buf),&sa);
+ if (length < MIN_DGRAM_SIZE || sa.ss_family != AF_INET) {
+ return NULL;
+ }
+
+ packet = parse_packet(buf,
+ length,
+ packet_type,
+ si->sin_addr,
+ si->sin_port);
if (!packet)
return NULL;
packet->fd = fd;
-
+
num_good_receives++;
-
+
DEBUG(5,("Received a packet of len %d from (%s) port %d\n",
length, inet_ntoa(packet->ip), packet->port ) );
-
+
return(packet);
}
-
+
/*******************************************************************
Send a udp packet on a already open socket.
******************************************************************/
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, 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);
+ ret = (sendto(fd,buf,len,0,(struct sockaddr *)&sock_out,
+ sizeof(sock_out)) >= 0);
if (ret || errno != ECONNREFUSED)
break;
}
/*******************************************************************
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 -)------ ]
-
+ If buf == NULL this is a length calculation.
******************************************************************/
-static int build_dgram(char *buf,struct packet_struct *p)
+static int build_dgram(char *buf, size_t len, struct packet_struct *p)
{
struct dgram_packet *dgram = &p->packet.dgram;
unsigned char *ubuf = (unsigned char *)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);
+ if (buf) {
+ 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) {
+ 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);
+ if (buf) {
+ memcpy(ubuf+offset,dgram->data,dgram->datasize);
+ }
offset += dgram->datasize;
/* automatically set the dgm_length
* include the fourteen-byte header. crh
*/
dgram->header.dgm_length = (offset - 14);
- RSSVAL(ubuf,10,dgram->header.dgm_length);
+ if (buf) {
+ RSSVAL(ubuf,10,dgram->header.dgm_length);
+ }
- return(offset);
+ return offset;
}
/*******************************************************************
/*******************************************************************
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)
+ If buf == NULL this is a length calculation.
******************************************************************/
-static int build_nmb(char *buf,struct packet_struct *p)
+static int build_nmb(char *buf, size_t len, struct packet_struct *p)
{
struct nmb_packet *nmb = &p->packet.nmb;
unsigned char *ubuf = (unsigned char *)buf;
int offset=0;
+ if (len && len < 12) {
+ return 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);
-
+ if (buf) {
+ 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);
+ if (len) {
+ /* Length check. */
+ int extra = put_nmb_name(NULL,offset,
+ &nmb->question.question_name);
+ if (offset + extra > len) {
+ return 0;
+ }
+ }
+ offset += put_nmb_name((char *)ubuf,offset,
+ &nmb->question.question_name);
+ if (buf) {
+ RSSVAL(ubuf,offset,nmb->question.question_type);
+ RSSVAL(ubuf,offset+2,nmb->question.question_class);
+ }
offset += 4;
}
- if (nmb->header.ancount)
+ if (nmb->header.ancount) {
+ if (len) {
+ /* Length check. */
+ int extra = put_res_rec(NULL,offset,nmb->answers,
+ nmb->header.ancount);
+ if (offset + extra > len) {
+ return 0;
+ }
+ }
offset += put_res_rec((char *)ubuf,offset,nmb->answers,
nmb->header.ancount);
+ }
- if (nmb->header.nscount)
+ if (nmb->header.nscount) {
+ if (len) {
+ /* Length check. */
+ int extra = put_res_rec(NULL,offset,nmb->nsrecs,
+ nmb->header.nscount);
+ if (offset + extra > len) {
+ return 0;
+ }
+ }
offset += put_res_rec((char *)ubuf,offset,nmb->nsrecs,
nmb->header.nscount);
+ }
/*
* The spec says we must put compressed name pointers
*/
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);
-
+ ((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)) {
+
+ if (len) {
+ /* Length check. */
+ int extra = put_compressed_name_ptr(NULL,offset,
+ nmb->additional,12);
+ if (offset + extra > len) {
+ return 0;
+ }
+ }
+ offset += put_compressed_name_ptr(ubuf,offset,
+ nmb->additional,12);
} else if (nmb->header.arcount) {
+ if (len) {
+ /* Length check. */
+ int extra = put_res_rec(NULL,offset,nmb->additional,
+ nmb->header.arcount);
+ if (offset + extra > len) {
+ return 0;
+ }
+ }
offset += put_res_rec((char *)ubuf,offset,nmb->additional,
- nmb->header.arcount);
+ nmb->header.arcount);
}
- return(offset);
+ return offset;
}
/*******************************************************************
Linearise a packet.
******************************************************************/
-int build_packet(char *buf, struct packet_struct *p)
+int build_packet(char *buf, size_t buflen, struct packet_struct *p)
{
int len = 0;
switch (p->packet_type) {
case NMB_PACKET:
- len = build_nmb(buf,p);
+ len = build_nmb(buf,buflen,p);
break;
case DGRAM_PACKET:
- len = build_dgram(buf,p);
+ len = build_dgram(buf,buflen,p);
break;
}
memset(buf,'\0',sizeof(buf));
- len = build_packet(buf, p);
+ len = build_packet(buf, sizeof(buf), p);
if (!len)
return(False);
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));
+ 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))
+ if (FD_ISSET(fd,&fds))
return(read_packet(fd,type));
-
+
return(NULL);
}
The timeout is in milliseconds.
***************************************************************************/
-struct packet_struct *receive_dgram_packet(int fd, int t, const char *mailslot_name)
+struct packet_struct *receive_dgram_packet(int fd, int t,
+ const char *mailslot_name)
{
struct packet_struct *p;
if ((p1[i] & (1<<(7-j))) != (p2[i] & (1<<(7-j))))
break;
ret++;
- }
-
+ }
+
return ret;
}
static int name_query_comp(unsigned char *p1, unsigned char *p2)
{
- return matching_quad_bits(p2+2, sort_ip) - matching_quad_bits(p1+2, sort_ip);
+ return matching_quad_bits(p2+2, sort_ip) -
+ matching_quad_bits(p1+2, sort_ip);
}
/****************************************************************************
int i;
StrnCpy(netbios_name, dns_name, MAX_NETBIOSNAME_LEN-1);
netbios_name[15] = 0;
-
+
/* 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
} else {
return(buf+ofs);
}
-}
+}
/****************************************************************************
Extract a netbios name from a buf (into a unix string) return name type.
return(0);
return(name_interpret(p,name));
}
-
+
/****************************************************************************
Return the total storage length of a mangled name.
****************************************************************************/
git.samba.org / tprouty / samba.git / commitdiff