};
/****************************************************************************
- * Lookup a nmb opcode name.
- ****************************************************************************/
+ 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>";
+ 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
- ****************************************************************************/
+ 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++)
- {
- uchar x = res->rdata[i+j];
- if (x < 32 || x > 127) x = '.';
+ 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+= MAX_NETBIOSNAME_LEN) {
+ DEBUGADD(4, (" %s %3x char ", hdr, i));
+
+ for (j = 0; j < MAX_NETBIOSNAME_LEN; j++) {
+ unsigned char x = res->rdata[i+j];
+ if (x < 32 || x > 127)
+ x = '.';
- if (i+j >= res->rdlength) break;
- DEBUGADD(4, ("%c", x));
- }
+ if (i+j >= res->rdlength)
+ break;
+ DEBUGADD(4, ("%c", x));
+ }
- DEBUGADD(4, (" hex "));
+ DEBUGADD(4, (" hex "));
- for (j = 0; j < 16; j++)
- {
- if (i+j >= res->rdlength) break;
- DEBUGADD(4, ("%02X", (uchar)res->rdata[i+j]));
- }
+ for (j = 0; j < MAX_NETBIOSNAME_LEN; j++) {
+ if (i+j >= res->rdlength)
+ break;
+ DEBUGADD(4, ("%02X", (unsigned char)res->rdata[i+j]));
+ }
- DEBUGADD(4, ("\n"));
- }
+ DEBUGADD(4, ("\n"));
+ }
}
/****************************************************************************
- process a nmb packet
- ****************************************************************************/
+ Process a nmb packet.
+****************************************************************************/
+
void debug_nmb_packet(struct packet_struct *p)
{
- 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",
- 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",
- 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",
- 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");
- }
+ 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",
+ 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",
+ 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",
+ 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(uchar *ubuf,int *offset,int length,
+ Handle "compressed" name pointers.
+******************************************************************/
+
+static BOOL handle_name_ptrs(unsigned char *ubuf,int *offset,int length,
BOOL *got_pointer,int *ret)
{
- int loop_count=0;
+ 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);
+ 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
- ******************************************************************/
+ 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;
- uchar *ubuf = (uchar *)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);
+ int m,n=0;
+ unsigned char *ubuf = (unsigned char *)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) {
- uchar 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 = ((uchar)name->name[15]) & 0xff;
+ 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) {
+ unsigned char 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==MAX_NETBIOSNAME_LEN) {
+ /* 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;
- }
-
- /* 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);
+ /* 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 netbios name, padding(s) and a name type into a 16 character buffer.
+ name is already in DOS charset.
+ [15 bytes name + padding][1 byte name type].
+****************************************************************************/
+
+static void put_name(char *dest, const char *name, int pad, unsigned int name_type)
+{
+ size_t len = strlen(name);
+
+ 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);
+ }
+ dest[MAX_NETBIOSNAME_LEN - 1] = name_type;
+}
/*******************************************************************
- put a compressed nmb name into a buffer. return the length of the
- compressed name
+ 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.
+******************************************************************/
- 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;
- safe_strcpy(&buf[offset+1],name->scope,sizeof(name->scope));
+ int ret,m;
+ fstring buf1;
+ char *p;
+
+ if (strcmp(name->name,"*") == 0) {
+ /* special case for wildcard name */
+ put_name(buf1, "*", '\0', name->name_type);
+ } else {
+ put_name(buf1, name->name, ' ', name->name_type);
+ }
+
+ 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);
+ }
+ offset += 33;
+
+ 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);
- p = &buf[offset+1];
- }
- buf[offset] = strlen(&buf[offset+1]);
- }
-
- return(ret);
+ 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);
}
/*******************************************************************
}
/*******************************************************************
- allocate and parse some resource records
- ******************************************************************/
+ 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 = (struct res_rec *)malloc(sizeof(**recs)*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);
+ int i;
+
+ *recs = (struct res_rec *)malloc(sizeof(**recs)*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
- ******************************************************************/
+ 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);
+ 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(uchar *buf,int offset,struct res_rec *rec,int ptr_offset)
+ Put a compressed name pointer record into a packet.
+******************************************************************/
+
+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);
- 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;
+ 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);
+ return(ret);
}
/*******************************************************************
- parse a dgram packet. Return False if the packet can't be parsed
- or is invalid for some reason, True otherwise
+ 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.
+******************************************************************/
- 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);
- }
+ 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);
+ if (offset >= length || (length-offset > sizeof(dgram->data)))
+ return(False);
- dgram->datasize = length-offset;
- memcpy(dgram->data,inbuf+offset,dgram->datasize);
+ dgram->datasize = length-offset;
+ memcpy(dgram->data,inbuf+offset,dgram->datasize);
- return(True);
+ return(True);
}
-
/*******************************************************************
- parse a nmb packet. Return False if the packet can't be parsed
- or is invalid for some reason, True otherwise
- ******************************************************************/
+ 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);
+ 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.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);
+ if (nmb->header.arcount && !parse_alloc_res_rec(inbuf,&offset,length,&nmb->additional,
+ nmb->header.arcount))
+ return(False);
- return(True);
+ return(True);
}
/*******************************************************************
- 'Copy constructor' for an nmb packet
- ******************************************************************/
+ '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 = (struct packet_struct *)malloc(sizeof(*packet))) == 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 = (struct res_rec *)
- malloc(nmb->header.ancount * sizeof(struct res_rec))) == 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 = (struct res_rec *)
- malloc(nmb->header.nscount * sizeof(struct res_rec))) == 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 = (struct res_rec *)
- malloc(nmb->header.arcount * sizeof(struct res_rec))) == 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;
+ struct nmb_packet *nmb;
+ struct nmb_packet *copy_nmb;
+ struct packet_struct *pkt_copy;
+
+ if(( pkt_copy = (struct packet_struct *)malloc(sizeof(*packet))) == 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 = (struct res_rec *)
+ malloc(nmb->header.ancount * sizeof(struct res_rec))) == 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 = (struct res_rec *)
+ malloc(nmb->header.nscount * sizeof(struct res_rec))) == 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 = (struct res_rec *)
+ malloc(nmb->header.arcount * sizeof(struct res_rec))) == 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
- ******************************************************************/
+ 'Copy constructor' for a dgram packet.
+******************************************************************/
+
static struct packet_struct *copy_dgram_packet(struct packet_struct *packet)
{
- struct packet_struct *pkt_copy;
+ struct packet_struct *pkt_copy;
- if(( pkt_copy = (struct packet_struct *)malloc(sizeof(*packet))) == NULL)
- {
- DEBUG(0,("copy_dgram_packet: malloc fail.\n"));
- return NULL;
- }
+ if(( pkt_copy = (struct packet_struct *)malloc(sizeof(*packet))) == NULL) {
+ DEBUG(0,("copy_dgram_packet: malloc fail.\n"));
+ return NULL;
+ }
- /* Structure copy of entire thing. */
+ /* Structure copy of entire thing. */
- *pkt_copy = *packet;
+ *pkt_copy = *packet;
- /* Ensure this copy is not locked. */
- pkt_copy->locked = False;
+ /* 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;
+ /* There are no additional pointers in a dgram packet,
+ we are finished. */
+ return pkt_copy;
}
/*******************************************************************
- 'Copy constructor' for a generic packet
- ******************************************************************/
+ '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;
+ 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
- ******************************************************************/
+ 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);
+ SAFE_FREE(nmb->answers);
+ SAFE_FREE(nmb->nsrecs);
+ SAFE_FREE(nmb->additional);
}
/*******************************************************************
- free up any resources associated with a dgram packet
- ******************************************************************/
+ 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. */
+ /* We have nothing to do for a dgram packet. */
}
/*******************************************************************
- free up any resources associated with a 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);
+ 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
- ******************************************************************/
+ Parse a packet buffer into a packet structure.
+******************************************************************/
+
struct packet_struct *parse_packet(char *buf,int length,
enum packet_type packet_type)
{
BOOL ok=False;
p = (struct packet_struct *)malloc(sizeof(*p));
- if (!p) return(NULL);
+ if (!p)
+ return(NULL);
p->next = NULL;
p->prev = NULL;
}
/*******************************************************************
- 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
- ******************************************************************/
+ 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;
int length;
length = read_udp_socket(fd,buf,sizeof(buf));
- if (length < MIN_DGRAM_SIZE) return(NULL);
+ if (length < MIN_DGRAM_SIZE)
+ return(NULL);
packet = parse_packet(buf, length, packet_type);
- if (!packet) return NULL;
+ if (!packet)
+ return NULL;
packet->fd = fd;
return(packet);
}
-
/*******************************************************************
- send a udp packet on a already open socket
- ******************************************************************/
+ Send a udp packet on a already open socket.
+******************************************************************/
+
static BOOL send_udp(int fd,char *buf,int len,struct in_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;
+ 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, inet_ntoa(ip), port ) );
+ 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.
- */
+ /*
+ * 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;
- }
+ 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",
- inet_ntoa(ip),port,strerror(errno)));
+ if (!ret)
+ DEBUG(0,("Packet send failed to %s(%d) ERRNO=%s\n",
+ inet_ntoa(ip),port,strerror(errno)));
- if (ret)
- num_good_sends++;
+ if (ret)
+ num_good_sends++;
- return(ret);
+ return(ret);
}
/*******************************************************************
- build a dgram packet ready for sending
+ 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.
+ 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 -)------ ]
+ [...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;
- uchar *ubuf = (uchar *)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);
+ 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);
+
+ 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);
}
/*******************************************************************
/*******************************************************************
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));
+ return ((n1->name_type == n2->name_type) &&
+ strequal(n1->name ,n2->name ) &&
+ strequal(n1->scope,n2->scope));
}
/*******************************************************************
- build a nmb packet ready for sending
+ 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)
+******************************************************************/
- 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;
- uchar *ubuf = (uchar *)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);
+ struct nmb_packet *nmb = &p->packet.nmb;
+ unsigned char *ubuf = (unsigned char *)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);
-}
+ 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
- ******************************************************************/
+ Linearise a packet.
+******************************************************************/
+
int build_packet(char *buf, struct packet_struct *p)
{
int len = 0;
}
/*******************************************************************
- send a packet_struct
- ******************************************************************/
+ Send a packet_struct.
+******************************************************************/
+
BOOL send_packet(struct packet_struct *p)
{
- char buf[1024];
- int len=0;
+ char buf[1024];
+ int len=0;
- memset(buf,'\0',sizeof(buf));
+ memset(buf,'\0',sizeof(buf));
- len = build_packet(buf, p);
+ len = build_packet(buf, p);
- if (!len) return(False);
+ if (!len)
+ return(False);
- return(send_udp(p->fd,buf,len,p->ip,p->port));
+ 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
- ***************************************************************************/
+ 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;
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
- ***************************************************************************/
+ 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) {
+ p->packet.nmb.header.name_trn_id == trn_id) {
return p;
}
- if (p) free_packet(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
- ***************************************************************************/
+ 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;
if (p && match_mailslot_name(p, mailslot_name)) {
return p;
}
- if (p) free_packet(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
+ 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;
return False;
}
-
/****************************************************************************
-return the number of bits that match between two 4 character buffers
- ***************************************************************************/
-int matching_quad_bits(uchar *p1, uchar *p2)
+ Return the number of bits that match between two 4 character buffers
+***************************************************************************/
+
+int matching_quad_bits(unsigned char *p1, unsigned char *p2)
{
int i, j, ret = 0;
for (i=0; i<4; i++) {
- if (p1[i] != p2[i]) break;
+ if (p1[i] != p2[i])
+ break;
ret += 8;
}
- if (i==4) return ret;
+ if (i==4)
+ return ret;
for (j=0; j<8; j++) {
- if ((p1[i] & (1<<(7-j))) != (p2[i] & (1<<(7-j)))) break;
+ if ((p1[i] & (1<<(7-j))) != (p2[i] & (1<<(7-j))))
+ break;
ret++;
}
return ret;
}
-
-static uchar sort_ip[4];
+static unsigned char sort_ip[4];
/****************************************************************************
-compare two query reply records
- ***************************************************************************/
-static int name_query_comp(uchar *p1, uchar *p2)
+ Compare two query reply records.
+***************************************************************************/
+
+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);
}
/****************************************************************************
-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
- ***************************************************************************/
+ 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 in_addr ip)
{
- if (n <= 1) return;
+ 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
+ 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
+ The netbios name (NOT necessarily null-terminated) is truncated to 15
characters.
******************************************************************/
-char *dns_to_netbios_name(char *dns_name)
+
+char *dns_to_netbios_name(const char *dns_name)
{
- static char netbios_name[16];
+ static nstring netbios_name;
int i;
- StrnCpy(netbios_name, dns_name, 15);
+ StrnCpy(netbios_name, dns_name, MAX_NETBIOSNAME_LEN-1);
netbios_name[15] = 0;
#ifdef TRUNCATE_NETBIOS_NAME
netbios name up to and including the '.' this even applies, by
mistake, to workgroup (domain) names, which is _really_ daft.
*/
- for (i = 0; i >= 15; i--)
- {
- if (netbios_name[i] == '.')
- {
+ for (i = 0; i >= 15; i--) {
+ if (netbios_name[i] == '.') {
netbios_name[i] = 0;
break;
}
return netbios_name;
}
-
/****************************************************************************
-interpret the weird netbios "name" into a unix fstring. Return the name type
+ Interpret the weird netbios "name" into a unix fstring. Return the name type.
****************************************************************************/
+
static int name_interpret(char *in, fstring name)
{
- int ret;
- int len = (*in++) / 2;
- fstring out_string;
- char *out = out_string;
-
- *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++;
- }
- ret = out[-1];
- out[-1] = 0;
+ int ret;
+ int len = (*in++) / 2;
+ fstring out_string;
+ char *out = out_string;
+
+ *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++;
+ }
+ ret = out[-1];
+ out[-1] = 0;
#ifdef NETBIOS_SCOPE
- /* Handle any scope names */
- while(*in)
- {
- *out++ = '.'; /* Scope names are separated by periods */
- len = *(uchar *)in++;
- StrnCpy(out, in, len);
- out += len;
- *out=0;
- in += len;
- }
+ /* Handle any scope names */
+ while(*in) {
+ *out++ = '.'; /* Scope names are separated by periods */
+ len = *(unsigned char *)in++;
+ StrnCpy(out, in, len);
+ out += len;
+ *out=0;
+ in += len;
+ }
#endif
- pull_ascii(name, out_string, sizeof(fstring), sizeof(out_string), STR_TERMINATE);
+ pull_ascii_fstring(name, out_string);
- return(ret);
+ return(ret);
}
/****************************************************************************
-mangle a name into netbios format
-
- Note: <Out> must be (33 + strlen(scope) + 2) bytes long, at minimum.
+ Mangle a name into netbios format.
+ Note: <Out> must be (33 + strlen(scope) + 2) bytes long, at minimum.
****************************************************************************/
+
int name_mangle( char *In, char *Out, char name_type )
- {
- int i;
- int c;
- int len;
- char buf[20];
- char *p = Out;
-
- /* Safely copy the input string, In, into buf[]. */
- (void)memset( buf, 0, 20 );
- if (strcmp(In,"*") == 0)
- buf[0] = '*';
- else
- (void)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) & 0x000F ) + 'A';
- p[(i*2)+1] = (c & 0x000F) + 'A';
- }
- p += 32;
- p[0] = '\0';
-
- /* Add the scope string. */
- for( i = 0, len = 0; *(global_scope()) != '\0'; i++, len++ )
- {
- switch( (global_scope())[i] )
- {
- case '\0':
- p[0] = len;
- if( len > 0 )
- p[len+1] = 0;
- return( name_len(Out) );
- case '.':
- p[0] = len;
- p += (len + 1);
- len = -1;
- break;
- default:
- p[len+1] = (global_scope())[i];
- break;
- }
- }
-
- return( name_len(Out) );
- } /* name_mangle */
+{
+ int i;
+ int c;
+ int len;
+ char buf[20];
+ char *p = Out;
+
+ /* 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 < MAX_NETBIOSNAME_LEN; i++ ) {
+ c = toupper( buf[i] );
+ p[i*2] = ( (c >> 4) & 0x000F ) + 'A';
+ p[(i*2)+1] = (c & 0x000F) + 'A';
+ }
+ p += 32;
+ p[0] = '\0';
+
+ /* Add the scope string. */
+ for( i = 0, len = 0; *(global_scope()) != '\0'; i++, len++ ) {
+ switch( (global_scope())[i] ) {
+ case '\0':
+ p[0] = len;
+ if( len > 0 )
+ p[len+1] = 0;
+ return( name_len(Out) );
+ case '.':
+ p[0] = len;
+ p += (len + 1);
+ len = -1;
+ break;
+ default:
+ p[len+1] = (global_scope())[i];
+ break;
+ }
+ }
+
+ return( name_len(Out) );
+}
/****************************************************************************
-find a pointer to a netbios name
+ Find a pointer to a netbios name.
****************************************************************************/
+
static char *name_ptr(char *buf,int ofs)
{
- uchar c = *(uchar *)(buf+ofs);
-
- if ((c & 0xC0) == 0xC0)
- {
- uint16 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);
+ unsigned char c = *(unsigned char *)(buf+ofs);
+
+ if ((c & 0xC0) == 0xC0) {
+ uint16 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 (into a unix string) return name type
+ Extract a netbios name from a buf (into a unix string) return name type.
****************************************************************************/
+
int name_extract(char *buf,int ofs, fstring 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));
+ char *p = name_ptr(buf,ofs);
+ int d = PTR_DIFF(p,buf+ofs);
+
+ name[0] = '\0';
+ if (d < -50 || d > 50)
+ return(0);
+ return(name_interpret(p,name));
}
/****************************************************************************
-return the total storage length of a mangled name
+ Return the total storage length of a mangled name.
****************************************************************************/
+
int name_len(char *s1)
{
/* NOTE: this argument _must_ be unsigned */
- uchar *s = (uchar *)s1;
+ unsigned char *s = (unsigned char *)s1;
int len;
/* If the two high bits of the byte are set, return 2. */
}
return(len);
-} /* name_len */
+}
git.samba.org / gd / samba-autobuild / .git / commitdiff