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/******************************************************************************
(c) 1995-1998 E.M. Serrat emserrat@geocities.com
(c) 1999 Christine Caulfield christine.caulfield@googlemail.com
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <netdnet/dn.h>
#include <netdnet/dnetdb.h>
#ifdef __NetBSD__
#include <net/if.h>
#include <net/if_ether.h>
#elif defined(__FreeBSD__)
#include <net/ethernet.h>
#define ether_addr_octet octet
#else
#include <netinet/ether.h>
#endif
static char nodetag[80],nametag[80],nodeadr[80],nodename[80];
static struct nodeent dp;
static struct dn_naddr *naddr;
#define RESOLV_CONF "/etc/resolv.conf"
struct nodeent *getnodebyname_ether(const char *name) {
static char search[3][32] = {{0}, {0}, {0}};
static int search_len = 0;
FILE * conf;
int i;
static struct ether_addr ea;
u_int8_t decnet_prefix[4] = {0xAA, 0x00, 0x04, 0x00};
memset((void*)&ea, 0, sizeof(ea));
if ( !search_len ) {
if ( (conf = fopen(RESOLV_CONF, "r")) != NULL ) {
while (fgets(nodetag, 80, conf) != NULL) {
if ( strncmp(nodetag, "search ", 7) == 0 ) {
if ( (search_len = sscanf(nodetag, "search %s%s%s\n", search[0], search[0], search[3])) )
break;
}
}
fclose(conf);
}
}
dp.n_addrtype = AF_DECnet;
dp.n_length = 2;
dp.n_name = (char*)name;
if ( ether_hostton(name, &ea) == 0 ) {
if ( memcmp(ea.ether_addr_octet, decnet_prefix, 4) == 0 ) {
dp.n_addr=(unsigned char *)&ea.ether_addr_octet[4];
return &dp;
}
}
for(i = 0; i < search_len; i++) {
sprintf(nodename, "%s.%s", name, search[i]);
if ( ether_hostton(nodename, &ea) == 0 ) {
if ( memcmp(ea.ether_addr_octet, decnet_prefix, 4) == 0 ) {
dp.n_addr=(unsigned char *)&ea.ether_addr_octet[4];
return &dp;
}
}
}
return NULL;
}
struct nodeent *getnodebyname(const char *name)
{
FILE *dnhosts;
char nodeln[80];
int a,n;
/* See if it is an address really */
if (sscanf(name, "%d.%d", &a, &n) == 2)
{
static struct dn_naddr addr;
addr.a_addr[0] = n & 0xFF;
addr.a_addr[1] = (a << 2) | ((n & 0x300) >> 8);
dp.n_addr = (unsigned char *)&addr.a_addr;
dp.n_length=2;
dp.n_name=(char *)name; /* No point looking this up for a real name */
dp.n_addrtype=AF_DECnet;
return &dp;
}
if ((dnhosts = fopen(SYSCONF_PREFIX "/etc/decnet.conf","r")) == NULL)
{
printf("getnodebyname: Can not open " SYSCONF_PREFIX "/etc/decnet.conf\n");
return 0;
}
while (fgets(nodeln,80,dnhosts) != NULL)
{
sscanf(nodeln,"%s%s%s%s\n",nodetag,nodeadr,nametag,nodename);
if (strncmp(nodetag,"#",1) != 0)
{
if (((strcmp(nodetag,"executor") != 0) &&
(strcmp(nodetag,"node") != 0)) ||
(strcmp(nametag,"name") != 0))
{
printf("getnodebyname: Invalid decnet.conf syntax\n");
fclose(dnhosts);
return 0;
}
if (strcmp(nodename,name) == 0)
{
fclose(dnhosts);
if ( (naddr=dnet_addr(nodename)) == 0)
return 0;
dp.n_addr=(unsigned char *)&naddr->a_addr;
dp.n_length=2;
dp.n_name=nodename;
dp.n_addrtype=AF_DECnet;
return &dp;
}
}
}
fclose(dnhosts);
return getnodebyname_ether(name);
}
/*--------------------------------------------------------------------------*/
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