1: /*
   2:  * This file implements functions for dealing with names in the XNS
   3:  * environment.
   4:  */
   5: 
   6: /*
   7:  $Log:	names.c,v $
   8:  * Revision 2.0  85/11/21  07:22:14  jqj
   9:  * 4.3BSD standard release
  10:  *
  11:  * Revision 1.2  85/10/21  12:58:41  root
  12:  * Gould version:  eliminate various uses of ns_netof(), which doesn't
  13:  * work on Gould.
  14:  *
  15:  * Revision 1.1  85/10/17  10:13:45  bill
  16:  * Initial revision
  17:  *
  18:  * Revision 1.3  85/03/11  16:37:13  jqj
  19:  * Public alpha-test version, released 11 March 1985
  20:  *
  21:  * Revision 1.2  85/01/27  07:37:32  jqj
  22:  * finished but undebugged version
  23:  *
  24:  */
  25: 
  26: #ifndef lint
  27: static char rcsid[] = "$Header: names.c,v 2.0 85/11/21 07:22:14 jqj Exp $";
  28: #endif
  29: 
  30: #include <stdio.h>
  31: #include <sys/types.h>      /* for ns.h and socket.h */
  32: #include <sys/socket.h>     /* for ns.h */
  33: #include <netns/ns.h>       /* for XNS addresses */
  34: #include <netdb.h>
  35: 
  36: 
  37: 
  38: /*ARGSUSED*/
  39: struct ns_addr *
  40: ClearinghouseLookup(name,field)
  41:     char *name, *field;
  42: {
  43:     /* not yet implemented */
  44:     return(NULL);
  45: }
  46: 
  47: struct ns_addr *
  48: getXNSaddr(name)
  49:     char *name;
  50: {
  51:     static struct ns_addr addr;
  52:     long net,net1;
  53:     int i;
  54:     int hb[6];
  55:     u_short socket;
  56:     char *netname, *hostname, *socketname;
  57:     extern char *index();
  58: 
  59:     netname = name;
  60:     if (NULL == (hostname = index(name,'#'))) {
  61:         /* no # means just a host name */
  62:         netname = "0"; hostname = name; socketname = "0";
  63:     }
  64:     else if (NULL == (socketname = index(++hostname,'#')))
  65:         /* one # means net#host */
  66:         socketname = "0";
  67:     else
  68:         /* two # means net#host#socket */
  69:         socketname += 1;
  70: 
  71:     *(u_long *)&addr.x_net = 0;
  72:     for (i = 0; i < 6; i++)
  73:         addr.x_host.c_host[i] = (char) 0;
  74:     addr.x_port = 0;
  75:     /*
  76: 	 * first try 2-273#2-852-151-014#socket
  77: 	 */
  78:     if (1 < (i = sscanf(hostname,"%d-%d-%d-%d-%d#",
  79:             &hb[0], &hb[1], &hb[2], &hb[3], &hb[4]))) {
  80:         cvtbase(1000,256,hb,i,addr.x_host.c_host,6);
  81:         i = sscanf(netname,"%ld-%ld#", &net, &net1);
  82:         if (i > 1)
  83:             net = net*1000+net1;
  84:         i = sscanf(socketname,"%hd", &socket);
  85:         *(u_long *)&addr.x_net = htonl(net);
  86:         addr.x_port = htons(socket);
  87:         return(&addr);
  88:     }
  89:     /*
  90: 	 * try form 8E1#0.0.AA.0.5E.E6#socket
  91: 	 */
  92:     else if (1 < (i = sscanf(hostname,"%x.%x.%x.%x.%x.%x",
  93:             &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
  94:         cvtbase(256,256,hb,i,addr.x_host.c_host,6);
  95:         i = sscanf(netname,"%lx", &net);
  96:         i = sscanf(socketname,"%hx", &socket);
  97:         *(u_long *)&addr.x_net = htonl(net);
  98:         addr.x_port = htons(socket);
  99:         return(&addr);
 100:     }
 101:     /* code for alternate forms here */
 102:     return(NULL);   /* no match */
 103: }
 104: 
 105: static
 106: cvtbase(oldbase,newbase,input,inlen,result,reslen)
 107:     int oldbase, newbase;
 108:     int input[];
 109:     int inlen;
 110:     unsigned char result[];
 111:     int reslen;
 112: {
 113:     int d, e;
 114:     long sum;
 115: 
 116:     e = 1;
 117:     while (e > 0 && reslen > 0) {
 118:         d = 0; e = 0; sum = 0;
 119:         /* long division: input=input/newbase */
 120:         while (d < inlen) {
 121:             sum = sum*oldbase + (long) input[d];
 122:             e += (sum > 0);
 123:             input[d++] = sum / newbase;
 124:             sum %= newbase;
 125:         }
 126:         result[--reslen] = sum; /* accumulate remainder */
 127:     }
 128:     for (d=0; d < reslen; d++)
 129:         result[d] = 0;
 130: }
 131: 
 132: 
 133: /*ARGSUSED*/
 134: struct hostent *
 135: getXNShostbyname (name)
 136:     char *name;
 137: {
 138: /* can't use gethostent() since only internet addresses are understood */
 139:     return(NULL);
 140: }
 141: 
 142: 
 143: 
 144: struct ns_addr *
 145: CourierName( name )
 146:     char *name;
 147: {
 148:     struct hostent *haddr;
 149:     struct ns_addr *paddr;
 150: 
 151:                     /* first, try an explicit address */
 152:                     /* like 3#1.2.3.4.5.6#5 */
 153:     if ((paddr = getXNSaddr(name)) != NULL)
 154:         return(paddr);
 155:                     /* second, try a local cache lookup */
 156:     if ((haddr = getXNShostbyname(name)) != NULL) {
 157:         return((struct ns_addr*) haddr->h_addr);
 158:     }
 159:                     /* finally, try a nonlocal lookup */
 160:     return( ClearinghouseLookup(name,(char*)NULL) );
 161: }

Defined functions

ClearinghouseLookup defined in line 39; used 1 times
CourierName defined in line 144; never used
cvtbase defined in line 105; used 2 times
getXNSaddr defined in line 47; used 1 times
getXNShostbyname defined in line 134; used 1 times

Defined variables

rcsid defined in line 27; never used
Last modified: 1986-03-13
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