sys/src/ape/lib/net/netmkaddr.c

   1 #include <stdlib.h>
   2 #include <sys/types.h>
   3 #include <string.h>
   4 #include <fcntl.h>
   5 #include <stdio.h>
   6 #include <unistd.h>
   7 #include <libnet.h>
   8
   9 /*
  10  *  make an address, add the defaults
  11  */
  12 char *
  13 netmkaddr(char *linear, char *defnet, char *defsrv)
  14 {
  15         static char addr[256];
  16         char *cp;
  17
  18         /*
  19          *  dump network name
  20          */
  21         cp = strchr(linear, '!');
  22         if(cp == 0){
  23                 if(defnet==0){
  24                         if(defsrv)
  25                                 snprintf(addr, sizeof(addr), "net!%s!%s",
  26                                         linear, defsrv);
  27                         else
  28                                 snprintf(addr, sizeof(addr), "net!%s", linear);
  29                 }
  30                 else {
  31                         if(defsrv)
  32                                 snprintf(addr, sizeof(addr), "%s!%s!%s", defnet,
  33                                         linear, defsrv);
  34                         else
  35                                 snprintf(addr, sizeof(addr), "%s!%s", defnet,
  36                                         linear);
  37                 }
  38                 return addr;
  39         }
  40
  41         /*
  42          *  if there is already a service, use it
  43          */
  44         cp = strchr(cp+1, '!');
  45         if(cp)
  46                 return linear;
  47
  48         /*
  49          *  add default service
  50          */
  51         if(defsrv == 0)
  52                 return linear;
  53         snprintf(addr, sizeof(addr), "%s!%s", linear, defsrv);
  54
  55         return addr;
  56 }