nsz Git - musl/blob - src/network/lookup_ipliteral.c

   1 #include <sys/socket.h>
   2 #include <netinet/in.h>
   3 #include <netdb.h>
   4 #include <net/if.h>
   5 #include <arpa/inet.h>
   6 #include <limits.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <ctype.h>
  10 #include "lookup.h"
  11
  12 int __inet_aton(const char *, struct in_addr *);
  13
  14 int __lookup_ipliteral(struct address buf[static 1], const char *name, int family)
  15 {
  16         struct in_addr a4;
  17         struct in6_addr a6;
  18         if (family != AF_INET6 && __inet_aton(name, &a4)>0) {
  19                 memcpy(&buf[0].addr, &a4, sizeof a4);
  20                 buf[0].family = AF_INET;
  21                 buf[0].scopeid = 0;
  22                 return 1;
  23         }
  24         if (family != AF_INET) {
  25                 char tmp[64];
  26                 char *p = strchr(name, '%'), *z;
  27                 unsigned long long scopeid;
  28                 if (p && p-name < 64) {
  29                         memcpy(tmp, name, p-name);
  30                         tmp[p-name] = 0;
  31                         name = tmp;
  32                 }
  33                 if (inet_pton(AF_INET6, name, &a6)<=0) return 0;
  34                 memcpy(&buf[0].addr, &a6, sizeof a6);
  35                 buf[0].family = AF_INET6;
  36                 if (p) {
  37                         if (isdigit(*++p)) scopeid = strtoull(p, &z, 10);
  38                         else z = p-1;
  39                         if (*z) {
  40                                 if (!IN6_IS_ADDR_LINKLOCAL(&a6) &&
  41                                     !IN6_IS_ADDR_MC_LINKLOCAL(&a6))
  42                                         return EAI_NONAME;
  43                                 scopeid = if_nametoindex(p);
  44                                 if (!scopeid) return EAI_NONAME;
  45                         }
  46                         if (scopeid > UINT_MAX) return EAI_NONAME;
  47                         buf[0].scopeid = scopeid;
  48                 }
  49                 return 1;
  50         }
  51         return 0;
  52 }