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