skalibs

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socket_remote46.c (893B)

      1 /* ISC license. */
      2 
      3 #include <skalibs/nonposix.h>
      4 
      5 #include <errno.h>
      6 #include <sys/socket.h>
      7 #include <netinet/in.h>
      8 #include <string.h>
      9 
     10 #include <skalibs/uint16.h>
     11 #include <skalibs/ip46.h>
     12 
     13 #ifdef SKALIBS_IPV6_ENABLED
     14 
     15 int socket_remote46 (int s, ip46 *ip, uint16_t *port)
     16 {
     17   struct sockaddr_storage sa ;
     18   socklen_t dummy = sizeof sa ;
     19   if (getpeername(s, (struct sockaddr *)&sa, &dummy) < 0) return -1 ;
     20   if (sa.ss_family == AF_INET6)
     21   {
     22     struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&sa ;
     23     memcpy(ip->ip, sa6->sin6_addr.s6_addr, 16) ;
     24     *port = uint16_big(sa6->sin6_port) ;
     25     ip->is6 = 1 ;
     26   }
     27   else if (sa.ss_family == AF_INET)
     28   {
     29     struct sockaddr_in *sa4 = (struct sockaddr_in *)&sa ;
     30     memcpy(ip->ip, &sa4->sin_addr.s_addr, 4) ;
     31     *port = uint16_big(sa4->sin_port) ;
     32     ip->is6 = 0 ;
     33   }
     34   else return (errno = EAFNOSUPPORT, -1) ;
     35   return 0 ;
     36 }
     37 
     38 #endif