socket_recv4.c (568B)
1 /* ISC license. */ 2 3 #include <skalibs/nonposix.h> 4 5 #include <sys/socket.h> 6 #include <netinet/in.h> 7 #include <string.h> 8 #include <errno.h> 9 10 #include <skalibs/uint16.h> 11 #include <skalibs/socket.h> 12 13 ssize_t socket_recv4 (int s, char *buf, size_t len, char *ip, uint16_t *port) 14 { 15 ssize_t r ; 16 struct sockaddr_in sa ; 17 socklen_t dummy = sizeof sa ; 18 do r = recvfrom(s, buf, len, 0, (struct sockaddr *)&sa, &dummy) ; 19 while ((r == -1) && (errno == EINTR)) ; 20 if (r == -1) return -1 ; 21 memcpy(ip, &sa.sin_addr, 4) ; 22 *port = uint16_big(sa.sin_port) ; 23 return r ; 24 }