Completata la parte su getaddinfo con delle funzioni di ausilio per chiamare

[gapil.git] / sources / sockconn.c

diff --git a/sources/sockconn.c b/sources/sockconn.c
index c1624743d8d0054224a39f00211359bb5559b36d..81c982d0481ec37036f48aa5167b70a9efd88867 100644 (file)
--- a/sources/sockconn.c
+++ b/sources/sockconn.c
@@ -30,36 +30,39 @@
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdio.h>
 #include <errno.h>
 
 int sockconn(char *host, char *serv, int prot, int type) 
 {
     struct addrinfo hint, *addr;
     int res;
-    int sock
-    /* initialize hint */
-    memset(&hint, 0, sizeof(hint)); 
-    hint.ai_family = PF_UNSPEC;
-    hint.ai_protocol = prot;
-    hint.ai_socktype = type;
-    res = getaddrinfo(host, serv, &hint, &addr);
-    if (res != 0) {
-       printf("sockconn cannot resolve host %s, service %s,
-                protocol %d: %s\n", host, serv, prot, gai_strerror(res));
-       errno = 0;
+    int sock;
+    /* initialize hint structure */
+    memset(&hint, 0, sizeof(struct addrinfo)); 
+    hint.ai_family = PF_UNSPEC;          /* generic address (IPv4 or IPv6) */
+    hint.ai_protocol = prot;             /* protocol */
+    hint.ai_socktype = type;             /* socket type */
+    res = getaddrinfo(host, serv, &hint, &addr);   /* calling getaddrinfo */
+    if (res != 0) {                                /* on error exit */
+       printf("sockconn cannot resolve host %s, service %s, ", host, serv);
+       printf("protocol %d: %s\n", prot, gai_strerror(res));
        return -1;
     }
+    /* get a socket */
     sock = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
     if (sock < 0) {
-       perror("sockconn cannot create socket\n");
+       printf("sockconn cannot create socket\n");
        return sock;
     }
+    /* connect the socket */
     res = connect(sock, addr->ai_addr, addr->ai_addrlen);
     if (res < 0) {
-       perror("sockconn cannot connect socket\n");
+       printf("sockconn cannot connect socket\n");
        return res;
     }
-    freeaddrinfo(addr);
+    freeaddrinfo(addr);         /* done, release memory */
     return sock;
 }
-