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

[gapil.git] / listati / sockbind.c

diff --git a/listati/sockbind.c b/listati/sockbind.c
new file mode 100644 (file)
index 0000000..ddf48d8
--- /dev/null
+++ b/listati/sockbind.c
@@ -0,0 +1,32 @@
+int sockbind(char *host, char *serv, int prot, int type) 
+{
+    struct addrinfo hint, *addr;
+    int res;
+    int sock;
+    /* initialize hint structure */
+    memset(&hint, 0, sizeof(struct addrinfo)); 
+    hint.ai_flags = AI_PASSIVE;          /* address for binding */
+    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("sockbind 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) {
+       printf("sockconn cannot create socket\n");
+       return sock;
+    }
+    /* connect the socket */
+    res = bind(sock, addr->ai_addr, addr->ai_addrlen);
+    if (res < 0) {
+       printf("sockconn cannot bind socket\n");
+       return res;
+    }
+    freeaddrinfo(addr);         /* done, release memory */
+    return sock;
+}