Dopo notevoli ingrullimenti abbiamo il server WEB di esempio!

[gapil.git] / sources / SockUtil.c

diff --git a/sources/SockUtil.c b/sources/SockUtil.c
index 0bbaa79605fec851784e93ca729ccf1825f746e9..28b22defae96326ad406f723a85bea0484316bb2 100644 (file)
--- a/sources/SockUtil.c
+++ b/sources/SockUtil.c
@@ -193,3 +193,70 @@ int sockbind(char *host, char *serv, int prot, int type)
     freeaddrinfo(save);                    /* done, release memory */
     return sock;
 }
+/****************************************************************
+ *
+ * Routine sockbind2
+ * Return a binded socket given hostname, service, and socket type
+ * Issue a SO_REUSEADDR on the socket before binding.
+ *
+ * Author: Simone Piccardi
+ * Mar. 2005
+ *
+ * $Id$ 
+ *
+ ****************************************************************/
+int sockbind2(char *host, char *serv, int prot, int type) 
+{
+    struct addrinfo hint, *addr, *save;
+    int res;
+    int sock;
+    int opt=1;
+    char buf[INET6_ADDRSTRLEN];
+    /* 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 */
+       fprintf(stderr, "sockbind: resolution failed:");
+//     fprintf(stderr, "host %s, service %s, protocol %d", host, serv, prot);
+       fprintf(stderr, " %s\n", gai_strerror(res));
+       errno = 0;                         /* clear errno */
+       return -1;
+    }
+    save = addr;                           /* saving for freeaddrinfo */
+    while (addr != NULL) {                 /* loop on possible addresses */
+       /* get a socket */
+       sock = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
+       if (sock < 0) {                    /* on error */
+           if (addr->ai_next != NULL) {   /* if other addresses */
+               addr=addr->ai_next;        /* take next */
+               continue;                  /* restart cycle */
+           } else {                       /* else stop */
+               perror("sockbind: cannot create socket");
+               return sock;
+           }
+       }
+       /* connect the socket */
+       if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt))) {
+           printf("error on socket options\n");
+           return -1;
+       }
+       printf("Indirizzo %s\n", ip_ntop(addr, buf, sizeof(buf)));
+       if ( (res = bind(sock, addr->ai_addr, addr->ai_addrlen)) < 0) {
+           if (addr->ai_next != NULL) {   /* if other addresses */
+               addr=addr->ai_next;        /* take next */
+               close(sock);               /* close socket */
+               continue;                  /* restart cycle */
+           } else {                       /* else stop */
+               perror("sockbind: cannot connect");
+               close(sock);
+               return res;
+           }
+       } else break;                      /* ok, we are binded! */
+    }
+    freeaddrinfo(save);                    /* done, release memory */
+    return sock;
+}