Use getaddrinfo instead of gethostbyname

[monky] / src / apcupsd.c

diff --git a/src/apcupsd.c b/src/apcupsd.c
index 2e23bf7..c7a40c9 100644 (file)
--- a/src/apcupsd.c
+++ b/src/apcupsd.c
@@ -164,44 +164,41 @@ int update_apcupsd(void) {
                memcpy(apc.items[i], "N/A", 4); // including \0
 
        do {
-               struct hostent* he = 0;
-               struct sockaddr_in addr;
+               struct addrinfo hints;
+               struct addrinfo *ai, *rp;
+               int res;
                short sz = 0;
-#ifdef HAVE_GETHOSTBYNAME_R
-               struct hostent he_mem;
-               int he_errno;
-               char hostbuff[2048];
-#endif
+               char portbuf[8];
                //
                // connect to apcupsd daemon
                //
-               sock = socket(AF_INET, SOCK_STREAM, 0);
-               if (sock < 0) {
-                       perror("socket");
+               memset(&hints, 0, sizeof(struct addrinfo));
+               hints.ai_family = AF_UNSPEC;
+               hints.ai_socktype = SOCK_STREAM;
+               hints.ai_flags = 0;
+               hints.ai_protocol = 0;
+               snprintf(portbuf, 8, "%d", info.apcupsd.port);
+               res = getaddrinfo(info.apcupsd.host, portbuf, &hints, &ai);
+               if (res != 0) {
+                       NORM_ERR("APCUPSD getaddrinfo: %s", gai_strerror(res));
                        break;
                }
-#ifdef HAVE_GETHOSTBYNAME_R
-               if (gethostbyname_r(info.apcupsd.host, &he_mem, hostbuff, sizeof(hostbuff), &he, &he_errno) || !he ) {
-                       NORM_ERR("APCUPSD gethostbyname_r: %s", hstrerror(h_errno));
-                       break;
-               }
-#else /* HAVE_GETHOSTBYNAME_R */
-               he = gethostbyname(info.apcupsd.host);
-               if (!he) {
-                       herror("gethostbyname");
-                       break;
+               for (rp = ai; rp != NULL; rp = rp->ai_next) {
+                       sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+                       if (sock == -1) {
+                               continue;
+                       }
+                       if (connect(sock, rp->ai_addr, rp->ai_addrlen) != -1) {
+                               break;
+                       }
+                       close(sock);
                }
-#endif /* HAVE_GETHOSTBYNAME_R */
-               
-               memset(&addr, 0, sizeof(addr));
-               addr.sin_family = AF_INET;
-               addr.sin_port = info.apcupsd.port;
-               memcpy(&addr.sin_addr, he->h_addr, he->h_length);
-               if (connect(sock, (struct sockaddr*)&addr, sizeof(struct sockaddr)) < 0) {
+               freeaddrinfo(ai);
+               if (rp == NULL) {
                        // no error reporting, the daemon is probably not running
                        break;
                }
-       
+
                //
                // send status request - "status" - 6B
                //