+struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) {
+ struct addrinfo *ai = NULL, hint = {0};
+ int err;
+
+ hint.ai_family = addressfamily;
+ hint.ai_socktype = socktype;
+
+#if HAVE_DECL_RES_INIT
+ // ensure glibc reloads /etc/resolv.conf.
+ res_init();
+#endif
+ err = getaddrinfo(address, service, &hint, &ai);
+
+ if(err) {
+ logger(LOG_WARNING, "Error looking up %s port %s: %s", address,
+ service, gai_strerror(err));
+ return NULL;
+ }
+
+ return ai;
+}
+
+sockaddr_t str2sockaddr(const char *address, const char *port) {
+ struct addrinfo *ai = NULL, hint = {0};
+ sockaddr_t result;
+ int err;
+
+ hint.ai_family = AF_UNSPEC;
+ hint.ai_flags = AI_NUMERICHOST;
+ hint.ai_socktype = SOCK_STREAM;
+
+ err = getaddrinfo(address, port, &hint, &ai);
+
+ if(err || !ai) {
+ ifdebug(SCARY_THINGS)
+ logger(LOG_DEBUG, "Unknown type address %s port %s", address, port);
+ result.sa.sa_family = AF_UNKNOWN;
+ result.unknown.address = xstrdup(address);
+ result.unknown.port = xstrdup(port);
+ return result;
+ }
+
+ memcpy(&result, ai->ai_addr, ai->ai_addrlen);
+ freeaddrinfo(ai);
+
+ return result;
+}
+
+void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
+ char address[NI_MAXHOST];
+ char port[NI_MAXSERV];
+ char *scopeid;
+ int err;
+
+ if(sa->sa.sa_family == AF_UNKNOWN) {
+ if(addrstr) {
+ *addrstr = xstrdup(sa->unknown.address);
+ }
+
+ if(portstr) {
+ *portstr = xstrdup(sa->unknown.port);
+ }
+
+ return;
+ }
+
+ err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
+
+ if(err) {
+ logger(LOG_ERR, "Error while translating addresses: %s",
+ gai_strerror(err));
+ abort();
+ }
+
+ scopeid = strchr(address, '%');
+
+ if(scopeid) {
+ *scopeid = '\0'; /* Descope. */
+ }
+
+ if(addrstr) {
+ *addrstr = xstrdup(address);
+ }
+
+ if(portstr) {
+ *portstr = xstrdup(port);
+ }
+}
+
+char *sockaddr2hostname(const sockaddr_t *sa) {
+ char *str;
+ char address[NI_MAXHOST] = "unknown";
+ char port[NI_MAXSERV] = "unknown";
+ int err;
+
+ if(sa->sa.sa_family == AF_UNKNOWN) {
+ xasprintf(&str, "%s port %s", sa->unknown.address, sa->unknown.port);
+ return str;
+ }
+
+ err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port),
+ hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
+
+ if(err) {
+ logger(LOG_ERR, "Error while looking up hostname: %s",
+ gai_strerror(err));
+ }
+
+ xasprintf(&str, "%s port %s", address, port);
+
+ return str;
+}
+
+int sockaddrcmp_noport(const sockaddr_t *a, const sockaddr_t *b) {
+ int result;
+
+ result = a->sa.sa_family - b->sa.sa_family;
+
+ if(result) {
+ return result;
+ }
+
+ switch(a->sa.sa_family) {
+ case AF_UNSPEC:
+ return 0;
+
+ case AF_UNKNOWN:
+ return strcmp(a->unknown.address, b->unknown.address);
+
+ case AF_INET:
+ return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
+
+ case AF_INET6:
+ return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
+
+ default:
+ logger(LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
+ a->sa.sa_family);
+ abort();
+ }
+}
+
+int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b) {
+ int result;
+
+ result = a->sa.sa_family - b->sa.sa_family;
+
+ if(result) {
+ return result;
+ }
+
+ switch(a->sa.sa_family) {
+ case AF_UNSPEC:
+ return 0;
+
+ case AF_UNKNOWN:
+ result = strcmp(a->unknown.address, b->unknown.address);
+
+ if(result) {
+ return result;
+ }
+
+ return strcmp(a->unknown.port, b->unknown.port);
+
+ case AF_INET:
+ result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
+
+ if(result) {
+ return result;
+ }
+
+ return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
+
+ case AF_INET6:
+ result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
+
+ if(result) {
+ return result;
+ }
+
+ return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
+
+ default:
+ logger(LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
+ a->sa.sa_family);
+ abort();
+ }