+void port_set(struct sockaddr *sa, uint16_t port) {
+ switch (sa->sa_family) {
+ case AF_INET:
+ ((struct sockaddr_in *)sa)->sin_port = htons(port);
+ break;
+ case AF_INET6:
+ ((struct sockaddr_in6 *)sa)->sin6_port = htons(port);
+ break;
+ }
+}
+
+struct sockaddr *addr_copy(struct sockaddr *in) {
+ struct sockaddr *out = NULL;
+
+ switch (in->sa_family) {
+ case AF_INET:
+ out = malloc(sizeof(struct sockaddr_in));
+ if (out) {
+ memset(out, 0, sizeof(struct sockaddr_in));
+ ((struct sockaddr_in *)out)->sin_addr = ((struct sockaddr_in *)in)->sin_addr;
+ }
+ break;
+ case AF_INET6:
+ out = malloc(sizeof(struct sockaddr_in6));
+ if (out) {
+ memset(out, 0, sizeof(struct sockaddr_in6));
+ ((struct sockaddr_in6 *)out)->sin6_addr = ((struct sockaddr_in6 *)in)->sin6_addr;
+ }
+ break;
+ }
+ out->sa_family = in->sa_family;
+#ifdef SIN6_LEN
+ out->sa_len = in->sa_len;
+#endif
+ return out;
+}
+
+char *addr2string(struct sockaddr *addr) {