- va_list ap;
- va_start(ap, format);
- vfprintf(stderr, format, ap);
- va_end(ap);
- if (errno) {
- fprintf(stderr, ": ");
- perror(NULL);
- fprintf(stderr, "errno=%d\n", errno);
- } else
- fprintf(stderr, "\n");
- exit(1);
-}
-
-void err(char *format, ...) {
- extern int errno;
-
- va_list ap;
- va_start(ap, format);
- vfprintf(stderr, format, ap);
- va_end(ap);
- if (errno) {
- fprintf(stderr, ": ");
- perror(NULL);
- fprintf(stderr, "errno=%d\n", errno);
- } else
- fprintf(stderr, "\n");
-}
-
-char *addr2string(struct sockaddr *addr, socklen_t len) {
- struct sockaddr_in6 *sa6;
- struct sockaddr_in sa4;
- static char addr_buf[2][INET6_ADDRSTRLEN];
- static int i = 0;
- i = !i;
- if (addr->sa_family == AF_INET6) {
- sa6 = (struct sockaddr_in6 *)addr;
- if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
- memset(&sa4, 0, sizeof(sa4));
- sa4.sin_family = AF_INET;
- sa4.sin_port = sa6->sin6_port;
- memcpy(&sa4.sin_addr, &sa6->sin6_addr.s6_addr[12], 4);
- addr = (struct sockaddr *)&sa4;
- }
- }
- if (getnameinfo(addr, len, addr_buf[i], sizeof(addr_buf[i]),
- NULL, 0, NI_NUMERICHOST)) {
- err("getnameinfo");
- return NULL;
- }
- return addr_buf[i];
-}
-
-int bindport(int type, char *port) {
- struct addrinfo hints, *res0, *res;
- int s;
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_socktype = type;
- hints.ai_family = AF_UNSPEC;
- hints.ai_flags = AI_PASSIVE;
-
- if (getaddrinfo(NULL, port, &hints, &res0) != 0) {
- err("bindport: can't resolve port %s", port);
- return -1;
- }
- for (res = res0; res; res = res->ai_next) {
- s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
- if (s >= 0) {
- if (bind(s, res->ai_addr, res->ai_addrlen) == 0)
- break;
- close(s);
- s = -1;
- }
- }
- freeaddrinfo(res0);
- return s;
-}
-
-int connectport(int type, char *host, char *port) {
- struct addrinfo hints, *res0, *res;
- int s;
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_socktype = type;
- hints.ai_family = AF_UNSPEC;