+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();
+ }
+}
+
+void sockaddrcpy(sockaddr_t *a, const sockaddr_t *b) {
+ if(b->sa.sa_family != AF_UNKNOWN) {
+ *a = *b;
+ } else {
+ a->unknown.family = AF_UNKNOWN;
+ a->unknown.address = xstrdup(b->unknown.address);
+ a->unknown.port = xstrdup(b->unknown.port);
+ }
+}
+
+void sockaddrfree(sockaddr_t *a) {
+ if(a->sa.sa_family == AF_UNKNOWN) {
+ free(a->unknown.address);
+ free(a->unknown.port);
+ }
+}
+
+void sockaddrunmap(sockaddr_t *sa) {
+ if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
+ sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
+ sa->in.sin_family = AF_INET;
+ }
+}
+
+void sockaddr_setport(sockaddr_t *sa, const char *port) {
+ uint16_t portnum = htons(atoi(port));
+ if(!portnum)
+ return;
+ switch(sa->sa.sa_family) {
+ case AF_INET:
+ sa->in.sin_port = portnum;
+ break;
+ case AF_INET6:
+ sa->in6.sin6_port = portnum;
+ break;
+ case AF_UNKNOWN:
+ free(sa->unknown.port);
+ sa->unknown.port = xstrdup(port);
+ default:
+ return;
+ }
+}
+
+/* Subnet mask handling */
+
+int maskcmp(const void *va, const void *vb, int masklen) {
+ int i, m, result;
+ const char *a = va;
+ const char *b = vb;
+
+ for(m = masklen, i = 0; m >= 8; m -= 8, i++) {
+ result = a[i] - b[i];
+ if(result)
+ return result;
+ }
+
+ if(m)
+ return (a[i] & (0x100 - (1 << (8 - m)))) -
+ (b[i] & (0x100 - (1 << (8 - m))));
+
+ return 0;
+}
+
+void mask(void *va, int masklen, int len) {
+ int i;
+ char *a = va;
+
+ i = masklen / 8;
+ masklen %= 8;
+
+ if(masklen)
+ a[i++] &= (0x100 - (1 << (8 - masklen)));
+
+ for(; i < len; i++)
+ a[i] = 0;