Add ipv6 ice candidates

src/address.c

@@ -1,5 +1,11 @@
 #include <stdlib.h>
 #include <stdint.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
 #include "address.h"
 
 int addr_ipv4_validate(const char *ipv4, size_t len, Address *addr) {
@@ -21,6 +27,49 @@ int addr_ipv4_validate(const char *ipv4, size_t len, Address *addr) {
       return 0;
     }
   }
+  addr->family = AF_INET;
+  return 1;
+}
+
+int addr_ipv6_validate(const char *ipv6, size_t len, Address *addr) {
+  int ret;
+  struct sockaddr_in6 sa6;
+  char astring[INET6_ADDRSTRLEN];
+  ret = inet_pton(AF_INET6, ipv6, &(sa6.sin6_addr));
+  inet_ntop(AF_INET6, &(sa6.sin6_addr), astring, INET6_ADDRSTRLEN);
+  memcpy(addr->ipv6, sa6.sin6_addr.s6_addr, 16);
+  return ret;
+}
+
+int addr_to_text(const Address *addr, char *buf, size_t len) {
+
+  switch (addr->family) {
+   case AF_INET:
+    return inet_ntop(AF_INET, addr->ipv4, buf, len) != NULL;
+    break;
+   case AF_INET6:
+    return inet_ntop(AF_INET6, addr->ipv6, buf, len) != NULL;
+    break;
+  }
+  return 0;
+}
+
+int addr_equal(const Address *a, const Address *b) {
+  if (a->family != b->family) {
+    return 0;
+  }
+
+  switch (a->family) {
+   case AF_INET:
+    for (int i = 0; i < 4; i++) {
+      if (a->ipv4[i] != b->ipv4[i]) {
+	return 0;
+      }
+    }
+    break;
+   case AF_INET6:
+    break;
+  }
 
   return 1;
 }

src/address.h

@@ -10,10 +10,16 @@ struct Address {
   uint8_t family;
   uint16_t port;
   uint8_t ipv4[4];
-  uint8_t ipv6[16];
+  uint16_t ipv6[8];
 
-}__attribute__((packed));
+};
+
+int addr_ipv6_validate(const char *ipv6, size_t len, Address *addr);
 
 int addr_ipv4_validate(const char *ipv4, size_t len, Address *addr);
 
+int addr_to_text(const Address *addr, char *buf, size_t len);
+
+int addr_equal(const Address *a, const Address *b);
+
 #endif // ADDRESS_H_