Hidden AF_INET* inside sysdep/

lib/socket.h

@@ -43,7 +43,7 @@ typedef struct birdsock {
   uint lifindex;			/* local interface that received the datagram */
   /* laddr and lifindex are valid only if SKF_LADDR_RX flag is set to request it */
 
-  int af;				/* Address family (AF_INET, AF_INET6 or 0 for non-IP) of fd */
+  int fam;				/* Address family (SK_FAM_* or 0 for non-IP) of fd */
   int fd;				/* System-dependent data */
   int index;				/* Index in poll buffer */
   int rcv_ttl;				/* TTL of last received datagram */
@@ -115,6 +115,12 @@ extern int sk_priority_control;		/* Suggested priority for control traffic, shou
 #define SK_UNIX_PASSIVE	8
 #define SK_UNIX		9
 
+/* Socket families */
+
+#define SK_FAM_NONE	0
+#define SK_FAM_IPV4	4
+#define SK_FAM_IPV6	6
+
 /*
  *  For SK_UDP or SK_IP sockets setting DA/DP allows to use sk_send(),
  *  otherwise sk_send_to() must be used.

proto/bfd/packets.c

@@ -204,11 +204,11 @@ bfd_open_rx_sk(struct bfd_proto *p, int multihop, int inet_version)
 
   switch (inet_version) {
     case 4:
-      sk->af = AF_INET;
+      sk->fam = SK_FAM_IPV4;
       sk->flags |= SKF_V4ONLY;
       break;
     case 6:
-      sk->af = AF_INET6;
+      sk->fam = SK_FAM_IPV6;
       sk->flags |= SKF_V6ONLY;
       break;
     default:
@@ -247,10 +247,10 @@ bfd_open_tx_sk(struct bfd_proto *p, ip_addr local, struct iface *ifa)
   sk->flags = SKF_THREAD | SKF_BIND | SKF_HIGH_PORT;
 
   if (ipa_is_ip4(local)) {
-    sk->af = AF_INET;
+    sk->fam = SK_FAM_IPV4;
     sk->flags |= SKF_V4ONLY;
   } else {
-    sk->af = AF_INET6;
+    sk->fam = SK_FAM_IPV6;
     sk->flags |= SKF_V6ONLY;
   }
 

proto/ospf/iface.c

@@ -111,7 +111,7 @@ ospf_sk_open(struct ospf_iface *ifa)
   sk->dport = OSPF_PROTO;
   sk->saddr = ifa->addr->ip;
   sk->iface = ifa->iface;
-  sk->af = ospf_is_v2(p) ? AF_INET : AF_INET6;
+  sk->fam = ospf_is_v2(p) ? SK_FAM_IPV4 : SK_FAM_IPV6;
 
   sk->tos = ifa->cf->tx_tos;
   sk->priority = ifa->cf->tx_priority;
@@ -194,7 +194,7 @@ ospf_open_vlink_sk(struct ospf_proto *p)
   sock *sk = sk_new(p->p.pool);
   sk->type = SK_IP;
   sk->dport = OSPF_PROTO;
-  sk->af = ospf_is_v2(p) ? AF_INET : AF_INET6;
+  sk->fam = ospf_is_v2(p) ? SK_FAM_IPV4 : SK_FAM_IPV6;
 
   /* FIXME: configurable tos/priority ? */
   sk->tos = IP_PREC_INTERNET_CONTROL;

proto/radv/packets.c

@@ -412,7 +412,7 @@ radv_sk_open(struct radv_iface *ifa)
   sk->type = SK_IP;
   sk->dport = ICMPV6_PROTO;
   sk->saddr = ifa->addr->ip;
-  sk->af = AF_INET6;
+  sk->fam = SK_FAM_IPV6;
 
   sk->ttl = 255; /* Mandatory for Neighbor Discovery packets */
   sk->rx_hook = radv_rx_hook;

proto/rip/packets.c

@@ -713,7 +713,7 @@ rip_open_socket(struct rip_iface *ifa)
 
   sock *sk = sk_new(p->p.pool);
   sk->type = SK_UDP;
-  sk->af = rip_is_v2(p) ? AF_INET : AF_INET6;
+  sk->fam = rip_is_v2(p) ? SK_FAM_IPV4 : SK_FAM_IPV6;
   sk->sport = ifa->cf->port;
   sk->dport = ifa->cf->port;
   sk->iface = ifa->iface;

sysdep/linux/sysio.h

@@ -184,7 +184,7 @@ sk_set_md5_auth(sock *s, ip_addr a, struct iface *ifa, char *passwd)
   struct tcp_md5sig md5;
 
   memset(&md5, 0, sizeof(md5));
-  sockaddr_fill((sockaddr *) &md5.tcpm_addr, s->af, a, ifa, 0);
+  sockaddr_fill((sockaddr *) &md5.tcpm_addr, fam_to_af[s->fam], a, ifa, 0);
 
   if (passwd)
   {

sysdep/unix/io.c

@@ -585,6 +585,7 @@ sockaddr_read(sockaddr *sa, int af, ip_addr *a, struct iface **ifa, uint *port)
   return -1;
 }
 
+const int fam_to_af[] = { [SK_FAM_IPV4] = AF_INET, [SK_FAM_IPV6] = AF_INET6 };
 
 /*
  *	IPv6 multicast syscalls
@@ -1184,7 +1185,7 @@ sk_setup(sock *s)
   if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
     ERR("O_NONBLOCK");
 
-  if (!s->af)
+  if (!s->fam)
     return 0;
 
   if (ipa_nonzero(s->saddr) && !(s->flags & SKF_BIND))
@@ -1286,7 +1287,7 @@ sk_tcp_connected(sock *s)
   int sa_len = sizeof(sa);
 
   if ((getsockname(s->fd, &sa.sa, &sa_len) < 0) ||
-      (sockaddr_read(&sa, s->af, &s->saddr, &s->iface, &s->sport) < 0))
+      (sockaddr_read(&sa, fam_to_af[s->fam], &s->saddr, &s->iface, &s->sport) < 0))
     log(L_WARN "SOCK: Cannot get local IP address for TCP>");
 
   s->type = SK_TCP;
@@ -1311,7 +1312,7 @@ sk_passive_connected(sock *s, int type)
 
   sock *t = sk_new(s->pool);
   t->type = type;
-  t->af = s->af;
+  t->fam = s->fam;
   t->fd = fd;
   t->ttl = s->ttl;
   t->tos = s->tos;
@@ -1321,10 +1322,10 @@ sk_passive_connected(sock *s, int type)
   if (type == SK_TCP)
   {
     if ((getsockname(fd, &loc_sa.sa, &loc_sa_len) < 0) ||
-	(sockaddr_read(&loc_sa, s->af, &t->saddr, &t->iface, &t->sport) < 0))
+	(sockaddr_read(&loc_sa, fam_to_af[s->fam], &t->saddr, &t->iface, &t->sport) < 0))
       log(L_WARN "SOCK: Cannot get local IP address for TCP<");
 
-    if (sockaddr_read(&rem_sa, s->af, &t->daddr, &t->iface, &t->dport) < 0)
+    if (sockaddr_read(&rem_sa, fam_to_af[s->fam], &t->daddr, &t->iface, &t->dport) < 0)
       log(L_WARN "SOCK: Cannot get remote IP address for TCP<");
   }
 
@@ -1383,28 +1384,28 @@ sk_open(sock *s)
     s->ttx = "";			/* Force s->ttx != s->tpos */
     /* Fall thru */
   case SK_TCP_PASSIVE:
-    fd = socket(s->af, SOCK_STREAM, IPPROTO_TCP);
+    fd = socket(fam_to_af[s->fam], SOCK_STREAM, IPPROTO_TCP);
     bind_port = s->sport;
     bind_addr = s->saddr;
     do_bind = bind_port || ipa_nonzero(bind_addr);
     break;
 
   case SK_UDP:
-    fd = socket(s->af, SOCK_DGRAM, IPPROTO_UDP);
+    fd = socket(fam_to_af[s->fam], SOCK_DGRAM, IPPROTO_UDP);
     bind_port = s->sport;
     bind_addr = (s->flags & SKF_BIND) ? s->saddr : IPA_NONE;
     do_bind = 1;
     break;
 
   case SK_IP:
-    fd = socket(s->af, SOCK_RAW, s->dport);
+    fd = socket(fam_to_af[s->fam], SOCK_RAW, s->dport);
     bind_port = 0;
     bind_addr = (s->flags & SKF_BIND) ? s->saddr : IPA_NONE;
     do_bind = ipa_nonzero(bind_addr);
     break;
 
   case SK_MAGIC:
-    s->af = 0;
+    s->fam = SK_FAM_NONE;
     fd = s->fd;
     break;
 
@@ -1446,7 +1447,7 @@ sk_open(sock *s)
 	if (sk_set_high_port(s) < 0)
 	  log(L_WARN "Socket error: %s%#m", s->err);
 
-    sockaddr_fill(&sa, s->af, bind_addr, s->iface, bind_port);
+    sockaddr_fill(&sa, fam_to_af[s->fam], bind_addr, s->iface, bind_port);
     if (bind(fd, &sa.sa, SA_LEN(sa)) < 0)
       ERR2("bind");
   }
@@ -1458,7 +1459,7 @@ sk_open(sock *s)
   switch (s->type)
   {
   case SK_TCP_ACTIVE:
-    sockaddr_fill(&sa, s->af, s->daddr, s->iface, s->dport);
+    sockaddr_fill(&sa, fam_to_af[s->fam], s->daddr, s->iface, s->dport);
     if (connect(fd, &sa.sa, SA_LEN(sa)) >= 0)
       sk_tcp_connected(s);
     else if (errno != EINTR && errno != EAGAIN && errno != EINPROGRESS &&
@@ -1565,7 +1566,7 @@ sk_sendmsg(sock *s)
   byte cmsg_buf[CMSG_TX_SPACE];
   sockaddr dst;
 
-  sockaddr_fill(&dst, s->af, s->daddr, s->iface, s->dport);
+  sockaddr_fill(&dst, fam_to_af[s->fam], s->daddr, s->iface, s->dport);
 
   struct msghdr msg = {
     .msg_name = &dst.sa,
@@ -1618,7 +1619,7 @@ sk_recvmsg(sock *s)
   //    rv = ipv4_skip_header(pbuf, rv);
   //endif
 
-  sockaddr_read(&src, s->af, &s->faddr, NULL, &s->fport);
+  sockaddr_read(&src, fam_to_af[s->fam], &s->faddr, NULL, &s->fport);
   sk_process_cmsgs(s, &msg);
 
   if (msg.msg_flags & MSG_TRUNC)
@@ -1840,7 +1841,7 @@ sk_write(sock *s)
   case SK_TCP_ACTIVE:
     {
       sockaddr sa;
-      sockaddr_fill(&sa, s->af, s->daddr, s->iface, s->dport);
+      sockaddr_fill(&sa, fam_to_af[s->fam], s->daddr, s->iface, s->dport);
 
       if (connect(s->fd, &sa.sa, SA_LEN(sa)) >= 0 || errno == EISCONN)
 	sk_tcp_connected(s);
@@ -1861,10 +1862,10 @@ sk_write(sock *s)
 }
 
 int sk_is_ipv4(sock *s)
-{ return s->af == AF_INET; }
+{ return s->fam == SK_FAM_IPV4; }
 
 int sk_is_ipv6(sock *s)
-{ return s->af == AF_INET6; }
+{ return s->fam == SK_FAM_IPV6; }
 
 void
 sk_dump_all(void)

sysdep/unix/unix.h

@@ -102,6 +102,7 @@ int sk_open_unix(struct birdsock *s, char *name);
 void *tracked_fopen(struct pool *, char *name, char *mode);
 void test_old_bird(char *path);
 
+extern const int fam_to_af[];
 
 /* krt.c bits */