[socket-nif] Add support for socket (level ip) option recvorigdstaddr

Added support for ip level socket option RECVORIGDSTADDR.
This option requires recvmsg to actually use, so we cannot
test this fully at the moment (although both set and get works).

OTP-14831

4 files changed, 153 insertions, 17 deletions

diff --git a/erts/doc/src/socket_usage.xml b/erts/doc/src/socket_usage.xml
index 79cafa0162..f69aa75820 100644
--- a/erts/doc/src/socket_usage.xml
+++ b/erts/doc/src/socket_usage.xml
@@ -373,6 +373,13 @@
 	<cell>type = dgram</cell>
       </row>
       <row>
+	<cell>recvdstaddr</cell>
+	<cell>boolean()</cell>
+	<cell>yes</cell>
+	<cell>yes</cell>
+	<cell>type = dgram</cell>
+      </row>
+      <row>
 	<cell>recverr</cell>
 	<cell>boolean()</cell>
 	<cell>yes</cell>
@@ -394,6 +401,13 @@
 	<cell>type =/= stream</cell>
       </row>
       <row>
+	<cell>recvorigdstaddr</cell>
+	<cell>boolean()</cell>
+	<cell>yes</cell>
+	<cell>yes</cell>
+	<cell>none</cell>
+      </row>
+      <row>
 	<cell>recvttl</cell>
 	<cell>boolean()</cell>
 	<cell>yes</cell>
diff --git a/erts/emulator/nifs/common/socket_nif.c b/erts/emulator/nifs/common/socket_nif.c
index 288188d2dd..4ba94f4f60 100644
--- a/erts/emulator/nifs/common/socket_nif.c
+++ b/erts/emulator/nifs/common/socket_nif.c
@@ -531,9 +531,11 @@ typedef union {
 #define SOCKET_OPT_IP_MULTICAST_TTL          16
 #define SOCKET_OPT_IP_NODEFRAG               17
 #define SOCKET_OPT_IP_PKTINFO                19
-#define SOCKET_OPT_IP_RECVERR                20
-#define SOCKET_OPT_IP_RECVIF                 21
+#define SOCKET_OPT_IP_RECVDSTADDR            20
+#define SOCKET_OPT_IP_RECVERR                21
+#define SOCKET_OPT_IP_RECVIF                 22
 #define SOCKET_OPT_IP_RECVOPTS               23
+#define SOCKET_OPT_IP_RECVORIGDSTADDR        24
 #define SOCKET_OPT_IP_RECVTOS                25
 #define SOCKET_OPT_IP_RECVTTL                26
 #define SOCKET_OPT_IP_RETOPTS                27
@@ -1171,6 +1173,11 @@ static ERL_NIF_TERM nsetopt_lvl_ip_pktinfo(ErlNifEnv*        env,
                                            SocketDescriptor* descP,
                                            ERL_NIF_TERM      eVal);
 #endif
+#if defined(IP_RECVDSTADDR)
+static ERL_NIF_TERM nsetopt_lvl_ip_recvdstaddr(ErlNifEnv*        env,
+                                               SocketDescriptor* descP,
+                                               ERL_NIF_TERM      eVal);
+#endif
 #if defined(IP_RECVERR)
 static ERL_NIF_TERM nsetopt_lvl_ip_recverr(ErlNifEnv*        env,
                                            SocketDescriptor* descP,
@@ -1186,6 +1193,11 @@ static ERL_NIF_TERM nsetopt_lvl_ip_recvopts(ErlNifEnv*        env,
                                             SocketDescriptor* descP,
                                             ERL_NIF_TERM      eVal);
 #endif
+#if defined(IP_RECVORIGDSTADDR)
+static ERL_NIF_TERM nsetopt_lvl_ip_recvorigdstaddr(ErlNifEnv*        env,
+                                                   SocketDescriptor* descP,
+                                                   ERL_NIF_TERM      eVal);
+#endif
 #if defined(IP_RECVTOS)
 static ERL_NIF_TERM nsetopt_lvl_ip_recvtos(ErlNifEnv*        env,
                                            SocketDescriptor* descP,
@@ -1592,6 +1604,10 @@ static ERL_NIF_TERM ngetopt_lvl_ip_nodefrag(ErlNifEnv*        env,
 static ERL_NIF_TERM ngetopt_lvl_ip_pktinfo(ErlNifEnv*        env,
                                            SocketDescriptor* descP);
 #endif
+#if defined(IP_RECVDSTADDRS)
+static ERL_NIF_TERM ngetopt_lvl_ip_recvdstaddr(ErlNifEnv*        env,
+                                               SocketDescriptor* descP);
+#endif
 #if defined(IP_RECVERR)
 static ERL_NIF_TERM ngetopt_lvl_ip_recverr(ErlNifEnv*        env,
                                            SocketDescriptor* descP);
@@ -1604,6 +1620,10 @@ static ERL_NIF_TERM ngetopt_lvl_ip_recvif(ErlNifEnv*        env,
 static ERL_NIF_TERM ngetopt_lvl_ip_recvopts(ErlNifEnv*        env,
                                             SocketDescriptor* descP);
 #endif
+#if defined(IP_RECVORIGDSTADDR)
+static ERL_NIF_TERM ngetopt_lvl_ip_recvorigdstaddr(ErlNifEnv*        env,
+                                                   SocketDescriptor* descP);
+#endif
 #if defined(IP_RECVTOS)
 static ERL_NIF_TERM ngetopt_lvl_ip_recvtos(ErlNifEnv*        env,
                                            SocketDescriptor* descP);
@@ -5051,6 +5071,12 @@ ERL_NIF_TERM nsetopt_lvl_ip(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(IP_RECVDSTADDR)
+    case SOCKET_OPT_IP_RECVDSTADDR:
+        result = nsetopt_lvl_ip_recvdstaddr(env, descP, eVal);
+        break;
+#endif
+
 #if defined(IP_RECVERR)
     case SOCKET_OPT_IP_RECVERR:
         result = nsetopt_lvl_ip_recverr(env, descP, eVal);
@@ -5069,6 +5095,12 @@ ERL_NIF_TERM nsetopt_lvl_ip(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(IP_RECVORIGDSTADDR)
+    case SOCKET_OPT_IP_RECVORIGDSTADDR:
+        result = nsetopt_lvl_ip_recvorigdstaddr(env, descP, eVal);
+        break;
+#endif
+
 #if defined(IP_RECVTOS)
     case SOCKET_OPT_IP_RECVTOS:
         result = nsetopt_lvl_ip_recvtos(env, descP, eVal);
@@ -5605,6 +5637,25 @@ ERL_NIF_TERM nsetopt_lvl_ip_pktinfo(ErlNifEnv*        env,
 #endif
 
 
+/* nsetopt_lvl_ip_recvdstaddr - Level IP RECVDSTADDR option
+ */
+#if defined(IP_RECVDSTADDR)
+static
+ERL_NIF_TERM nsetopt_lvl_ip_recvdstaddr(ErlNifEnv*        env,
+                                        SocketDescriptor* descP,
+                                        ERL_NIF_TERM      eVal)
+{
+#if defined(SOL_IP)
+    int level = SOL_IP;
+#else
+    int level = IPPROTO_IP;
+#endif
+
+    return nsetopt_bool_opt(env, descP, level, IP_RECVDSTADDR, eVal);
+}
+#endif
+
+
 /* nsetopt_lvl_ip_recverr - Level IP RECVERR option
  */
 #if defined(IP_RECVERR)
@@ -5662,6 +5713,25 @@ ERL_NIF_TERM nsetopt_lvl_ip_recvopts(ErlNifEnv*        env,
 #endif
 
 
+/* nsetopt_lvl_ip_recvorigdstaddr - Level IP RECVORIGDSTADDR option
+ */
+#if defined(IP_RECVORIGDSTADDR)
+static
+ERL_NIF_TERM nsetopt_lvl_ip_recvorigdstaddr(ErlNifEnv*        env,
+                                            SocketDescriptor* descP,
+                                            ERL_NIF_TERM      eVal)
+{
+#if defined(SOL_IP)
+    int level = SOL_IP;
+#else
+    int level = IPPROTO_IP;
+#endif
+
+    return nsetopt_bool_opt(env, descP, level, IP_RECVORIGDSTADDR, eVal);
+}
+#endif
+
+
 /* nsetopt_lvl_ip_recvtos - Level IP RECVTOS option
  */
 #if defined(IP_RECVTOS)
@@ -8294,6 +8364,12 @@ ERL_NIF_TERM ngetopt_lvl_ip(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(IP_RECVDSTADDR)
+    case SOCKET_OPT_IP_RECVDSTADDR:
+        result = ngetopt_lvl_ip_recvdstaddr(env, descP);
+        break;
+#endif
+
 #if defined(IP_RECVERR)
     case SOCKET_OPT_IP_RECVERR:
         result = ngetopt_lvl_ip_recverr(env, descP);
@@ -8312,6 +8388,12 @@ ERL_NIF_TERM ngetopt_lvl_ip(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(IP_RECVORIGDSTADDR)
+    case SOCKET_OPT_IP_RECVORIGDSTADDR:
+        result = ngetopt_lvl_ip_recvorigdstaddr(env, descP);
+        break;
+#endif
+
 #if defined(IP_RECVTOS)
     case SOCKET_OPT_IP_RECVTOS:
         result = ngetopt_lvl_ip_recvtos(env, descP);
@@ -8620,12 +8702,12 @@ ERL_NIF_TERM ngetopt_lvl_ip_recvtos(ErlNifEnv*        env,
 #endif
 
 
-/* ngetopt_lvl_ip_recvif - Level IP RECVIF option
+/* ngetopt_lvl_ip_recvdstaddr - Level IP RECVDSTADDR option
  */
-#if defined(IP_RECVIF)
+#if defined(IP_RECVDSTADDR)
 static
-ERL_NIF_TERM ngetopt_lvl_ip_recvif(ErlNifEnv*        env,
-                                   SocketDescriptor* descP)
+ERL_NIF_TERM ngetopt_lvl_ip_recvdstaddr(ErlNifEnv*        env,
+                                        SocketDescriptor* descP)
 {
 #if defined(SOL_IP)
     int level = SOL_IP;
@@ -8633,7 +8715,7 @@ ERL_NIF_TERM ngetopt_lvl_ip_recvif(ErlNifEnv*        env,
     int level = IPPROTO_IP;
 #endif
 
-    return ngetopt_bool_opt(env, descP, level, IP_RECVIF);
+    return ngetopt_bool_opt(env, descP, level, IP_RECVDSTADDR);
 }
 #endif
 
@@ -8656,6 +8738,24 @@ ERL_NIF_TERM ngetopt_lvl_ip_recverr(ErlNifEnv*        env,
 #endif
 
 
+/* ngetopt_lvl_ip_recvif - Level IP RECVIF option
+ */
+#if defined(IP_RECVIF)
+static
+ERL_NIF_TERM ngetopt_lvl_ip_recvif(ErlNifEnv*        env,
+                                   SocketDescriptor* descP)
+{
+#if defined(SOL_IP)
+    int level = SOL_IP;
+#else
+    int level = IPPROTO_IP;
+#endif
+
+    return ngetopt_bool_opt(env, descP, level, IP_RECVIF);
+}
+#endif
+
+
 /* ngetopt_lvl_ip_recvopt - Level IP RECVOPTS option
  */
 #if defined(IP_RECVOPTS)
@@ -8674,6 +8774,24 @@ ERL_NIF_TERM ngetopt_lvl_ip_recvopts(ErlNifEnv*        env,
 #endif
 
 
+/* ngetopt_lvl_ip_recvorigdstaddr - Level IP RECVORIGDSTADDR option
+ */
+#if defined(IP_RECVORIGDSTADDR)
+static
+ERL_NIF_TERM ngetopt_lvl_ip_recvorigdstaddr(ErlNifEnv*        env,
+                                            SocketDescriptor* descP)
+{
+#if defined(SOL_IP)
+    int level = SOL_IP;
+#else
+    int level = IPPROTO_IP;
+#endif
+
+    return ngetopt_bool_opt(env, descP, level, IP_RECVORIGDSTADDR);
+}
+#endif
+
+
 /* ngetopt_lvl_ip_recvttl - Level IP RECVTTL option
  */
 #if defined(IP_RECVTTL)
diff --git a/erts/preloaded/ebin/socket.beam b/erts/preloaded/ebin/socket.beam
index 9c626feff2..90cb657178 100644
--- a/erts/preloaded/ebin/socket.beam
+++ b/erts/preloaded/ebin/socket.beam
diff --git a/erts/preloaded/src/socket.erl b/erts/preloaded/src/socket.erl
index fcc052a25d..68b7d3f4b0 100644
--- a/erts/preloaded/src/socket.erl
+++ b/erts/preloaded/src/socket.erl
@@ -629,11 +629,11 @@
 -define(SOCKET_OPT_IP_NODEFRAG,              17).
 %% -define(SOCKET_OPT_IP_OPTIONS,               18). % FreeBSD
 -define(SOCKET_OPT_IP_PKTINFO,               19).
--define(SOCKET_OPT_IP_RECVERR,               20).
--define(SOCKET_OPT_IP_RECVIF,                21).
-%% -define(SOCKET_OPT_IP_RECVDSTADDR,           22).
+-define(SOCKET_OPT_IP_RECVDSTADDR,           20). % FreeBSD
+-define(SOCKET_OPT_IP_RECVERR,               21).
+-define(SOCKET_OPT_IP_RECVIF,                22).
 -define(SOCKET_OPT_IP_RECVOPTS,              23).
-%% -define(SOCKET_OPT_IP_RECVORIGDSTADDR,       24).
+-define(SOCKET_OPT_IP_RECVORIGDSTADDR,       24).
 -define(SOCKET_OPT_IP_RECVTOS,               25).
 -define(SOCKET_OPT_IP_RECVTTL,               26).
 -define(SOCKET_OPT_IP_RETOPTS,               27).
@@ -2289,6 +2289,9 @@ enc_setopt_value(ip, nodefrag, V, _D, _T, _P)
 enc_setopt_value(ip, pktinfo, V, _D, _T, _P)
   when is_boolean(V) ->
     V;
+enc_setopt_value(ip, recvdstaddr, V, _D, _T, _P)
+  when is_boolean(V) ->
+    V;
 enc_setopt_value(ip, recverr, V, _D, _T, _P)
   when is_boolean(V) ->
     V;
@@ -2298,6 +2301,9 @@ enc_setopt_value(ip, recvif, V, _D, _T, _P)
 enc_setopt_value(ip, recvopts, V, _D, _T, _P)
   when is_boolean(V) ->
     V;
+enc_setopt_value(ip, recvorigdstaddr, V, _D, _T, _P)
+  when is_boolean(V) ->
+    V;
 enc_setopt_value(ip, recvtos, V, _D, _T, _P)
   when is_boolean(V) ->
     V;
@@ -2751,19 +2757,17 @@ enc_sockopt_key(ip = L, options = Opt, _Dir, _D, _T, _P) ->
     not_supported({Opt, L});
 enc_sockopt_key(ip = _L, pktinfo = _Opt, _Dir, _D, dgram = _T, _P) ->
     ?SOCKET_OPT_IP_PKTINFO;
-%% This require special code for accessing the errors.
-%% via calling the recvmsg with the MSG_ERRQUEUE flag set,
+enc_sockopt_key(ip = _L, recvdstaddr = _Opt, _Dir, _D, T, _P) when (T =:= dgram) ->
+    ?SOCKET_OPT_IP_RECVDSTADDR;
 enc_sockopt_key(ip = _L, recverr = _Opt, _Dir, _D, _T, _P) ->
     ?SOCKET_OPT_IP_RECVERR;
 enc_sockopt_key(ip = _L, recvif = _Opt, _Dir, _D, T, _P)
   when (T =:= dgram) orelse (T =:= raw) ->
     ?SOCKET_OPT_IP_RECVIF;
-enc_sockopt_key(ip = L, recvdstaddr = Opt, _Dir, _D, _T, _P) ->
-    not_supported({L, Opt});
 enc_sockopt_key(ip = _L, recvopts = _Opt, _Dir, _D, T, _P) when (T =/= stream) ->
     ?SOCKET_OPT_IP_RECVOPTS;
-enc_sockopt_key(ip = L, recvorigdstaddr = Opt, _Dir, _D, _T, _P) ->
-    not_supported({L, Opt});
+enc_sockopt_key(ip = _L, recvorigdstaddr = _Opt, _Dir, _D, _T, _P) ->
+    ?SOCKET_OPT_IP_RECVORIGDSTADDR;
 enc_sockopt_key(ip, recvtos = _Opt, _Dir, _D, _T, _P) ->
     ?SOCKET_OPT_IP_RECVTOS;
 enc_sockopt_key(ip = _L, recvttl = _Opt, _Dir, _D, T, _P) when (T =/= stream) ->