From 673367a0c17349a8b57dfad5dbc349c68417c6a5 Mon Sep 17 00:00:00 2001
From: Micael Karlberg <bmk@erlang.org>
Date: Wed, 25 Jul 2018 13:07:34 +0200
Subject: [socket-nif] Add support for socket (level ip) option transparent

Added support for ip level socket option TRANSPARENT.

OTP-14831
---
 erts/emulator/nifs/common/socket_nif.c | 67 ++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)

(limited to 'erts/emulator')

diff --git a/erts/emulator/nifs/common/socket_nif.c b/erts/emulator/nifs/common/socket_nif.c
index f4da7cdbb0..9e9ac333e7 100644
--- a/erts/emulator/nifs/common/socket_nif.c
+++ b/erts/emulator/nifs/common/socket_nif.c
@@ -538,6 +538,7 @@ typedef union {
 #define SOCKET_OPT_IP_RECVTTL                26
 #define SOCKET_OPT_IP_ROUTER_ALERT           28
 #define SOCKET_OPT_IP_TOS                    30
+#define SOCKET_OPT_IP_TRANSPARENT            31
 #define SOCKET_OPT_IP_TTL                    32
 #define SOCKET_OPT_IP_UNBLOCK_SOURCE         33
 
@@ -1204,6 +1205,11 @@ static ERL_NIF_TERM nsetopt_lvl_ip_tos(ErlNifEnv*        env,
                                        SocketDescriptor* descP,
                                        ERL_NIF_TERM      eVal);
 #endif
+#if defined(IP_TRANSPARENT)
+static ERL_NIF_TERM nsetopt_lvl_ip_transparent(ErlNifEnv*        env,
+                                               SocketDescriptor* descP,
+                                               ERL_NIF_TERM      eVal);
+#endif
 #if defined(IP_TTL)
 static ERL_NIF_TERM nsetopt_lvl_ip_ttl(ErlNifEnv*        env,
                                        SocketDescriptor* descP,
@@ -1608,6 +1614,10 @@ static ERL_NIF_TERM ngetopt_lvl_ip_router_alert(ErlNifEnv*        env,
 static ERL_NIF_TERM ngetopt_lvl_ip_tos(ErlNifEnv*        env,
                                        SocketDescriptor* descP);
 #endif
+#if defined(IP_TRANSPARENT)
+static ERL_NIF_TERM ngetopt_lvl_ip_transparent(ErlNifEnv*        env,
+                                               SocketDescriptor* descP);
+#endif
 #if defined(IP_TTL)
 static ERL_NIF_TERM ngetopt_lvl_ip_ttl(ErlNifEnv*        env,
                                        SocketDescriptor* descP);
@@ -5073,6 +5083,12 @@ ERL_NIF_TERM nsetopt_lvl_ip(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(IP_TRANSPARENT)
+    case SOCKET_OPT_IP_TRANSPARENT:
+        result = nsetopt_lvl_ip_transparent(env, descP, eVal);
+        break;
+#endif
+
 #if defined(IP_TTL)
     case SOCKET_OPT_IP_TTL:
         result = nsetopt_lvl_ip_ttl(env, descP, eVal);
@@ -5086,10 +5102,16 @@ ERL_NIF_TERM nsetopt_lvl_ip(ErlNifEnv*        env,
 #endif
 
     default:
+        SSDBG( descP, ("SOCKET", "nsetopt_lvl_ip -> unknown opt (%d)\r\n", eOpt) );
         result = esock_make_error(env, esock_atom_einval);
         break;
     }
 
+    SSDBG( descP,
+           ("SOCKET", "nsetopt_lvl_ip -> done when"
+            "\r\n   result: %T"
+            "\r\n", result) );
+
     return result;
 }
 
@@ -5714,6 +5736,26 @@ ERL_NIF_TERM nsetopt_lvl_ip_tos(ErlNifEnv*        env,
 #endif
 
 
+/* nsetopt_lvl_ip_transparent - Level IP TRANSPARENT option
+ */
+#if defined(IP_TRANSPARENT)
+static
+ERL_NIF_TERM nsetopt_lvl_ip_transparent(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_TRANSPARENT, eVal);
+}
+#endif
+
+
+
 /* nsetopt_lvl_ip_ttl - Level IP TTL option
  */
 #if defined(IP_TTL)
@@ -8259,6 +8301,12 @@ ERL_NIF_TERM ngetopt_lvl_ip(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(IP_TRANSPARENT)
+    case SOCKET_OPT_IP_TRANSPARENT:
+        result = ngetopt_lvl_ip_transparent(env, descP);
+        break;
+#endif
+
 #if defined(IP_TTL)
     case SOCKET_OPT_IP_TTL:
         result = ngetopt_lvl_ip_ttl(env, descP);
@@ -8651,6 +8699,25 @@ ERL_NIF_TERM ngetopt_lvl_ip_tos(ErlNifEnv*        env,
 #endif
 
 
+/* ngetopt_lvl_ip_transparent - Level IP TRANSPARENT option
+ */
+#if defined(IP_TRANSPARENT)
+static
+ERL_NIF_TERM ngetopt_lvl_ip_transparent(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_TRANSPARENT);
+}
+#endif
+
+
+
 /* ngetopt_lvl_ip_ttl - Level IP TTL option
  */
 #if defined(IP_TTL)
-- 
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