From b598160c2f1162658ea948284aee5b53951a3b9e Mon Sep 17 00:00:00 2001
From: Micael Karlberg <bmk@erlang.org>
Date: Tue, 24 Jul 2018 12:29:22 +0200
Subject: [socket-nif] Add support for socket (level ipv6) option unicast_hops

Added support for the IPv6 socket option UNICAST_HOPS.

OTP-14831.
---
 erts/emulator/nifs/common/socket_nif.c | 44 ++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

(limited to 'erts/emulator')

diff --git a/erts/emulator/nifs/common/socket_nif.c b/erts/emulator/nifs/common/socket_nif.c
index 6a2904f75f..5aba0bca03 100644
--- a/erts/emulator/nifs/common/socket_nif.c
+++ b/erts/emulator/nifs/common/socket_nif.c
@@ -549,6 +549,7 @@ typedef union {
 #define SOCKET_OPT_IPV6_MULTICAST_LOOP       21
 #define SOCKET_OPT_IPV6_RECVPKTINFO          25 // PKTINFO on FreeBSD
 #define SOCKET_OPT_IPV6_RTHDR                28
+#define SOCKET_OPT_IPV6_UNICAST_HOPS         30
 #define SOCKET_OPT_IPV6_V6ONLY               32
 
 #define SOCKET_OPT_TCP_CONGESTION   1
@@ -1270,6 +1271,11 @@ static ERL_NIF_TERM nsetopt_lvl_ipv6_rthdr(ErlNifEnv*        env,
                                            SocketDescriptor* descP,
                                            ERL_NIF_TERM      eVal);
 #endif
+#if defined(IPV6_UNICAST_HOPS)
+static ERL_NIF_TERM nsetopt_lvl_ipv6_unicast_hops(ErlNifEnv*        env,
+                                                  SocketDescriptor* descP,
+                                                  ERL_NIF_TERM      eVal);
+#endif
 #if defined(IPV6_V6ONLY)
 static ERL_NIF_TERM nsetopt_lvl_ipv6_v6only(ErlNifEnv*        env,
                                             SocketDescriptor* descP,
@@ -1595,6 +1601,10 @@ static ERL_NIF_TERM ngetopt_lvl_ipv6_recvpktinfo(ErlNifEnv*        env,
 static ERL_NIF_TERM ngetopt_lvl_ipv6_rthdr(ErlNifEnv*        env,
                                            SocketDescriptor* descP);
 #endif
+#if defined(IPV6_UNICAST_HOPS)
+static ERL_NIF_TERM ngetopt_lvl_ipv6_unicast_hops(ErlNifEnv*        env,
+                                                  SocketDescriptor* descP);
+#endif
 #if defined(IPV6_V6ONLY)
 static ERL_NIF_TERM ngetopt_lvl_ipv6_v6only(ErlNifEnv*        env,
                                             SocketDescriptor* descP);
@@ -5667,6 +5677,12 @@ ERL_NIF_TERM nsetopt_lvl_ipv6(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(IPV6_UNICAST_HOPS)
+    case SOCKET_OPT_IPV6_UNICAST_HOPS:
+        result = nsetopt_lvl_ipv6_unicast_hops(env, descP, eVal);
+        break;
+#endif
+
 #if defined(IPV6_V6ONLY)
     case SOCKET_OPT_IPV6_V6ONLY:
         result = nsetopt_lvl_ipv6_v6only(env, descP, eVal);
@@ -5878,6 +5894,18 @@ ERL_NIF_TERM nsetopt_lvl_ipv6_rthdr(ErlNifEnv*        env,
 #endif
 
 
+#if defined(IPV6_UNICAST_HOPS)
+static
+ERL_NIF_TERM nsetopt_lvl_ipv6_unicast_hops(ErlNifEnv*        env,
+                                           SocketDescriptor* descP,
+                                           ERL_NIF_TERM      eVal)
+{
+    return nsetopt_int_opt(env, descP, SOL_IPV6, IPV6_UNICAST_HOPS, eVal);
+}
+#endif
+
+
+
 #if defined(IPV6_V6ONLY)
 static
 ERL_NIF_TERM nsetopt_lvl_ipv6_v6only(ErlNifEnv*        env,
@@ -8277,6 +8305,12 @@ ERL_NIF_TERM ngetopt_lvl_ipv6(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(IPV6_UNICAST_HOPS)
+    case SOCKET_OPT_IPV6_UNICAST_HOPS:
+        result = ngetopt_lvl_ipv6_unicast_hops(env, descP);
+        break;
+#endif
+
 #if defined(IPV6_V6ONLY)
     case SOCKET_OPT_IPV6_V6ONLY:
         result = ngetopt_lvl_ipv6_v6only(env, descP);
@@ -8442,6 +8476,16 @@ ERL_NIF_TERM ngetopt_lvl_ipv6_rthdr(ErlNifEnv*        env,
 #endif
 
 
+#if defined(IPV6_UNICAST_HOPS)
+static
+ERL_NIF_TERM ngetopt_lvl_ipv6_unicast_hops(ErlNifEnv*        env,
+                                             SocketDescriptor* descP)
+{
+    return ngetopt_int_opt(env, descP, SOL_IPV6, IPV6_UNICAST_HOPS);
+}
+#endif
+
+
 #if defined(IPV6_V6ONLY)
 static
 ERL_NIF_TERM ngetopt_lvl_ipv6_v6only(ErlNifEnv*        env,
-- 
cgit v1.2.3