From 08ce39bbc2cd3006475c87807042c2d08a68736f Mon Sep 17 00:00:00 2001
From: Micael Karlberg <bmk@erlang.org>
Date: Thu, 19 Jul 2018 17:54:14 +0200
Subject: [socket-nif] Add support for socket (level sctp) option maxseg

Added support for the SCTP option MAXSEG.

OTP-14831
---
 erts/emulator/nifs/common/socket_nif.c | 47 ++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'erts/emulator')

diff --git a/erts/emulator/nifs/common/socket_nif.c b/erts/emulator/nifs/common/socket_nif.c
index f9643cccbf..e84eb7aa8e 100644
--- a/erts/emulator/nifs/common/socket_nif.c
+++ b/erts/emulator/nifs/common/socket_nif.c
@@ -546,6 +546,7 @@ typedef union {
 #define SOCKET_OPT_SCTP_AUTOCLOSE           8
 #define SOCKET_OPT_SCTP_DISABLE_FRAGMENTS  12
 #define SOCKET_OPT_SCTP_EVENTS             14
+#define SOCKET_OPT_SCTP_MAXSEG             21
 #define SOCKET_OPT_SCTP_NODELAY            23
 #define SOCKET_OPT_SCTP_RTOINFO            29
 
@@ -1234,6 +1235,11 @@ static ERL_NIF_TERM nsetopt_lvl_sctp_events(ErlNifEnv*        env,
                                             SocketDescriptor* descP,
                                             ERL_NIF_TERM      eVal);
 #endif
+#if defined(SCTP_MAXSEG)
+static ERL_NIF_TERM nsetopt_lvl_sctp_maxseg(ErlNifEnv*        env,
+                                            SocketDescriptor* descP,
+                                            ERL_NIF_TERM      eVal);
+#endif
 #if defined(SCTP_NODELAY)
 static ERL_NIF_TERM nsetopt_lvl_sctp_nodelay(ErlNifEnv*        env,
                                              SocketDescriptor* descP,
@@ -1459,6 +1465,10 @@ static ERL_NIF_TERM ngetopt_lvl_sctp_autoclose(ErlNifEnv*        env,
 static ERL_NIF_TERM ngetopt_lvl_sctp_disable_fragments(ErlNifEnv*        env,
                                                        SocketDescriptor* descP);
 #endif
+#if defined(SCTP_MAXSEG)
+static ERL_NIF_TERM ngetopt_lvl_sctp_maxseg(ErlNifEnv*        env,
+                                            SocketDescriptor* descP);
+#endif
 #if defined(SCTP_NODELAY)
 static ERL_NIF_TERM ngetopt_lvl_sctp_nodelay(ErlNifEnv*        env,
                                              SocketDescriptor* descP);
@@ -5575,6 +5585,12 @@ ERL_NIF_TERM nsetopt_lvl_sctp(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(SCTP_MAXSEG)
+    case SOCKET_OPT_SCTP_MAXSEG:
+        result = nsetopt_lvl_sctp_maxseg(env, descP, eVal);
+        break;
+#endif
+
 #if defined(SCTP_NODELAY)
     case SOCKET_OPT_SCTP_NODELAY:
         result = nsetopt_lvl_sctp_nodelay(env, descP, eVal);
@@ -5822,6 +5838,19 @@ ERL_NIF_TERM nsetopt_lvl_sctp_events(ErlNifEnv*        env,
 #endif
 
 
+/* nsetopt_lvl_sctp_maxseg - Level SCTP MAXSEG option
+ */
+#if defined(SCTP_MAXSEG)
+static
+ERL_NIF_TERM nsetopt_lvl_sctp_maxseg(ErlNifEnv*        env,
+                                     SocketDescriptor* descP,
+                                     ERL_NIF_TERM      eVal)
+{
+    return nsetopt_int_opt(env, descP, IPPROTO_SCTP, SCTP_MAXSEG, eVal);
+}
+#endif
+
+
 /* nsetopt_lvl_sctp_nodelay - Level SCTP NODELAY option
  */
 #if defined(SCTP_NODELAY)
@@ -7585,6 +7614,12 @@ ERL_NIF_TERM ngetopt_lvl_sctp(ErlNifEnv*        env,
         break;
 #endif
 
+#if defined(SCTP_MAXSEG)
+    case SOCKET_OPT_SCTP_MAXSEG:
+        result = ngetopt_lvl_sctp_maxseg(env, descP);
+        break;
+#endif
+
 #if defined(SCTP_NODELAY)
     case SOCKET_OPT_SCTP_NODELAY:
         result = ngetopt_lvl_sctp_nodelay(env, descP);
@@ -7697,6 +7732,18 @@ ERL_NIF_TERM ngetopt_lvl_sctp_disable_fragments(ErlNifEnv*        env,
 #endif
 
 
+/* ngetopt_lvl_sctp_maxseg - Level SCTP MAXSEG option
+ */
+#if defined(SCTP_MAXSEG)
+static
+ERL_NIF_TERM ngetopt_lvl_sctp_maxseg(ErlNifEnv*        env,
+                                     SocketDescriptor* descP)
+{
+    return ngetopt_int_opt(env, descP, IPPROTO_SCTP, SCTP_MAXSEG);
+}
+#endif
+
+
 /* ngetopt_lvl_sctp_nodelay - Level SCTP NODELAY option
  */
 #if defined(SCTP_NODELAY)
-- 
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