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smpp: set TCP_NODELAY sockopt

Change-Id: Ibfaaeaa6e21f621eb32b37b783e286e40859c915
Fixes: OS#5568
---
M src/libsmpputil/smpp_smsc.c
M src/utils/smpp_mirror.c
2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/libsmpputil/smpp_smsc.c b/src/libsmpputil/smpp_smsc.c
index 34e24c5..786efa1 100644
--- a/src/libsmpputil/smpp_smsc.c
+++ b/src/libsmpputil/smpp_smsc.c
@@ -27,6 +27,7 @@
 
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <netinet/tcp.h>
 
 #include <smpp34.h>
 #include <smpp34_structs.h>
@@ -984,7 +985,7 @@
  */
 int smpp_smsc_start(struct smsc *smsc, const char *bind_addr, uint16_t port)
 {
-	int rc;
+	int rc, val;
 
 	LOGP(DSMPP, LOGL_NOTICE, "SMPP at %s %d\n",
 	     bind_addr ? bind_addr : "0.0.0.0", port ? port : SMPP_PORT);
@@ -995,6 +996,11 @@
 	if (rc < 0)
 		return rc;
 
+	val = 1;
+	rc = setsockopt(smsc->listen_ofd.fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
+	if (rc < 0)
+		LOGP(DSMPP, LOGL_ERROR, "Failed to set TCP_NODELAY: %s\n", strerror(errno));
+
 	/* store new address and port */
 	rc = smpp_smsc_conf(smsc, bind_addr, port ? port : SMPP_PORT);
 	if (rc)
diff --git a/src/utils/smpp_mirror.c b/src/utils/smpp_mirror.c
index 340e94f..5df09e4 100644
--- a/src/utils/smpp_mirror.c
+++ b/src/utils/smpp_mirror.c
@@ -5,6 +5,7 @@
 #include <string.h>
 
 #include <netinet/in.h>
+#include <netinet/tcp.h>
 
 #include <smpp34.h>
 #include <smpp34_structs.h>
@@ -241,7 +242,7 @@
 
 static int smpp_esme_init(struct esme *esme, const char *host, uint16_t port)
 {
-	int rc;
+	int rc, val;
 
 	if (port == 0)
 		port = SMPP_PORT;
@@ -255,6 +256,11 @@
 	if (rc < 0)
 		return rc;
 
+	val = 1;
+	rc = setsockopt(esme->wqueue.bfd.fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
+	if (rc < 0)
+		LOGP(DSMPP, LOGL_ERROR, "Failed to set TCP_NODELAY: %s\n", strerror(errno));
+
 	return bind_transceiver(esme);
 }
 

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