From 95f09569beb2e304e6a2112d20cee6fab88f3729 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@tinc-vpn.org>
Date: Sat, 8 Apr 2017 13:34:40 +0200
Subject: [PATCH] Use getmsg()/putmsg() instead of read()/write() on Solaris.

This fixes a problem where read() returns packets from the IP layer before
fragmentation is done.

# Conflicts:
#	src/solaris/device.c
---
 src/solaris/device.c | 37 +++++++++++++++++++++++++++----------
 1 file changed, 27 insertions(+), 10 deletions(-)

diff --git a/src/solaris/device.c b/src/solaris/device.c
index 53d3d63c..89481c7b 100644
--- a/src/solaris/device.c
+++ b/src/solaris/device.c
@@ -24,6 +24,7 @@
 
 #include <sys/stropts.h>
 #include <sys/sockio.h>
+#include <stropts.h>
 
 #include "../conf.h"
 #include "../device.h"
@@ -296,11 +297,16 @@ static void close_device(void) {
 }
 
 static bool read_packet(vpn_packet_t *packet) {
-	int inlen;
+	int result;
+	struct strbuf sbuf;
+	int f = 0;
 
 	switch(device_type) {
 		case DEVICE_TYPE_TUN:
-			if((inlen = read(device_fd, DATA(packet) + 14, MTU - 14)) <= 0) {
+			sbuf.maxlen = MTU - 14;
+			sbuf.buf = (char *)DATA(packet) + 14;
+
+			if((result = getmsg(device_fd, NULL, &sbuf, &f)) < 0) {
 				logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno));
 				return false;
 			}
@@ -320,16 +326,19 @@ static bool read_packet(vpn_packet_t *packet) {
 			}
 
 			memset(DATA(packet), 0, 12);
-			packet->len = inlen + 14;
+			packet->len = sbuf.len + 14;
 			break;
 
 		case DEVICE_TYPE_TAP:
-			if((inlen = read(device_fd, DATA(packet), MTU)) <= 0) {
-				logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno));
+			sbuf.maxlen = MTU;
+			sbuf.buf = (char *)DATA(packet);
+
+			if((result = getmsg(device_fd, NULL, &sbuf, &f)) < 0) {
+				logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno));
 				return false;
 			}
 
-			packet->len = inlen + 14;
+			packet->len = sbuf.len;
 			break;
 
 		default:
@@ -344,17 +353,25 @@ static bool read_packet(vpn_packet_t *packet) {
 static bool write_packet(vpn_packet_t *packet) {
 	logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s", packet->len, device_info);
 
+	struct strbuf sbuf;
+
 	switch(device_type) {
 		case DEVICE_TYPE_TUN:
-			if(write(device_fd, DATA(packet) + 14, packet->len - 14) < 0) {
-				logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno));
+			sbuf.len = packet->len - 14;
+			sbuf.buf = (char *)DATA(packet) + 14;
+
+			if(putmsg(device_fd, NULL, &sbuf, 0) < 0) {
+				logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno));
 				return false;
 			}
 			break;
 
 		case DEVICE_TYPE_TAP:
-			if(write(device_fd, DATA(packet), packet->len) < 0) {
-				logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno));
+			sbuf.len = packet->len;
+			sbuf.buf = (char *)DATA(packet);
+
+			if(putmsg(device_fd, NULL, &sbuf, 0) < 0) {
+				logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno));
 				return false;
 			}
 			break;