From 0b2361a9399944cd57def87226f2be7f92646aa5 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@tinc-vpn.org>
Date: Sat, 16 Dec 2017 22:54:31 +0100
Subject: [PATCH] Assume all IPPROTO_* macros exist.

---
 src/net_packet.c |  4 ++--
 src/net_setup.c  |  4 ++--
 src/net_socket.c | 22 ++++++++++++----------
 3 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/src/net_packet.c b/src/net_packet.c
index 1aa881ce..ce2361cb 100644
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -773,7 +773,7 @@ static void send_udppacket(node_t *n, vpn_packet_t *origpkt) {
 		listen_socket[sock].priority = origpriority;
 
 		switch(sa->sa.sa_family) {
-#if defined(IPPROTO_IP) && defined(IP_TOS)
+#if defined(IP_TOS)
 
 		case AF_INET:
 			logger(DEBUG_TRAFFIC, LOG_DEBUG, "Setting IPv4 outgoing packet priority to %d", origpriority);
@@ -784,7 +784,7 @@ static void send_udppacket(node_t *n, vpn_packet_t *origpkt) {
 
 			break;
 #endif
-#if defined(IPPROTO_IPV6) & defined(IPV6_TCLASS)
+#if defined(IPV6_TCLASS)
 
 		case AF_INET6:
 			logger(DEBUG_TRAFFIC, LOG_DEBUG, "Setting IPv6 outgoing packet priority to %d", origpriority);
diff --git a/src/net_setup.c b/src/net_setup.c
index ad9398db..4f9d738f 100644
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -637,7 +637,7 @@ bool setup_myself_reloadable(void) {
 		subnet_add(NULL, s);
 	}
 
-#if !defined(IPPROTO_IP) || !defined(IP_TOS)
+#if !defined(IP_TOS)
 
 	if(priorityinheritance) {
 		logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform for IPv4 connections", "PriorityInheritance");
@@ -645,7 +645,7 @@ bool setup_myself_reloadable(void) {
 
 #endif
 
-#if !defined(IPPROTO_IPV6) || !defined(IPV6_TCLASS)
+#if !defined(IPV6_TCLASS)
 
 	if(priorityinheritance) {
 		logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform for IPv6 connections", "PriorityInheritance");
diff --git a/src/net_socket.c b/src/net_socket.c
index 43ea4f8d..979e84b9 100644
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@ -70,17 +70,17 @@ static void configure_tcp(connection_t *c) {
 
 #endif
 
-#if defined(IPPROTO_TCP) && defined(TCP_NODELAY)
+#if defined(TCP_NODELAY)
 	option = 1;
 	setsockopt(c->socket, IPPROTO_TCP, TCP_NODELAY, (void *)&option, sizeof(option));
 #endif
 
-#if defined(IPPROTO_IP) && defined(IP_TOS) && defined(IPTOS_LOWDELAY)
+#if defined(IP_TOS) && defined(IPTOS_LOWDELAY)
 	option = IPTOS_LOWDELAY;
 	setsockopt(c->socket, IPPROTO_IP, IP_TOS, (void *)&option, sizeof(option));
 #endif
 
-#if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS) && defined(IPTOS_LOWDELAY)
+#if defined(IPV6_TCLASS) && defined(IPTOS_LOWDELAY)
 	option = IPTOS_LOWDELAY;
 	setsockopt(c->socket, IPPROTO_IPV6, IPV6_TCLASS, (void *)&option, sizeof(option));
 #endif
@@ -175,12 +175,14 @@ int setup_listen_socket(const sockaddr_t *sa) {
 	option = 1;
 	setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
 
-#if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
+#if defined(IPV6_V6ONLY)
 
 	if(sa->sa.sa_family == AF_INET6) {
 		setsockopt(nfd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&option, sizeof(option));
 	}
 
+#else
+#warning IPV6_V6ONLY not defined
 #endif
 
 	if(get_config_string
@@ -271,7 +273,7 @@ int setup_vpn_in_socket(const sockaddr_t *sa) {
 		logger(DEBUG_ALWAYS, LOG_WARNING, "Can't set UDP SO_SNDBUF to %i: %s", udp_sndbuf, sockstrerror(sockerrno));
 	}
 
-#if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
+#if defined(IPV6_V6ONLY)
 
 	if(sa->sa.sa_family == AF_INET6) {
 		setsockopt(nfd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&option, sizeof(option));
@@ -283,14 +285,14 @@ int setup_vpn_in_socket(const sockaddr_t *sa) {
 #define IP_DONTFRAGMENT IP_DONTFRAG
 #endif
 
-#if defined(IPPROTO_IP) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
+#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
 
 	if(myself->options & OPTION_PMTU_DISCOVERY) {
 		option = IP_PMTUDISC_DO;
 		setsockopt(nfd, IPPROTO_IP, IP_MTU_DISCOVER, (void *)&option, sizeof(option));
 	}
 
-#elif defined(IPPROTO_IP) && defined(IP_DONTFRAGMENT)
+#elif defined(IP_DONTFRAGMENT)
 
 	if(myself->options & OPTION_PMTU_DISCOVERY) {
 		option = 1;
@@ -299,14 +301,14 @@ int setup_vpn_in_socket(const sockaddr_t *sa) {
 
 #endif
 
-#if defined(IPPROTO_IPV6) && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
+#if defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
 
 	if(myself->options & OPTION_PMTU_DISCOVERY) {
 		option = IPV6_PMTUDISC_DO;
 		setsockopt(nfd, IPPROTO_IPV6, IPV6_MTU_DISCOVER, (void *)&option, sizeof(option));
 	}
 
-#elif defined(IPPROTO_IPV6) && defined(IPV6_DONTFRAG)
+#elif defined(IPV6_DONTFRAG)
 
 	if(myself->options & OPTION_PMTU_DISCOVERY) {
 		option = 1;
@@ -586,7 +588,7 @@ begin:
 #endif
 
 	if(proxytype != PROXY_EXEC) {
-#if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
+#if defined(IPV6_V6ONLY)
 		int option = 1;
 
 		if(c->address.sa.sa_family == AF_INET6) {
-- 
2.20.1