[PATCH] centos 6 compatibility

[namiltd at poczta.onet.pl]

---
 src/crypto/zinc/blake2s/blake2s.c | 17 +++++++++++++++++
 src/socket.c                      |  7 +++++++
 2 files changed, 24 insertions(+)

diff --git a/src/crypto/zinc/blake2s/blake2s.c b/src/crypto/zinc/blake2s/blake2s.c
index b881db0..60b7763 100644
--- a/src/crypto/zinc/blake2s/blake2s.c
+++ b/src/crypto/zinc/blake2s/blake2s.c
@@ -19,9 +19,16 @@
 #include <linux/init.h>
 #include <linux/bug.h>
 #include <asm/unaligned.h>
+#define GCC_VERSION (__GNUC__ * 10000 \
+		    + __GNUC_MINOR__ * 100 \
+		    + __GNUC_PATCHLEVEL__)
 
+#if GCC_VERSION > 40407
 typedef union {
 	struct {
+#else
+typedef struct {
+#endif
 		u8 digest_length;
 		u8 key_length;
 		u8 fanout;
@@ -33,8 +40,10 @@ typedef union {
 		u8 inner_length;
 		u8 salt[8];
 		u8 personal[8];
+#if GCC_VERSION > 40407
 	};
 	__le32 words[8];
+#endif
 } __packed blake2s_param;
 
 static const u32 blake2s_iv[8] = {
@@ -74,9 +83,17 @@ static inline void blake2s_init_param(struct blake2s_state *state,
 {
 	int i;
 
+#if GCC_VERSION <= 40407
+	const __le32 *words;
+	words = (const __le32 *)param;
+#endif
 	memset(state, 0, sizeof(*state));
 	for (i = 0; i < 8; ++i)
+#if GCC_VERSION > 40407
 		state->h[i] = blake2s_iv[i] ^ le32_to_cpu(param->words[i]);
+#else
+		state->h[i] = blake2s_iv[i] ^ le32_to_cpu(words[i]);
+#endif
 }
 
 void blake2s_init(struct blake2s_state *state, const size_t outlen)
diff --git a/src/socket.c b/src/socket.c
index 652d798..dfc98d3 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -16,6 +16,9 @@
 #include <linux/inetdevice.h>
 #include <net/udp_tunnel.h>
 #include <net/ipv6.h>
+#define GCC_VERSION (__GNUC__ * 10000 \
+		    + __GNUC_MINOR__ * 100 \
+		    + __GNUC_PATCHLEVEL__)
 
 static int send4(struct wg_device *wg, struct sk_buff *skb,
 		 struct endpoint *endpoint, u8 ds, struct dst_cache *cache)
@@ -363,7 +366,9 @@ int wg_socket_init(struct wg_device *wg, u16 port)
 	struct socket *new4 = NULL, *new6 = NULL;
 	struct udp_port_cfg port4 = {
 		.family = AF_INET,
+#if GCC_VERSION > 40407
 		.local_ip.s_addr = htonl(INADDR_ANY),
+#endif
 		.local_udp_port = htons(port),
 		.use_udp_checksums = true
 	};
@@ -371,7 +376,9 @@ int wg_socket_init(struct wg_device *wg, u16 port)
 	int retries = 0;
 	struct udp_port_cfg port6 = {
 		.family = AF_INET6,
+#if GCC_VERSION > 40407
 		.local_ip6 = IN6ADDR_ANY_INIT,
+#endif
 		.use_udp6_tx_checksums = true,
 		.use_udp6_rx_checksums = true,
 		.ipv6_v6only = true
-- 
2.18.0.windows.1