MinGW Support (32bit & 64bit) (#321)

* Added support for mingw64 (gcc 6.3.0)

* Fixed mingw32/64 issue

* be more verbose (#312)

* Improve and of ICMP messages on Windows.

When an ICMP message is received on Windows 10 for a UDP socket,
WSAECONNRESET is reported as an error. In this case, just read
again.

Thanks to nxrighthere for reporting the issue and helping to
nail it down.

This fixes #309.

* Fix broken links, Make URLs' protocols consistent (#315)

Two Links missed leading `http(s)://` and were broken.
All links to `tools.ietf.org` now consistently use https.

* Backport https://svnweb.freebsd.org/base?view=revision&revision=340783

* Improve input validation for the IPPROTO_SCTP level socket options
SCTP_CONNECT_X and SCTP_CONNECT_X_DELAYED.

* Allow sending on demand SCTP HEARTBEATS only in the ESTABLISHED state.

* Fix cross-build linux->mingw (#320)

* Fix compile error due to merge mistake.

* test commit

* Add MinGW and MinGW64 support

* MinGW support, polishing

* Sanitize non C-style comments

* Revert uint32_t casting for htonl

* Ignore wformat errors on GCC + MinGW platforms

22 files changed, 89 insertions, 63 deletions

diff --git a/programs/CMakeLists.txt b/programs/CMakeLists.txt
index d383c3f1..8cdff313 100644
--- a/programs/CMakeLists.txt
+++ b/programs/CMakeLists.txt
@@ -56,6 +56,17 @@ if (CMAKE_SYSTEM_NAME MATCHES "Darwin")
 	add_definitions(-D__APPLE_USE_RFC_2292)
 endif ()
 
+if (MSYS)
+	message(STATUS "MSYS")
+	add_definitions(-D__USE_MINGW_ANSI_STDIO)
+
+	if (CMAKE_C_COMPILER_ID MATCHES "GNU")
+		message(STATUS "MYSYS + GCC")
+		set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wno-format")
+		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-format")
+	endif ()
+endif ()
+
 
 #################################################
 # MISC
diff --git a/programs/client_upcall.c b/programs/client_upcall.c
index d77b4af8..3de0783c 100644
--- a/programs/client_upcall.c
+++ b/programs/client_upcall.c
@@ -40,7 +40,7 @@
 #if !defined(_WIN32)
 #include <unistd.h>
 #include <sys/time.h>
-#endif // !defined(_WIN32)
+#endif /* !defined(_WIN32) */
 
 #include <sys/types.h>
 
@@ -48,7 +48,7 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
-#else // !defined(_WIN32)
+#else /* !defined(_WIN32) */
 #include <io.h>
 #endif
 
@@ -66,17 +66,17 @@ typedef char* caddr_t;
 
 int inputAvailable(void)
 {
-  struct timeval tv;
-  fd_set fds;
-  tv.tv_sec = 0;
-  tv.tv_usec = 0;
-  FD_ZERO(&fds);
-#ifndef _WIN32
-  FD_SET(STDIN_FILENO, &fds);
-  select(STDIN_FILENO+1, &fds, NULL, NULL, &tv);
+	struct timeval tv;
+	fd_set fds;
+	tv.tv_sec = 0;
+	tv.tv_usec = 0;
+	FD_ZERO(&fds);
+#if defined(_WIN32) && !defined(__MINGW32__)
+	FD_SET(_fileno(stdin), &fds);
+  	select(_fileno(stdin) + 1, &fds, NULL, NULL, &tv);
 #else
-  FD_SET(_fileno(stdin), &fds);
-  select(_fileno(stdin) + 1, &fds, NULL, NULL, &tv);
+	FD_SET(STDIN_FILENO, &fds);
+	select(STDIN_FILENO+1, &fds, NULL, NULL, &tv);
 #endif
   return (FD_ISSET(0, &fds));
 }
diff --git a/programs/ekr_loop.c b/programs/ekr_loop.c
index 2d513cb2..5988450b 100644
--- a/programs/ekr_loop.c
+++ b/programs/ekr_loop.c
@@ -82,7 +82,7 @@ handle_packets(void *arg)
 		length = recv(*fdp, buf, MAX_PACKET_SIZE, 0);
 		if (length > 0) {
 			if ((dump_buf = usrsctp_dumppacket(buf, (size_t)length, SCTP_DUMP_INBOUND)) != NULL) {
-				//fprintf(stderr, "%s", dump_buf);
+				/* fprintf(stderr, "%s", dump_buf); */
 				usrsctp_freedumpbuffer(dump_buf);
 			}
 			usrsctp_conninput(fdp, buf, (size_t)length, 0);
@@ -111,7 +111,7 @@ conn_output(void *addr, void *buf, size_t length, uint8_t tos, uint8_t set_df)
 	fdp = (int *)addr;
 #endif
 	if ((dump_buf = usrsctp_dumppacket(buf, length, SCTP_DUMP_OUTBOUND)) != NULL) {
-		//fprintf(stderr, "%s", dump_buf);
+		/* fprintf(stderr, "%s", dump_buf); */
 		usrsctp_freedumpbuffer(dump_buf);
 	}
 #ifdef _WIN32
@@ -476,7 +476,7 @@ main(void)
 	}
 	memset(line, 'A', LINE_LENGTH);
 	sndinfo.snd_sid = 1;
-	sndinfo.snd_flags = 0; //SCTP_UNORDERED;
+	sndinfo.snd_flags = 0; /* SCTP_UNORDERED */
 	sndinfo.snd_ppid = htonl(DISCARD_PPID);
 	sndinfo.snd_context = 0;
 	sndinfo.snd_assoc_id = 0;
diff --git a/programs/ekr_loop_offload.c b/programs/ekr_loop_offload.c
index 1d39962d..a0308c5c 100644
--- a/programs/ekr_loop_offload.c
+++ b/programs/ekr_loop_offload.c
@@ -84,7 +84,7 @@ handle_packets(void *arg)
 		length = recv(*fdp, buffer, MAX_PACKET_SIZE, 0);
 		if (length > 0) {
 			if ((dump_buffer = usrsctp_dumppacket(buffer, (size_t)length, SCTP_DUMP_INBOUND)) != NULL) {
-				//fprintf(stderr, "%s", dump_buffer);
+				/* fprintf(stderr, "%s", dump_buffer); */
 				usrsctp_freedumpbuffer(dump_buffer);
 			}
 			if ((size_t)length >= sizeof(struct sctp_common_header)) {
@@ -132,7 +132,7 @@ conn_output(void *addr, void *buffer, size_t length, uint8_t tos, uint8_t set_df
 		hdr->crc32c = usrsctp_crc32c(buffer, (size_t)length);
 	}
 	if ((dump_buffer = usrsctp_dumppacket(buffer, length, SCTP_DUMP_OUTBOUND)) != NULL) {
-		//fprintf(stderr, "%s", dump_buffer);
+		/* fprintf(stderr, "%s", dump_buffer); */
 		usrsctp_freedumpbuffer(dump_buffer);
 	}
 #ifdef _WIN32
diff --git a/programs/ekr_loop_upcall.c b/programs/ekr_loop_upcall.c
index 7b384916..c5af5f3b 100644
--- a/programs/ekr_loop_upcall.c
+++ b/programs/ekr_loop_upcall.c
@@ -54,7 +54,7 @@
 #define MAX_PACKET_SIZE (1<<16)
 #define LINE_LENGTH (1<<20)
 #define DISCARD_PPID 39
-//#define DUMP_PKTS_TO_FILE
+/* #define DUMP_PKTS_TO_FILE */
 
 #ifdef _WIN32
 static DWORD WINAPI
@@ -84,7 +84,7 @@ handle_packets(void *arg)
 		length = recv(*fdp, buf, MAX_PACKET_SIZE, 0);
 		if (length > 0) {
 			if ((dump_buf = usrsctp_dumppacket(buf, (size_t)length, SCTP_DUMP_INBOUND)) != NULL) {
-				//fprintf(stderr, "%s", dump_buf);
+				/* fprintf(stderr, "%s", dump_buf); */
 				usrsctp_freedumpbuffer(dump_buf);
 			}
 			usrsctp_conninput(fdp, buf, (size_t)length, 0);
@@ -113,7 +113,7 @@ conn_output(void *addr, void *buf, size_t length, uint8_t tos, uint8_t set_df)
 	fdp = (int *)addr;
 #endif
 	if ((dump_buf = usrsctp_dumppacket(buf, length, SCTP_DUMP_OUTBOUND)) != NULL) {
-		//fprintf(stderr, "%s", dump_buf);
+		/* fprintf(stderr, "%s", dump_buf); */
 		usrsctp_freedumpbuffer(dump_buf);
 	}
 
@@ -150,7 +150,6 @@ handle_upcall(struct socket *sock, void *data, int flgs)
 	while ((events = usrsctp_get_events(sock)) && (events & SCTP_EVENT_READ)) {
 		struct sctp_recvv_rn rn;
 		ssize_t n;
-		//struct sockaddr_storage addr;
 		union sctp_sockstore addr;
 		int flags = 0;
 		socklen_t len = (socklen_t)sizeof(addr);
diff --git a/programs/ekr_peer.c b/programs/ekr_peer.c
index 26fca115..d51568c7 100644
--- a/programs/ekr_peer.c
+++ b/programs/ekr_peer.c
@@ -283,7 +283,7 @@ main(int argc, char *argv[])
 		perror("usrsctp_connect");
 	}
 	for (;;) {
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(__MINGW32__)
 		if (gets_s(line, LINE_LENGTH) == NULL) {
 #else
 		if (fgets(line, LINE_LENGTH, stdin) == NULL) {
diff --git a/programs/http_client_upcall.c b/programs/http_client_upcall.c
index cb6e60ef..0220d250 100644
--- a/programs/http_client_upcall.c
+++ b/programs/http_client_upcall.c
@@ -204,7 +204,7 @@ main(int argc, char *argv[])
 		goto out;
 	}
 
-	//usrsctp_set_non_blocking(sock, 1);
+	/* usrsctp_set_non_blocking(sock, 1); */
 
 	rtoinfo.srto_assoc_id = 0;
 	rtoinfo.srto_initial = 1000;
diff --git a/programs/programs_helper.h b/programs/programs_helper.h
index 343cbaba..132685a3 100644
--- a/programs/programs_helper.h
+++ b/programs/programs_helper.h
@@ -42,4 +42,4 @@ void handle_notification(union sctp_notification *notif, size_t n);
 	} while (0)
 #endif
 
-#endif // __PROGRAMS_HELPER_H__
+#endif /* __PROGRAMS_HELPER_H__ */ 
diff --git a/programs/rtcweb.c b/programs/rtcweb.c
index d7b67cbc..01470ad4 100644
--- a/programs/rtcweb.c
+++ b/programs/rtcweb.c
@@ -120,10 +120,10 @@ struct peer_connection {
 #define SCTP_PACKED
 #endif
 
-#if defined(_WIN32)
+#if defined(_WIN32) && !defined(__MINGW32__)
 #pragma warning( push )
 #pragma warning( disable : 4200 )
-#endif //defined(_WIN32)
+#endif /* defined(_WIN32) && !defined(__MINGW32__) */
 struct rtcweb_datachannel_open_request {
 	uint8_t msg_type; /* DATA_CHANNEL_OPEN_REQUEST */
 	uint8_t channel_type;
@@ -132,9 +132,9 @@ struct rtcweb_datachannel_open_request {
 	int16_t priority;
 	char label[];
 } SCTP_PACKED;
-#if defined(_WIN32)
+#if defined(_WIN32) && !defined(__MINGW32__)
 #pragma warning( pop )
-#endif //defined(_WIN32)
+#endif /* defined(_WIN32) && !defined(__MINGW32__) */
 
 struct rtcweb_datachannel_open_response {
 	uint8_t  msg_type; /* DATA_CHANNEL_OPEN_RESPONSE */
@@ -1432,7 +1432,7 @@ main(int argc, char *argv[])
 	unlock_peer_connection(&peer_connection);
 
 	for (;;) {
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(__MINGW32__)
 		if (gets_s(line, LINE_LENGTH) == NULL) {
 #else
 		if (fgets(line, LINE_LENGTH, stdin) == NULL) {
diff --git a/programs/tsctp.c b/programs/tsctp.c
index 8068c1ad..d7c23e40 100644
--- a/programs/tsctp.c
+++ b/programs/tsctp.c
@@ -127,9 +127,8 @@ handle_connection(void *arg)
 {
 	ssize_t n;
 	char *buf;
-#ifdef _WIN32
-	HANDLE tid;
-#else
+
+#if !defined(_WIN32)
 	pthread_t tid;
 #endif
 	struct socket *conn_sock;
@@ -151,9 +150,8 @@ handle_connection(void *arg)
 	unsigned long long sum = 0;
 
 	conn_sock = *(struct socket **)arg;
-#ifdef _WIN32
-	tid = GetCurrentThread();
-#else
+
+#if !defined(_WIN32)
 	tid = pthread_self();
 	pthread_detach(tid);
 #endif
@@ -349,7 +347,6 @@ int main(int argc, char **argv)
 	unsigned long messages = 0;
 #ifdef _WIN32
 	unsigned long srcAddr;
-	HANDLE tid;
 #else
 	in_addr_t srcAddr;
 	pthread_t tid;
@@ -648,19 +645,19 @@ int main(int argc, char **argv)
 					continue;
 				}
 #ifdef _WIN32
-				tid = CreateThread(NULL, 0, &handle_connection, (void *)conn_sock, 0, NULL);
+				CreateThread(NULL, 0, &handle_connection, (void *)conn_sock, 0, NULL);
 #else
 				pthread_create(&tid, NULL, &handle_connection, (void *)conn_sock);
 #endif
 			}
 			if (verbose) {
-				// const char *inet_ntop(int af, const void *src, char *dst, socklen_t size)
-				//inet_ntoa(remote_addr.sin_addr)
+				/* const char *inet_ntop(int af, const void *src, char *dst, socklen_t size)
+				inet_ntoa(remote_addr.sin_addr) */
 				char addrbuf[INET_ADDRSTRLEN];
 				printf("Connection accepted from %s:%d\n", inet_ntop(AF_INET, &(remote_addr.sin_addr), addrbuf, INET_ADDRSTRLEN), ntohs(remote_addr.sin_port));
 			}
 		}
-		//usrsctp_close(psock); // unreachable
+		/* usrsctp_close(psock);  unreachable */
 	} else {
 		memset(&encaps, 0, sizeof(struct sctp_udpencaps));
 		encaps.sue_address.ss_family = AF_INET;
diff --git a/usrsctplib/CMakeLists.txt b/usrsctplib/CMakeLists.txt
index 595f529c..917b7506 100644
--- a/usrsctplib/CMakeLists.txt
+++ b/usrsctplib/CMakeLists.txt
@@ -173,8 +173,8 @@ add_library(usrsctp-static STATIC ${usrsctp_sources} ${usrsctp_headers})
 
 if (WIN32)
 	message(STATUS "link library: ws2_32")
-	target_link_libraries(usrsctp ws2_32)
-	target_link_libraries(usrsctp-static ws2_32)
+	target_link_libraries(usrsctp ws2_32 Iphlpapi.lib)
+	target_link_libraries(usrsctp-static ws2_32 Iphlpapi.lib)
 endif ()
 
 set_target_properties(usrsctp-static PROPERTIES OUTPUT_NAME "usrsctp")
diff --git a/usrsctplib/netinet/sctp_cc_functions.c b/usrsctplib/netinet/sctp_cc_functions.c
index e53e4d74..41a3c80b 100755
--- a/usrsctplib/netinet/sctp_cc_functions.c
+++ b/usrsctplib/netinet/sctp_cc_functions.c
@@ -2410,7 +2410,7 @@ sctp_htcp_cwnd_update_after_ecn_echo(struct sctp_tcb *stcb,
 
 const struct sctp_cc_functions sctp_cc_functions[] = {
 {
-#if defined(__Windows__) || defined(__Userspace_os_Windows)
+#if (defined(__Windows__) || defined(__Userspace_os_Windows)) && !defined(__MINGW32__)
 	sctp_set_initial_cc_param,
 	sctp_cwnd_update_after_sack,
 	sctp_cwnd_update_exit_pf_common,
@@ -2431,7 +2431,7 @@ const struct sctp_cc_functions sctp_cc_functions[] = {
 #endif
 },
 {
-#if defined(__Windows__) || defined(__Userspace_os_Windows)
+#if (defined(__Windows__) || defined(__Userspace_os_Windows)) && !defined(__MINGW32__)
 	sctp_set_initial_cc_param,
 	sctp_hs_cwnd_update_after_sack,
 	sctp_cwnd_update_exit_pf_common,
@@ -2452,7 +2452,7 @@ const struct sctp_cc_functions sctp_cc_functions[] = {
 #endif
 },
 {
-#if defined(__Windows__) || defined(__Userspace_os_Windows)
+#if (defined(__Windows__) || defined(__Userspace_os_Windows)) && !defined(__MINGW32__)
 	sctp_htcp_set_initial_cc_param,
 	sctp_htcp_cwnd_update_after_sack,
 	sctp_cwnd_update_exit_pf_common,
diff --git a/usrsctplib/netinet/sctp_os_userspace.h b/usrsctplib/netinet/sctp_os_userspace.h
index 765deed2..5eabeac9 100755
--- a/usrsctplib/netinet/sctp_os_userspace.h
+++ b/usrsctplib/netinet/sctp_os_userspace.h
@@ -106,8 +106,9 @@ typedef DWORD userland_thread_id_t;
 #define n_time     unsigned __int32
 #define sa_family_t unsigned __int8
 #define ssize_t    __int64
+#if !defined(__MINGW32__)
 #define __func__	__FUNCTION__
-
+#endif
 #ifndef EWOULDBLOCK
 #define EWOULDBLOCK             WSAEWOULDBLOCK
 #endif
@@ -221,7 +222,7 @@ typedef char* caddr_t;
 
 #define bzero(buf, len) memset(buf, 0, len)
 #define bcopy(srcKey, dstKey, len) memcpy(dstKey, srcKey, len)
-#if defined(_MSC_VER) && (_MSC_VER < 1900)
+#if defined(_MSC_VER) && (_MSC_VER < 1900) && !defined(__MINGW32__)
 #define snprintf(data, size, format, ...) _snprintf_s(data, size, _TRUNCATE, format, __VA_ARGS__)
 #endif
 #define inline __inline
diff --git a/usrsctplib/netinet/sctp_pcb.c b/usrsctplib/netinet/sctp_pcb.c
index 55390bcc..f21f7002 100755
--- a/usrsctplib/netinet/sctp_pcb.c
+++ b/usrsctplib/netinet/sctp_pcb.c
@@ -6849,7 +6849,9 @@ sctp_pcb_init()
 #endif
 #if defined(__Userspace__)
 	mbuf_initialize(NULL);
+#if !defined(__MINGW32__)
 	atomic_init();
+#endif
 #if defined(INET) || defined(INET6)
 	recv_thread_init();
 #endif
diff --git a/usrsctplib/netinet/sctp_pcb.h b/usrsctplib/netinet/sctp_pcb.h
index 34881863..5b8f6613 100755
--- a/usrsctplib/netinet/sctp_pcb.h
+++ b/usrsctplib/netinet/sctp_pcb.h
@@ -320,7 +320,7 @@ struct sctp_base_info {
 #endif
 #endif
 #ifdef INET
-#if defined(__Userspace_os_Windows)
+#if defined(__Userspace_os_Windows) && !defined(__MINGW32__)
 	SOCKET userspace_rawsctp;
 	SOCKET userspace_udpsctp;
 #else
@@ -331,7 +331,7 @@ struct sctp_base_info {
 	userland_thread_t recvthreadudp;
 #endif
 #ifdef INET6
-#if defined(__Userspace_os_Windows)
+#if defined(__Userspace_os_Windows) && !defined(__MINGW32__)
 	SOCKET userspace_rawsctp6;
 	SOCKET userspace_udpsctp6;
 #else
diff --git a/usrsctplib/netinet/sctp_userspace.c b/usrsctplib/netinet/sctp_userspace.c
index be547836..2005b24b 100755
--- a/usrsctplib/netinet/sctp_userspace.c
+++ b/usrsctplib/netinet/sctp_userspace.c
@@ -31,8 +31,10 @@
 #include <netinet/sctp_pcb.h>
 #include <sys/timeb.h>
 #include <iphlpapi.h>
+#if !defined(__MINGW32__)
 #pragma comment(lib, "IPHLPAPI.lib")
 #endif
+#endif
 #include <netinet/sctp_os_userspace.h>
 #if defined(__Userspace_os_FreeBSD)
 #include <pthread_np.h>
@@ -46,6 +48,10 @@
 /* Adapter to translate Unix thread start routines to Windows thread start
  * routines.
  */
+#if defined(__MINGW32__)
+#pragma GCC diagnostic push 
+#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
 static DWORD WINAPI
 sctp_create_thread_adapter(void *arg) {
 	start_routine_t start_routine = (start_routine_t)arg;
@@ -75,6 +81,10 @@ sctp_userspace_thread_equal(userland_thread_id_t t1, userland_thread_id_t t2)
 	return (t1 == t2);
 }
 
+#if defined(__MINGW32__)
+#pragma GCC diagnostic pop
+#endif
+
 #else
 int
 sctp_userspace_thread_create(userland_thread_t *thread, start_routine_t start_routine)
diff --git a/usrsctplib/user_atomic.h b/usrsctplib/user_atomic.h
index 77ea77b6..2e6db048 100755
--- a/usrsctplib/user_atomic.h
+++ b/usrsctplib/user_atomic.h
@@ -78,7 +78,9 @@
 }
 #endif
 #if defined(__Userspace_os_Windows)
+#if !defined(__MINGW32__)
 static void atomic_init(void) {} /* empty when we are not using atomic_mtx */
+#endif
 #else
 static inline void atomic_init(void) {} /* empty when we are not using atomic_mtx */
 #endif
diff --git a/usrsctplib/user_environment.h b/usrsctplib/user_environment.h
index 7179f1f8..2b40ceeb 100755
--- a/usrsctplib/user_environment.h
+++ b/usrsctplib/user_environment.h
@@ -62,7 +62,7 @@ extern int ipport_firstauto, ipport_lastauto;
  */
 extern int nmbclusters;
 
-#if !defined(_MSC_VER)
+#if !defined(_MSC_VER) && !defined(__MINGW32__)
 #define min(a,b) ((a)>(b)?(b):(a))
 #define max(a,b) ((a)>(b)?(a):(b))
 #endif
diff --git a/usrsctplib/user_mbuf.c b/usrsctplib/user_mbuf.c
index d9f5a5cb..a5037249 100755
--- a/usrsctplib/user_mbuf.c
+++ b/usrsctplib/user_mbuf.c
@@ -313,7 +313,7 @@ m_getm2(struct mbuf *m, int len, int how, short type, int flags, int allonebuf)
 			mb = m_gethdr(how, type);
 			MCLGET(mb, how);
 			size = MCLBYTES;
-			//SCTP_BUF_LEN(mb) = MCLBYTES;
+			/* SCTP_BUF_LEN(mb) = MCLBYTES; */
 		} else if (flags & M_PKTHDR) {
 			mb = m_gethdr(how, type);
 			if (len < MHLEN) {
diff --git a/usrsctplib/user_recv_thread.c b/usrsctplib/user_recv_thread.c
index 4d73a312..ae5e517d 100755
--- a/usrsctplib/user_recv_thread.c
+++ b/usrsctplib/user_recv_thread.c
@@ -449,10 +449,8 @@ recv_function_raw6(void *arg)
 #else
 	WSABUF recv_iovec[MAXLEN_MBUF_CHAIN];
 	int nResult, m_ErrorCode;
-	DWORD flags;
 	DWORD ncounter = 0;
 	struct sockaddr_in6 from;
-	int fromlen;
 	GUID WSARecvMsg_GUID = WSAID_WSARECVMSG;
 	LPFN_WSARECVMSG WSARecvMsg;
 	WSACMSGHDR *cmsgptr;
@@ -494,9 +492,7 @@ recv_function_raw6(void *arg)
 		}
 		to_fill = 0;
 #if defined(__Userspace_os_Windows)
-		flags = 0;
 		ncounter = 0;
-		fromlen = sizeof(struct sockaddr_in6);
 		memset(&from, 0, sizeof(struct sockaddr_in6));
 		nResult = WSAIoctl(SCTP_BASE_VAR(userspace_rawsctp6), SIO_GET_EXTENSION_FUNCTION_POINTER,
 		                   &WSARecvMsg_GUID, sizeof WSARecvMsg_GUID,
@@ -849,10 +845,10 @@ recv_function_udp6(void *arg)
 	char cmsgbuf[CMSG_SPACE(sizeof (struct in6_pktinfo))];
 	int compute_crc = 1;
 #if !defined(__Userspace_os_Windows)
-	unsigned int ncounter;
 	struct iovec iov[MAXLEN_MBUF_CHAIN];
 	struct msghdr msg;
 	struct cmsghdr *cmsgptr;
+	unsigned int ncounter;
 #else
 	GUID WSARecvMsg_GUID = WSAID_WSARECVMSG;
 	LPFN_WSARECVMSG WSARecvMsg;
@@ -860,8 +856,8 @@ recv_function_udp6(void *arg)
 	WSABUF iov[MAXLEN_MBUF_CHAIN];
 	WSAMSG msg;
 	int nResult, m_ErrorCode;
-	DWORD ncounter;
 	WSACMSGHDR *cmsgptr;
+	DWORD ncounter;
 #endif
 
 	sctp_userspace_set_threadname("SCTP/UDP/IP6 rcv");
diff --git a/usrsctplib/user_socket.c b/usrsctplib/user_socket.c
index 01815a9b..6ac0af7e 100755
--- a/usrsctplib/user_socket.c
+++ b/usrsctplib/user_socket.c
@@ -3138,14 +3138,14 @@ sctp_userspace_ip_output(int *result, struct mbuf *o_pak,
 	if ((!use_udp_tunneling) && (SCTP_BASE_VAR(userspace_rawsctp) != -1)) {
 		if (WSASendTo(SCTP_BASE_VAR(userspace_rawsctp), (LPWSABUF) send_iovec, iovcnt, &win_sent_len, win_msg_hdr.dwFlags, win_msg_hdr.name, (int) win_msg_hdr.namelen, NULL, NULL) != 0) {
 			*result = WSAGetLastError();
-		} else if (win_sent_len != send_len) {
+		} else if ((int)win_sent_len != send_len) {
 			*result = WSAGetLastError();
 		}
 	}
 	if ((use_udp_tunneling) && (SCTP_BASE_VAR(userspace_udpsctp) != -1)) {
 		if (WSASendTo(SCTP_BASE_VAR(userspace_udpsctp), (LPWSABUF) send_iovec, iovcnt, &win_sent_len, win_msg_hdr.dwFlags, win_msg_hdr.name, (int) win_msg_hdr.namelen, NULL, NULL) != 0) {
 			*result = WSAGetLastError();
-		} else if (win_sent_len != send_len) {
+		} else if ((int)win_sent_len != send_len) {
 			*result = WSAGetLastError();
 		}
 	}
@@ -3292,14 +3292,14 @@ void sctp_userspace_ip6_output(int *result, struct mbuf *o_pak,
 	if ((!use_udp_tunneling) && (SCTP_BASE_VAR(userspace_rawsctp6) != -1)) {
 		if (WSASendTo(SCTP_BASE_VAR(userspace_rawsctp6), (LPWSABUF) send_iovec, iovcnt, &win_sent_len, win_msg_hdr.dwFlags, win_msg_hdr.name, (int) win_msg_hdr.namelen, NULL, NULL) != 0) {
 			*result = WSAGetLastError();
-		} else if (win_sent_len != send_len) {
+		} else if ((int)win_sent_len != send_len) {
 			*result = WSAGetLastError();
 		}
 	}
 	if ((use_udp_tunneling) && (SCTP_BASE_VAR(userspace_udpsctp6) != -1)) {
 		if (WSASendTo(SCTP_BASE_VAR(userspace_udpsctp6), (LPWSABUF) send_iovec, iovcnt, &win_sent_len, win_msg_hdr.dwFlags, win_msg_hdr.name, (int) win_msg_hdr.namelen, NULL, NULL) != 0) {
 			*result = WSAGetLastError();
-		} else if (win_sent_len != send_len) {
+		} else if ((int)win_sent_len != send_len) {
 			*result = WSAGetLastError();
 		}
 	}
@@ -3378,9 +3378,15 @@ usrsctp_dumppacket(const void *buf, size_t len, int outbound)
 #ifdef _WIN32
 	ftime(&tb);
 	localtime_s(&t, &tb.time);
+#if defined(__MINGW32__)
+	snprintf(dump_buf, PREAMBLE_LENGTH + 1, PREAMBLE_FORMAT,
+	            outbound ? 'O' : 'I',
+	            t.tm_hour, t.tm_min, t.tm_sec, (long)(1000 * tb.millitm));
+#else
 	_snprintf_s(dump_buf, PREAMBLE_LENGTH + 1, PREAMBLE_LENGTH, PREAMBLE_FORMAT,
 	            outbound ? 'O' : 'I',
 	            t.tm_hour, t.tm_min, t.tm_sec, (long)(1000 * tb.millitm));
+#endif
 #else
 	gettimeofday(&tv, NULL);
 	sec = (time_t)tv.tv_sec;
@@ -3390,7 +3396,7 @@ usrsctp_dumppacket(const void *buf, size_t len, int outbound)
 	         t.tm_hour, t.tm_min, t.tm_sec, (long)tv.tv_usec);
 #endif
 	pos += PREAMBLE_LENGTH;
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(__MINGW32__)
 	strncpy_s(dump_buf + pos, strlen(HEADER) + 1, HEADER, strlen(HEADER));
 #else
 	strcpy(dump_buf + pos, HEADER);
@@ -3407,7 +3413,7 @@ usrsctp_dumppacket(const void *buf, size_t len, int outbound)
 		dump_buf[pos++] = low < 10 ? '0' + low : 'a' + (low - 10);
 		dump_buf[pos++] = ' ';
 	}
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(__MINGW32__)
 	strncpy_s(dump_buf + pos, strlen(TRAILER) + 1, TRAILER, strlen(TRAILER));
 #else
 	strcpy(dump_buf + pos, TRAILER);
diff --git a/usrsctplib/user_socketvar.h b/usrsctplib/user_socketvar.h
index e00c4c7a..470d781f 100755
--- a/usrsctplib/user_socketvar.h
+++ b/usrsctplib/user_socketvar.h
@@ -102,7 +102,9 @@ struct uio {
  */
 #if defined (__Userspace_os_Windows)
 #define AF_ROUTE  17
+#if !defined(__MINGW32__)
 typedef __int32 pid_t;
+#endif
 typedef unsigned __int32 uid_t;
 enum sigType {
 	SIGNAL = 0,