From 7f4b865a5bf94dea63ff5510a801df0ad315bfdb Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Thu, 31 Mar 2022 22:59:55 +0200
Subject: Added naive support for posix platforms in NetSock

---
 NetEx/NetSock.cpp | 64 ++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 51 insertions(+), 13 deletions(-)

(limited to 'NetEx')

diff --git a/NetEx/NetSock.cpp b/NetEx/NetSock.cpp
index 38ce9d5..3d3da63 100644
--- a/NetEx/NetSock.cpp
+++ b/NetEx/NetSock.cpp
@@ -13,7 +13,25 @@
 
 #include "NetSock.h"
 
+#ifdef _WIN32
 #include <winsock2.h>
+using socklen_t = int;
+#else
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <unistd.h>
+#include <fcntl.h>
+#define INVALID_SOCKET -1
+#define SOCKET_ERROR -1
+#define WSAENETDOWN ENETDOWN
+#define WSAENETRESET ENETRESET
+#define WSAEINTR EINTR
+#define WSAESHUTDOWN ESHUTDOWN
+#define WSAECONNABORTED ECONNABORTED
+#define WSAECONNRESET ECONNRESET
+#define WSAETIMEDOUT ETIMEDOUT
+#define WSAEWOULDBLOCK EWOULDBLOCK
+#endif
 
 #include <cstdint>
 
@@ -94,11 +112,11 @@ NetSock::accept(NetAddr* addr)
 {
     if (closed || s == INVALID_SOCKET) return 0;
 
-    SOCKET conn = INVALID_SOCKET;
+    int conn = INVALID_SOCKET;
 
     if (addr) {
         sockaddr a;
-        int      asize = sizeof(a);
+        socklen_t asize = sizeof(a);
 
         conn = ::accept(s, &a, &asize);
 
@@ -189,7 +207,7 @@ NetSock::recvfrom(NetAddr* a)
     int rlen = 0;
 
     if (a) {
-        int addrlen = a->GetSockAddrLength();
+        socklen_t addrlen = a->GetSockAddrLength();
         rlen = ::recvfrom(s, rbuf, sizeof(rbuf), 0, a->GetSockAddr(), &addrlen);
         a->InitFromSockAddr();
     }
@@ -216,21 +234,20 @@ NetSock::select(SELECT_TYPE t, long seconds, long microseconds)
 {
     if (closed || s == INVALID_SOCKET) return INVALID_SOCKET;
 
-    FD_SET fd;
-    ZeroMemory(&fd, sizeof(fd));
+    fd_set fd;
+    std::memset(&fd, 0, sizeof(fd));
 
     FD_SET(s, &fd);
-    TIMEVAL  timeval = {seconds, microseconds};
-    TIMEVAL* timeout = &timeval;
+    struct timeval timeout = {seconds, microseconds};
 
     if (t == SELECT_READ)
-        return stat = ::select(1, &fd, 0, 0, timeout);
+        return stat = ::select(1, &fd, 0, 0, &timeout);
 
     else if (t == SELECT_WRITE)
-        return stat = ::select(1, 0, &fd, 0, timeout);
+        return stat = ::select(1, 0, &fd, 0, &timeout);
 
     else if (t == (SELECT_READ|SELECT_WRITE))
-        return stat = ::select(1, &fd, &fd, 0, timeout);
+        return stat = ::select(1, &fd, &fd, 0, &timeout);
 
     return 0;
 }
@@ -245,8 +262,12 @@ NetSock::set_timeout(int msecs)
 
     // zero timeout means non-blocking
     if (msecs == 0) {
-        u_long nonblocking = 1;
-        if (::ioctlsocket(s, FIONBIO, &nonblocking) == SOCKET_ERROR) {
+#ifdef _WIN32
+            u_long nonblocking = 1;
+            if (::ioctlsocket(s, FIONBIO, &nonblocking) == SOCKET_ERROR) {
+#else
+            if (::fcntl(s, F_SETFL, (fcntl(s, F_GETFL, 0) | O_NONBLOCK)) == SOCKET_ERROR) {
+#endif
             stat = NetLayer::GetLastError();
             return stat;
         }
@@ -255,8 +276,12 @@ NetSock::set_timeout(int msecs)
     // non-zero timeout means blocking
     else {
         if (current_timeout == 0) {
+#ifdef _WIN32
             u_long nonblocking = 0;   // disable non-blocking
             if (::ioctlsocket(s, FIONBIO, &nonblocking) == SOCKET_ERROR) {
+#else
+            if (::fcntl(s, F_SETFL, (fcntl(s, F_GETFL, 0) & ~O_NONBLOCK)) == SOCKET_ERROR) {
+#endif
                 stat = NetLayer::GetLastError();
                 return stat;
             }
@@ -286,7 +311,11 @@ int
 NetSock::shutdown_input()
 {
     if (closed || s == INVALID_SOCKET) return INVALID_SOCKET;
+#ifdef _WIN32
     ::shutdown(s, SD_RECEIVE);
+#else
+    ::shutdown(s, SHUT_RD);
+#endif
     return 0;
 }
 
@@ -296,7 +325,11 @@ int
 NetSock::shutdown_output()
 {
     if (closed || s == INVALID_SOCKET) return INVALID_SOCKET;
+#ifdef _WIN32
     ::shutdown(s, SD_SEND);
+#else
+    ::shutdown(s, SHUT_WR);
+#endif
     return 0;
 }
 
@@ -306,8 +339,13 @@ int
 NetSock::close()
 {
     if (s != INVALID_SOCKET && !closed) {
+#ifdef _WIN32
         ::shutdown(s, SD_BOTH);
         ::closesocket(s);
+#else
+        ::shutdown(s, SHUT_RDWR);
+        ::close(s);
+#endif
 
         closed = true;
     }
@@ -321,7 +359,7 @@ std::uint32_t
 NetSock::max_packet_size() const
 {
     std::uint32_t size = 0;
-    int   len  = sizeof(size);
+    socklen_t len  = sizeof(size);
 
     ::getsockopt(s, SOL_SOCKET, 0x2003, (char*) &size, &len);
 
-- 
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