Added a fourth application: plink, a command line connection utility

[u/mdw/putty] / raw.c

diff --git a/raw.c b/raw.c
index ff37b6d..2c3e852 100644 (file)
--- a/raw.c
+++ b/raw.c
@@ -14,8 +14,6 @@
 
 static SOCKET s = INVALID_SOCKET;
 
-#define iswritable(x) ( (x) != IAC && (x) != CR )
-
 static void raw_size(void);
 
 static int sb_opt, sb_len;
@@ -50,14 +48,8 @@ static void s_write (void *buf, int len) {
 }
 
 static void c_write (char *buf, int len) {
-    while (len--) {
-       int new_head = (inbuf_head + 1) & INBUF_MASK;
-       int c = (unsigned char) *buf;
-       if (new_head != inbuf_reap) {
-           inbuf[inbuf_head] = *buf++;
-           inbuf_head = new_head;
-       }
-    }
+    while (len--) 
+        c_write1(*buf++);
 }
 
 /*
@@ -132,7 +124,7 @@ static char *raw_init (HWND hwnd, char *host, int port, char **realhost) {
          default: return "connect(): unknown error";
        }
 
-    if (WSAAsyncSelect (s, hwnd, WM_NETEVENT, FD_READ |
+    if (hwnd && WSAAsyncSelect (s, hwnd, WM_NETEVENT, FD_READ |
                        FD_WRITE | FD_OOB | FD_CLOSE) == SOCKET_ERROR)
        switch (WSAGetLastError()) {
          case WSAENETDOWN: return "Network is down";
@@ -150,14 +142,22 @@ static int raw_msg (WPARAM wParam, LPARAM lParam) {
     int ret;
     char buf[256];
 
-    if (s == INVALID_SOCKET)          /* how the hell did we get here?! */
-       return -5000;
+    /*
+     * Because reading less than the whole of the available pending
+     * data can generate an FD_READ event, we need to allow for the
+     * possibility that FD_READ may arrive with FD_CLOSE already in
+     * the queue; so it's possible that we can get here even with s
+     * invalid. If so, we return 1 and don't worry about it.
+     */
+    if (s == INVALID_SOCKET)
+       return 1;
 
     if (WSAGETSELECTERROR(lParam) != 0)
        return -WSAGETSELECTERROR(lParam);
 
     switch (WSAGETSELECTEVENT(lParam)) {
       case FD_READ:
+      case FD_CLOSE:
        ret = recv(s, buf, sizeof(buf), 0);
        if (ret < 0 && WSAGetLastError() == WSAEWOULDBLOCK)
            return 1;
@@ -165,7 +165,7 @@ static int raw_msg (WPARAM wParam, LPARAM lParam) {
            return -10000-WSAGetLastError();
        if (ret == 0) {
            s = INVALID_SOCKET;
-           return 0;                  /* can't happen, in theory */
+           return 0;
        }
        c_write( buf, ret );
        return 1;
@@ -184,9 +184,6 @@ static int raw_msg (WPARAM wParam, LPARAM lParam) {
        if (outbuf_head != outbuf_reap)
            try_write();
        return 1;
-      case FD_CLOSE:
-       s = INVALID_SOCKET;
-       return 0;
     }
     return 1;                         /* shouldn't happen, but WTF */
 }
@@ -218,10 +215,13 @@ static void raw_special (Telnet_Special code) {
     return;
 }
 
+SOCKET raw_socket(void) { return s; }
+
 Backend raw_backend = {
     raw_init,
     raw_msg,
     raw_send,
     raw_size,
-    raw_special
+    raw_special,
+    raw_socket
 };