hotfix #200, deadloop when read/write 0 and ETIME. 1.0.6.

@@ -208,10 +208,11 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 
 ## History
+* v2.0, 2014-11-13, hotfix [#200](https://github.com/winlinvip/simple-rtmp-server/issues/200), deadloop when read/write 0 and ETIME. 1.0.6.
 * v1.0, 2014-11-06, use number for macro VERSION_MAJOR, VERSION_MINOR and VERSION_REVISION. 1.0.5.
-* v1.0, 2014-10-24, fix [#186](https://github.com/winlinvip/simple-rtmp-server/issues/186), hotfix for bug #186, drop connect args when not object. 1.0.3.
+* v1.0, 2014-10-24, hotfix [#186](https://github.com/winlinvip/simple-rtmp-server/issues/186), drop connect args when not object. 1.0.3.
 * v1.0, 2014-10-24, rename wiki/xxx to wiki/v1_CN_xxx. 1.0.2.
-* v1.0, 2014-10-19, fix [#183](https://github.com/winlinvip/simple-rtmp-server/issues/183), hotfix for bug #183, donot support AnnexB when decoding RTMP body for HLS. 1.0.1.
+* v1.0, 2014-10-19, hotfix [#183](https://github.com/winlinvip/simple-rtmp-server/issues/183), donot support AnnexB when decoding RTMP body for HLS. 1.0.1.
 * <strong>v1.0, 2014-10-09, [1.0 beta(1.0.0)](https://github.com/winlinvip/simple-rtmp-server/releases/tag/1.0.beta) released. 59316 lines.</strong>
 * v1.0, 2014-10-08, fix [#151](https://github.com/winlinvip/simple-rtmp-server/issues/151), always reap ts whatever audio or video packet. 0.9.223.
 * v1.0, 2014-10-08, fix [#162](https://github.com/winlinvip/simple-rtmp-server/issues/162), failed if no epoll. 0.9.222.

@@ -82,8 +82,10 @@ int SrsStSocket::read(void* buf, size_t size, ssize_t* nread)
     
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // (a value of 0 means the network connection is closed or end of file is reached).
+    // Otherwise, a value of -1 is returned and errno is set to indicate the error. 
     if (nb_read <= 0) {
-        if (errno == ETIME) {
+        // @see https://github.com/winlinvip/simple-rtmp-server/issues/200
+        if (nb_read < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
         }
         
@@ -110,8 +112,10 @@ int SrsStSocket::read_fully(void* buf, size_t size, ssize_t* nread)
     
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // (a value less than nbyte means the network connection is closed or end of file is reached)
+    // Otherwise, a value of -1 is returned and errno is set to indicate the error. 
     if (nb_read != (ssize_t)size) {
-        if (errno == ETIME) {
+        // @see https://github.com/winlinvip/simple-rtmp-server/issues/200
+        if (nb_read < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
         }
         
@@ -136,8 +140,11 @@ int SrsStSocket::write(void* buf, size_t size, ssize_t* nwrite)
         *nwrite = nb_write;
     }
     
+    // On success a non-negative integer equal to nbyte is returned. 
+    // Otherwise, a value of -1 is returned and errno is set to indicate the error.
     if (nb_write <= 0) {
-        if (errno == ETIME) {
+        // @see https://github.com/winlinvip/simple-rtmp-server/issues/200
+        if (nb_write < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
         }
         
@@ -158,8 +165,11 @@ int SrsStSocket::writev(const iovec *iov, int iov_size, ssize_t* nwrite)
         *nwrite = nb_write;
     }
     
+    // On success a non-negative integer equal to nbyte is returned. 
+    // Otherwise, a value of -1 is returned and errno is set to indicate the error.
     if (nb_write <= 0) {
-        if (errno == ETIME) {
+        // @see https://github.com/winlinvip/simple-rtmp-server/issues/200
+        if (nb_write < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
         }
         

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       1
 #define VERSION_MINOR       0
-#define VERSION_REVISION    5
+#define VERSION_REVISION    6
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_ROLE "origin/edge server"

@@ -82,23 +82,27 @@ int SimpleSocketStream::read(void* buf, size_t size, ssize_t* nread)
 {
     int ret = ERROR_SUCCESS;
     
-    *nread = ::recv(fd, buf, size, 0);
+    ssize_t nb_read = ::recv(fd, buf, size, 0);
+    
+    if (nread) {
+        *nread = nb_read;
+    }
     
     // On success a non-negative integer indicating the number of bytes actually read is returned 
     // (a value of 0 means the network connection is closed or end of file is reached).
-    if (*nread <= 0) {
-        if (errno == ETIME) {
+    if (nb_read <= 0) {
+        if (nb_read < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
         }
         
-        if (*nread == 0) {
+        if (nb_read == 0) {
             errno = ECONNRESET;
         }
         
         return ERROR_SOCKET_READ;
     }
     
-    recv_bytes += *nread;
+    recv_bytes += nb_read;
     
     return ret;
 }
@@ -139,17 +143,25 @@ int SimpleSocketStream::writev(const iovec *iov, int iov_size, ssize_t* nwrite)
 {
     int ret = ERROR_SUCCESS;
     
-    *nwrite = ::writev(fd, iov, iov_size);
+    ssize_t nb_write = ::writev(fd, iov, iov_size);
+    
+    if (nwrite) {
+        *nwrite = nb_write;
+    }
     
-    if (*nwrite <= 0) {
-        if (errno == ETIME) {
+    // On  success,  the  readv()  function  returns the number of bytes read; 
+    // the writev() function returns the number of bytes written.  On error, -1 is
+    // returned, and errno is set appropriately.
+    if (nb_write <= 0) {
+        // @see https://github.com/winlinvip/simple-rtmp-server/issues/200
+        if (nb_write < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
         }
         
         return ERROR_SOCKET_WRITE;
     }
     
-    send_bytes += *nwrite;
+    send_bytes += nb_write;
     
     return ret;
 }
@@ -165,21 +177,24 @@ int SimpleSocketStream::read_fully(void* buf, size_t size, ssize_t* nread)
     int ret = ERROR_SUCCESS;
     
     size_t left = size;
-    *nread = 0;
+    ssize_t nb_read = 0;
     
     while (left > 0) {
-        char* this_buf = (char*)buf + *nread;
+        char* this_buf = (char*)buf + nb_read;
         ssize_t this_nread;
         
         if ((ret = this->read(this_buf, left, &this_nread)) != ERROR_SUCCESS) {
             return ret;
         }
         
-        *nread += this_nread;
+        nb_read += this_nread;
         left -= this_nread;
     }
     
-    recv_bytes += *nread;
+    if (nread) {
+        *nread = nb_read;
+    }
+    recv_bytes += nb_read;
     
     return ret;
 }
@@ -188,17 +203,22 @@ int SimpleSocketStream::write(void* buf, size_t size, ssize_t* nwrite)
 {
     int ret = ERROR_SUCCESS;
     
-    *nwrite = ::send(fd, (void*)buf, size, 0);
+    ssize_t nb_write = ::send(fd, (void*)buf, size, 0);
+    
+    if (nwrite) {
+        *nwrite = nb_write;
+    }
     
-    if (*nwrite <= 0) {
-        if (errno == ETIME) {
+    if (nb_write <= 0) {
+        // @see https://github.com/winlinvip/simple-rtmp-server/issues/200
+        if (nb_write < 0 && errno == ETIME) {
             return ERROR_SOCKET_TIMEOUT;
         }
         
         return ERROR_SOCKET_WRITE;
     }
     
-    send_bytes += *nwrite;
+    send_bytes += nb_write;
     
     return ret;
 }