Merge pull request #508 from anhu/connfd_to_bytesReceived

recvfrom() returns the bytes received; not a file descriptor.

Author: dgarske

dtls/README.md

@@ -394,7 +394,7 @@ With this change we will also rename `addrlen` to `clilen` to remind us that thi
 ```c
 int                  on = 1;
 int                 res = 1;
-int              connfd = 0;
+int              bytesReceived = 0;
 int             recvlen = 0;    /* length of message */
 int            listenfd = 0;    /* Initialize our socket */
 WOLFSSL* ssl =          NULL;
@@ -556,16 +556,16 @@ Here is where we will now set `clilen = sizeof(cliaddr);` as well. We will decla
 /* set clilen to |cliaddr| */
 clilen =    sizeof(cliaddr); /* will be moved to the variable section later */
 unsigned char       b[1500]; /* will be moved to the variable section later */
-int              connfd = 0; /* will be moved to the variable section later */
+int              bytesReceived = 0; /* will be moved to the variable section later */
 
-connfd = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
+bytesReceived = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
                                   (struct sockaddr*)&cliaddr, &clilen);
-if (connfd < 0){
+if (bytesReceived < 0){
     printf("No clients in que, enter idle state\n");
     continue;
 }
 
-else if (connfd > 0) {
+else if (bytesReceived > 0) {
     if (connect(listenfd, (const struct sockaddr *)&cliaddr,
         sizeof(cliaddr)) != 0) {
         printf("Udp connect failed.\n");

dtls/server-dtls-ipv6.c

@@ -64,7 +64,7 @@ int main(int argc, char** argv)
     /* Variables for awaiting datagram */
     int           on = 1;
     int           res = 1;
-    int           connfd = 0;
+    int           bytesReceived = 0;
     int           recvLen = 0;    /* length of message */
     int           listenfd = 0;   /* Initialize our socket */
     WOLFSSL*      ssl = NULL;
@@ -147,14 +147,14 @@ int main(int argc, char** argv)
         printf("Awaiting client connection on port %d\n", SERV_PORT);
 
         cliLen = sizeof(cliaddr);
-        connfd = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
+        bytesReceived = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
                 (struct sockaddr*)&cliaddr, &cliLen);
 
-        if (connfd < 0) {
+        if (bytesReceived < 0) {
             printf("No clients in que, enter idle state\n");
             continue;
         }
-        else if (connfd > 0) {
+        else if (bytesReceived > 0) {
             if (connect(listenfd, (const struct sockaddr *)&cliaddr,
                         sizeof(cliaddr)) != 0) {
                 printf("Udp connect failed.\n");

dtls/server-dtls-rw-threads.c

@@ -228,7 +228,7 @@ int main(int argc, char** argv)
     /* Variables for awaiting datagram */
     int           on = 1;
     int           res = 1;
-    int           connfd = 0;
+    int           bytesReceived = 0;
     int           listenfd = 0;   /* Initialize our socket */
     int           flags = fcntl(*(&listenfd), F_GETFL, 0);
     WOLFSSL*      ssl = NULL;
@@ -319,15 +319,15 @@ int main(int argc, char** argv)
         printf("Awaiting client connection on port %d\n", SERV_PORT);
 
         cliLen = sizeof(cliaddr);
-        connfd = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
+        bytesReceived = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
                 (struct sockaddr*)&cliaddr, &cliLen);
 
-        if (connfd < 0) {
+        if (bytesReceived < 0) {
             printf("No clients in que, enter idle state\n");
             close(listenfd);
             continue;
         }
-        else if (connfd > 0) {
+        else if (bytesReceived > 0) {
             if (connect(listenfd, (const struct sockaddr *)&cliaddr,
                         sizeof(cliaddr)) != 0) {
                 printf("Udp connect failed.\n");

dtls/server-dtls.c

@@ -57,7 +57,7 @@ int main(int argc, char** argv)
     /* Variables for awaiting datagram */
     int           on = 1;
     int           res = 1;
-    int           connfd = 0;
+    int           bytesReceived = 0;
     int           recvLen = 0;    /* length of message */
     int           listenfd = 0;   /* Initialize our socket */
     WOLFSSL*      ssl = NULL;
@@ -140,15 +140,15 @@ int main(int argc, char** argv)
         printf("Awaiting client connection on port %d\n", SERV_PORT);
 
         cliLen = sizeof(cliaddr);
-        connfd = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
+        bytesReceived = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
                 (struct sockaddr*)&cliaddr, &cliLen);
 
-        if (connfd < 0) {
+        if (bytesReceived < 0) {
             printf("No clients in que, enter idle state\n");
             close(listenfd);
             continue;
         }
-        else if (connfd > 0) {
+        else if (bytesReceived > 0) {
             if (connect(listenfd, (const struct sockaddr *)&cliaddr,
                         sizeof(cliaddr)) != 0) {
                 printf("Udp connect failed.\n");