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examples/externalsocket: add missing close socket calls

.. and for Windows also call WSACleanup since we call WSAStartup.

The example is to demonstrate handling the socket independently of
libcurl. In this case libcurl is not responsible for creating, opening
or closing the socket, it is handled by the application (our example).

Fixes #3663
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Andre Guibert de Bruet authored and jay committed Mar 11, 2019
1 parent 0bb5639 commit 57c70767930c0f0cbf93c56c28442cf34eb6af07
Showing with 9 additions and 1 deletion.
  1. +9 −1 docs/examples/externalsocket.c
@@ -124,8 +124,10 @@ int main(void)
servaddr.sin_port = htons(PORTNUM);

servaddr.sin_addr.s_addr = inet_addr(IPADDR);
if(INADDR_NONE == servaddr.sin_addr.s_addr)
if(INADDR_NONE == servaddr.sin_addr.s_addr) {
return 2;

if(connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) ==
-1) {
@@ -157,10 +159,16 @@ int main(void)



if(res) {
printf("libcurl error: %d\n", res);
return 4;

#ifdef WIN32
return 0;

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