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multi_socket: react on socket close immediately

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As a remedy to the problem when a socket gets closed and a new one is
opened with the same file descriptor number and as a result
multi.c:singlesocket() doesn't detect the difference, the new function
Curl_multi_closed() gets told when a socket is closed so that it can be
removed from the socket hash. When the old one has been removed, a new
socket should be detected fine by the singlesocket() on next invoke.

Bug: http://curl.haxx.se/bug/view.cgi?id=1248
Reported-by: Erik Johansson
This commit is contained in:
Daniel Stenberg 2013-06-19 23:54:28 +02:00
parent a9f5ad0e2a
commit 88c5c63ffc
3 changed files with 53 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/connect.c
View File

@ -1251,7 +1251,13 @@ int Curl_closesocket(struct connectdata *conn,
else
return conn->fclosesocket(conn->closesocket_client, sock);
}
return sclose(sock);
sclose(sock);
if(conn)
/* tell the multi-socket code about this */
Curl_multi_closed(conn, sock);
return 0;
}
/*

33
lib/multi.c
View File

@ -2051,6 +2051,39 @@ static void singlesocket(struct Curl_multi *multi,
easy->numsocks = num;
}
/*
* Curl_multi_closed()
*
* Used by the connect code to tell the multi_socket code that one of the
* sockets we were using have just been closed. This function will then
* remove it from the sockethash for this handle to make the multi_socket API
* behave properly, especially for the case when libcurl will create another
* socket again and it gets the same file descriptor number.
*/
void Curl_multi_closed(struct connectdata *conn, curl_socket_t s)
{
struct Curl_multi *multi = conn->data->multi;
if(multi) {
/* this is set if this connection is part of a handle that is added to
a multi handle, and only then this is necessary */
struct Curl_sh_entry *entry =
Curl_hash_pick(multi->sockhash, (char *)&s, sizeof(s));
if(entry) {
if(multi->socket_cb)
multi->socket_cb(conn->data, s, CURL_POLL_REMOVE,
multi->socket_userp,
entry->socketp);
/* now remove it from the socket hash */
sh_delentry(multi->sockhash, s);
}
}
}
/*
* add_next_timeout()
*

12
lib/multiif.h
View File

@ -83,4 +83,16 @@ struct curl_llist *Curl_multi_pipelining_server_bl(struct Curl_multi *multi);
/* Return the value of the CURLMOPT_MAX_TOTAL_CONNECTIONS option */
size_t Curl_multi_max_total_connections(struct Curl_multi *multi);
/*
* Curl_multi_closed()
*
* Used by the connect code to tell the multi_socket code that one of the
* sockets we were using have just been closed. This function will then
* remove it from the sockethash for this handle to make the multi_socket API
* behave properly, especially for the case when libcurl will create another
* socket again and it gets the same file descriptor number.
*/
void Curl_multi_closed(struct connectdata *conn, curl_socket_t s);
#endif /* HEADER_CURL_MULTIIF_H */