Hi,
I am rather new to libevent and I am doing the following in a smaller server
application:
- Create an event loop listening for connections on a given port.
- If the first data sent by the client looks like an SSL client Hello, switch
the
connection to ssl, by installing a filter.
- process data as ususal (simply echo it)
When connecting to the server with telnet, all is working. When connecting to
the
server with the openssl s_client, I do get a successful SSL handshake, but
after that,
I can only write data to the server and never get anything back, and debug
output
shows, that clientRead is never called. What am I doing wrong?
This is the read callback installed by bufferevent_setcb:
static void clientInitialRead(struct bufferevent *bev, void *arg)
{
connState_t *conn = arg;
struct evbuffer *evi = bufferevent_get_input(bev);
struct evbuffer_iovec cont;
struct bufferevent *bevSsl;
evbuffer_peek(evi, -1, NULL, &cont, 1);
if (isSslClientHello(&cont, conn)) {
bevSsl =
bufferevent_openssl_filter_new(conn->global->mainEvents,
bev, conn->ssl, BUFFEREVENT_SSL_ACCEPTING,
BEV_OPT_DEFER_CALLBACKS);
if (!bevSsl) {
PA_WARNING("Error creating SSL filter bev");
return;
}
conn->bev = bevSsl;
bufferevent_setcb(bevSsl, clientRead, clientWrite, clientEvent,
conn);
bufferevent_setwatermark(bevSsl, EV_READ, 0, 16348);
bufferevent_enable(bevSsl, EV_READ|EV_WRITE);
} else {
clientRead(bev, arg);
}
}
And this is the "normal" read callback:
static void clientRead(struct bufferevent *bev, void *arg)
{
connState_t *conn = arg;
struct evbuffer *evi = bufferevent_get_input(bev);
struct evbuffer *evo = bufferevent_get_output(bev);
evbuffer_remove_buffer(evi, evo, evbuffer_get_length(evi));
}
--
Nils Rennebarth
Software Developer
Teldat packetalarm logo
Teldat Security GmbH
Moenchhaldenstr. 28
D-70191 Stuttgart
Tel: +49 711 900300 - 62
Fax: +49 711 900300 - 90
E-Mail: nils.renneba...@teldat.de
Location: GmbH Nuernberg, Local Court Nuernberg, HRB 25481 Managing Director:
Bernd Buettner
Teldat packetalarm banner
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