int virNetServerClientInit(virNetServerClientPtr client)
{
virObjectLock(client);
#if WITH_GNUTLS
if (!client->tlsCtxt) {
#endif
/* Plain socket, so prepare to read first message */
if (virNetServerClientRegisterEvent(client) < 0)
goto error;
#if WITH_GNUTLS
} else {
int ret;
if (!(client->tls = virNetTLSSessionNew(client->tlsCtxt,
NULL)))
goto error;
virNetSocketSetTLSSession(client->sock,
client->tls);
/* Begin the TLS handshake. */
ret = virNetTLSSessionHandshake(client->tls);
if (ret == 0) {
/* Unlikely, but ... Next step is to check the certificate. */
if (virNetServerClientCheckAccess(client) < 0)
goto error;
/* Handshake & cert check OK, so prepare to read first message */
if (virNetServerClientRegisterEvent(client) < 0)
goto error;
} else if (ret > 0) {
/* Most likely, need to do more handshake data */
if (virNetServerClientRegisterEvent(client) < 0)
goto error;
} else {
goto error;
}
}
#endif
virObjectUnlock(client);
return 0;
error:
client->wantClose = true;
virObjectUnlock(client);
return -1;
}
int virNetClientSetTLSSession(virNetClientPtr client,
virNetTLSContextPtr tls)
{
int ret;
char buf[1];
int len;
struct pollfd fds[1];
sigset_t oldmask, blockedsigs;
sigemptyset (&blockedsigs);
#ifdef SIGWINCH
sigaddset (&blockedsigs, SIGWINCH);
#endif
#ifdef SIGCHLD
sigaddset (&blockedsigs, SIGCHLD);
#endif
sigaddset (&blockedsigs, SIGPIPE);
virNetClientLock(client);
if (!(client->tls = virNetTLSSessionNew(tls,
client->hostname)))
goto error;
virNetSocketSetTLSSession(client->sock, client->tls);
for (;;) {
ret = virNetTLSSessionHandshake(client->tls);
if (ret < 0)
goto error;
if (ret == 0)
break;
fds[0].fd = virNetSocketGetFD(client->sock);
fds[0].revents = 0;
if (virNetTLSSessionGetHandshakeStatus(client->tls) ==
VIR_NET_TLS_HANDSHAKE_RECVING)
fds[0].events = POLLIN;
else
fds[0].events = POLLOUT;
/* Block SIGWINCH from interrupting poll in curses programs,
* then restore the original signal mask again immediately
* after the call (RHBZ#567931). Same for SIGCHLD and SIGPIPE
* at the suggestion of Paolo Bonzini and Daniel Berrange.
*/
ignore_value(pthread_sigmask(SIG_BLOCK, &blockedsigs, &oldmask));
repoll:
ret = poll(fds, ARRAY_CARDINALITY(fds), -1);
if (ret < 0 && errno == EAGAIN)
goto repoll;
ignore_value(pthread_sigmask(SIG_BLOCK, &oldmask, NULL));
}
ret = virNetTLSContextCheckCertificate(tls, client->tls);
if (ret < 0)
goto error;
/* At this point, the server is verifying _our_ certificate, IP address,
* etc. If we make the grade, it will send us a '\1' byte.
*/
fds[0].fd = virNetSocketGetFD(client->sock);
fds[0].revents = 0;
fds[0].events = POLLIN;
/* Block SIGWINCH from interrupting poll in curses programs */
ignore_value(pthread_sigmask(SIG_BLOCK, &blockedsigs, &oldmask));
repoll2:
ret = poll(fds, ARRAY_CARDINALITY(fds), -1);
if (ret < 0 && errno == EAGAIN)
goto repoll2;
ignore_value(pthread_sigmask(SIG_BLOCK, &oldmask, NULL));
len = virNetTLSSessionRead(client->tls, buf, 1);
if (len < 0 && errno != ENOMSG) {
virReportSystemError(errno, "%s",
_("Unable to read TLS confirmation"));
goto error;
}
if (len != 1 || buf[0] != '\1') {
virNetError(VIR_ERR_RPC, "%s",
_("server verification (of our certificate or IP "
"address) failed"));
goto error;
}
virNetClientUnlock(client);
return 0;
error:
virNetTLSSessionFree(client->tls);
client->tls = NULL;
virNetClientUnlock(client);
return -1;
}