mx_channel_t *
mx_channel_create (mx_sock_session_t *session,
mx_sock_t *client, LIBSSH2_CHANNEL *channel)
{
mx_channel_t *mcp = malloc(sizeof(*mcp));
if (mcp == NULL)
return NULL;
bzero(mcp, sizeof(*mcp));
mcp->mc_id = ++mx_channel_id;
mcp->mc_session = session;
mcp->mc_channel = channel;
mcp->mc_rbufp = mx_buffer_create(0);
if (mx_mti(client)->mti_set_channel)
mx_mti(client)->mti_set_channel(client, session, mcp);
mcp->mc_client = client;
TAILQ_INSERT_HEAD(&session->mss_channels, mcp, mc_link);
MX_LOG("C%u: new channel, S%u, channel %p, client S%u",
mcp->mc_id, mcp->mc_session->mss_base.ms_id,
mcp->mc_channel, mcp->mc_client->ms_id);
return mcp;
}
static int
mx_channel_netconf_read_hello (mx_channel_t *mcp)
{
mx_buffer_t *mbp = mcp->mc_rbufp;
int len;
for (;;) {
if (mbp->mb_start + mbp->mb_len == mbp->mb_size) {
mx_buffer_t *newp = mx_buffer_create(0);
if (newp == NULL) {
mx_log("C%u cannot extend buffer", mcp->mc_id);
return TRUE;
}
mbp->mb_next = newp;
mbp = newp;
}
len = mx_channel_read(mcp, mbp->mb_data + mbp->mb_start + mbp->mb_len,
mbp->mb_size - (mbp->mb_start + mbp->mb_len));
if (libssh2_channel_eof(mcp->mc_channel)) {
DBG_POLL("C%u eof during read_hello", mcp->mc_id);
return FALSE;
}
if (len == LIBSSH2_ERROR_EAGAIN) {
/* Nothing to read, nothing to write; move on */
DBG_POLL("C%u is drained", mcp->mc_id);
#if 0
break;
#else
sleep(1);
continue;
#endif
}
if (len < 0)
return TRUE;
mbp->mb_len += len;
DBG_POLL("C%u read %d", mcp->mc_id, len);
if (mx_channel_netconf_has_marker(mcp)) {
mx_log("C%u found end-of-frame; len %lu, discarding",
mcp->mc_id, mcp->mc_rbufp->mb_len);
mbp->mb_len = mbp->mb_start = 0;
if (mbp->mb_next) {
mx_buffer_free(mbp->mb_next);
mbp->mb_next = NULL;
}
return TRUE;
}
}
return FALSE;
}
static mx_sock_t *
mx_forwarder_spawn (MX_TYPE_SPAWN_ARGS)
{
mx_sock_forwarder_t *msfp = malloc(sizeof(*msfp));
if (msfp == NULL)
return NULL;
bzero(msfp, sizeof(*msfp));
msfp->msf_base.ms_id = ++mx_sock_id;
msfp->msf_base.ms_type = MST_FORWARDER;
msfp->msf_base.ms_sock = sock;
msfp->msf_base.ms_sun = *sun;
msfp->msf_rbufp = mx_buffer_create(0);
/* XXX msl_request needs to move into the forwarder */
mslp->msl_request->mr_client = &msfp->msf_base;
mx_sock_session_t *mssp = mx_session(mslp->msl_request);
if (mssp == NULL) {
mx_log("%s could not open session", mx_sock_title(&msfp->msf_base));
/* XXX fail nicely */
return NULL;
}
mx_request_t *mrp = mslp->msl_request;
mx_channel_t *mcp;
mcp = mx_channel_direct_tcpip(mssp, &msfp->msf_base,
mrp->mr_desthost, mrp->mr_destport);
if (mcp == NULL) {
mx_log("%s could not open channel", mx_sock_title(&msfp->msf_base));
/* XXX close msfp */
return NULL;
}
return &msfp->msf_base;
}
