*  - OUR_V2_WINSIZE is the maximum window size we present on SSH2
 *    channels.
 */

#define SSH1_BUFFER_LIMIT 32768
#define SSH_MAX_BACKLOG 32768
#define OUR_V2_WINSIZE 16384
#define OUR_V2_MAXPKT 0x4000UL

const static struct ssh_signkey *hostkey_algs[] = { &ssh_rsa, &ssh_dss };

static void *nullmac_make_context(void)
{
    return NULL;
}

	c->v.v2.remmaxpkt = pktsize;
	bufchain_init(&c->v.v2.outbuffer);
	add234(ssh->channels, c);
	pktout = ssh2_pkt_init(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
	ssh2_pkt_adduint32(pktout, c->remoteid);
	ssh2_pkt_adduint32(pktout, c->localid);
	ssh2_pkt_adduint32(pktout, c->v.v2.locwindow);
	ssh2_pkt_adduint32(pktout, OUR_V2_MAXPKT);	/* our max pkt size */
	ssh2_pkt_send(ssh, pktout);
    }
}

/*
 * Handle the SSH2 userauth and connection layers.
 */

	ssh->mainchan->ssh = ssh;
	ssh->mainchan->localid = alloc_channel_id(ssh);
	s->pktout = ssh2_pkt_init(SSH2_MSG_CHANNEL_OPEN);
	ssh2_pkt_addstring(s->pktout, "session");
	ssh2_pkt_adduint32(s->pktout, ssh->mainchan->localid);
	ssh->mainchan->v.v2.locwindow = OUR_V2_WINSIZE;
	ssh2_pkt_adduint32(s->pktout, ssh->mainchan->v.v2.locwindow);/* our window size */
	ssh2_pkt_adduint32(s->pktout, OUR_V2_MAXPKT);    /* our max pkt size */
	ssh2_pkt_send(ssh, s->pktout);
	crWaitUntilV(pktin);
	if (pktin->type != SSH2_MSG_CHANNEL_OPEN_CONFIRMATION) {
	    bombout(("Server refused to open a session"));
	    crStopV;
	    /* FIXME: error data comes back in FAILURE packet */
	}

		    PKT_END);
    } else {
	pktout = ssh2_pkt_init(SSH2_MSG_CHANNEL_OPEN);
	ssh2_pkt_addstring(pktout, "direct-tcpip");
	ssh2_pkt_adduint32(pktout, c->localid);
	c->v.v2.locwindow = OUR_V2_WINSIZE;
	ssh2_pkt_adduint32(pktout, c->v.v2.locwindow);/* our window size */
	ssh2_pkt_adduint32(pktout, OUR_V2_MAXPKT);      /* our max pkt size */
	ssh2_pkt_addstring(pktout, hostname);
	ssh2_pkt_adduint32(pktout, port);
	/*
	 * We make up values for the originator data; partly it's
	 * too much hassle to keep track, and partly I'm not
	 * convinced the server should be told details like that
	 * about my local network configuration.