slirp: Drop dead code

After all its years inside the qemu tree, there is no point in keeping
the dead code paths of slirp. This patch is a first round of removing
usually commented out code parts. More cleanups need to follow (and
maybe finally a proper reindention).

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 2 insertions, 75 deletions

diff --git a/slirp/tcp_output.c b/slirp/tcp_output.c
index 5daf58e..a11f3da 100644
--- a/slirp/tcp_output.c
+++ b/slirp/tcp_output.c
@@ -272,39 +272,9 @@ send:
 			mss = htons((u_int16_t) tcp_mss(tp, 0));
 			memcpy((caddr_t)(opt + 2), (caddr_t)&mss, sizeof(mss));
 			optlen = 4;
-
-/*			if ((tp->t_flags & TF_REQ_SCALE) &&
- *			    ((flags & TH_ACK) == 0 ||
- *			    (tp->t_flags & TF_RCVD_SCALE))) {
- *				*((u_int32_t *) (opt + optlen)) = htonl(
- *					TCPOPT_NOP << 24 |
- *					TCPOPT_WINDOW << 16 |
- *					TCPOLEN_WINDOW << 8 |
- *					tp->request_r_scale);
- *				optlen += 4;
- *			}
- */
 		}
  	}
 
- 	/*
-	 * Send a timestamp and echo-reply if this is a SYN and our side
-	 * wants to use timestamps (TF_REQ_TSTMP is set) or both our side
-	 * and our peer have sent timestamps in our SYN's.
- 	 */
-/* 	if ((tp->t_flags & (TF_REQ_TSTMP|TF_NOOPT)) == TF_REQ_TSTMP &&
- *	     (flags & TH_RST) == 0 &&
- *	    ((flags & (TH_SYN|TH_ACK)) == TH_SYN ||
- *	     (tp->t_flags & TF_RCVD_TSTMP))) {
- *		u_int32_t *lp = (u_int32_t *)(opt + optlen);
- *
- *		/ * Form timestamp option as shown in appendix A of RFC 1323. *  /
- *		*lp++ = htonl(TCPOPT_TSTAMP_HDR);
- *		*lp++ = htonl(tcp_now);
- *		*lp   = htonl(tp->ts_recent);
- *		optlen += TCPOLEN_TSTAMP_APPA;
- *	}
- */
  	hdrlen += optlen;
 
 	/*
@@ -334,28 +304,15 @@ send:
 
 		m = m_get();
 		if (m == NULL) {
-/*			error = ENOBUFS; */
 			error = 1;
 			goto out;
 		}
 		m->m_data += IF_MAXLINKHDR;
 		m->m_len = hdrlen;
 
-		/*
-		 * This will always succeed, since we make sure our mbufs
-		 * are big enough to hold one MSS packet + header + ... etc.
-		 */
-/*		if (len <= MHLEN - hdrlen - max_linkhdr) { */
-
-			sbcopy(&so->so_snd, off, (int) len, mtod(m, caddr_t) + hdrlen);
-			m->m_len += len;
+		sbcopy(&so->so_snd, off, (int) len, mtod(m, caddr_t) + hdrlen);
+		m->m_len += len;
 
-/*		} else {
- *			m->m_next = m_copy(so->so_snd.sb_mb, off, (int) len);
- *			if (m->m_next == 0)
- *				len = 0;
- *		}
- */
 		/*
 		 * If we're sending everything we've got, set PUSH.
 		 * (This will keep happy those implementations which only
@@ -376,7 +333,6 @@ send:
 
 		m = m_get();
 		if (m == NULL) {
-/*			error = ENOBUFS; */
 			error = 1;
 			goto out;
 		}
@@ -433,10 +389,6 @@ send:
 
 	if (SEQ_GT(tp->snd_up, tp->snd_una)) {
 		ti->ti_urp = htons((u_int16_t)(tp->snd_up - ntohl(ti->ti_seq)));
-#ifdef notdef
-	if (SEQ_GT(tp->snd_up, tp->snd_nxt)) {
-		ti->ti_urp = htons((u_int16_t)(tp->snd_up - tp->snd_nxt));
-#endif
 		ti->ti_flags |= TH_URG;
 	} else
 		/*
@@ -523,32 +475,10 @@ send:
 	((struct ip *)ti)->ip_ttl = IPDEFTTL;
 	((struct ip *)ti)->ip_tos = so->so_iptos;
 
-/* #if BSD >= 43 */
-	/* Don't do IP options... */
-/*	error = ip_output(m, tp->t_inpcb->inp_options, &tp->t_inpcb->inp_route,
- *	    so->so_options & SO_DONTROUTE, 0);
- */
 	error = ip_output(so, m);
-
-/* #else
- *	error = ip_output(m, (struct mbuf *)0, &tp->t_inpcb->inp_route,
- *	    so->so_options & SO_DONTROUTE);
- * #endif
- */
     }
 	if (error) {
 out:
-/*		if (error == ENOBUFS) {
- *			tcp_quench(tp->t_inpcb, 0);
- *			return (0);
- *		}
- */
-/*		if ((error == EHOSTUNREACH || error == ENETDOWN)
- *		    && TCPS_HAVERCVDSYN(tp->t_state)) {
- *			tp->t_softerror = error;
- *			return (0);
- *		}
- */
 		return (error);
 	}
 	STAT(tcpstat.tcps_sndtotal++);
@@ -574,9 +504,6 @@ tcp_setpersist(struct tcpcb *tp)
 {
     int t = ((tp->t_srtt >> 2) + tp->t_rttvar) >> 1;
 
-/*	if (tp->t_timer[TCPT_REXMT])
- *		panic("tcp_output REXMT");
- */
 	/*
 	 * Start/restart persistence timer.
 	 */