diff options
Diffstat (limited to 'slirp/src/ip_output.c')
| m--------- | slirp | 0 | ||||
| -rw-r--r-- | slirp/src/ip_output.c | 170 |
2 files changed, 0 insertions, 170 deletions
diff --git a/slirp b/slirp new file mode 160000 +Subproject 59a1b1f165458c2acb7ff0525b543945f741622 diff --git a/slirp/src/ip_output.c b/slirp/src/ip_output.c deleted file mode 100644 index 8560197cf6..0000000000 --- a/slirp/src/ip_output.c +++ /dev/null @@ -1,170 +0,0 @@ -/* SPDX-License-Identifier: BSD-3-Clause */ -/* - * Copyright (c) 1982, 1986, 1988, 1990, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)ip_output.c 8.3 (Berkeley) 1/21/94 - * ip_output.c,v 1.9 1994/11/16 10:17:10 jkh Exp - */ - -/* - * Changes and additions relating to SLiRP are - * Copyright (c) 1995 Danny Gasparovski. - */ - -#include "slirp.h" - -/* Number of packets queued before we start sending - * (to prevent allocing too many mbufs) */ -#define IF_THRESH 10 - -/* - * IP output. The packet in mbuf chain m contains a skeletal IP - * header (with len, off, ttl, proto, tos, src, dst). - * The mbuf chain containing the packet will be freed. - * The mbuf opt, if present, will not be freed. - */ -int -ip_output(struct socket *so, struct mbuf *m0) -{ - Slirp *slirp = m0->slirp; - register struct ip *ip; - register struct mbuf *m = m0; - register int hlen = sizeof(struct ip ); - int len, off, error = 0; - - DEBUG_CALL("ip_output"); - DEBUG_ARG("so = %p", so); - DEBUG_ARG("m0 = %p", m0); - - ip = mtod(m, struct ip *); - /* - * Fill in IP header. - */ - ip->ip_v = IPVERSION; - ip->ip_off &= IP_DF; - ip->ip_id = htons(slirp->ip_id++); - ip->ip_hl = hlen >> 2; - - /* - * If small enough for interface, can just send directly. - */ - if ((uint16_t)ip->ip_len <= IF_MTU) { - ip->ip_len = htons((uint16_t)ip->ip_len); - ip->ip_off = htons((uint16_t)ip->ip_off); - ip->ip_sum = 0; - ip->ip_sum = cksum(m, hlen); - - if_output(so, m); - goto done; - } - - /* - * Too large for interface; fragment if possible. - * Must be able to put at least 8 bytes per fragment. - */ - if (ip->ip_off & IP_DF) { - error = -1; - goto bad; - } - - len = (IF_MTU - hlen) &~ 7; /* ip databytes per packet */ - if (len < 8) { - error = -1; - goto bad; - } - - { - int mhlen, firstlen = len; - struct mbuf **mnext = &m->m_nextpkt; - - /* - * Loop through length of segment after first fragment, - * make new header and copy data of each part and link onto chain. - */ - m0 = m; - mhlen = sizeof (struct ip); - for (off = hlen + len; off < (uint16_t)ip->ip_len; off += len) { - register struct ip *mhip; - m = m_get(slirp); - if (m == NULL) { - error = -1; - goto sendorfree; - } - m->m_data += IF_MAXLINKHDR; - mhip = mtod(m, struct ip *); - *mhip = *ip; - - m->m_len = mhlen; - mhip->ip_off = ((off - hlen) >> 3) + (ip->ip_off & ~IP_MF); - if (ip->ip_off & IP_MF) - mhip->ip_off |= IP_MF; - if (off + len >= (uint16_t)ip->ip_len) - len = (uint16_t)ip->ip_len - off; - else - mhip->ip_off |= IP_MF; - mhip->ip_len = htons((uint16_t)(len + mhlen)); - - if (m_copy(m, m0, off, len) < 0) { - error = -1; - goto sendorfree; - } - - mhip->ip_off = htons((uint16_t)mhip->ip_off); - mhip->ip_sum = 0; - mhip->ip_sum = cksum(m, mhlen); - *mnext = m; - mnext = &m->m_nextpkt; - } - /* - * Update first fragment by trimming what's been copied out - * and updating header, then send each fragment (in order). - */ - m = m0; - m_adj(m, hlen + firstlen - (uint16_t)ip->ip_len); - ip->ip_len = htons((uint16_t)m->m_len); - ip->ip_off = htons((uint16_t)(ip->ip_off | IP_MF)); - ip->ip_sum = 0; - ip->ip_sum = cksum(m, hlen); -sendorfree: - for (m = m0; m; m = m0) { - m0 = m->m_nextpkt; - m->m_nextpkt = NULL; - if (error == 0) - if_output(so, m); - else - m_free(m); - } - } - -done: - return (error); - -bad: - m_free(m0); - goto done; -} |