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Diffstat (limited to 'slirp/src/tcpip.h')
| -rw-r--r-- | slirp/src/tcpip.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/slirp/src/tcpip.h b/slirp/src/tcpip.h new file mode 100644 index 000000000..a0fb2282f --- /dev/null +++ b/slirp/src/tcpip.h @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: BSD-3-Clause */ +/* + * Copyright (c) 1982, 1986, 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. + * + * @(#)tcpip.h 8.1 (Berkeley) 6/10/93 + * tcpip.h,v 1.3 1994/08/21 05:27:40 paul Exp + */ + +#ifndef TCPIP_H +#define TCPIP_H + +/* + * Tcp+ip header, after ip options removed. + */ +struct tcpiphdr { + struct mbuf_ptr ih_mbuf; /* backpointer to mbuf */ + union { + struct { + struct in_addr ih_src; /* source internet address */ + struct in_addr ih_dst; /* destination internet address */ + uint8_t ih_x1; /* (unused) */ + uint8_t ih_pr; /* protocol */ + } ti_i4; + struct { + struct in6_addr ih_src; + struct in6_addr ih_dst; + uint8_t ih_x1; + uint8_t ih_nh; + } ti_i6; + } ti; + uint16_t ti_x0; + uint16_t ti_len; /* protocol length */ + struct tcphdr ti_t; /* tcp header */ +}; +#define ti_mbuf ih_mbuf.mptr +#define ti_pr ti.ti_i4.ih_pr +#define ti_src ti.ti_i4.ih_src +#define ti_dst ti.ti_i4.ih_dst +#define ti_src6 ti.ti_i6.ih_src +#define ti_dst6 ti.ti_i6.ih_dst +#define ti_nh6 ti.ti_i6.ih_nh +#define ti_sport ti_t.th_sport +#define ti_dport ti_t.th_dport +#define ti_seq ti_t.th_seq +#define ti_ack ti_t.th_ack +#define ti_x2 ti_t.th_x2 +#define ti_off ti_t.th_off +#define ti_flags ti_t.th_flags +#define ti_win ti_t.th_win +#define ti_sum ti_t.th_sum +#define ti_urp ti_t.th_urp + +#define tcpiphdr2qlink(T) \ + ((struct qlink *)(((char *)(T)) - sizeof(struct qlink))) +#define qlink2tcpiphdr(Q) \ + ((struct tcpiphdr *)(((char *)(Q)) + sizeof(struct qlink))) +#define tcpiphdr_next(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->next) +#define tcpiphdr_prev(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->prev) +#define tcpfrag_list_first(T) qlink2tcpiphdr((T)->seg_next) +#define tcpfrag_list_end(F, T) (tcpiphdr2qlink(F) == (struct qlink *)(T)) +#define tcpfrag_list_empty(T) ((T)->seg_next == (struct tcpiphdr *)(T)) + +/* This is the difference between the size of a tcpiphdr structure, and the + * size of actual ip+tcp headers, rounded up since we need to align data. */ +#define TCPIPHDR_DELTA \ + (MAX(0, ((int) sizeof(struct tcpiphdr) - (int) sizeof(struct ip) - \ + (int) sizeof(struct tcphdr) + 3) & \ + ~3)) + +/* + * Just a clean way to get to the first byte + * of the packet + */ +struct tcpiphdr_2 { + struct tcpiphdr dummy; + char first_char; +}; + +#endif |