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author | Chia-chi Yeh <chiachi@android.com> | 2011-06-02 14:26:57 -0700 |
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committer | Chia-chi Yeh <chiachi@android.com> | 2011-06-02 14:26:57 -0700 |
commit | 706e567fc5ff6b79738a5f470e5aa7b2cae76459 (patch) | |
tree | 74d9a543d28679feb4c0a9cb485a00833ab83724 /src/proto.c | |
parent | 0163b4feca2fef964c8b0ed2ec7df4c55b934672 (diff) | |
download | libppp-kitkat-cts-dev.tar.gz |
libppp: import user space PPP implementation from FreeBSD 7.4-RELEASE.HEADandroid-sdk-support_r11android-sdk-4.4.2_r1.0.1android-sdk-4.4.2_r1android-cts-4.4_r4android-cts-4.4_r1android-cts-4.2_r2android-cts-4.2_r1android-4.4w_r1android-4.4_r1.2.0.1android-4.4_r1.2android-4.4_r1.1.0.1android-4.4_r1.1android-4.4_r1.0.1android-4.4_r1android-4.4_r0.9android-4.4_r0.8android-4.4_r0.7android-4.4.4_r2.0.1android-4.4.4_r2android-4.4.4_r1.0.1android-4.4.4_r1android-4.4.3_r1.1.0.1android-4.4.3_r1.1android-4.4.3_r1.0.1android-4.4.3_r1android-4.4.2_r2.0.1android-4.4.2_r2android-4.4.2_r1.0.1android-4.4.2_r1android-4.4.1_r1.0.1android-4.4.1_r1android-4.3_r3.1android-4.3_r3android-4.3_r2.3android-4.3_r2.2android-4.3_r2.1android-4.3_r2android-4.3_r1.1android-4.3_r1android-4.3_r0.9.1android-4.3_r0.9android-4.3.1_r1android-4.2_r1android-4.2.2_r1.2android-4.2.2_r1.1android-4.2.2_r1android-4.2.1_r1.2android-4.2.1_r1.1android-4.2.1_r1tools_r22.2tools_r22mastermainl-previewkitkat-wearkitkat-releasekitkat-mr2.2-releasekitkat-mr2.1-releasekitkat-mr2-releasekitkat-mr1.1-releasekitkat-mr1-releasekitkat-devkitkat-cts-releasekitkat-cts-devjb-mr2.0.0-releasejb-mr2.0-releasejb-mr2-releasejb-mr2-devjb-mr1.1-releasejb-mr1.1-dev-plus-aospjb-mr1.1-devjb-mr1-releasejb-mr1-dev-plus-aospjb-mr1-devidea133-weekly-releaseidea133
Change-Id: I78d2eb0fa010078b4cd131cadc39bf32cbc93986
Diffstat (limited to 'src/proto.c')
-rw-r--r-- | src/proto.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/proto.c b/src/proto.c new file mode 100644 index 0000000..051e8db --- /dev/null +++ b/src/proto.c @@ -0,0 +1,115 @@ +/*- + * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org> + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + * + * $FreeBSD: src/usr.sbin/ppp/proto.c,v 1.7.26.1 2010/12/21 17:10:29 kensmith Exp $ + */ + +#include <sys/types.h> + +#include <stdio.h> +#include <termios.h> + +#include "layer.h" +#include "acf.h" +#include "defs.h" +#include "log.h" +#include "timer.h" +#include "fsm.h" +#include "mbuf.h" +#include "proto.h" +#include "throughput.h" +#include "lqr.h" +#include "hdlc.h" +#include "lcp.h" +#include "ccp.h" +#include "link.h" + +int +proto_WrapperOctets(struct lcp *lcp, u_short proto) +{ + return (lcp->his_protocomp && !(proto & 0xff00)) ? 1 : 2; +} + +struct mbuf * +proto_Prepend(struct mbuf *bp, u_short proto, unsigned comp, int extra) +{ + u_char cp[2]; + + cp[0] = proto >> 8; + cp[1] = proto & 0xff; + + if (comp && cp[0] == 0) + bp = m_prepend(bp, cp + 1, 1, extra); + else + bp = m_prepend(bp, cp, 2, extra); + + return bp; +} + +static struct mbuf * +proto_LayerPush(struct bundle *b __unused, struct link *l, struct mbuf *bp, + int pri __unused, u_short *proto) +{ + log_Printf(LogDEBUG, "proto_LayerPush: Using 0x%04x\n", *proto); + bp = proto_Prepend(bp, *proto, l->lcp.his_protocomp, + acf_WrapperOctets(&l->lcp, *proto)); + m_settype(bp, MB_PROTOOUT); + link_ProtocolRecord(l, *proto, PROTO_OUT); + + return bp; +} + +static struct mbuf * +proto_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp, + u_short *proto) +{ + u_char cp[2]; + size_t got; + + if ((got = mbuf_View(bp, cp, 2)) == 0) { + m_freem(bp); + return NULL; + } + + *proto = cp[0]; + if (!(*proto & 1)) { + if (got == 1) { + m_freem(bp); + return NULL; + } + bp = mbuf_Read(bp, cp, 2); + *proto = (*proto << 8) | cp[1]; + } else + bp = mbuf_Read(bp, cp, 1); + + log_Printf(LogDEBUG, "proto_LayerPull: unknown -> 0x%04x\n", *proto); + m_settype(bp, MB_PROTOIN); + link_ProtocolRecord(l, *proto, PROTO_IN); + + return bp; +} + +struct layer protolayer = + { LAYER_PROTO, "proto", proto_LayerPush, proto_LayerPull }; |