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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/acf.c | |
parent | 0163b4feca2fef964c8b0ed2ec7df4c55b934672 (diff) | |
download | libppp-android-4.4.4_r2.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/acf.c')
-rw-r--r-- | src/acf.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/acf.c b/src/acf.c new file mode 100644 index 0000000..6975f11 --- /dev/null +++ b/src/acf.c @@ -0,0 +1,116 @@ +/*- + * 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/acf.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 "defs.h" +#include "layer.h" +#include "timer.h" +#include "fsm.h" +#include "log.h" +#include "mbuf.h" +#include "acf.h" +#include "proto.h" +#include "throughput.h" +#include "lqr.h" +#include "hdlc.h" +#include "lcp.h" +#include "ccp.h" +#include "link.h" +#include "descriptor.h" +#include "async.h" +#include "physical.h" + +int +acf_WrapperOctets(struct lcp *lcp, u_short proto) +{ + return (proto == PROTO_LCP || lcp->his_acfcomp == 0) ? 2 : 0; +} + +static struct mbuf * +acf_LayerPush(struct bundle *b __unused, struct link *l, struct mbuf *bp, + int pri __unused, u_short *proto) +{ + const u_char cp[2] = { HDLC_ADDR, HDLC_UI }; + + if (*proto == PROTO_LCP || l->lcp.his_acfcomp == 0) { + bp = m_prepend(bp, cp, 2, 0); + m_settype(bp, MB_ACFOUT); + } + + return bp; +} + +static struct mbuf * +acf_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp, + u_short *proto __unused) +{ + struct physical *p = link2physical(l); + u_char cp[2]; + + if (!p) { + log_Printf(LogERROR, "Can't Pull an acf packet from a logical link\n"); + return bp; + } + + if (mbuf_View(bp, cp, 2) == 2) { + if (!p->link.lcp.want_acfcomp) { + /* We expect the packet not to be compressed */ + bp = mbuf_Read(bp, cp, 2); + if (cp[0] != HDLC_ADDR) { + p->hdlc.lqm.ifInErrors++; + p->hdlc.stats.badaddr++; + log_Printf(LogDEBUG, "acf_LayerPull: addr 0x%02x\n", cp[0]); + m_freem(bp); + return NULL; + } + if (cp[1] != HDLC_UI) { + p->hdlc.lqm.ifInErrors++; + p->hdlc.stats.badcommand++; + log_Printf(LogDEBUG, "acf_LayerPull: control 0x%02x\n", cp[1]); + m_freem(bp); + return NULL; + } + m_settype(bp, MB_ACFIN); + } else if (cp[0] == HDLC_ADDR && cp[1] == HDLC_UI) { + /* + * We can receive compressed packets, but the peer still sends + * uncompressed packets (or maybe this is a PROTO_LCP packet) ! + */ + bp = mbuf_Read(bp, cp, 2); + m_settype(bp, MB_ACFIN); + } + } + + return bp; +} + +struct layer acflayer = { LAYER_ACF, "acf", acf_LayerPush, acf_LayerPull }; |