[85a0f07] | 1 | /* |
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| 2 | * if_ppp.c - Point-to-Point Protocol (PPP) Asynchronous driver. |
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| 3 | * |
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| 4 | * Copyright (c) 1989 Carnegie Mellon University. |
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| 5 | * All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms are permitted |
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| 8 | * provided that the above copyright notice and this paragraph are |
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| 9 | * duplicated in all such forms and that any documentation, |
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| 10 | * advertising materials, and other materials related to such |
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| 11 | * distribution and use acknowledge that the software was developed |
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| 12 | * by Carnegie Mellon University. The name of the |
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| 13 | * University may not be used to endorse or promote products derived |
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| 14 | * from this software without specific prior written permission. |
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| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 18 | * |
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| 19 | * Drew D. Perkins |
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| 20 | * Carnegie Mellon University |
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| 21 | * 4910 Forbes Ave. |
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| 22 | * Pittsburgh, PA 15213 |
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| 23 | * (412) 268-8576 |
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| 24 | * ddp@andrew.cmu.edu |
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| 25 | * |
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| 26 | * Based on: |
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| 27 | * @(#)if_sl.c 7.6.1.2 (Berkeley) 2/15/89 |
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| 28 | * |
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| 29 | * Copyright (c) 1987 Regents of the University of California. |
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| 30 | * All rights reserved. |
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| 31 | * |
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| 32 | * Redistribution and use in source and binary forms are permitted |
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| 33 | * provided that the above copyright notice and this paragraph are |
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| 34 | * duplicated in all such forms and that any documentation, |
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| 35 | * advertising materials, and other materials related to such |
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| 36 | * distribution and use acknowledge that the software was developed |
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| 37 | * by the University of California, Berkeley. The name of the |
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| 38 | * University may not be used to endorse or promote products derived |
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| 39 | * from this software without specific prior written permission. |
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| 40 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 41 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 42 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 43 | * |
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| 44 | * Serial Line interface |
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| 45 | * |
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| 46 | * Rick Adams |
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| 47 | * Center for Seismic Studies |
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| 48 | * 1300 N 17th Street, Suite 1450 |
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| 49 | * Arlington, Virginia 22209 |
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| 50 | * (703)276-7900 |
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| 51 | * rick@seismo.ARPA |
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| 52 | * seismo!rick |
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| 53 | * |
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| 54 | * Pounded on heavily by Chris Torek (chris@mimsy.umd.edu, umcp-cs!chris). |
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| 55 | * Converted to 4.3BSD Beta by Chris Torek. |
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| 56 | * Other changes made at Berkeley, based in part on code by Kirk Smith. |
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| 57 | * |
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| 58 | * Converted to 4.3BSD+ 386BSD by Brad Parker (brad@cayman.com) |
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| 59 | * Added VJ tcp header compression; more unified ioctls |
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| 60 | * |
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| 61 | * Extensively modified by Paul Mackerras (paulus@cs.anu.edu.au). |
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| 62 | * Cleaned up a lot of the mbuf-related code to fix bugs that |
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| 63 | * caused system crashes and packet corruption. Changed pppstart |
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| 64 | * so that it doesn't just give up with a collision if the whole |
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| 65 | * packet doesn't fit in the output ring buffer. |
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| 66 | * |
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| 67 | * Added priority queueing for interactive IP packets, following |
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| 68 | * the model of if_sl.c, plus hooks for bpf. |
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| 69 | * Paul Mackerras (paulus@cs.anu.edu.au). |
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| 70 | */ |
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| 71 | |
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| 72 | /* $Id$ */ |
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| 73 | /* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */ |
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| 74 | /* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */ |
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| 75 | |
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| 76 | #include "ppp.h" |
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| 77 | #if NPPP > 0 |
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| 78 | |
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[0286b9f] | 79 | #include <termios.h> |
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| 80 | #include <rtems/termiostypes.h> |
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| 81 | #include <rtems/rtems_bsdnet.h> |
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[85a0f07] | 82 | #include <sys/param.h> |
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| 83 | #include <sys/systm.h> |
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| 84 | #include <sys/proc.h> |
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| 85 | #include <sys/mbuf.h> |
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| 86 | #include <sys/socket.h> |
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| 87 | #include <sys/ioctl.h> |
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| 88 | #include <sys/kernel.h> |
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| 89 | #include <sys/time.h> |
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| 90 | #include <sys/malloc.h> |
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| 91 | |
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| 92 | #include <net/if.h> |
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| 93 | #include <net/if_types.h> |
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| 94 | #include <net/netisr.h> |
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| 95 | #include <net/route.h> |
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| 96 | #ifdef PPP_FILTER |
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| 97 | #include <net/bpf.h> |
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| 98 | #endif |
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| 99 | |
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[0286b9f] | 100 | #if INET |
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[85a0f07] | 101 | #include <netinet/in.h> |
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| 102 | #include <netinet/in_systm.h> |
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| 103 | #include <netinet/in_var.h> |
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| 104 | #include <netinet/ip.h> |
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| 105 | #endif |
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| 106 | |
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[0286b9f] | 107 | #include "bpfilter.h" |
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[85a0f07] | 108 | #if NBPFILTER > 0 |
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| 109 | #include <net/bpf.h> |
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| 110 | #endif |
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| 111 | |
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| 112 | #ifdef VJC |
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| 113 | #include <net/pppcompress.h> |
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| 114 | #endif |
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| 115 | |
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| 116 | #include <net/ppp_defs.h> |
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| 117 | #include <net/if_ppp.h> |
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| 118 | #include <net/if_pppvar.h> |
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| 119 | #include <machine/cpu.h> |
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| 120 | |
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| 121 | #define splsoftnet splnet |
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| 122 | |
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| 123 | #ifdef PPP_COMPRESS |
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| 124 | #define PACKETPTR struct mbuf * |
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| 125 | #include <net/ppp-comp.h> |
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| 126 | #endif |
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[0286b9f] | 127 | |
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[85a0f07] | 128 | static int pppsioctl __P((struct ifnet *, int, caddr_t)); |
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| 129 | static void ppp_requeue __P((struct ppp_softc *)); |
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[78d6a50] | 130 | #ifdef PPP_COMPRESS |
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[85a0f07] | 131 | static void ppp_ccp __P((struct ppp_softc *, struct mbuf *m, int rcvd)); |
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| 132 | static void ppp_ccp_closed __P((struct ppp_softc *)); |
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[78d6a50] | 133 | #endif |
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[0286b9f] | 134 | static struct mbuf *ppp_inproc __P((struct ppp_softc *, struct mbuf *)); |
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[85a0f07] | 135 | static void pppdumpm __P((struct mbuf *m0)); |
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| 136 | |
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| 137 | /* |
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| 138 | * Some useful mbuf macros not in mbuf.h. |
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| 139 | */ |
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| 140 | #define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) |
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| 141 | |
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| 142 | #define M_DATASTART(m) \ |
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| 143 | (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ |
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| 144 | (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) |
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| 145 | |
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| 146 | #define M_DATASIZE(m) \ |
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| 147 | (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ |
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| 148 | (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) |
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| 149 | |
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| 150 | /* |
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| 151 | * We steal two bits in the mbuf m_flags, to mark high-priority packets |
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| 152 | * for output, and received packets following lost/corrupted packets. |
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| 153 | */ |
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| 154 | #define M_HIGHPRI 0x2000 /* output packet for sc_fastq */ |
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| 155 | #define M_ERRMARK 0x4000 /* steal a bit in mbuf m_flags */ |
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| 156 | |
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| 157 | |
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| 158 | #ifdef PPP_COMPRESS |
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| 159 | /* |
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| 160 | * List of compressors we know about. |
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| 161 | * We leave some space so maybe we can modload compressors. |
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| 162 | */ |
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| 163 | |
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| 164 | extern struct compressor ppp_bsd_compress; |
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| 165 | extern struct compressor ppp_deflate, ppp_deflate_draft; |
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| 166 | |
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| 167 | struct compressor *ppp_compressors[8] = { |
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| 168 | #if DO_BSD_COMPRESS |
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| 169 | &ppp_bsd_compress, |
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| 170 | #endif |
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| 171 | #if DO_DEFLATE |
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| 172 | &ppp_deflate, |
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| 173 | &ppp_deflate_draft, |
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| 174 | #endif |
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| 175 | NULL |
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| 176 | }; |
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| 177 | #endif /* PPP_COMPRESS */ |
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| 178 | |
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[0286b9f] | 179 | extern struct ifqueue ipintrq; |
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| 180 | static struct timeval ppp_time; |
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| 181 | |
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| 182 | TEXT_SET(pseudo_set, ppp_rxdaemon); |
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| 183 | |
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| 184 | |
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| 185 | static rtems_task ppp_rxdaemon(rtems_task_argument arg) |
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| 186 | { |
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| 187 | rtems_event_set events; |
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| 188 | rtems_interrupt_level level; |
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| 189 | struct ppp_softc *sc = (struct ppp_softc *)arg; |
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| 190 | struct mbuf *mp = (struct mbuf *)0; |
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| 191 | struct mbuf *m; |
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| 192 | |
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| 193 | /* enter processing loop */ |
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| 194 | while ( 1 ) { |
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| 195 | /* wait for event */ |
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| 196 | rtems_event_receive(RX_PACKET|RX_MBUF|RX_EMPTY,RTEMS_WAIT|RTEMS_EVENT_ANY,RTEMS_NO_TIMEOUT,&events); |
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| 197 | if ( events & RX_EMPTY ) { |
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| 198 | printf("RX: QUEUE is EMPTY\n"); |
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| 199 | events &= ~RX_EMPTY; |
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| 200 | } |
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| 201 | |
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| 202 | if ( events ) { |
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| 203 | /* get the network semaphore */ |
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| 204 | rtems_bsdnet_semaphore_obtain(); |
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| 205 | |
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| 206 | /* check to see if new packet was received */ |
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| 207 | if ( events & RX_PACKET ) { |
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| 208 | /* get received packet mbuf chain */ |
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| 209 | rtems_interrupt_disable(level); |
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| 210 | IF_DEQUEUE(&sc->sc_rawq, m); |
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| 211 | rtems_interrupt_enable(level); |
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| 212 | |
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| 213 | /* ensure packet was retrieved */ |
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| 214 | if ( m != (struct mbuf *)0 ) { |
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| 215 | /* process the received packet */ |
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| 216 | mp = ppp_inproc(sc, m); |
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| 217 | } |
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| 218 | } |
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| 219 | |
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| 220 | /* allocate a new mbuf to replace one */ |
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| 221 | if ( mp == NULL ) { |
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| 222 | pppallocmbuf(sc, &mp); |
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| 223 | } |
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| 224 | |
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| 225 | /* place mbuf on freeq */ |
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| 226 | rtems_interrupt_disable(level); |
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| 227 | IF_ENQUEUE(&sc->sc_freeq, mp); |
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| 228 | rtems_interrupt_enable(level); |
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| 229 | mp = (struct mbuf *)0; |
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| 230 | |
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| 231 | /* release the network semaphore */ |
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| 232 | rtems_bsdnet_semaphore_release(); |
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| 233 | |
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| 234 | /* check to see if queue is empty */ |
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| 235 | if ( sc->sc_rawq.ifq_head ) { |
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| 236 | /* queue is not empty - post another event */ |
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| 237 | rtems_event_send(sc->sc_rxtask, RX_PACKET); |
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| 238 | } |
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| 239 | } |
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| 240 | } |
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| 241 | } |
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| 242 | |
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| 243 | static rtems_task ppp_txdaemon(rtems_task_argument arg) |
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| 244 | { |
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| 245 | rtems_event_set events; |
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| 246 | char cFrame = (char )PPP_FLAG; |
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| 247 | int iprocess = (int )0; |
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| 248 | struct ppp_softc *sc = (struct ppp_softc *)arg; |
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| 249 | struct mbuf *mp; |
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| 250 | struct mbuf *mf; |
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| 251 | struct mbuf *m; |
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| 252 | struct rtems_termios_tty *tp; |
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| 253 | |
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| 254 | /* enter processing loop */ |
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| 255 | while ( 1 ) { |
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| 256 | /* wait for event */ |
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| 257 | rtems_event_receive(TX_PACKET|TX_TRANSMIT,RTEMS_WAIT|RTEMS_EVENT_ANY,RTEMS_NO_TIMEOUT,&events); |
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| 258 | if ( events & TX_TRANSMIT ) { |
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| 259 | /* received event from interrupt handler - free current mbuf */ |
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| 260 | rtems_bsdnet_semaphore_obtain(); |
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| 261 | m_freem(sc->sc_outm); |
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| 262 | rtems_bsdnet_semaphore_release(); |
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| 263 | |
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| 264 | /* chain is done - clear the values */ |
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| 265 | sc->sc_outm = (struct mbuf *)0; |
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| 266 | sc->sc_outmc = (struct mbuf *)0; |
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| 267 | |
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| 268 | /* now set flag to fake receive of TX_PACKET event */ |
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| 269 | /* this will check to see if we have any pending packets */ |
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| 270 | events |= TX_PACKET; |
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| 271 | } |
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| 272 | |
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| 273 | /* received event from pppasyncstart */ |
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| 274 | if ( events & TX_PACKET ) { |
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| 275 | /* ensure we are not busy */ |
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| 276 | if ( sc->sc_outm == (struct mbuf *)0 ) { |
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| 277 | /* try dequeuing a packet */ |
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| 278 | sc->sc_outm = ppp_dequeue(sc); |
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| 279 | if ( sc->sc_outm == NULL ) { |
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| 280 | /* clear output flags */ |
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| 281 | sc->sc_outflag = 0; |
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| 282 | sc->sc_if.if_flags &= ~IFF_OACTIVE; |
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| 283 | } |
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| 284 | else { |
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| 285 | /* set flag to start process */ |
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| 286 | iprocess = 1; |
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| 287 | sc->sc_outflag = SC_TX_BUSY; |
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| 288 | sc->sc_if.if_flags |= IFF_OACTIVE; |
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| 289 | } |
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| 290 | } |
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| 291 | } |
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| 292 | |
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| 293 | /* check to see if there is any processing required */ |
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| 294 | if ( iprocess ) { |
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| 295 | /* clear process flag */ |
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| 296 | iprocess = (int)0; |
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| 297 | |
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| 298 | /* initialize output values */ |
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| 299 | sc->sc_outfcs = PPP_INITFCS; |
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| 300 | sc->sc_outbuf = (u_char *)0; |
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| 301 | sc->sc_outlen = (short )0; |
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| 302 | sc->sc_outoff = (short )0; |
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| 303 | sc->sc_outfcslen = (short )0; |
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| 304 | |
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| 305 | /* loop over all mbufs in chain */ |
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| 306 | mf = NULL; |
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| 307 | mp = NULL; |
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| 308 | m = sc->sc_outm; |
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| 309 | while (( m != (struct mbuf *)0 ) && ( m->m_len > 0 )) { |
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| 310 | /* check to see if first mbuf value has been set */ |
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| 311 | if ( sc->sc_outmc == (struct mbuf *)0 ) { |
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| 312 | /* set values to start with this mbuf */ |
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| 313 | sc->sc_outmc = m; |
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| 314 | sc->sc_outlen = m->m_len; |
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| 315 | sc->sc_outbuf = mtod(m, u_char *); |
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| 316 | } |
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| 317 | |
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| 318 | /* update the FCS value and then check next packet length */ |
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| 319 | sc->sc_outfcs = pppfcs(sc->sc_outfcs, mtod(m, u_char *), m->m_len); |
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| 320 | |
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| 321 | /* check next packet to see if it is empty */ |
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| 322 | while (( m->m_next != NULL ) && ( m->m_next->m_len == 0 )) { |
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| 323 | /* next mbuf is zero length */ |
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| 324 | /* add empty mbuf to free chain */ |
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| 325 | if ( mp == NULL ) { |
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| 326 | /* item is head of free list */ |
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| 327 | mf = m->m_next; |
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| 328 | mp = mf; |
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| 329 | } |
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| 330 | else { |
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| 331 | /* add item to end of the free list */ |
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| 332 | mp->m_next = m->m_next; |
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| 333 | mp = m->m_next; |
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| 334 | } |
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| 335 | |
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| 336 | /* remove empty item from process chain */ |
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| 337 | m->m_next = m->m_next->m_next; |
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| 338 | mp->m_next = NULL; |
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| 339 | } |
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| 340 | |
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| 341 | /* move to next packet */ |
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| 342 | m = m->m_next; |
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| 343 | } |
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| 344 | |
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| 345 | /* ensure there is data to be sent out */ |
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| 346 | tp = (struct rtems_termios_tty *)sc->sc_devp; |
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| 347 | if (( tp != NULL ) && ( sc->sc_outmc != (struct mbuf *)0 )) { |
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| 348 | /* place FCS value into buffer */ |
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| 349 | sc->sc_outfcsbuf[sc->sc_outfcslen++] = ~sc->sc_outfcs & 0xff; |
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| 350 | sc->sc_outfcsbuf[sc->sc_outfcslen++] = (~sc->sc_outfcs >> 8) & 0xff; |
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| 351 | microtime(&sc->sc_if.if_lastchange); |
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| 352 | |
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| 353 | /* write out frame byte to start the transmission */ |
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| 354 | (*tp->device.write)(tp->minor, &cFrame, 1); |
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| 355 | } |
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| 356 | |
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| 357 | /* check to see if we need to free some empty mbufs */ |
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| 358 | if ( mf != (struct mbuf *)0 ) { |
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| 359 | /* free empty mbufs */ |
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| 360 | rtems_bsdnet_semaphore_obtain(); |
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| 361 | m_freem(mf); |
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| 362 | rtems_bsdnet_semaphore_release(); |
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| 363 | } |
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| 364 | } |
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| 365 | } |
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| 366 | } |
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| 367 | |
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| 368 | static void ppp_init(struct ppp_softc *sc) |
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| 369 | { |
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| 370 | rtems_status_code status; |
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| 371 | rtems_unsigned32 priority = 100; |
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| 372 | |
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| 373 | /* determine priority value */ |
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| 374 | if ( rtems_bsdnet_config.network_task_priority ) { |
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| 375 | priority = rtems_bsdnet_config.network_task_priority; |
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| 376 | } |
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| 377 | |
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| 378 | /* check to see if we need to start up daemons */ |
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| 379 | if ( sc->sc_rxtask == 0 ) { |
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| 380 | /* start rx daemon task */ |
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| 381 | status = rtems_task_create(rtems_build_name('R','x','P','0'), priority, 2048, |
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| 382 | RTEMS_PREEMPT|RTEMS_NO_TIMESLICE|RTEMS_NO_ASR|RTEMS_INTERRUPT_LEVEL(0), |
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| 383 | RTEMS_NO_FLOATING_POINT|RTEMS_LOCAL, |
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| 384 | &sc->sc_rxtask); |
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| 385 | if (status != RTEMS_SUCCESSFUL) { |
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| 386 | rtems_fatal_error_occurred(status); |
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| 387 | } |
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| 388 | else { |
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| 389 | status = rtems_task_start(sc->sc_rxtask, ppp_rxdaemon, (rtems_task_argument)sc); |
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| 390 | if (status != RTEMS_SUCCESSFUL) { |
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| 391 | rtems_fatal_error_occurred(status); |
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| 392 | } |
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| 393 | } |
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| 394 | |
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| 395 | /* start tx daemon task */ |
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| 396 | status = rtems_task_create(rtems_build_name('T','x','P','0'), priority, 2048, |
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| 397 | RTEMS_PREEMPT|RTEMS_NO_TIMESLICE|RTEMS_NO_ASR|RTEMS_INTERRUPT_LEVEL(0), |
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| 398 | RTEMS_NO_FLOATING_POINT|RTEMS_LOCAL, |
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| 399 | &sc->sc_txtask); |
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| 400 | if (status != RTEMS_SUCCESSFUL) { |
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| 401 | rtems_fatal_error_occurred(status); |
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| 402 | } |
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| 403 | else { |
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| 404 | status = rtems_task_start(sc->sc_txtask, ppp_txdaemon, (rtems_task_argument)sc); |
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| 405 | if (status != RTEMS_SUCCESSFUL) { |
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| 406 | rtems_fatal_error_occurred(status); |
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| 407 | } |
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| 408 | } |
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| 409 | } |
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| 410 | |
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| 411 | /* mark driver running and output inactive */ |
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| 412 | sc->sc_if.if_flags |= IFF_RUNNING; |
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| 413 | } |
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[85a0f07] | 414 | |
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| 415 | /* |
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| 416 | * Called from boot code to establish ppp interfaces. |
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| 417 | */ |
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[0286b9f] | 418 | int rtems_ppp_driver_attach(struct rtems_bsdnet_ifconfig *config, int attaching) |
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[85a0f07] | 419 | { |
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[0286b9f] | 420 | int i = (int)0; |
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| 421 | struct ppp_softc *sc; |
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[85a0f07] | 422 | |
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| 423 | for (sc = ppp_softc; i < NPPP; sc++) { |
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| 424 | sc->sc_if.if_name = "ppp"; |
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| 425 | sc->sc_if.if_unit = i++; |
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| 426 | sc->sc_if.if_mtu = PPP_MTU; |
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| 427 | sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; |
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| 428 | sc->sc_if.if_type = IFT_PPP; |
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| 429 | sc->sc_if.if_hdrlen = PPP_HDRLEN; |
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| 430 | sc->sc_if.if_ioctl = pppsioctl; |
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| 431 | sc->sc_if.if_output = pppoutput; |
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| 432 | sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN; |
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| 433 | sc->sc_inq.ifq_maxlen = IFQ_MAXLEN; |
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| 434 | sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN; |
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| 435 | sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN; |
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[0286b9f] | 436 | sc->sc_freeq.ifq_maxlen = NUM_MBUFQ; |
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| 437 | |
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| 438 | /* initialize and attach */ |
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| 439 | ppp_init(sc); |
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[85a0f07] | 440 | if_attach(&sc->sc_if); |
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| 441 | #if NBPFILTER > 0 |
---|
| 442 | bpfattach(&sc->sc_bpf, &sc->sc_if, DLT_PPP, PPP_HDRLEN); |
---|
| 443 | #endif |
---|
| 444 | } |
---|
[0286b9f] | 445 | |
---|
| 446 | return ( 1 ); |
---|
[85a0f07] | 447 | } |
---|
| 448 | |
---|
| 449 | /* |
---|
| 450 | * Allocate a ppp interface unit and initialize it. |
---|
| 451 | */ |
---|
| 452 | struct ppp_softc * |
---|
| 453 | pppalloc(pid) |
---|
| 454 | pid_t pid; |
---|
| 455 | { |
---|
| 456 | int nppp, i; |
---|
| 457 | struct ppp_softc *sc; |
---|
[0286b9f] | 458 | |
---|
[85a0f07] | 459 | for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++) |
---|
| 460 | if (sc->sc_xfer == pid) { |
---|
| 461 | sc->sc_xfer = 0; |
---|
| 462 | return sc; |
---|
| 463 | } |
---|
| 464 | for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++) |
---|
| 465 | if (sc->sc_devp == NULL) |
---|
| 466 | break; |
---|
| 467 | if (nppp >= NPPP) |
---|
| 468 | return NULL; |
---|
| 469 | |
---|
| 470 | sc->sc_flags = 0; |
---|
| 471 | sc->sc_mru = PPP_MRU; |
---|
| 472 | sc->sc_relinq = NULL; |
---|
| 473 | bzero((char *)&sc->sc_stats, sizeof(sc->sc_stats)); |
---|
| 474 | #ifdef VJC |
---|
[0286b9f] | 475 | MALLOC(sc->sc_comp, struct vjcompress *, sizeof(struct vjcompress), |
---|
| 476 | M_DEVBUF, M_NOWAIT); |
---|
[85a0f07] | 477 | if (sc->sc_comp) |
---|
| 478 | vj_compress_init(sc->sc_comp, -1); |
---|
| 479 | #endif |
---|
| 480 | #ifdef PPP_COMPRESS |
---|
| 481 | sc->sc_xc_state = NULL; |
---|
| 482 | sc->sc_rc_state = NULL; |
---|
| 483 | #endif /* PPP_COMPRESS */ |
---|
| 484 | for (i = 0; i < NUM_NP; ++i) |
---|
| 485 | sc->sc_npmode[i] = NPMODE_ERROR; |
---|
| 486 | sc->sc_npqueue = NULL; |
---|
| 487 | sc->sc_npqtail = &sc->sc_npqueue; |
---|
[0286b9f] | 488 | microtime(&ppp_time); |
---|
[85a0f07] | 489 | sc->sc_last_sent = sc->sc_last_recv = ppp_time.tv_sec; |
---|
| 490 | |
---|
| 491 | return sc; |
---|
| 492 | } |
---|
| 493 | |
---|
| 494 | /* |
---|
| 495 | * Deallocate a ppp unit. Must be called at splsoftnet or higher. |
---|
| 496 | */ |
---|
| 497 | void |
---|
| 498 | pppdealloc(sc) |
---|
| 499 | struct ppp_softc *sc; |
---|
| 500 | { |
---|
| 501 | struct mbuf *m; |
---|
[0286b9f] | 502 | rtems_interrupt_level level; |
---|
[85a0f07] | 503 | |
---|
| 504 | if_down(&sc->sc_if); |
---|
| 505 | sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING); |
---|
| 506 | sc->sc_devp = NULL; |
---|
| 507 | sc->sc_xfer = 0; |
---|
[0286b9f] | 508 | |
---|
| 509 | rtems_interrupt_disable(level); |
---|
| 510 | if ( sc->sc_m != NULL ) { |
---|
| 511 | m_freem(sc->sc_m); |
---|
| 512 | sc->sc_m = (struct mbuf *)0; |
---|
| 513 | } |
---|
| 514 | if ( sc->sc_outm != NULL ) { |
---|
| 515 | m_freem(sc->sc_outm); |
---|
| 516 | sc->sc_outm = (struct mbuf *)0; |
---|
| 517 | sc->sc_outmc = (struct mbuf *)0; |
---|
| 518 | sc->sc_outflag = 0; |
---|
[85a0f07] | 519 | } |
---|
[0286b9f] | 520 | do { |
---|
| 521 | IF_DEQUEUE(&sc->sc_freeq, m); |
---|
| 522 | if (m != NULL) { |
---|
| 523 | m_freem(m); |
---|
| 524 | } |
---|
| 525 | } while ( m != NULL ); |
---|
| 526 | do { |
---|
| 527 | IF_DEQUEUE(&sc->sc_rawq, m); |
---|
| 528 | if (m != NULL) { |
---|
| 529 | m_freem(m); |
---|
| 530 | } |
---|
| 531 | } while ( m != NULL ); |
---|
| 532 | rtems_interrupt_enable(level); |
---|
| 533 | |
---|
[85a0f07] | 534 | for (;;) { |
---|
| 535 | IF_DEQUEUE(&sc->sc_inq, m); |
---|
| 536 | if (m == NULL) |
---|
| 537 | break; |
---|
| 538 | m_freem(m); |
---|
| 539 | } |
---|
| 540 | for (;;) { |
---|
| 541 | IF_DEQUEUE(&sc->sc_fastq, m); |
---|
| 542 | if (m == NULL) |
---|
| 543 | break; |
---|
| 544 | m_freem(m); |
---|
| 545 | } |
---|
| 546 | while ((m = sc->sc_npqueue) != NULL) { |
---|
| 547 | sc->sc_npqueue = m->m_nextpkt; |
---|
| 548 | m_freem(m); |
---|
| 549 | } |
---|
| 550 | #ifdef PPP_COMPRESS |
---|
| 551 | ppp_ccp_closed(sc); |
---|
| 552 | sc->sc_xc_state = NULL; |
---|
| 553 | sc->sc_rc_state = NULL; |
---|
| 554 | #endif /* PPP_COMPRESS */ |
---|
| 555 | #ifdef PPP_FILTER |
---|
| 556 | if (sc->sc_pass_filt.bf_insns != 0) { |
---|
[0286b9f] | 557 | FREE(sc->sc_pass_filt.bf_insns, M_DEVBUF); |
---|
[85a0f07] | 558 | sc->sc_pass_filt.bf_insns = 0; |
---|
| 559 | sc->sc_pass_filt.bf_len = 0; |
---|
| 560 | } |
---|
| 561 | if (sc->sc_active_filt.bf_insns != 0) { |
---|
[0286b9f] | 562 | FREE(sc->sc_active_filt.bf_insns, M_DEVBUF); |
---|
[85a0f07] | 563 | sc->sc_active_filt.bf_insns = 0; |
---|
| 564 | sc->sc_active_filt.bf_len = 0; |
---|
| 565 | } |
---|
| 566 | #endif /* PPP_FILTER */ |
---|
| 567 | #ifdef VJC |
---|
| 568 | if (sc->sc_comp != 0) { |
---|
[0286b9f] | 569 | FREE(sc->sc_comp, M_DEVBUF); |
---|
[85a0f07] | 570 | sc->sc_comp = 0; |
---|
| 571 | } |
---|
| 572 | #endif |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | /* |
---|
| 576 | * Ioctl routine for generic ppp devices. |
---|
| 577 | */ |
---|
| 578 | int |
---|
| 579 | pppioctl(sc, cmd, data, flag, p) |
---|
| 580 | struct ppp_softc *sc; |
---|
| 581 | int cmd; |
---|
| 582 | caddr_t data; |
---|
| 583 | int flag; |
---|
| 584 | struct proc *p; |
---|
| 585 | { |
---|
[0286b9f] | 586 | int s, flags, mru, npx, taskid; |
---|
[85a0f07] | 587 | struct npioctl *npi; |
---|
| 588 | time_t t; |
---|
| 589 | #ifdef PPP_FILTER |
---|
[78d6a50] | 590 | int error; |
---|
[85a0f07] | 591 | struct bpf_program *bp, *nbp; |
---|
| 592 | struct bpf_insn *newcode, *oldcode; |
---|
| 593 | int newcodelen; |
---|
| 594 | #endif /* PPP_FILTER */ |
---|
| 595 | #ifdef PPP_COMPRESS |
---|
[78d6a50] | 596 | int nb; |
---|
| 597 | struct ppp_option_data *odp; |
---|
| 598 | struct compressor **cp; |
---|
[85a0f07] | 599 | u_char ccp_option[CCP_MAX_OPTION_LENGTH]; |
---|
| 600 | #endif |
---|
| 601 | |
---|
| 602 | switch (cmd) { |
---|
| 603 | case FIONREAD: |
---|
| 604 | *(int *)data = sc->sc_inq.ifq_len; |
---|
| 605 | break; |
---|
| 606 | |
---|
[0286b9f] | 607 | case PPPIOCSTASK: |
---|
| 608 | taskid = *(int *)data; |
---|
| 609 | sc->sc_pppdtask = taskid; |
---|
| 610 | break; |
---|
| 611 | |
---|
[85a0f07] | 612 | case PPPIOCGUNIT: |
---|
| 613 | *(int *)data = sc->sc_if.if_unit; |
---|
| 614 | break; |
---|
| 615 | |
---|
| 616 | case PPPIOCGFLAGS: |
---|
| 617 | *(u_int *)data = sc->sc_flags; |
---|
| 618 | break; |
---|
| 619 | |
---|
| 620 | case PPPIOCSFLAGS: |
---|
| 621 | flags = *(int *)data & SC_MASK; |
---|
| 622 | s = splsoftnet(); |
---|
| 623 | #ifdef PPP_COMPRESS |
---|
| 624 | if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN)) |
---|
| 625 | ppp_ccp_closed(sc); |
---|
| 626 | #endif |
---|
[cb1e8a46] | 627 | s = splimp(); |
---|
[85a0f07] | 628 | sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags; |
---|
| 629 | splx(s); |
---|
| 630 | break; |
---|
| 631 | |
---|
| 632 | case PPPIOCSMRU: |
---|
| 633 | mru = *(int *)data; |
---|
[0286b9f] | 634 | if ( mru >= MCLBYTES ) { |
---|
| 635 | /* error - currently only handle 1 culster sized MRU */ |
---|
| 636 | /* if we want to handle up to PPP_MAXMRU then we */ |
---|
| 637 | /* need to reallocate all mbufs on the freeq */ |
---|
| 638 | /* this can only be done with iterrupts disabled */ |
---|
| 639 | return ( -1 ); |
---|
| 640 | } |
---|
| 641 | else if ( mru >= PPP_MRU ) { |
---|
| 642 | /* update the size */ |
---|
| 643 | sc->sc_mru = mru; |
---|
| 644 | } |
---|
[85a0f07] | 645 | break; |
---|
| 646 | |
---|
| 647 | case PPPIOCGMRU: |
---|
| 648 | *(int *)data = sc->sc_mru; |
---|
| 649 | break; |
---|
| 650 | |
---|
| 651 | #ifdef VJC |
---|
| 652 | case PPPIOCSMAXCID: |
---|
| 653 | if (sc->sc_comp) { |
---|
| 654 | s = splsoftnet(); |
---|
| 655 | vj_compress_init(sc->sc_comp, *(int *)data); |
---|
| 656 | splx(s); |
---|
| 657 | } |
---|
| 658 | break; |
---|
| 659 | #endif |
---|
| 660 | |
---|
| 661 | case PPPIOCXFERUNIT: |
---|
| 662 | sc->sc_xfer = 0; /* Always root p->p_pid;*/ |
---|
| 663 | break; |
---|
| 664 | |
---|
| 665 | #ifdef PPP_COMPRESS |
---|
| 666 | case PPPIOCSCOMPRESS: |
---|
| 667 | odp = (struct ppp_option_data *) data; |
---|
| 668 | nb = odp->length; |
---|
| 669 | if (nb > sizeof(ccp_option)) |
---|
| 670 | nb = sizeof(ccp_option); |
---|
| 671 | if ((error = copyin(odp->ptr, ccp_option, nb)) != 0) |
---|
| 672 | return (error); |
---|
| 673 | if (ccp_option[1] < 2) /* preliminary check on the length byte */ |
---|
| 674 | return (EINVAL); |
---|
| 675 | for (cp = ppp_compressors; *cp != NULL; ++cp) |
---|
| 676 | if ((*cp)->compress_proto == ccp_option[0]) { |
---|
| 677 | /* |
---|
| 678 | * Found a handler for the protocol - try to allocate |
---|
| 679 | * a compressor or decompressor. |
---|
| 680 | */ |
---|
| 681 | error = 0; |
---|
| 682 | if (odp->transmit) { |
---|
| 683 | s = splsoftnet(); |
---|
| 684 | if (sc->sc_xc_state != NULL) |
---|
| 685 | (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); |
---|
| 686 | sc->sc_xcomp = *cp; |
---|
| 687 | sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb); |
---|
| 688 | if (sc->sc_xc_state == NULL) { |
---|
| 689 | if (sc->sc_flags & SC_DEBUG) |
---|
| 690 | printf("ppp%d: comp_alloc failed\n", |
---|
| 691 | sc->sc_if.if_unit); |
---|
| 692 | error = ENOBUFS; |
---|
| 693 | } |
---|
| 694 | splimp(); |
---|
| 695 | sc->sc_flags &= ~SC_COMP_RUN; |
---|
| 696 | splx(s); |
---|
| 697 | } else { |
---|
| 698 | s = splsoftnet(); |
---|
| 699 | if (sc->sc_rc_state != NULL) |
---|
| 700 | (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); |
---|
| 701 | sc->sc_rcomp = *cp; |
---|
| 702 | sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb); |
---|
| 703 | if (sc->sc_rc_state == NULL) { |
---|
| 704 | if (sc->sc_flags & SC_DEBUG) |
---|
| 705 | printf("ppp%d: decomp_alloc failed\n", |
---|
| 706 | sc->sc_if.if_unit); |
---|
| 707 | error = ENOBUFS; |
---|
| 708 | } |
---|
| 709 | splimp(); |
---|
| 710 | sc->sc_flags &= ~SC_DECOMP_RUN; |
---|
| 711 | splx(s); |
---|
| 712 | } |
---|
| 713 | return (error); |
---|
| 714 | } |
---|
| 715 | if (sc->sc_flags & SC_DEBUG) |
---|
| 716 | printf("ppp%d: no compressor for [%x %x %x], %x\n", |
---|
| 717 | sc->sc_if.if_unit, ccp_option[0], ccp_option[1], |
---|
| 718 | ccp_option[2], nb); |
---|
| 719 | return (EINVAL); /* no handler found */ |
---|
| 720 | #endif /* PPP_COMPRESS */ |
---|
| 721 | |
---|
| 722 | case PPPIOCGNPMODE: |
---|
| 723 | case PPPIOCSNPMODE: |
---|
| 724 | npi = (struct npioctl *) data; |
---|
| 725 | switch (npi->protocol) { |
---|
| 726 | case PPP_IP: |
---|
| 727 | npx = NP_IP; |
---|
| 728 | break; |
---|
| 729 | default: |
---|
| 730 | return EINVAL; |
---|
| 731 | } |
---|
| 732 | if (cmd == PPPIOCGNPMODE) { |
---|
| 733 | npi->mode = sc->sc_npmode[npx]; |
---|
| 734 | } else { |
---|
| 735 | if (npi->mode != sc->sc_npmode[npx]) { |
---|
| 736 | s = splsoftnet(); |
---|
| 737 | sc->sc_npmode[npx] = npi->mode; |
---|
| 738 | if (npi->mode != NPMODE_QUEUE) { |
---|
| 739 | ppp_requeue(sc); |
---|
| 740 | (*sc->sc_start)(sc); |
---|
| 741 | } |
---|
| 742 | splx(s); |
---|
| 743 | } |
---|
| 744 | } |
---|
| 745 | break; |
---|
| 746 | |
---|
| 747 | case PPPIOCGIDLE: |
---|
| 748 | s = splsoftnet(); |
---|
[0286b9f] | 749 | microtime(&ppp_time); |
---|
[85a0f07] | 750 | t = ppp_time.tv_sec; |
---|
| 751 | ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent; |
---|
| 752 | ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv; |
---|
| 753 | splx(s); |
---|
| 754 | break; |
---|
| 755 | |
---|
| 756 | #ifdef PPP_FILTER |
---|
| 757 | case PPPIOCSPASS: |
---|
| 758 | case PPPIOCSACTIVE: |
---|
| 759 | nbp = (struct bpf_program *) data; |
---|
| 760 | if ((unsigned) nbp->bf_len > BPF_MAXINSNS) |
---|
| 761 | return EINVAL; |
---|
| 762 | newcodelen = nbp->bf_len * sizeof(struct bpf_insn); |
---|
| 763 | if (newcodelen != 0) { |
---|
[0286b9f] | 764 | MALLOC(newcode, struct bpf_insn *, newcodelen, M_DEVBUF, M_WAITOK); |
---|
[85a0f07] | 765 | if (newcode == 0) { |
---|
| 766 | return EINVAL; /* or sumpin */ |
---|
| 767 | } |
---|
| 768 | if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode, |
---|
| 769 | newcodelen)) != 0) { |
---|
[0286b9f] | 770 | FREE(newcode, M_DEVBUF); |
---|
[85a0f07] | 771 | return error; |
---|
| 772 | } |
---|
| 773 | if (!bpf_validate(newcode, nbp->bf_len)) { |
---|
[0286b9f] | 774 | FREE(newcode, M_DEVBUF); |
---|
[85a0f07] | 775 | return EINVAL; |
---|
| 776 | } |
---|
| 777 | } else |
---|
| 778 | newcode = 0; |
---|
| 779 | bp = (cmd == PPPIOCSPASS)? &sc->sc_pass_filt: &sc->sc_active_filt; |
---|
| 780 | oldcode = bp->bf_insns; |
---|
| 781 | s = splimp(); |
---|
| 782 | bp->bf_len = nbp->bf_len; |
---|
| 783 | bp->bf_insns = newcode; |
---|
| 784 | splx(s); |
---|
| 785 | if (oldcode != 0) |
---|
[0286b9f] | 786 | FREE(oldcode, M_DEVBUF); |
---|
[85a0f07] | 787 | break; |
---|
| 788 | #endif |
---|
| 789 | |
---|
| 790 | default: |
---|
| 791 | return (-1); |
---|
| 792 | } |
---|
| 793 | return (0); |
---|
| 794 | } |
---|
| 795 | |
---|
| 796 | /* |
---|
| 797 | * Process an ioctl request to the ppp network interface. |
---|
| 798 | */ |
---|
| 799 | static int |
---|
| 800 | pppsioctl(ifp, cmd, data) |
---|
| 801 | register struct ifnet *ifp; |
---|
| 802 | int cmd; |
---|
| 803 | caddr_t data; |
---|
| 804 | { |
---|
[0286b9f] | 805 | /*struct proc *p = curproc;*/ /* XXX */ |
---|
[85a0f07] | 806 | register struct ppp_softc *sc = &ppp_softc[ifp->if_unit]; |
---|
| 807 | register struct ifaddr *ifa = (struct ifaddr *)data; |
---|
| 808 | register struct ifreq *ifr = (struct ifreq *)data; |
---|
| 809 | struct ppp_stats *psp; |
---|
| 810 | #ifdef PPP_COMPRESS |
---|
| 811 | struct ppp_comp_stats *pcp; |
---|
| 812 | #endif |
---|
| 813 | int s = splimp(), error = 0; |
---|
| 814 | |
---|
| 815 | switch (cmd) { |
---|
| 816 | case SIOCSIFFLAGS: |
---|
| 817 | if ((ifp->if_flags & IFF_RUNNING) == 0) |
---|
| 818 | ifp->if_flags &= ~IFF_UP; |
---|
| 819 | break; |
---|
| 820 | |
---|
| 821 | case SIOCSIFADDR: |
---|
| 822 | if (ifa->ifa_addr->sa_family != AF_INET) |
---|
| 823 | error = EAFNOSUPPORT; |
---|
| 824 | break; |
---|
| 825 | |
---|
| 826 | case SIOCSIFDSTADDR: |
---|
| 827 | if (ifa->ifa_addr->sa_family != AF_INET) |
---|
| 828 | error = EAFNOSUPPORT; |
---|
| 829 | break; |
---|
| 830 | |
---|
| 831 | case SIOCSIFMTU: |
---|
| 832 | sc->sc_if.if_mtu = ifr->ifr_mtu; |
---|
| 833 | break; |
---|
| 834 | |
---|
| 835 | case SIOCGIFMTU: |
---|
| 836 | ifr->ifr_mtu = sc->sc_if.if_mtu; |
---|
| 837 | break; |
---|
| 838 | |
---|
| 839 | case SIOCADDMULTI: |
---|
| 840 | case SIOCDELMULTI: |
---|
| 841 | if (ifr == 0) { |
---|
| 842 | error = EAFNOSUPPORT; |
---|
| 843 | break; |
---|
| 844 | } |
---|
| 845 | switch(ifr->ifr_addr.sa_family) { |
---|
| 846 | #ifdef INET |
---|
| 847 | case AF_INET: |
---|
| 848 | break; |
---|
| 849 | #endif |
---|
| 850 | default: |
---|
| 851 | error = EAFNOSUPPORT; |
---|
| 852 | break; |
---|
| 853 | } |
---|
| 854 | break; |
---|
[0286b9f] | 855 | |
---|
| 856 | case SIO_RTEMS_SHOW_STATS: |
---|
| 857 | printf(" MRU:%-8u", sc->sc_mru); |
---|
| 858 | printf(" Bytes received:%-8u", sc->sc_stats.ppp_ibytes); |
---|
| 859 | printf(" Packets received:%-8u", sc->sc_stats.ppp_ipackets); |
---|
| 860 | printf(" Receive errors:%-8u\n", sc->sc_stats.ppp_ierrors); |
---|
| 861 | printf(" Bytes sent:%-8u", sc->sc_stats.ppp_obytes); |
---|
| 862 | printf(" Packets sent:%-8u", sc->sc_stats.ppp_opackets); |
---|
| 863 | printf(" Transmit errors:%-8u\n", sc->sc_stats.ppp_oerrors); |
---|
[85a0f07] | 864 | break; |
---|
| 865 | |
---|
| 866 | case SIOCGPPPSTATS: |
---|
| 867 | psp = &((struct ifpppstatsreq *) data)->stats; |
---|
| 868 | bzero(psp, sizeof(*psp)); |
---|
| 869 | psp->p = sc->sc_stats; |
---|
| 870 | #if defined(VJC) && !defined(SL_NO_STATS) |
---|
| 871 | if (sc->sc_comp) { |
---|
| 872 | psp->vj.vjs_packets = sc->sc_comp->sls_packets; |
---|
| 873 | psp->vj.vjs_compressed = sc->sc_comp->sls_compressed; |
---|
| 874 | psp->vj.vjs_searches = sc->sc_comp->sls_searches; |
---|
| 875 | psp->vj.vjs_misses = sc->sc_comp->sls_misses; |
---|
| 876 | psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin; |
---|
| 877 | psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin; |
---|
| 878 | psp->vj.vjs_errorin = sc->sc_comp->sls_errorin; |
---|
| 879 | psp->vj.vjs_tossed = sc->sc_comp->sls_tossed; |
---|
| 880 | } |
---|
| 881 | #endif /* VJC */ |
---|
| 882 | break; |
---|
| 883 | |
---|
| 884 | #ifdef PPP_COMPRESS |
---|
| 885 | case SIOCGPPPCSTATS: |
---|
| 886 | pcp = &((struct ifpppcstatsreq *) data)->stats; |
---|
| 887 | bzero(pcp, sizeof(*pcp)); |
---|
| 888 | if (sc->sc_xc_state != NULL) |
---|
| 889 | (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c); |
---|
| 890 | if (sc->sc_rc_state != NULL) |
---|
| 891 | (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d); |
---|
| 892 | break; |
---|
| 893 | #endif /* PPP_COMPRESS */ |
---|
| 894 | |
---|
| 895 | default: |
---|
| 896 | error = EINVAL; |
---|
| 897 | } |
---|
| 898 | splx(s); |
---|
| 899 | return (error); |
---|
| 900 | } |
---|
| 901 | |
---|
| 902 | /* |
---|
| 903 | * Queue a packet. Start transmission if not active. |
---|
| 904 | * Packet is placed in Information field of PPP frame. |
---|
| 905 | */ |
---|
| 906 | int |
---|
| 907 | pppoutput(ifp, m0, dst, rtp) |
---|
| 908 | struct ifnet *ifp; |
---|
| 909 | struct mbuf *m0; |
---|
| 910 | struct sockaddr *dst; |
---|
| 911 | struct rtentry *rtp; |
---|
| 912 | { |
---|
| 913 | register struct ppp_softc *sc = &ppp_softc[ifp->if_unit]; |
---|
| 914 | int protocol, address, control; |
---|
| 915 | u_char *cp; |
---|
| 916 | int s, error; |
---|
| 917 | struct ip *ip; |
---|
| 918 | struct ifqueue *ifq; |
---|
| 919 | enum NPmode mode; |
---|
| 920 | int len; |
---|
| 921 | struct mbuf *m; |
---|
[0286b9f] | 922 | |
---|
[85a0f07] | 923 | if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0 |
---|
| 924 | || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) { |
---|
| 925 | error = ENETDOWN; /* sort of */ |
---|
| 926 | goto bad; |
---|
| 927 | } |
---|
| 928 | |
---|
| 929 | /* |
---|
| 930 | * Compute PPP header. |
---|
| 931 | */ |
---|
| 932 | m0->m_flags &= ~M_HIGHPRI; |
---|
| 933 | switch (dst->sa_family) { |
---|
| 934 | #ifdef INET |
---|
| 935 | case AF_INET: |
---|
| 936 | address = PPP_ALLSTATIONS; |
---|
| 937 | control = PPP_UI; |
---|
| 938 | protocol = PPP_IP; |
---|
| 939 | mode = sc->sc_npmode[NP_IP]; |
---|
| 940 | |
---|
| 941 | /* |
---|
| 942 | * If this packet has the "low delay" bit set in the IP header, |
---|
| 943 | * put it on the fastq instead. |
---|
| 944 | */ |
---|
| 945 | ip = mtod(m0, struct ip *); |
---|
| 946 | if (ip->ip_tos & IPTOS_LOWDELAY) |
---|
| 947 | m0->m_flags |= M_HIGHPRI; |
---|
| 948 | break; |
---|
| 949 | #endif |
---|
| 950 | case AF_UNSPEC: |
---|
| 951 | address = PPP_ADDRESS(dst->sa_data); |
---|
| 952 | control = PPP_CONTROL(dst->sa_data); |
---|
| 953 | protocol = PPP_PROTOCOL(dst->sa_data); |
---|
| 954 | mode = NPMODE_PASS; |
---|
| 955 | break; |
---|
| 956 | default: |
---|
| 957 | printf("ppp%d: af%d not supported\n", ifp->if_unit, dst->sa_family); |
---|
| 958 | error = EAFNOSUPPORT; |
---|
| 959 | goto bad; |
---|
| 960 | } |
---|
| 961 | |
---|
| 962 | /* |
---|
| 963 | * Drop this packet, or return an error, if necessary. |
---|
| 964 | */ |
---|
| 965 | if (mode == NPMODE_ERROR) { |
---|
| 966 | error = ENETDOWN; |
---|
| 967 | goto bad; |
---|
| 968 | } |
---|
| 969 | if (mode == NPMODE_DROP) { |
---|
| 970 | error = 0; |
---|
| 971 | goto bad; |
---|
| 972 | } |
---|
| 973 | |
---|
| 974 | /* |
---|
| 975 | * Add PPP header. If no space in first mbuf, allocate another. |
---|
| 976 | * (This assumes M_LEADINGSPACE is always 0 for a cluster mbuf.) |
---|
| 977 | */ |
---|
| 978 | if (M_LEADINGSPACE(m0) < PPP_HDRLEN) { |
---|
| 979 | m0 = m_prepend(m0, PPP_HDRLEN, M_DONTWAIT); |
---|
| 980 | if (m0 == 0) { |
---|
| 981 | error = ENOBUFS; |
---|
| 982 | goto bad; |
---|
| 983 | } |
---|
| 984 | m0->m_len = 0; |
---|
| 985 | } else |
---|
| 986 | m0->m_data -= PPP_HDRLEN; |
---|
| 987 | |
---|
| 988 | cp = mtod(m0, u_char *); |
---|
| 989 | *cp++ = address; |
---|
| 990 | *cp++ = control; |
---|
| 991 | *cp++ = protocol >> 8; |
---|
| 992 | *cp++ = protocol & 0xff; |
---|
| 993 | m0->m_len += PPP_HDRLEN; |
---|
| 994 | |
---|
| 995 | len = 0; |
---|
| 996 | for (m = m0; m != 0; m = m->m_next) |
---|
| 997 | len += m->m_len; |
---|
| 998 | |
---|
| 999 | if (sc->sc_flags & SC_LOG_OUTPKT) { |
---|
| 1000 | printf("ppp%d output: ", ifp->if_unit); |
---|
| 1001 | pppdumpm(m0); |
---|
| 1002 | } |
---|
| 1003 | |
---|
| 1004 | if ((protocol & 0x8000) == 0) { |
---|
| 1005 | #ifdef PPP_FILTER |
---|
| 1006 | /* |
---|
| 1007 | * Apply the pass and active filters to the packet, |
---|
| 1008 | * but only if it is a data packet. |
---|
| 1009 | */ |
---|
| 1010 | *mtod(m0, u_char *) = 1; /* indicates outbound */ |
---|
| 1011 | if (sc->sc_pass_filt.bf_insns != 0 |
---|
| 1012 | && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m0, |
---|
| 1013 | len, 0) == 0) { |
---|
| 1014 | error = 0; /* drop this packet */ |
---|
| 1015 | goto bad; |
---|
| 1016 | } |
---|
| 1017 | |
---|
| 1018 | /* |
---|
| 1019 | * Update the time we sent the most recent packet. |
---|
| 1020 | */ |
---|
| 1021 | if (sc->sc_active_filt.bf_insns == 0 |
---|
| 1022 | || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0)) |
---|
[0286b9f] | 1023 | sc->sc_last_sent = time.tv_sec; |
---|
[85a0f07] | 1024 | |
---|
| 1025 | *mtod(m0, u_char *) = address; |
---|
| 1026 | #else |
---|
| 1027 | /* |
---|
| 1028 | * Update the time we sent the most recent data packet. |
---|
| 1029 | */ |
---|
[0286b9f] | 1030 | microtime(&ppp_time); |
---|
[85a0f07] | 1031 | sc->sc_last_sent = ppp_time.tv_sec; |
---|
| 1032 | #endif /* PPP_FILTER */ |
---|
| 1033 | } |
---|
| 1034 | |
---|
| 1035 | #if NBPFILTER > 0 |
---|
| 1036 | /* |
---|
| 1037 | * See if bpf wants to look at the packet. |
---|
| 1038 | */ |
---|
| 1039 | if (sc->sc_bpf) |
---|
| 1040 | bpf_mtap(sc->sc_bpf, m0); |
---|
| 1041 | #endif |
---|
| 1042 | |
---|
| 1043 | /* |
---|
| 1044 | * Put the packet on the appropriate queue. |
---|
| 1045 | */ |
---|
[0286b9f] | 1046 | s = splsoftnet(); |
---|
[85a0f07] | 1047 | if (mode == NPMODE_QUEUE) { |
---|
| 1048 | /* XXX we should limit the number of packets on this queue */ |
---|
| 1049 | *sc->sc_npqtail = m0; |
---|
| 1050 | m0->m_nextpkt = NULL; |
---|
| 1051 | sc->sc_npqtail = &m0->m_nextpkt; |
---|
| 1052 | } else { |
---|
| 1053 | ifq = (m0->m_flags & M_HIGHPRI)? &sc->sc_fastq: &ifp->if_snd; |
---|
| 1054 | if (IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) { |
---|
| 1055 | IF_DROP(ifq); |
---|
| 1056 | splx(s); |
---|
| 1057 | sc->sc_if.if_oerrors++; |
---|
| 1058 | sc->sc_stats.ppp_oerrors++; |
---|
| 1059 | error = ENOBUFS; |
---|
| 1060 | goto bad; |
---|
| 1061 | } |
---|
| 1062 | IF_ENQUEUE(ifq, m0); |
---|
| 1063 | (*sc->sc_start)(sc); |
---|
| 1064 | } |
---|
| 1065 | ifp->if_lastchange = ppp_time; |
---|
| 1066 | ifp->if_opackets++; |
---|
| 1067 | ifp->if_obytes += len; |
---|
| 1068 | |
---|
[0286b9f] | 1069 | splx(s); |
---|
[85a0f07] | 1070 | return (0); |
---|
| 1071 | |
---|
| 1072 | bad: |
---|
| 1073 | m_freem(m0); |
---|
| 1074 | return (error); |
---|
| 1075 | } |
---|
| 1076 | |
---|
| 1077 | /* |
---|
| 1078 | * After a change in the NPmode for some NP, move packets from the |
---|
| 1079 | * npqueue to the send queue or the fast queue as appropriate. |
---|
| 1080 | * Should be called at splsoftnet. |
---|
| 1081 | */ |
---|
| 1082 | static void |
---|
| 1083 | ppp_requeue(sc) |
---|
| 1084 | struct ppp_softc *sc; |
---|
| 1085 | { |
---|
| 1086 | struct mbuf *m, **mpp; |
---|
| 1087 | struct ifqueue *ifq; |
---|
| 1088 | enum NPmode mode; |
---|
| 1089 | |
---|
| 1090 | for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) { |
---|
| 1091 | switch (PPP_PROTOCOL(mtod(m, u_char *))) { |
---|
| 1092 | case PPP_IP: |
---|
| 1093 | mode = sc->sc_npmode[NP_IP]; |
---|
| 1094 | break; |
---|
| 1095 | default: |
---|
| 1096 | mode = NPMODE_PASS; |
---|
| 1097 | } |
---|
| 1098 | |
---|
| 1099 | switch (mode) { |
---|
| 1100 | case NPMODE_PASS: |
---|
| 1101 | /* |
---|
| 1102 | * This packet can now go on one of the queues to be sent. |
---|
| 1103 | */ |
---|
| 1104 | *mpp = m->m_nextpkt; |
---|
| 1105 | m->m_nextpkt = NULL; |
---|
| 1106 | ifq = (m->m_flags & M_HIGHPRI)? &sc->sc_fastq: &sc->sc_if.if_snd; |
---|
| 1107 | if (IF_QFULL(ifq)) { |
---|
| 1108 | IF_DROP(ifq); |
---|
| 1109 | sc->sc_if.if_oerrors++; |
---|
| 1110 | sc->sc_stats.ppp_oerrors++; |
---|
| 1111 | } else |
---|
| 1112 | IF_ENQUEUE(ifq, m); |
---|
| 1113 | break; |
---|
| 1114 | |
---|
| 1115 | case NPMODE_DROP: |
---|
| 1116 | case NPMODE_ERROR: |
---|
| 1117 | *mpp = m->m_nextpkt; |
---|
| 1118 | m_freem(m); |
---|
| 1119 | break; |
---|
| 1120 | |
---|
| 1121 | case NPMODE_QUEUE: |
---|
| 1122 | mpp = &m->m_nextpkt; |
---|
| 1123 | break; |
---|
| 1124 | } |
---|
| 1125 | } |
---|
| 1126 | sc->sc_npqtail = mpp; |
---|
| 1127 | } |
---|
| 1128 | |
---|
| 1129 | /* |
---|
| 1130 | * Get a packet to send. This procedure is intended to be called at |
---|
| 1131 | * splsoftnet, since it may involve time-consuming operations such as |
---|
| 1132 | * applying VJ compression, packet compression, address/control and/or |
---|
| 1133 | * protocol field compression to the packet. |
---|
| 1134 | */ |
---|
| 1135 | struct mbuf * |
---|
| 1136 | ppp_dequeue(sc) |
---|
| 1137 | struct ppp_softc *sc; |
---|
| 1138 | { |
---|
[cb1e8a46] | 1139 | struct mbuf *m; |
---|
| 1140 | #ifdef VJC |
---|
| 1141 | struct mbuf *mp; |
---|
| 1142 | #endif |
---|
[85a0f07] | 1143 | u_char *cp; |
---|
| 1144 | int address, control, protocol; |
---|
| 1145 | |
---|
| 1146 | /* |
---|
| 1147 | * Grab a packet to send: first try the fast queue, then the |
---|
| 1148 | * normal queue. |
---|
| 1149 | */ |
---|
[0286b9f] | 1150 | rtems_bsdnet_semaphore_obtain(); |
---|
[85a0f07] | 1151 | IF_DEQUEUE(&sc->sc_fastq, m); |
---|
| 1152 | if (m == NULL) |
---|
| 1153 | IF_DEQUEUE(&sc->sc_if.if_snd, m); |
---|
[0286b9f] | 1154 | rtems_bsdnet_semaphore_release(); |
---|
| 1155 | |
---|
[85a0f07] | 1156 | if (m == NULL) |
---|
| 1157 | return NULL; |
---|
| 1158 | |
---|
| 1159 | ++sc->sc_stats.ppp_opackets; |
---|
| 1160 | |
---|
| 1161 | /* |
---|
| 1162 | * Extract the ppp header of the new packet. |
---|
| 1163 | * The ppp header will be in one mbuf. |
---|
| 1164 | */ |
---|
| 1165 | cp = mtod(m, u_char *); |
---|
| 1166 | address = PPP_ADDRESS(cp); |
---|
| 1167 | control = PPP_CONTROL(cp); |
---|
| 1168 | protocol = PPP_PROTOCOL(cp); |
---|
| 1169 | |
---|
| 1170 | switch (protocol) { |
---|
| 1171 | case PPP_IP: |
---|
| 1172 | #ifdef VJC |
---|
| 1173 | /* |
---|
| 1174 | * If the packet is a TCP/IP packet, see if we can compress it. |
---|
| 1175 | */ |
---|
| 1176 | if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) { |
---|
| 1177 | struct ip *ip; |
---|
| 1178 | int type; |
---|
| 1179 | |
---|
| 1180 | mp = m; |
---|
| 1181 | ip = (struct ip *) (cp + PPP_HDRLEN); |
---|
| 1182 | if (mp->m_len <= PPP_HDRLEN) { |
---|
| 1183 | mp = mp->m_next; |
---|
| 1184 | if (mp == NULL) |
---|
| 1185 | break; |
---|
| 1186 | ip = mtod(mp, struct ip *); |
---|
| 1187 | } |
---|
| 1188 | /* this code assumes the IP/TCP header is in one non-shared mbuf */ |
---|
| 1189 | if (ip->ip_p == IPPROTO_TCP) { |
---|
| 1190 | type = vj_compress_tcp(mp, ip, sc->sc_comp, |
---|
| 1191 | !(sc->sc_flags & SC_NO_TCP_CCID)); |
---|
| 1192 | switch (type) { |
---|
| 1193 | case TYPE_UNCOMPRESSED_TCP: |
---|
| 1194 | protocol = PPP_VJC_UNCOMP; |
---|
| 1195 | break; |
---|
| 1196 | case TYPE_COMPRESSED_TCP: |
---|
| 1197 | protocol = PPP_VJC_COMP; |
---|
| 1198 | cp = mtod(m, u_char *); |
---|
| 1199 | cp[0] = address; /* header has moved */ |
---|
| 1200 | cp[1] = control; |
---|
| 1201 | cp[2] = 0; |
---|
| 1202 | break; |
---|
| 1203 | } |
---|
| 1204 | cp[3] = protocol; /* update protocol in PPP header */ |
---|
| 1205 | } |
---|
| 1206 | } |
---|
| 1207 | #endif /* VJC */ |
---|
| 1208 | break; |
---|
| 1209 | |
---|
| 1210 | #ifdef PPP_COMPRESS |
---|
| 1211 | case PPP_CCP: |
---|
| 1212 | ppp_ccp(sc, m, 0); |
---|
| 1213 | break; |
---|
| 1214 | #endif /* PPP_COMPRESS */ |
---|
| 1215 | } |
---|
| 1216 | |
---|
| 1217 | #ifdef PPP_COMPRESS |
---|
| 1218 | if (protocol != PPP_LCP && protocol != PPP_CCP |
---|
| 1219 | && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) { |
---|
| 1220 | struct mbuf *mcomp = NULL; |
---|
| 1221 | int slen, clen; |
---|
| 1222 | |
---|
| 1223 | slen = 0; |
---|
| 1224 | for (mp = m; mp != NULL; mp = mp->m_next) |
---|
| 1225 | slen += mp->m_len; |
---|
| 1226 | clen = (*sc->sc_xcomp->compress) |
---|
| 1227 | (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN); |
---|
| 1228 | if (mcomp != NULL) { |
---|
| 1229 | if (sc->sc_flags & SC_CCP_UP) { |
---|
| 1230 | /* Send the compressed packet instead of the original. */ |
---|
| 1231 | m_freem(m); |
---|
| 1232 | m = mcomp; |
---|
| 1233 | cp = mtod(m, u_char *); |
---|
| 1234 | protocol = cp[3]; |
---|
| 1235 | } else { |
---|
| 1236 | /* Can't transmit compressed packets until CCP is up. */ |
---|
| 1237 | m_freem(mcomp); |
---|
| 1238 | } |
---|
| 1239 | } |
---|
| 1240 | } |
---|
| 1241 | #endif /* PPP_COMPRESS */ |
---|
| 1242 | |
---|
| 1243 | /* |
---|
| 1244 | * Compress the address/control and protocol, if possible. |
---|
| 1245 | */ |
---|
| 1246 | if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS && |
---|
| 1247 | control == PPP_UI && protocol != PPP_ALLSTATIONS && |
---|
| 1248 | protocol != PPP_LCP) { |
---|
| 1249 | /* can compress address/control */ |
---|
| 1250 | m->m_data += 2; |
---|
| 1251 | m->m_len -= 2; |
---|
| 1252 | } |
---|
| 1253 | if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) { |
---|
| 1254 | /* can compress protocol */ |
---|
| 1255 | if (mtod(m, u_char *) == cp) { |
---|
| 1256 | cp[2] = cp[1]; /* move address/control up */ |
---|
| 1257 | cp[1] = cp[0]; |
---|
| 1258 | } |
---|
| 1259 | ++m->m_data; |
---|
| 1260 | --m->m_len; |
---|
| 1261 | } |
---|
| 1262 | |
---|
| 1263 | return m; |
---|
| 1264 | } |
---|
| 1265 | |
---|
| 1266 | /* |
---|
| 1267 | * Software interrupt routine, called at splsoftnet. |
---|
| 1268 | */ |
---|
| 1269 | void |
---|
[0286b9f] | 1270 | pppintr(void) |
---|
[85a0f07] | 1271 | { |
---|
| 1272 | } |
---|
| 1273 | |
---|
| 1274 | #ifdef PPP_COMPRESS |
---|
| 1275 | /* |
---|
| 1276 | * Handle a CCP packet. `rcvd' is 1 if the packet was received, |
---|
| 1277 | * 0 if it is about to be transmitted. |
---|
| 1278 | */ |
---|
| 1279 | static void |
---|
| 1280 | ppp_ccp(sc, m, rcvd) |
---|
| 1281 | struct ppp_softc *sc; |
---|
| 1282 | struct mbuf *m; |
---|
| 1283 | int rcvd; |
---|
| 1284 | { |
---|
| 1285 | u_char *dp, *ep; |
---|
| 1286 | struct mbuf *mp; |
---|
| 1287 | int slen, s; |
---|
| 1288 | |
---|
| 1289 | /* |
---|
| 1290 | * Get a pointer to the data after the PPP header. |
---|
| 1291 | */ |
---|
| 1292 | if (m->m_len <= PPP_HDRLEN) { |
---|
| 1293 | mp = m->m_next; |
---|
| 1294 | if (mp == NULL) |
---|
| 1295 | return; |
---|
| 1296 | dp = (mp != NULL)? mtod(mp, u_char *): NULL; |
---|
| 1297 | } else { |
---|
| 1298 | mp = m; |
---|
| 1299 | dp = mtod(mp, u_char *) + PPP_HDRLEN; |
---|
| 1300 | } |
---|
| 1301 | |
---|
| 1302 | ep = mtod(mp, u_char *) + mp->m_len; |
---|
| 1303 | if (dp + CCP_HDRLEN > ep) |
---|
| 1304 | return; |
---|
| 1305 | slen = CCP_LENGTH(dp); |
---|
| 1306 | if (dp + slen > ep) { |
---|
| 1307 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1308 | printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n", |
---|
| 1309 | dp, slen, mtod(mp, u_char *), mp->m_len); |
---|
| 1310 | return; |
---|
| 1311 | } |
---|
| 1312 | |
---|
| 1313 | switch (CCP_CODE(dp)) { |
---|
| 1314 | case CCP_CONFREQ: |
---|
| 1315 | case CCP_TERMREQ: |
---|
| 1316 | case CCP_TERMACK: |
---|
| 1317 | /* CCP must be going down - disable compression */ |
---|
| 1318 | if (sc->sc_flags & SC_CCP_UP) { |
---|
| 1319 | s = splimp(); |
---|
| 1320 | sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN); |
---|
| 1321 | splx(s); |
---|
| 1322 | } |
---|
| 1323 | break; |
---|
| 1324 | |
---|
| 1325 | case CCP_CONFACK: |
---|
| 1326 | if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP) |
---|
| 1327 | && slen >= CCP_HDRLEN + CCP_OPT_MINLEN |
---|
| 1328 | && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) { |
---|
| 1329 | if (!rcvd) { |
---|
| 1330 | /* we're agreeing to send compressed packets. */ |
---|
| 1331 | if (sc->sc_xc_state != NULL |
---|
| 1332 | && (*sc->sc_xcomp->comp_init) |
---|
| 1333 | (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, |
---|
| 1334 | sc->sc_if.if_unit, 0, sc->sc_flags & SC_DEBUG)) { |
---|
| 1335 | s = splimp(); |
---|
| 1336 | sc->sc_flags |= SC_COMP_RUN; |
---|
| 1337 | splx(s); |
---|
| 1338 | } |
---|
| 1339 | } else { |
---|
| 1340 | /* peer is agreeing to send compressed packets. */ |
---|
| 1341 | if (sc->sc_rc_state != NULL |
---|
| 1342 | && (*sc->sc_rcomp->decomp_init) |
---|
| 1343 | (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, |
---|
| 1344 | sc->sc_if.if_unit, 0, sc->sc_mru, |
---|
| 1345 | sc->sc_flags & SC_DEBUG)) { |
---|
| 1346 | s = splimp(); |
---|
| 1347 | sc->sc_flags |= SC_DECOMP_RUN; |
---|
| 1348 | sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR); |
---|
| 1349 | splx(s); |
---|
| 1350 | } |
---|
| 1351 | } |
---|
| 1352 | } |
---|
| 1353 | break; |
---|
| 1354 | |
---|
| 1355 | case CCP_RESETACK: |
---|
| 1356 | if (sc->sc_flags & SC_CCP_UP) { |
---|
| 1357 | if (!rcvd) { |
---|
| 1358 | if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) |
---|
| 1359 | (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state); |
---|
| 1360 | } else { |
---|
| 1361 | if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { |
---|
| 1362 | (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state); |
---|
| 1363 | s = splimp(); |
---|
| 1364 | sc->sc_flags &= ~SC_DC_ERROR; |
---|
| 1365 | splx(s); |
---|
| 1366 | } |
---|
| 1367 | } |
---|
| 1368 | } |
---|
| 1369 | break; |
---|
| 1370 | } |
---|
| 1371 | } |
---|
| 1372 | |
---|
| 1373 | /* |
---|
| 1374 | * CCP is down; free (de)compressor state if necessary. |
---|
| 1375 | */ |
---|
| 1376 | static void |
---|
| 1377 | ppp_ccp_closed(sc) |
---|
| 1378 | struct ppp_softc *sc; |
---|
| 1379 | { |
---|
| 1380 | if (sc->sc_xc_state) { |
---|
| 1381 | (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); |
---|
| 1382 | sc->sc_xc_state = NULL; |
---|
| 1383 | } |
---|
| 1384 | if (sc->sc_rc_state) { |
---|
| 1385 | (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); |
---|
| 1386 | sc->sc_rc_state = NULL; |
---|
| 1387 | } |
---|
| 1388 | } |
---|
| 1389 | #endif /* PPP_COMPRESS */ |
---|
| 1390 | |
---|
| 1391 | /* |
---|
| 1392 | * Process a received PPP packet, doing decompression as necessary. |
---|
| 1393 | * Should be called at splsoftnet. |
---|
| 1394 | */ |
---|
| 1395 | #define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \ |
---|
| 1396 | TYPE_UNCOMPRESSED_TCP) |
---|
| 1397 | |
---|
[0286b9f] | 1398 | static struct mbuf * |
---|
[85a0f07] | 1399 | ppp_inproc(sc, m) |
---|
| 1400 | struct ppp_softc *sc; |
---|
| 1401 | struct mbuf *m; |
---|
| 1402 | { |
---|
[0286b9f] | 1403 | struct mbuf *mf = (struct mbuf *)0; |
---|
[85a0f07] | 1404 | struct ifnet *ifp = &sc->sc_if; |
---|
| 1405 | struct ifqueue *inq; |
---|
[cb1e8a46] | 1406 | int s, ilen, proto, rv; |
---|
[85a0f07] | 1407 | u_char *cp, adrs, ctrl; |
---|
[78d6a50] | 1408 | struct mbuf *mp; |
---|
| 1409 | #ifdef PPP_COMPRESS |
---|
[0286b9f] | 1410 | struct mbuf *dmp = NULL; |
---|
[78d6a50] | 1411 | #endif |
---|
[cb1e8a46] | 1412 | #ifdef VJC |
---|
[85a0f07] | 1413 | u_char *iphdr; |
---|
[cb1e8a46] | 1414 | u_int hlen; |
---|
| 1415 | int xlen; |
---|
| 1416 | #endif |
---|
[85a0f07] | 1417 | |
---|
| 1418 | sc->sc_stats.ppp_ipackets++; |
---|
| 1419 | |
---|
| 1420 | if (sc->sc_flags & SC_LOG_INPKT) { |
---|
| 1421 | ilen = 0; |
---|
| 1422 | for (mp = m; mp != NULL; mp = mp->m_next) |
---|
| 1423 | ilen += mp->m_len; |
---|
| 1424 | printf("ppp%d: got %d bytes\n", ifp->if_unit, ilen); |
---|
| 1425 | pppdumpm(m); |
---|
| 1426 | } |
---|
| 1427 | |
---|
| 1428 | cp = mtod(m, u_char *); |
---|
| 1429 | adrs = PPP_ADDRESS(cp); |
---|
| 1430 | ctrl = PPP_CONTROL(cp); |
---|
| 1431 | proto = PPP_PROTOCOL(cp); |
---|
| 1432 | |
---|
| 1433 | if (m->m_flags & M_ERRMARK) { |
---|
| 1434 | m->m_flags &= ~M_ERRMARK; |
---|
| 1435 | s = splimp(); |
---|
| 1436 | sc->sc_flags |= SC_VJ_RESET; |
---|
| 1437 | splx(s); |
---|
| 1438 | } |
---|
| 1439 | |
---|
| 1440 | #ifdef PPP_COMPRESS |
---|
| 1441 | /* |
---|
| 1442 | * Decompress this packet if necessary, update the receiver's |
---|
| 1443 | * dictionary, or take appropriate action on a CCP packet. |
---|
| 1444 | */ |
---|
| 1445 | if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN) |
---|
| 1446 | && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) { |
---|
| 1447 | /* decompress this packet */ |
---|
| 1448 | rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp); |
---|
| 1449 | if (rv == DECOMP_OK) { |
---|
| 1450 | m_freem(m); |
---|
| 1451 | if (dmp == NULL) { |
---|
| 1452 | /* no error, but no decompressed packet produced */ |
---|
[0286b9f] | 1453 | return mf; |
---|
[85a0f07] | 1454 | } |
---|
| 1455 | m = dmp; |
---|
| 1456 | cp = mtod(m, u_char *); |
---|
| 1457 | proto = PPP_PROTOCOL(cp); |
---|
| 1458 | |
---|
| 1459 | } else { |
---|
| 1460 | /* |
---|
| 1461 | * An error has occurred in decompression. |
---|
| 1462 | * Pass the compressed packet up to pppd, which may take |
---|
| 1463 | * CCP down or issue a Reset-Req. |
---|
| 1464 | */ |
---|
| 1465 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1466 | printf("ppp%d: decompress failed %d\n", ifp->if_unit, rv); |
---|
| 1467 | s = splimp(); |
---|
| 1468 | sc->sc_flags |= SC_VJ_RESET; |
---|
| 1469 | if (rv == DECOMP_ERROR) |
---|
| 1470 | sc->sc_flags |= SC_DC_ERROR; |
---|
| 1471 | else |
---|
| 1472 | sc->sc_flags |= SC_DC_FERROR; |
---|
| 1473 | splx(s); |
---|
| 1474 | } |
---|
| 1475 | |
---|
| 1476 | } else { |
---|
| 1477 | if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { |
---|
| 1478 | (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m); |
---|
| 1479 | } |
---|
| 1480 | if (proto == PPP_CCP) { |
---|
| 1481 | ppp_ccp(sc, m, 1); |
---|
| 1482 | } |
---|
| 1483 | } |
---|
| 1484 | #endif |
---|
| 1485 | |
---|
| 1486 | ilen = 0; |
---|
| 1487 | for (mp = m; mp != NULL; mp = mp->m_next) |
---|
| 1488 | ilen += mp->m_len; |
---|
| 1489 | |
---|
| 1490 | #ifdef VJC |
---|
| 1491 | if (sc->sc_flags & SC_VJ_RESET) { |
---|
| 1492 | /* |
---|
| 1493 | * If we've missed a packet, we must toss subsequent compressed |
---|
| 1494 | * packets which don't have an explicit connection ID. |
---|
| 1495 | */ |
---|
| 1496 | if (sc->sc_comp) |
---|
| 1497 | vj_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp); |
---|
| 1498 | s = splimp(); |
---|
| 1499 | sc->sc_flags &= ~SC_VJ_RESET; |
---|
| 1500 | splx(s); |
---|
| 1501 | } |
---|
| 1502 | |
---|
| 1503 | /* |
---|
| 1504 | * See if we have a VJ-compressed packet to uncompress. |
---|
| 1505 | */ |
---|
| 1506 | if (proto == PPP_VJC_COMP) { |
---|
| 1507 | if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) |
---|
| 1508 | goto bad; |
---|
| 1509 | |
---|
| 1510 | xlen = vj_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, |
---|
| 1511 | ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP, |
---|
| 1512 | sc->sc_comp, &iphdr, &hlen); |
---|
| 1513 | |
---|
| 1514 | if (xlen <= 0) { |
---|
| 1515 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1516 | printf("ppp%d: VJ uncompress failed on type comp\n", |
---|
| 1517 | ifp->if_unit); |
---|
| 1518 | goto bad; |
---|
| 1519 | } |
---|
| 1520 | |
---|
| 1521 | /* Copy the PPP and IP headers into a new mbuf. */ |
---|
| 1522 | MGETHDR(mp, M_DONTWAIT, MT_DATA); |
---|
| 1523 | if (mp == NULL) |
---|
| 1524 | goto bad; |
---|
| 1525 | mp->m_len = 0; |
---|
| 1526 | mp->m_next = NULL; |
---|
| 1527 | if (hlen + PPP_HDRLEN > MHLEN) { |
---|
| 1528 | MCLGET(mp, M_DONTWAIT); |
---|
| 1529 | if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) { |
---|
| 1530 | m_freem(mp); |
---|
| 1531 | goto bad; /* lose if big headers and no clusters */ |
---|
| 1532 | } |
---|
| 1533 | } |
---|
| 1534 | cp = mtod(mp, u_char *); |
---|
| 1535 | cp[0] = adrs; |
---|
| 1536 | cp[1] = ctrl; |
---|
| 1537 | cp[2] = 0; |
---|
| 1538 | cp[3] = PPP_IP; |
---|
| 1539 | proto = PPP_IP; |
---|
| 1540 | bcopy(iphdr, cp + PPP_HDRLEN, hlen); |
---|
| 1541 | mp->m_len = hlen + PPP_HDRLEN; |
---|
| 1542 | |
---|
| 1543 | /* |
---|
| 1544 | * Trim the PPP and VJ headers off the old mbuf |
---|
| 1545 | * and stick the new and old mbufs together. |
---|
| 1546 | */ |
---|
| 1547 | m->m_data += PPP_HDRLEN + xlen; |
---|
| 1548 | m->m_len -= PPP_HDRLEN + xlen; |
---|
| 1549 | if (m->m_len <= M_TRAILINGSPACE(mp)) { |
---|
| 1550 | bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len); |
---|
| 1551 | mp->m_len += m->m_len; |
---|
| 1552 | MFREE(m, mp->m_next); |
---|
| 1553 | } else |
---|
| 1554 | mp->m_next = m; |
---|
| 1555 | m = mp; |
---|
| 1556 | ilen += hlen - xlen; |
---|
| 1557 | |
---|
| 1558 | } else if (proto == PPP_VJC_UNCOMP) { |
---|
| 1559 | if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) |
---|
| 1560 | goto bad; |
---|
| 1561 | |
---|
| 1562 | xlen = vj_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, |
---|
| 1563 | ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP, |
---|
| 1564 | sc->sc_comp, &iphdr, &hlen); |
---|
| 1565 | |
---|
| 1566 | if (xlen < 0) { |
---|
| 1567 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1568 | printf("ppp%d: VJ uncompress failed on type uncomp\n", |
---|
| 1569 | ifp->if_unit); |
---|
| 1570 | goto bad; |
---|
| 1571 | } |
---|
| 1572 | |
---|
| 1573 | proto = PPP_IP; |
---|
| 1574 | cp[3] = PPP_IP; |
---|
| 1575 | } |
---|
| 1576 | #endif /* VJC */ |
---|
| 1577 | |
---|
| 1578 | /* |
---|
| 1579 | * If the packet will fit in a header mbuf, don't waste a |
---|
| 1580 | * whole cluster on it. |
---|
| 1581 | */ |
---|
| 1582 | if (ilen <= MHLEN && M_IS_CLUSTER(m)) { |
---|
| 1583 | MGETHDR(mp, M_DONTWAIT, MT_DATA); |
---|
| 1584 | if (mp != NULL) { |
---|
| 1585 | m_copydata(m, 0, ilen, mtod(mp, caddr_t)); |
---|
[0286b9f] | 1586 | /* instead of freeing - return cluster mbuf so it can be reused */ |
---|
| 1587 | /* m_freem(m); */ |
---|
| 1588 | mf = m; |
---|
[85a0f07] | 1589 | m = mp; |
---|
| 1590 | m->m_len = ilen; |
---|
| 1591 | } |
---|
| 1592 | } |
---|
| 1593 | m->m_pkthdr.len = ilen; |
---|
| 1594 | m->m_pkthdr.rcvif = ifp; |
---|
| 1595 | |
---|
| 1596 | if ((proto & 0x8000) == 0) { |
---|
| 1597 | #ifdef PPP_FILTER |
---|
| 1598 | /* |
---|
| 1599 | * See whether we want to pass this packet, and |
---|
| 1600 | * if it counts as link activity. |
---|
| 1601 | */ |
---|
| 1602 | adrs = *mtod(m, u_char *); /* save address field */ |
---|
| 1603 | *mtod(m, u_char *) = 0; /* indicate inbound */ |
---|
| 1604 | if (sc->sc_pass_filt.bf_insns != 0 |
---|
| 1605 | && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m, |
---|
| 1606 | ilen, 0) == 0) { |
---|
| 1607 | /* drop this packet */ |
---|
| 1608 | m_freem(m); |
---|
[0286b9f] | 1609 | return mf; |
---|
[85a0f07] | 1610 | } |
---|
| 1611 | if (sc->sc_active_filt.bf_insns == 0 |
---|
| 1612 | || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m, ilen, 0)) |
---|
[0286b9f] | 1613 | sc->sc_last_recv = time.tv_sec; |
---|
[85a0f07] | 1614 | |
---|
| 1615 | *mtod(m, u_char *) = adrs; |
---|
| 1616 | #else |
---|
| 1617 | /* |
---|
| 1618 | * Record the time that we received this packet. |
---|
| 1619 | */ |
---|
| 1620 | microtime(&ppp_time); |
---|
| 1621 | sc->sc_last_recv = ppp_time.tv_sec; |
---|
| 1622 | #endif /* PPP_FILTER */ |
---|
| 1623 | } |
---|
| 1624 | |
---|
| 1625 | #if NBPFILTER > 0 |
---|
| 1626 | /* See if bpf wants to look at the packet. */ |
---|
| 1627 | if (sc->sc_bpf) |
---|
| 1628 | bpf_mtap(sc->sc_bpf, m); |
---|
| 1629 | #endif |
---|
| 1630 | |
---|
| 1631 | rv = 0; |
---|
| 1632 | switch (proto) { |
---|
| 1633 | #ifdef INET |
---|
| 1634 | case PPP_IP: |
---|
| 1635 | /* |
---|
| 1636 | * IP packet - take off the ppp header and pass it up to IP. |
---|
| 1637 | */ |
---|
| 1638 | if ((ifp->if_flags & IFF_UP) == 0 |
---|
| 1639 | || sc->sc_npmode[NP_IP] != NPMODE_PASS) { |
---|
| 1640 | /* interface is down - drop the packet. */ |
---|
| 1641 | m_freem(m); |
---|
[0286b9f] | 1642 | return mf; |
---|
[85a0f07] | 1643 | } |
---|
| 1644 | m->m_pkthdr.len -= PPP_HDRLEN; |
---|
| 1645 | m->m_data += PPP_HDRLEN; |
---|
| 1646 | m->m_len -= PPP_HDRLEN; |
---|
| 1647 | schednetisr(NETISR_IP); |
---|
| 1648 | inq = &ipintrq; |
---|
| 1649 | break; |
---|
| 1650 | #endif |
---|
| 1651 | |
---|
| 1652 | default: |
---|
| 1653 | /* |
---|
| 1654 | * Some other protocol - place on input queue for read(). |
---|
| 1655 | */ |
---|
| 1656 | inq = &sc->sc_inq; |
---|
| 1657 | rv = 1; |
---|
| 1658 | break; |
---|
| 1659 | } |
---|
| 1660 | |
---|
| 1661 | /* |
---|
| 1662 | * Put the packet on the appropriate input queue. |
---|
| 1663 | */ |
---|
| 1664 | s = splimp(); |
---|
| 1665 | if (IF_QFULL(inq)) { |
---|
| 1666 | IF_DROP(inq); |
---|
| 1667 | splx(s); |
---|
| 1668 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1669 | printf("ppp%d: input queue full\n", ifp->if_unit); |
---|
| 1670 | ifp->if_iqdrops++; |
---|
| 1671 | goto bad; |
---|
| 1672 | } |
---|
| 1673 | IF_ENQUEUE(inq, m); |
---|
| 1674 | splx(s); |
---|
[0286b9f] | 1675 | |
---|
[85a0f07] | 1676 | ifp->if_ipackets++; |
---|
| 1677 | ifp->if_ibytes += ilen; |
---|
[0286b9f] | 1678 | microtime(&ppp_time); |
---|
[85a0f07] | 1679 | ifp->if_lastchange = ppp_time; |
---|
| 1680 | |
---|
[0286b9f] | 1681 | if (rv) { |
---|
| 1682 | (*sc->sc_ctlp)(sc); |
---|
| 1683 | } |
---|
[85a0f07] | 1684 | |
---|
[0286b9f] | 1685 | return mf; |
---|
[85a0f07] | 1686 | |
---|
| 1687 | bad: |
---|
| 1688 | m_freem(m); |
---|
| 1689 | sc->sc_if.if_ierrors++; |
---|
| 1690 | sc->sc_stats.ppp_ierrors++; |
---|
[0286b9f] | 1691 | return mf; |
---|
[85a0f07] | 1692 | } |
---|
| 1693 | |
---|
| 1694 | #define MAX_DUMP_BYTES 128 |
---|
| 1695 | |
---|
| 1696 | static void |
---|
| 1697 | pppdumpm(m0) |
---|
| 1698 | struct mbuf *m0; |
---|
| 1699 | { |
---|
| 1700 | char buf[3*MAX_DUMP_BYTES+4]; |
---|
| 1701 | char *bp = buf; |
---|
| 1702 | struct mbuf *m; |
---|
| 1703 | static char digits[] = "0123456789abcdef"; |
---|
| 1704 | |
---|
| 1705 | for (m = m0; m; m = m->m_next) { |
---|
| 1706 | int l = m->m_len; |
---|
| 1707 | u_char *rptr = (u_char *)m->m_data; |
---|
| 1708 | |
---|
| 1709 | while (l--) { |
---|
| 1710 | if (bp > buf + sizeof(buf) - 4) |
---|
| 1711 | goto done; |
---|
| 1712 | *bp++ = digits[*rptr >> 4]; /* convert byte to ascii hex */ |
---|
| 1713 | *bp++ = digits[*rptr++ & 0xf]; |
---|
| 1714 | } |
---|
| 1715 | |
---|
| 1716 | if (m->m_next) { |
---|
| 1717 | if (bp > buf + sizeof(buf) - 3) |
---|
| 1718 | goto done; |
---|
| 1719 | *bp++ = '|'; |
---|
| 1720 | } else |
---|
| 1721 | *bp++ = ' '; |
---|
| 1722 | } |
---|
| 1723 | done: |
---|
| 1724 | if (m) |
---|
| 1725 | *bp++ = '>'; |
---|
| 1726 | *bp = 0; |
---|
| 1727 | printf("%s\n", buf); |
---|
| 1728 | } |
---|
| 1729 | |
---|
| 1730 | #endif /* NPPP > 0 */ |
---|