[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 | int iprocess = (int )0; |
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| 247 | struct ppp_softc *sc = (struct ppp_softc *)arg; |
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| 248 | struct mbuf *mp; |
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| 249 | struct mbuf *mf; |
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| 250 | struct mbuf *m; |
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| 251 | struct rtems_termios_tty *tp; |
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| 252 | |
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| 253 | /* enter processing loop */ |
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| 254 | while ( 1 ) { |
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| 255 | /* wait for event */ |
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| 256 | rtems_event_receive(TX_PACKET|TX_TRANSMIT,RTEMS_WAIT|RTEMS_EVENT_ANY,RTEMS_NO_TIMEOUT,&events); |
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| 257 | if ( events & TX_TRANSMIT ) { |
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| 258 | /* received event from interrupt handler - free current mbuf */ |
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| 259 | rtems_bsdnet_semaphore_obtain(); |
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| 260 | m_freem(sc->sc_outm); |
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| 261 | rtems_bsdnet_semaphore_release(); |
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| 262 | |
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| 263 | /* chain is done - clear the values */ |
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| 264 | sc->sc_outm = (struct mbuf *)0; |
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| 265 | sc->sc_outmc = (struct mbuf *)0; |
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| 266 | |
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| 267 | /* now set flag to fake receive of TX_PACKET event */ |
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| 268 | /* this will check to see if we have any pending packets */ |
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| 269 | events |= TX_PACKET; |
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| 270 | } |
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| 271 | |
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| 272 | /* received event from pppasyncstart */ |
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| 273 | if ( events & TX_PACKET ) { |
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| 274 | /* ensure we are not busy */ |
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| 275 | if ( sc->sc_outm == (struct mbuf *)0 ) { |
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| 276 | /* try dequeuing a packet */ |
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| 277 | sc->sc_outm = ppp_dequeue(sc); |
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| 278 | if ( sc->sc_outm == NULL ) { |
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| 279 | /* clear output flags */ |
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| 280 | sc->sc_outflag = 0; |
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| 281 | sc->sc_if.if_flags &= ~IFF_OACTIVE; |
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| 282 | } |
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| 283 | else { |
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| 284 | /* set flag to start process */ |
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| 285 | iprocess = 1; |
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| 286 | sc->sc_outflag = SC_TX_BUSY; |
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| 287 | sc->sc_if.if_flags |= IFF_OACTIVE; |
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| 288 | } |
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| 289 | } |
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| 290 | } |
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| 291 | |
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| 292 | /* check to see if there is any processing required */ |
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| 293 | if ( iprocess ) { |
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| 294 | /* clear process flag */ |
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| 295 | iprocess = (int)0; |
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| 296 | |
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| 297 | /* initialize output values */ |
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| 298 | sc->sc_outfcs = PPP_INITFCS; |
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| 299 | sc->sc_outbuf = (u_char *)0; |
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| 300 | sc->sc_outlen = (short )0; |
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| 301 | sc->sc_outoff = (short )0; |
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| 302 | sc->sc_outfcslen = (short )0; |
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| 303 | |
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| 304 | /* loop over all mbufs in chain */ |
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| 305 | mf = NULL; |
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| 306 | mp = NULL; |
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| 307 | m = sc->sc_outm; |
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| 308 | while (( m != (struct mbuf *)0 ) && ( m->m_len > 0 )) { |
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| 309 | /* check to see if first mbuf value has been set */ |
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| 310 | if ( sc->sc_outmc == (struct mbuf *)0 ) { |
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| 311 | /* set values to start with this mbuf */ |
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| 312 | sc->sc_outmc = m; |
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| 313 | sc->sc_outlen = m->m_len; |
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| 314 | sc->sc_outbuf = mtod(m, u_char *); |
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| 315 | } |
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| 316 | |
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| 317 | /* update the FCS value and then check next packet length */ |
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| 318 | sc->sc_outfcs = pppfcs(sc->sc_outfcs, mtod(m, u_char *), m->m_len); |
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| 319 | |
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| 320 | /* check next packet to see if it is empty */ |
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| 321 | while (( m->m_next != NULL ) && ( m->m_next->m_len == 0 )) { |
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| 322 | /* next mbuf is zero length */ |
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| 323 | /* add empty mbuf to free chain */ |
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| 324 | if ( mp == NULL ) { |
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| 325 | /* item is head of free list */ |
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| 326 | mf = m->m_next; |
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| 327 | mp = mf; |
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| 328 | } |
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| 329 | else { |
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| 330 | /* add item to end of the free list */ |
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| 331 | mp->m_next = m->m_next; |
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| 332 | mp = m->m_next; |
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| 333 | } |
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| 334 | |
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| 335 | /* remove empty item from process chain */ |
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| 336 | m->m_next = m->m_next->m_next; |
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| 337 | mp->m_next = NULL; |
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| 338 | } |
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| 339 | |
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| 340 | /* move to next packet */ |
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| 341 | m = m->m_next; |
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| 342 | } |
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| 343 | |
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| 344 | /* ensure there is data to be sent out */ |
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| 345 | tp = (struct rtems_termios_tty *)sc->sc_devp; |
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| 346 | if (( tp != NULL ) && ( sc->sc_outmc != (struct mbuf *)0 )) { |
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| 347 | /* place FCS value into buffer */ |
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| 348 | sc->sc_outfcsbuf[sc->sc_outfcslen++] = ~sc->sc_outfcs & 0xff; |
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| 349 | sc->sc_outfcsbuf[sc->sc_outfcslen++] = (~sc->sc_outfcs >> 8) & 0xff; |
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| 350 | microtime(&sc->sc_if.if_lastchange); |
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| 351 | |
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| 352 | /* write out frame byte to start the transmission */ |
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[f4c118d] | 353 | sc->sc_outchar = (u_char)PPP_FLAG; |
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| 354 | (*tp->device.write)(tp->minor, &sc->sc_outchar, 1); |
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[0286b9f] | 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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[fd55b7d] | 381 | status = rtems_task_create(rtems_build_name('R','x','P','0'+sc->sc_if.if_unit), priority, 2048, |
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[0286b9f] | 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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[fd55b7d] | 396 | status = rtems_task_create(rtems_build_name('T','x','P','0'+sc->sc_if.if_unit), priority, 2048, |
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[0286b9f] | 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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[fd55b7d] | 412 | /* ilya: IFF_RUNNING flag will be marked after the IPCP goes up */ |
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| 413 | /* sc->sc_if.if_flags |= IFF_RUNNING; */ |
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[0286b9f] | 414 | } |
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[85a0f07] | 415 | |
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| 416 | /* |
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| 417 | * Called from boot code to establish ppp interfaces. |
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| 418 | */ |
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[0286b9f] | 419 | int rtems_ppp_driver_attach(struct rtems_bsdnet_ifconfig *config, int attaching) |
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[85a0f07] | 420 | { |
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[fd55b7d] | 421 | /* int i = (int)0; */ |
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[0286b9f] | 422 | struct ppp_softc *sc; |
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[fd55b7d] | 423 | char *name; |
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| 424 | int number; |
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| 425 | |
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| 426 | |
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| 427 | number = rtems_bsdnet_parse_driver_name (config, &name); |
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| 428 | |
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| 429 | if (!attaching || (number >= NPPP)) |
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| 430 | return 0; |
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| 431 | |
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| 432 | sc = &ppp_softc[number]; |
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| 433 | |
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| 434 | if (sc->sc_if.if_name != NULL) |
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| 435 | return 0; /* interface is already attached */ |
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| 436 | |
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| 437 | /* for (sc = ppp_softc; i < NPPP; sc++) { */ |
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| 438 | sc->sc_if.if_name = name /*"ppp"*/; |
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| 439 | sc->sc_if.if_unit = number /*i++*/; |
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[85a0f07] | 440 | sc->sc_if.if_mtu = PPP_MTU; |
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| 441 | sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; |
---|
| 442 | sc->sc_if.if_type = IFT_PPP; |
---|
| 443 | sc->sc_if.if_hdrlen = PPP_HDRLEN; |
---|
| 444 | sc->sc_if.if_ioctl = pppsioctl; |
---|
| 445 | sc->sc_if.if_output = pppoutput; |
---|
| 446 | sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN; |
---|
| 447 | sc->sc_inq.ifq_maxlen = IFQ_MAXLEN; |
---|
| 448 | sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN; |
---|
| 449 | sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN; |
---|
[0286b9f] | 450 | sc->sc_freeq.ifq_maxlen = NUM_MBUFQ; |
---|
| 451 | |
---|
| 452 | /* initialize and attach */ |
---|
| 453 | ppp_init(sc); |
---|
[85a0f07] | 454 | if_attach(&sc->sc_if); |
---|
| 455 | #if NBPFILTER > 0 |
---|
| 456 | bpfattach(&sc->sc_bpf, &sc->sc_if, DLT_PPP, PPP_HDRLEN); |
---|
| 457 | #endif |
---|
[fd55b7d] | 458 | /* } */ |
---|
[0286b9f] | 459 | |
---|
| 460 | return ( 1 ); |
---|
[85a0f07] | 461 | } |
---|
| 462 | |
---|
| 463 | /* |
---|
| 464 | * Allocate a ppp interface unit and initialize it. |
---|
| 465 | */ |
---|
| 466 | struct ppp_softc * |
---|
| 467 | pppalloc(pid) |
---|
| 468 | pid_t pid; |
---|
| 469 | { |
---|
| 470 | int nppp, i; |
---|
| 471 | struct ppp_softc *sc; |
---|
[0286b9f] | 472 | |
---|
[85a0f07] | 473 | for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++) |
---|
| 474 | if (sc->sc_xfer == pid) { |
---|
| 475 | sc->sc_xfer = 0; |
---|
| 476 | return sc; |
---|
| 477 | } |
---|
| 478 | for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++) |
---|
| 479 | if (sc->sc_devp == NULL) |
---|
| 480 | break; |
---|
| 481 | if (nppp >= NPPP) |
---|
| 482 | return NULL; |
---|
| 483 | |
---|
| 484 | sc->sc_flags = 0; |
---|
| 485 | sc->sc_mru = PPP_MRU; |
---|
| 486 | sc->sc_relinq = NULL; |
---|
| 487 | bzero((char *)&sc->sc_stats, sizeof(sc->sc_stats)); |
---|
| 488 | #ifdef VJC |
---|
[0286b9f] | 489 | MALLOC(sc->sc_comp, struct vjcompress *, sizeof(struct vjcompress), |
---|
| 490 | M_DEVBUF, M_NOWAIT); |
---|
[85a0f07] | 491 | if (sc->sc_comp) |
---|
| 492 | vj_compress_init(sc->sc_comp, -1); |
---|
| 493 | #endif |
---|
| 494 | #ifdef PPP_COMPRESS |
---|
| 495 | sc->sc_xc_state = NULL; |
---|
| 496 | sc->sc_rc_state = NULL; |
---|
| 497 | #endif /* PPP_COMPRESS */ |
---|
| 498 | for (i = 0; i < NUM_NP; ++i) |
---|
| 499 | sc->sc_npmode[i] = NPMODE_ERROR; |
---|
| 500 | sc->sc_npqueue = NULL; |
---|
| 501 | sc->sc_npqtail = &sc->sc_npqueue; |
---|
[0286b9f] | 502 | microtime(&ppp_time); |
---|
[85a0f07] | 503 | sc->sc_last_sent = sc->sc_last_recv = ppp_time.tv_sec; |
---|
| 504 | |
---|
| 505 | return sc; |
---|
| 506 | } |
---|
| 507 | |
---|
| 508 | /* |
---|
| 509 | * Deallocate a ppp unit. Must be called at splsoftnet or higher. |
---|
| 510 | */ |
---|
| 511 | void |
---|
| 512 | pppdealloc(sc) |
---|
| 513 | struct ppp_softc *sc; |
---|
| 514 | { |
---|
| 515 | struct mbuf *m; |
---|
[0286b9f] | 516 | rtems_interrupt_level level; |
---|
[85a0f07] | 517 | |
---|
| 518 | if_down(&sc->sc_if); |
---|
| 519 | sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING); |
---|
| 520 | sc->sc_devp = NULL; |
---|
| 521 | sc->sc_xfer = 0; |
---|
[0286b9f] | 522 | |
---|
| 523 | rtems_interrupt_disable(level); |
---|
| 524 | if ( sc->sc_m != NULL ) { |
---|
| 525 | m_freem(sc->sc_m); |
---|
| 526 | sc->sc_m = (struct mbuf *)0; |
---|
| 527 | } |
---|
| 528 | if ( sc->sc_outm != NULL ) { |
---|
| 529 | m_freem(sc->sc_outm); |
---|
| 530 | sc->sc_outm = (struct mbuf *)0; |
---|
| 531 | sc->sc_outmc = (struct mbuf *)0; |
---|
| 532 | sc->sc_outflag = 0; |
---|
[85a0f07] | 533 | } |
---|
[0286b9f] | 534 | do { |
---|
| 535 | IF_DEQUEUE(&sc->sc_freeq, m); |
---|
| 536 | if (m != NULL) { |
---|
| 537 | m_freem(m); |
---|
| 538 | } |
---|
| 539 | } while ( m != NULL ); |
---|
| 540 | do { |
---|
| 541 | IF_DEQUEUE(&sc->sc_rawq, m); |
---|
| 542 | if (m != NULL) { |
---|
| 543 | m_freem(m); |
---|
| 544 | } |
---|
| 545 | } while ( m != NULL ); |
---|
| 546 | rtems_interrupt_enable(level); |
---|
| 547 | |
---|
[85a0f07] | 548 | for (;;) { |
---|
| 549 | IF_DEQUEUE(&sc->sc_inq, m); |
---|
| 550 | if (m == NULL) |
---|
| 551 | break; |
---|
| 552 | m_freem(m); |
---|
| 553 | } |
---|
| 554 | for (;;) { |
---|
| 555 | IF_DEQUEUE(&sc->sc_fastq, m); |
---|
| 556 | if (m == NULL) |
---|
| 557 | break; |
---|
| 558 | m_freem(m); |
---|
| 559 | } |
---|
| 560 | while ((m = sc->sc_npqueue) != NULL) { |
---|
| 561 | sc->sc_npqueue = m->m_nextpkt; |
---|
| 562 | m_freem(m); |
---|
| 563 | } |
---|
| 564 | #ifdef PPP_COMPRESS |
---|
| 565 | ppp_ccp_closed(sc); |
---|
| 566 | sc->sc_xc_state = NULL; |
---|
| 567 | sc->sc_rc_state = NULL; |
---|
| 568 | #endif /* PPP_COMPRESS */ |
---|
| 569 | #ifdef PPP_FILTER |
---|
| 570 | if (sc->sc_pass_filt.bf_insns != 0) { |
---|
[0286b9f] | 571 | FREE(sc->sc_pass_filt.bf_insns, M_DEVBUF); |
---|
[85a0f07] | 572 | sc->sc_pass_filt.bf_insns = 0; |
---|
| 573 | sc->sc_pass_filt.bf_len = 0; |
---|
| 574 | } |
---|
| 575 | if (sc->sc_active_filt.bf_insns != 0) { |
---|
[0286b9f] | 576 | FREE(sc->sc_active_filt.bf_insns, M_DEVBUF); |
---|
[85a0f07] | 577 | sc->sc_active_filt.bf_insns = 0; |
---|
| 578 | sc->sc_active_filt.bf_len = 0; |
---|
| 579 | } |
---|
| 580 | #endif /* PPP_FILTER */ |
---|
| 581 | #ifdef VJC |
---|
| 582 | if (sc->sc_comp != 0) { |
---|
[0286b9f] | 583 | FREE(sc->sc_comp, M_DEVBUF); |
---|
[85a0f07] | 584 | sc->sc_comp = 0; |
---|
| 585 | } |
---|
| 586 | #endif |
---|
| 587 | } |
---|
| 588 | |
---|
| 589 | /* |
---|
| 590 | * Ioctl routine for generic ppp devices. |
---|
| 591 | */ |
---|
| 592 | int |
---|
| 593 | pppioctl(sc, cmd, data, flag, p) |
---|
| 594 | struct ppp_softc *sc; |
---|
| 595 | int cmd; |
---|
| 596 | caddr_t data; |
---|
| 597 | int flag; |
---|
| 598 | struct proc *p; |
---|
| 599 | { |
---|
[0286b9f] | 600 | int s, flags, mru, npx, taskid; |
---|
[85a0f07] | 601 | struct npioctl *npi; |
---|
| 602 | time_t t; |
---|
| 603 | #ifdef PPP_FILTER |
---|
[78d6a50] | 604 | int error; |
---|
[85a0f07] | 605 | struct bpf_program *bp, *nbp; |
---|
| 606 | struct bpf_insn *newcode, *oldcode; |
---|
| 607 | int newcodelen; |
---|
| 608 | #endif /* PPP_FILTER */ |
---|
| 609 | #ifdef PPP_COMPRESS |
---|
[78d6a50] | 610 | int nb; |
---|
| 611 | struct ppp_option_data *odp; |
---|
| 612 | struct compressor **cp; |
---|
[85a0f07] | 613 | u_char ccp_option[CCP_MAX_OPTION_LENGTH]; |
---|
| 614 | #endif |
---|
| 615 | |
---|
| 616 | switch (cmd) { |
---|
| 617 | case FIONREAD: |
---|
| 618 | *(int *)data = sc->sc_inq.ifq_len; |
---|
| 619 | break; |
---|
| 620 | |
---|
[0286b9f] | 621 | case PPPIOCSTASK: |
---|
| 622 | taskid = *(int *)data; |
---|
| 623 | sc->sc_pppdtask = taskid; |
---|
| 624 | break; |
---|
| 625 | |
---|
[85a0f07] | 626 | case PPPIOCGUNIT: |
---|
| 627 | *(int *)data = sc->sc_if.if_unit; |
---|
| 628 | break; |
---|
| 629 | |
---|
| 630 | case PPPIOCGFLAGS: |
---|
| 631 | *(u_int *)data = sc->sc_flags; |
---|
| 632 | break; |
---|
| 633 | |
---|
| 634 | case PPPIOCSFLAGS: |
---|
| 635 | flags = *(int *)data & SC_MASK; |
---|
| 636 | s = splsoftnet(); |
---|
| 637 | #ifdef PPP_COMPRESS |
---|
| 638 | if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN)) |
---|
| 639 | ppp_ccp_closed(sc); |
---|
| 640 | #endif |
---|
[cb1e8a46] | 641 | s = splimp(); |
---|
[85a0f07] | 642 | sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags; |
---|
| 643 | splx(s); |
---|
| 644 | break; |
---|
| 645 | |
---|
| 646 | case PPPIOCSMRU: |
---|
| 647 | mru = *(int *)data; |
---|
[0286b9f] | 648 | if ( mru >= MCLBYTES ) { |
---|
| 649 | /* error - currently only handle 1 culster sized MRU */ |
---|
| 650 | /* if we want to handle up to PPP_MAXMRU then we */ |
---|
| 651 | /* need to reallocate all mbufs on the freeq */ |
---|
| 652 | /* this can only be done with iterrupts disabled */ |
---|
| 653 | return ( -1 ); |
---|
| 654 | } |
---|
| 655 | else if ( mru >= PPP_MRU ) { |
---|
| 656 | /* update the size */ |
---|
| 657 | sc->sc_mru = mru; |
---|
| 658 | } |
---|
[85a0f07] | 659 | break; |
---|
| 660 | |
---|
| 661 | case PPPIOCGMRU: |
---|
| 662 | *(int *)data = sc->sc_mru; |
---|
| 663 | break; |
---|
| 664 | |
---|
| 665 | #ifdef VJC |
---|
| 666 | case PPPIOCSMAXCID: |
---|
| 667 | if (sc->sc_comp) { |
---|
| 668 | s = splsoftnet(); |
---|
| 669 | vj_compress_init(sc->sc_comp, *(int *)data); |
---|
| 670 | splx(s); |
---|
| 671 | } |
---|
| 672 | break; |
---|
| 673 | #endif |
---|
| 674 | |
---|
| 675 | case PPPIOCXFERUNIT: |
---|
| 676 | sc->sc_xfer = 0; /* Always root p->p_pid;*/ |
---|
| 677 | break; |
---|
| 678 | |
---|
| 679 | #ifdef PPP_COMPRESS |
---|
| 680 | case PPPIOCSCOMPRESS: |
---|
| 681 | odp = (struct ppp_option_data *) data; |
---|
| 682 | nb = odp->length; |
---|
| 683 | if (nb > sizeof(ccp_option)) |
---|
| 684 | nb = sizeof(ccp_option); |
---|
| 685 | if ((error = copyin(odp->ptr, ccp_option, nb)) != 0) |
---|
| 686 | return (error); |
---|
| 687 | if (ccp_option[1] < 2) /* preliminary check on the length byte */ |
---|
| 688 | return (EINVAL); |
---|
| 689 | for (cp = ppp_compressors; *cp != NULL; ++cp) |
---|
| 690 | if ((*cp)->compress_proto == ccp_option[0]) { |
---|
| 691 | /* |
---|
| 692 | * Found a handler for the protocol - try to allocate |
---|
| 693 | * a compressor or decompressor. |
---|
| 694 | */ |
---|
| 695 | error = 0; |
---|
| 696 | if (odp->transmit) { |
---|
| 697 | s = splsoftnet(); |
---|
| 698 | if (sc->sc_xc_state != NULL) |
---|
| 699 | (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); |
---|
| 700 | sc->sc_xcomp = *cp; |
---|
| 701 | sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb); |
---|
| 702 | if (sc->sc_xc_state == NULL) { |
---|
| 703 | if (sc->sc_flags & SC_DEBUG) |
---|
| 704 | printf("ppp%d: comp_alloc failed\n", |
---|
| 705 | sc->sc_if.if_unit); |
---|
| 706 | error = ENOBUFS; |
---|
| 707 | } |
---|
| 708 | splimp(); |
---|
| 709 | sc->sc_flags &= ~SC_COMP_RUN; |
---|
| 710 | splx(s); |
---|
| 711 | } else { |
---|
| 712 | s = splsoftnet(); |
---|
| 713 | if (sc->sc_rc_state != NULL) |
---|
| 714 | (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); |
---|
| 715 | sc->sc_rcomp = *cp; |
---|
| 716 | sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb); |
---|
| 717 | if (sc->sc_rc_state == NULL) { |
---|
| 718 | if (sc->sc_flags & SC_DEBUG) |
---|
| 719 | printf("ppp%d: decomp_alloc failed\n", |
---|
| 720 | sc->sc_if.if_unit); |
---|
| 721 | error = ENOBUFS; |
---|
| 722 | } |
---|
| 723 | splimp(); |
---|
| 724 | sc->sc_flags &= ~SC_DECOMP_RUN; |
---|
| 725 | splx(s); |
---|
| 726 | } |
---|
| 727 | return (error); |
---|
| 728 | } |
---|
| 729 | if (sc->sc_flags & SC_DEBUG) |
---|
| 730 | printf("ppp%d: no compressor for [%x %x %x], %x\n", |
---|
| 731 | sc->sc_if.if_unit, ccp_option[0], ccp_option[1], |
---|
| 732 | ccp_option[2], nb); |
---|
| 733 | return (EINVAL); /* no handler found */ |
---|
| 734 | #endif /* PPP_COMPRESS */ |
---|
| 735 | |
---|
| 736 | case PPPIOCGNPMODE: |
---|
| 737 | case PPPIOCSNPMODE: |
---|
| 738 | npi = (struct npioctl *) data; |
---|
| 739 | switch (npi->protocol) { |
---|
| 740 | case PPP_IP: |
---|
| 741 | npx = NP_IP; |
---|
| 742 | break; |
---|
| 743 | default: |
---|
| 744 | return EINVAL; |
---|
| 745 | } |
---|
| 746 | if (cmd == PPPIOCGNPMODE) { |
---|
| 747 | npi->mode = sc->sc_npmode[npx]; |
---|
| 748 | } else { |
---|
| 749 | if (npi->mode != sc->sc_npmode[npx]) { |
---|
| 750 | s = splsoftnet(); |
---|
| 751 | sc->sc_npmode[npx] = npi->mode; |
---|
| 752 | if (npi->mode != NPMODE_QUEUE) { |
---|
| 753 | ppp_requeue(sc); |
---|
| 754 | (*sc->sc_start)(sc); |
---|
| 755 | } |
---|
| 756 | splx(s); |
---|
| 757 | } |
---|
| 758 | } |
---|
| 759 | break; |
---|
| 760 | |
---|
| 761 | case PPPIOCGIDLE: |
---|
| 762 | s = splsoftnet(); |
---|
[0286b9f] | 763 | microtime(&ppp_time); |
---|
[85a0f07] | 764 | t = ppp_time.tv_sec; |
---|
| 765 | ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent; |
---|
| 766 | ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv; |
---|
| 767 | splx(s); |
---|
| 768 | break; |
---|
| 769 | |
---|
| 770 | #ifdef PPP_FILTER |
---|
| 771 | case PPPIOCSPASS: |
---|
| 772 | case PPPIOCSACTIVE: |
---|
| 773 | nbp = (struct bpf_program *) data; |
---|
| 774 | if ((unsigned) nbp->bf_len > BPF_MAXINSNS) |
---|
| 775 | return EINVAL; |
---|
| 776 | newcodelen = nbp->bf_len * sizeof(struct bpf_insn); |
---|
| 777 | if (newcodelen != 0) { |
---|
[0286b9f] | 778 | MALLOC(newcode, struct bpf_insn *, newcodelen, M_DEVBUF, M_WAITOK); |
---|
[85a0f07] | 779 | if (newcode == 0) { |
---|
| 780 | return EINVAL; /* or sumpin */ |
---|
| 781 | } |
---|
| 782 | if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode, |
---|
| 783 | newcodelen)) != 0) { |
---|
[0286b9f] | 784 | FREE(newcode, M_DEVBUF); |
---|
[85a0f07] | 785 | return error; |
---|
| 786 | } |
---|
| 787 | if (!bpf_validate(newcode, nbp->bf_len)) { |
---|
[0286b9f] | 788 | FREE(newcode, M_DEVBUF); |
---|
[85a0f07] | 789 | return EINVAL; |
---|
| 790 | } |
---|
| 791 | } else |
---|
| 792 | newcode = 0; |
---|
| 793 | bp = (cmd == PPPIOCSPASS)? &sc->sc_pass_filt: &sc->sc_active_filt; |
---|
| 794 | oldcode = bp->bf_insns; |
---|
| 795 | s = splimp(); |
---|
| 796 | bp->bf_len = nbp->bf_len; |
---|
| 797 | bp->bf_insns = newcode; |
---|
| 798 | splx(s); |
---|
| 799 | if (oldcode != 0) |
---|
[0286b9f] | 800 | FREE(oldcode, M_DEVBUF); |
---|
[85a0f07] | 801 | break; |
---|
| 802 | #endif |
---|
| 803 | |
---|
| 804 | default: |
---|
| 805 | return (-1); |
---|
| 806 | } |
---|
| 807 | return (0); |
---|
| 808 | } |
---|
| 809 | |
---|
| 810 | /* |
---|
| 811 | * Process an ioctl request to the ppp network interface. |
---|
| 812 | */ |
---|
| 813 | static int |
---|
| 814 | pppsioctl(ifp, cmd, data) |
---|
| 815 | register struct ifnet *ifp; |
---|
| 816 | int cmd; |
---|
| 817 | caddr_t data; |
---|
| 818 | { |
---|
[0286b9f] | 819 | /*struct proc *p = curproc;*/ /* XXX */ |
---|
[85a0f07] | 820 | register struct ppp_softc *sc = &ppp_softc[ifp->if_unit]; |
---|
| 821 | register struct ifaddr *ifa = (struct ifaddr *)data; |
---|
| 822 | register struct ifreq *ifr = (struct ifreq *)data; |
---|
| 823 | struct ppp_stats *psp; |
---|
| 824 | #ifdef PPP_COMPRESS |
---|
| 825 | struct ppp_comp_stats *pcp; |
---|
| 826 | #endif |
---|
| 827 | int s = splimp(), error = 0; |
---|
| 828 | |
---|
| 829 | switch (cmd) { |
---|
| 830 | case SIOCSIFFLAGS: |
---|
| 831 | if ((ifp->if_flags & IFF_RUNNING) == 0) |
---|
| 832 | ifp->if_flags &= ~IFF_UP; |
---|
| 833 | break; |
---|
| 834 | |
---|
| 835 | case SIOCSIFADDR: |
---|
| 836 | if (ifa->ifa_addr->sa_family != AF_INET) |
---|
| 837 | error = EAFNOSUPPORT; |
---|
| 838 | break; |
---|
| 839 | |
---|
| 840 | case SIOCSIFDSTADDR: |
---|
| 841 | if (ifa->ifa_addr->sa_family != AF_INET) |
---|
| 842 | error = EAFNOSUPPORT; |
---|
| 843 | break; |
---|
| 844 | |
---|
| 845 | case SIOCSIFMTU: |
---|
| 846 | sc->sc_if.if_mtu = ifr->ifr_mtu; |
---|
| 847 | break; |
---|
| 848 | |
---|
| 849 | case SIOCGIFMTU: |
---|
| 850 | ifr->ifr_mtu = sc->sc_if.if_mtu; |
---|
| 851 | break; |
---|
| 852 | |
---|
| 853 | case SIOCADDMULTI: |
---|
| 854 | case SIOCDELMULTI: |
---|
| 855 | if (ifr == 0) { |
---|
| 856 | error = EAFNOSUPPORT; |
---|
| 857 | break; |
---|
| 858 | } |
---|
| 859 | switch(ifr->ifr_addr.sa_family) { |
---|
| 860 | #ifdef INET |
---|
| 861 | case AF_INET: |
---|
| 862 | break; |
---|
| 863 | #endif |
---|
| 864 | default: |
---|
| 865 | error = EAFNOSUPPORT; |
---|
| 866 | break; |
---|
| 867 | } |
---|
| 868 | break; |
---|
[0286b9f] | 869 | |
---|
| 870 | case SIO_RTEMS_SHOW_STATS: |
---|
| 871 | printf(" MRU:%-8u", sc->sc_mru); |
---|
| 872 | printf(" Bytes received:%-8u", sc->sc_stats.ppp_ibytes); |
---|
| 873 | printf(" Packets received:%-8u", sc->sc_stats.ppp_ipackets); |
---|
| 874 | printf(" Receive errors:%-8u\n", sc->sc_stats.ppp_ierrors); |
---|
| 875 | printf(" Bytes sent:%-8u", sc->sc_stats.ppp_obytes); |
---|
| 876 | printf(" Packets sent:%-8u", sc->sc_stats.ppp_opackets); |
---|
| 877 | printf(" Transmit errors:%-8u\n", sc->sc_stats.ppp_oerrors); |
---|
[85a0f07] | 878 | break; |
---|
| 879 | |
---|
| 880 | case SIOCGPPPSTATS: |
---|
| 881 | psp = &((struct ifpppstatsreq *) data)->stats; |
---|
| 882 | bzero(psp, sizeof(*psp)); |
---|
| 883 | psp->p = sc->sc_stats; |
---|
| 884 | #if defined(VJC) && !defined(SL_NO_STATS) |
---|
| 885 | if (sc->sc_comp) { |
---|
| 886 | psp->vj.vjs_packets = sc->sc_comp->sls_packets; |
---|
| 887 | psp->vj.vjs_compressed = sc->sc_comp->sls_compressed; |
---|
| 888 | psp->vj.vjs_searches = sc->sc_comp->sls_searches; |
---|
| 889 | psp->vj.vjs_misses = sc->sc_comp->sls_misses; |
---|
| 890 | psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin; |
---|
| 891 | psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin; |
---|
| 892 | psp->vj.vjs_errorin = sc->sc_comp->sls_errorin; |
---|
| 893 | psp->vj.vjs_tossed = sc->sc_comp->sls_tossed; |
---|
| 894 | } |
---|
| 895 | #endif /* VJC */ |
---|
| 896 | break; |
---|
| 897 | |
---|
| 898 | #ifdef PPP_COMPRESS |
---|
| 899 | case SIOCGPPPCSTATS: |
---|
| 900 | pcp = &((struct ifpppcstatsreq *) data)->stats; |
---|
| 901 | bzero(pcp, sizeof(*pcp)); |
---|
| 902 | if (sc->sc_xc_state != NULL) |
---|
| 903 | (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c); |
---|
| 904 | if (sc->sc_rc_state != NULL) |
---|
| 905 | (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d); |
---|
| 906 | break; |
---|
| 907 | #endif /* PPP_COMPRESS */ |
---|
| 908 | |
---|
| 909 | default: |
---|
| 910 | error = EINVAL; |
---|
| 911 | } |
---|
| 912 | splx(s); |
---|
| 913 | return (error); |
---|
| 914 | } |
---|
| 915 | |
---|
| 916 | /* |
---|
| 917 | * Queue a packet. Start transmission if not active. |
---|
| 918 | * Packet is placed in Information field of PPP frame. |
---|
| 919 | */ |
---|
| 920 | int |
---|
| 921 | pppoutput(ifp, m0, dst, rtp) |
---|
| 922 | struct ifnet *ifp; |
---|
| 923 | struct mbuf *m0; |
---|
| 924 | struct sockaddr *dst; |
---|
| 925 | struct rtentry *rtp; |
---|
| 926 | { |
---|
| 927 | register struct ppp_softc *sc = &ppp_softc[ifp->if_unit]; |
---|
| 928 | int protocol, address, control; |
---|
| 929 | u_char *cp; |
---|
| 930 | int s, error; |
---|
| 931 | struct ip *ip; |
---|
| 932 | struct ifqueue *ifq; |
---|
| 933 | enum NPmode mode; |
---|
| 934 | int len; |
---|
| 935 | struct mbuf *m; |
---|
[0286b9f] | 936 | |
---|
[85a0f07] | 937 | if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0 |
---|
| 938 | || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) { |
---|
| 939 | error = ENETDOWN; /* sort of */ |
---|
| 940 | goto bad; |
---|
| 941 | } |
---|
| 942 | |
---|
| 943 | /* |
---|
| 944 | * Compute PPP header. |
---|
| 945 | */ |
---|
| 946 | m0->m_flags &= ~M_HIGHPRI; |
---|
| 947 | switch (dst->sa_family) { |
---|
| 948 | #ifdef INET |
---|
| 949 | case AF_INET: |
---|
| 950 | address = PPP_ALLSTATIONS; |
---|
| 951 | control = PPP_UI; |
---|
| 952 | protocol = PPP_IP; |
---|
| 953 | mode = sc->sc_npmode[NP_IP]; |
---|
| 954 | |
---|
| 955 | /* |
---|
| 956 | * If this packet has the "low delay" bit set in the IP header, |
---|
| 957 | * put it on the fastq instead. |
---|
| 958 | */ |
---|
| 959 | ip = mtod(m0, struct ip *); |
---|
| 960 | if (ip->ip_tos & IPTOS_LOWDELAY) |
---|
| 961 | m0->m_flags |= M_HIGHPRI; |
---|
| 962 | break; |
---|
| 963 | #endif |
---|
| 964 | case AF_UNSPEC: |
---|
| 965 | address = PPP_ADDRESS(dst->sa_data); |
---|
| 966 | control = PPP_CONTROL(dst->sa_data); |
---|
| 967 | protocol = PPP_PROTOCOL(dst->sa_data); |
---|
| 968 | mode = NPMODE_PASS; |
---|
| 969 | break; |
---|
| 970 | default: |
---|
| 971 | printf("ppp%d: af%d not supported\n", ifp->if_unit, dst->sa_family); |
---|
| 972 | error = EAFNOSUPPORT; |
---|
| 973 | goto bad; |
---|
| 974 | } |
---|
| 975 | |
---|
| 976 | /* |
---|
| 977 | * Drop this packet, or return an error, if necessary. |
---|
| 978 | */ |
---|
| 979 | if (mode == NPMODE_ERROR) { |
---|
| 980 | error = ENETDOWN; |
---|
| 981 | goto bad; |
---|
| 982 | } |
---|
| 983 | if (mode == NPMODE_DROP) { |
---|
| 984 | error = 0; |
---|
| 985 | goto bad; |
---|
| 986 | } |
---|
| 987 | |
---|
| 988 | /* |
---|
| 989 | * Add PPP header. If no space in first mbuf, allocate another. |
---|
| 990 | * (This assumes M_LEADINGSPACE is always 0 for a cluster mbuf.) |
---|
| 991 | */ |
---|
| 992 | if (M_LEADINGSPACE(m0) < PPP_HDRLEN) { |
---|
| 993 | m0 = m_prepend(m0, PPP_HDRLEN, M_DONTWAIT); |
---|
| 994 | if (m0 == 0) { |
---|
| 995 | error = ENOBUFS; |
---|
| 996 | goto bad; |
---|
| 997 | } |
---|
| 998 | m0->m_len = 0; |
---|
| 999 | } else |
---|
| 1000 | m0->m_data -= PPP_HDRLEN; |
---|
| 1001 | |
---|
| 1002 | cp = mtod(m0, u_char *); |
---|
| 1003 | *cp++ = address; |
---|
| 1004 | *cp++ = control; |
---|
| 1005 | *cp++ = protocol >> 8; |
---|
| 1006 | *cp++ = protocol & 0xff; |
---|
| 1007 | m0->m_len += PPP_HDRLEN; |
---|
| 1008 | |
---|
| 1009 | len = 0; |
---|
| 1010 | for (m = m0; m != 0; m = m->m_next) |
---|
| 1011 | len += m->m_len; |
---|
| 1012 | |
---|
| 1013 | if (sc->sc_flags & SC_LOG_OUTPKT) { |
---|
| 1014 | printf("ppp%d output: ", ifp->if_unit); |
---|
| 1015 | pppdumpm(m0); |
---|
| 1016 | } |
---|
| 1017 | |
---|
| 1018 | if ((protocol & 0x8000) == 0) { |
---|
| 1019 | #ifdef PPP_FILTER |
---|
| 1020 | /* |
---|
| 1021 | * Apply the pass and active filters to the packet, |
---|
| 1022 | * but only if it is a data packet. |
---|
| 1023 | */ |
---|
| 1024 | *mtod(m0, u_char *) = 1; /* indicates outbound */ |
---|
| 1025 | if (sc->sc_pass_filt.bf_insns != 0 |
---|
| 1026 | && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m0, |
---|
| 1027 | len, 0) == 0) { |
---|
| 1028 | error = 0; /* drop this packet */ |
---|
| 1029 | goto bad; |
---|
| 1030 | } |
---|
| 1031 | |
---|
| 1032 | /* |
---|
| 1033 | * Update the time we sent the most recent packet. |
---|
| 1034 | */ |
---|
| 1035 | if (sc->sc_active_filt.bf_insns == 0 |
---|
| 1036 | || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0)) |
---|
[0286b9f] | 1037 | sc->sc_last_sent = time.tv_sec; |
---|
[85a0f07] | 1038 | |
---|
| 1039 | *mtod(m0, u_char *) = address; |
---|
| 1040 | #else |
---|
| 1041 | /* |
---|
| 1042 | * Update the time we sent the most recent data packet. |
---|
| 1043 | */ |
---|
[0286b9f] | 1044 | microtime(&ppp_time); |
---|
[85a0f07] | 1045 | sc->sc_last_sent = ppp_time.tv_sec; |
---|
| 1046 | #endif /* PPP_FILTER */ |
---|
| 1047 | } |
---|
| 1048 | |
---|
| 1049 | #if NBPFILTER > 0 |
---|
| 1050 | /* |
---|
| 1051 | * See if bpf wants to look at the packet. |
---|
| 1052 | */ |
---|
| 1053 | if (sc->sc_bpf) |
---|
| 1054 | bpf_mtap(sc->sc_bpf, m0); |
---|
| 1055 | #endif |
---|
| 1056 | |
---|
| 1057 | /* |
---|
| 1058 | * Put the packet on the appropriate queue. |
---|
| 1059 | */ |
---|
[0286b9f] | 1060 | s = splsoftnet(); |
---|
[85a0f07] | 1061 | if (mode == NPMODE_QUEUE) { |
---|
| 1062 | /* XXX we should limit the number of packets on this queue */ |
---|
| 1063 | *sc->sc_npqtail = m0; |
---|
| 1064 | m0->m_nextpkt = NULL; |
---|
| 1065 | sc->sc_npqtail = &m0->m_nextpkt; |
---|
| 1066 | } else { |
---|
| 1067 | ifq = (m0->m_flags & M_HIGHPRI)? &sc->sc_fastq: &ifp->if_snd; |
---|
| 1068 | if (IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) { |
---|
| 1069 | IF_DROP(ifq); |
---|
| 1070 | splx(s); |
---|
| 1071 | sc->sc_if.if_oerrors++; |
---|
| 1072 | sc->sc_stats.ppp_oerrors++; |
---|
| 1073 | error = ENOBUFS; |
---|
| 1074 | goto bad; |
---|
| 1075 | } |
---|
| 1076 | IF_ENQUEUE(ifq, m0); |
---|
| 1077 | (*sc->sc_start)(sc); |
---|
| 1078 | } |
---|
| 1079 | ifp->if_lastchange = ppp_time; |
---|
| 1080 | ifp->if_opackets++; |
---|
| 1081 | ifp->if_obytes += len; |
---|
| 1082 | |
---|
[0286b9f] | 1083 | splx(s); |
---|
[85a0f07] | 1084 | return (0); |
---|
| 1085 | |
---|
| 1086 | bad: |
---|
| 1087 | m_freem(m0); |
---|
| 1088 | return (error); |
---|
| 1089 | } |
---|
| 1090 | |
---|
| 1091 | /* |
---|
| 1092 | * After a change in the NPmode for some NP, move packets from the |
---|
| 1093 | * npqueue to the send queue or the fast queue as appropriate. |
---|
| 1094 | * Should be called at splsoftnet. |
---|
| 1095 | */ |
---|
| 1096 | static void |
---|
| 1097 | ppp_requeue(sc) |
---|
| 1098 | struct ppp_softc *sc; |
---|
| 1099 | { |
---|
| 1100 | struct mbuf *m, **mpp; |
---|
| 1101 | struct ifqueue *ifq; |
---|
| 1102 | enum NPmode mode; |
---|
| 1103 | |
---|
| 1104 | for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) { |
---|
| 1105 | switch (PPP_PROTOCOL(mtod(m, u_char *))) { |
---|
| 1106 | case PPP_IP: |
---|
| 1107 | mode = sc->sc_npmode[NP_IP]; |
---|
| 1108 | break; |
---|
| 1109 | default: |
---|
| 1110 | mode = NPMODE_PASS; |
---|
| 1111 | } |
---|
| 1112 | |
---|
| 1113 | switch (mode) { |
---|
| 1114 | case NPMODE_PASS: |
---|
| 1115 | /* |
---|
| 1116 | * This packet can now go on one of the queues to be sent. |
---|
| 1117 | */ |
---|
| 1118 | *mpp = m->m_nextpkt; |
---|
| 1119 | m->m_nextpkt = NULL; |
---|
| 1120 | ifq = (m->m_flags & M_HIGHPRI)? &sc->sc_fastq: &sc->sc_if.if_snd; |
---|
| 1121 | if (IF_QFULL(ifq)) { |
---|
| 1122 | IF_DROP(ifq); |
---|
| 1123 | sc->sc_if.if_oerrors++; |
---|
| 1124 | sc->sc_stats.ppp_oerrors++; |
---|
| 1125 | } else |
---|
| 1126 | IF_ENQUEUE(ifq, m); |
---|
| 1127 | break; |
---|
| 1128 | |
---|
| 1129 | case NPMODE_DROP: |
---|
| 1130 | case NPMODE_ERROR: |
---|
| 1131 | *mpp = m->m_nextpkt; |
---|
| 1132 | m_freem(m); |
---|
| 1133 | break; |
---|
| 1134 | |
---|
| 1135 | case NPMODE_QUEUE: |
---|
| 1136 | mpp = &m->m_nextpkt; |
---|
| 1137 | break; |
---|
| 1138 | } |
---|
| 1139 | } |
---|
| 1140 | sc->sc_npqtail = mpp; |
---|
| 1141 | } |
---|
| 1142 | |
---|
| 1143 | /* |
---|
| 1144 | * Get a packet to send. This procedure is intended to be called at |
---|
| 1145 | * splsoftnet, since it may involve time-consuming operations such as |
---|
| 1146 | * applying VJ compression, packet compression, address/control and/or |
---|
| 1147 | * protocol field compression to the packet. |
---|
| 1148 | */ |
---|
| 1149 | struct mbuf * |
---|
| 1150 | ppp_dequeue(sc) |
---|
| 1151 | struct ppp_softc *sc; |
---|
| 1152 | { |
---|
[cb1e8a46] | 1153 | struct mbuf *m; |
---|
| 1154 | #ifdef VJC |
---|
| 1155 | struct mbuf *mp; |
---|
| 1156 | #endif |
---|
[85a0f07] | 1157 | u_char *cp; |
---|
| 1158 | int address, control, protocol; |
---|
| 1159 | |
---|
| 1160 | /* |
---|
| 1161 | * Grab a packet to send: first try the fast queue, then the |
---|
| 1162 | * normal queue. |
---|
| 1163 | */ |
---|
[0286b9f] | 1164 | rtems_bsdnet_semaphore_obtain(); |
---|
[85a0f07] | 1165 | IF_DEQUEUE(&sc->sc_fastq, m); |
---|
| 1166 | if (m == NULL) |
---|
| 1167 | IF_DEQUEUE(&sc->sc_if.if_snd, m); |
---|
[0286b9f] | 1168 | rtems_bsdnet_semaphore_release(); |
---|
| 1169 | |
---|
[85a0f07] | 1170 | if (m == NULL) |
---|
| 1171 | return NULL; |
---|
| 1172 | |
---|
| 1173 | ++sc->sc_stats.ppp_opackets; |
---|
| 1174 | |
---|
| 1175 | /* |
---|
| 1176 | * Extract the ppp header of the new packet. |
---|
| 1177 | * The ppp header will be in one mbuf. |
---|
| 1178 | */ |
---|
| 1179 | cp = mtod(m, u_char *); |
---|
| 1180 | address = PPP_ADDRESS(cp); |
---|
| 1181 | control = PPP_CONTROL(cp); |
---|
| 1182 | protocol = PPP_PROTOCOL(cp); |
---|
| 1183 | |
---|
| 1184 | switch (protocol) { |
---|
| 1185 | case PPP_IP: |
---|
| 1186 | #ifdef VJC |
---|
| 1187 | /* |
---|
| 1188 | * If the packet is a TCP/IP packet, see if we can compress it. |
---|
| 1189 | */ |
---|
| 1190 | if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) { |
---|
| 1191 | struct ip *ip; |
---|
| 1192 | int type; |
---|
| 1193 | |
---|
| 1194 | mp = m; |
---|
| 1195 | ip = (struct ip *) (cp + PPP_HDRLEN); |
---|
| 1196 | if (mp->m_len <= PPP_HDRLEN) { |
---|
| 1197 | mp = mp->m_next; |
---|
| 1198 | if (mp == NULL) |
---|
| 1199 | break; |
---|
| 1200 | ip = mtod(mp, struct ip *); |
---|
| 1201 | } |
---|
| 1202 | /* this code assumes the IP/TCP header is in one non-shared mbuf */ |
---|
| 1203 | if (ip->ip_p == IPPROTO_TCP) { |
---|
| 1204 | type = vj_compress_tcp(mp, ip, sc->sc_comp, |
---|
| 1205 | !(sc->sc_flags & SC_NO_TCP_CCID)); |
---|
| 1206 | switch (type) { |
---|
| 1207 | case TYPE_UNCOMPRESSED_TCP: |
---|
| 1208 | protocol = PPP_VJC_UNCOMP; |
---|
| 1209 | break; |
---|
| 1210 | case TYPE_COMPRESSED_TCP: |
---|
| 1211 | protocol = PPP_VJC_COMP; |
---|
| 1212 | cp = mtod(m, u_char *); |
---|
| 1213 | cp[0] = address; /* header has moved */ |
---|
| 1214 | cp[1] = control; |
---|
| 1215 | cp[2] = 0; |
---|
| 1216 | break; |
---|
| 1217 | } |
---|
| 1218 | cp[3] = protocol; /* update protocol in PPP header */ |
---|
| 1219 | } |
---|
| 1220 | } |
---|
| 1221 | #endif /* VJC */ |
---|
| 1222 | break; |
---|
| 1223 | |
---|
| 1224 | #ifdef PPP_COMPRESS |
---|
| 1225 | case PPP_CCP: |
---|
| 1226 | ppp_ccp(sc, m, 0); |
---|
| 1227 | break; |
---|
| 1228 | #endif /* PPP_COMPRESS */ |
---|
| 1229 | } |
---|
| 1230 | |
---|
| 1231 | #ifdef PPP_COMPRESS |
---|
| 1232 | if (protocol != PPP_LCP && protocol != PPP_CCP |
---|
| 1233 | && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) { |
---|
| 1234 | struct mbuf *mcomp = NULL; |
---|
| 1235 | int slen, clen; |
---|
| 1236 | |
---|
| 1237 | slen = 0; |
---|
| 1238 | for (mp = m; mp != NULL; mp = mp->m_next) |
---|
| 1239 | slen += mp->m_len; |
---|
| 1240 | clen = (*sc->sc_xcomp->compress) |
---|
| 1241 | (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN); |
---|
| 1242 | if (mcomp != NULL) { |
---|
| 1243 | if (sc->sc_flags & SC_CCP_UP) { |
---|
| 1244 | /* Send the compressed packet instead of the original. */ |
---|
| 1245 | m_freem(m); |
---|
| 1246 | m = mcomp; |
---|
| 1247 | cp = mtod(m, u_char *); |
---|
| 1248 | protocol = cp[3]; |
---|
| 1249 | } else { |
---|
| 1250 | /* Can't transmit compressed packets until CCP is up. */ |
---|
| 1251 | m_freem(mcomp); |
---|
| 1252 | } |
---|
| 1253 | } |
---|
| 1254 | } |
---|
| 1255 | #endif /* PPP_COMPRESS */ |
---|
| 1256 | |
---|
| 1257 | /* |
---|
| 1258 | * Compress the address/control and protocol, if possible. |
---|
| 1259 | */ |
---|
| 1260 | if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS && |
---|
| 1261 | control == PPP_UI && protocol != PPP_ALLSTATIONS && |
---|
| 1262 | protocol != PPP_LCP) { |
---|
| 1263 | /* can compress address/control */ |
---|
| 1264 | m->m_data += 2; |
---|
| 1265 | m->m_len -= 2; |
---|
| 1266 | } |
---|
| 1267 | if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) { |
---|
| 1268 | /* can compress protocol */ |
---|
| 1269 | if (mtod(m, u_char *) == cp) { |
---|
| 1270 | cp[2] = cp[1]; /* move address/control up */ |
---|
| 1271 | cp[1] = cp[0]; |
---|
| 1272 | } |
---|
| 1273 | ++m->m_data; |
---|
| 1274 | --m->m_len; |
---|
| 1275 | } |
---|
| 1276 | |
---|
| 1277 | return m; |
---|
| 1278 | } |
---|
| 1279 | |
---|
| 1280 | /* |
---|
| 1281 | * Software interrupt routine, called at splsoftnet. |
---|
| 1282 | */ |
---|
| 1283 | void |
---|
[0286b9f] | 1284 | pppintr(void) |
---|
[85a0f07] | 1285 | { |
---|
| 1286 | } |
---|
| 1287 | |
---|
| 1288 | #ifdef PPP_COMPRESS |
---|
| 1289 | /* |
---|
| 1290 | * Handle a CCP packet. `rcvd' is 1 if the packet was received, |
---|
| 1291 | * 0 if it is about to be transmitted. |
---|
| 1292 | */ |
---|
| 1293 | static void |
---|
| 1294 | ppp_ccp(sc, m, rcvd) |
---|
| 1295 | struct ppp_softc *sc; |
---|
| 1296 | struct mbuf *m; |
---|
| 1297 | int rcvd; |
---|
| 1298 | { |
---|
| 1299 | u_char *dp, *ep; |
---|
| 1300 | struct mbuf *mp; |
---|
| 1301 | int slen, s; |
---|
| 1302 | |
---|
| 1303 | /* |
---|
| 1304 | * Get a pointer to the data after the PPP header. |
---|
| 1305 | */ |
---|
| 1306 | if (m->m_len <= PPP_HDRLEN) { |
---|
| 1307 | mp = m->m_next; |
---|
| 1308 | if (mp == NULL) |
---|
| 1309 | return; |
---|
| 1310 | dp = (mp != NULL)? mtod(mp, u_char *): NULL; |
---|
| 1311 | } else { |
---|
| 1312 | mp = m; |
---|
| 1313 | dp = mtod(mp, u_char *) + PPP_HDRLEN; |
---|
| 1314 | } |
---|
| 1315 | |
---|
| 1316 | ep = mtod(mp, u_char *) + mp->m_len; |
---|
| 1317 | if (dp + CCP_HDRLEN > ep) |
---|
| 1318 | return; |
---|
| 1319 | slen = CCP_LENGTH(dp); |
---|
| 1320 | if (dp + slen > ep) { |
---|
| 1321 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1322 | printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n", |
---|
| 1323 | dp, slen, mtod(mp, u_char *), mp->m_len); |
---|
| 1324 | return; |
---|
| 1325 | } |
---|
| 1326 | |
---|
| 1327 | switch (CCP_CODE(dp)) { |
---|
| 1328 | case CCP_CONFREQ: |
---|
| 1329 | case CCP_TERMREQ: |
---|
| 1330 | case CCP_TERMACK: |
---|
| 1331 | /* CCP must be going down - disable compression */ |
---|
| 1332 | if (sc->sc_flags & SC_CCP_UP) { |
---|
| 1333 | s = splimp(); |
---|
| 1334 | sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN); |
---|
| 1335 | splx(s); |
---|
| 1336 | } |
---|
| 1337 | break; |
---|
| 1338 | |
---|
| 1339 | case CCP_CONFACK: |
---|
| 1340 | if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP) |
---|
| 1341 | && slen >= CCP_HDRLEN + CCP_OPT_MINLEN |
---|
| 1342 | && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) { |
---|
| 1343 | if (!rcvd) { |
---|
| 1344 | /* we're agreeing to send compressed packets. */ |
---|
| 1345 | if (sc->sc_xc_state != NULL |
---|
| 1346 | && (*sc->sc_xcomp->comp_init) |
---|
| 1347 | (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, |
---|
| 1348 | sc->sc_if.if_unit, 0, sc->sc_flags & SC_DEBUG)) { |
---|
| 1349 | s = splimp(); |
---|
| 1350 | sc->sc_flags |= SC_COMP_RUN; |
---|
| 1351 | splx(s); |
---|
| 1352 | } |
---|
| 1353 | } else { |
---|
| 1354 | /* peer is agreeing to send compressed packets. */ |
---|
| 1355 | if (sc->sc_rc_state != NULL |
---|
| 1356 | && (*sc->sc_rcomp->decomp_init) |
---|
| 1357 | (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, |
---|
| 1358 | sc->sc_if.if_unit, 0, sc->sc_mru, |
---|
| 1359 | sc->sc_flags & SC_DEBUG)) { |
---|
| 1360 | s = splimp(); |
---|
| 1361 | sc->sc_flags |= SC_DECOMP_RUN; |
---|
| 1362 | sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR); |
---|
| 1363 | splx(s); |
---|
| 1364 | } |
---|
| 1365 | } |
---|
| 1366 | } |
---|
| 1367 | break; |
---|
| 1368 | |
---|
| 1369 | case CCP_RESETACK: |
---|
| 1370 | if (sc->sc_flags & SC_CCP_UP) { |
---|
| 1371 | if (!rcvd) { |
---|
| 1372 | if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) |
---|
| 1373 | (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state); |
---|
| 1374 | } else { |
---|
| 1375 | if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { |
---|
| 1376 | (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state); |
---|
| 1377 | s = splimp(); |
---|
| 1378 | sc->sc_flags &= ~SC_DC_ERROR; |
---|
| 1379 | splx(s); |
---|
| 1380 | } |
---|
| 1381 | } |
---|
| 1382 | } |
---|
| 1383 | break; |
---|
| 1384 | } |
---|
| 1385 | } |
---|
| 1386 | |
---|
| 1387 | /* |
---|
| 1388 | * CCP is down; free (de)compressor state if necessary. |
---|
| 1389 | */ |
---|
| 1390 | static void |
---|
| 1391 | ppp_ccp_closed(sc) |
---|
| 1392 | struct ppp_softc *sc; |
---|
| 1393 | { |
---|
| 1394 | if (sc->sc_xc_state) { |
---|
| 1395 | (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); |
---|
| 1396 | sc->sc_xc_state = NULL; |
---|
| 1397 | } |
---|
| 1398 | if (sc->sc_rc_state) { |
---|
| 1399 | (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); |
---|
| 1400 | sc->sc_rc_state = NULL; |
---|
| 1401 | } |
---|
| 1402 | } |
---|
| 1403 | #endif /* PPP_COMPRESS */ |
---|
| 1404 | |
---|
| 1405 | /* |
---|
| 1406 | * Process a received PPP packet, doing decompression as necessary. |
---|
| 1407 | * Should be called at splsoftnet. |
---|
| 1408 | */ |
---|
| 1409 | #define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \ |
---|
| 1410 | TYPE_UNCOMPRESSED_TCP) |
---|
| 1411 | |
---|
[0286b9f] | 1412 | static struct mbuf * |
---|
[85a0f07] | 1413 | ppp_inproc(sc, m) |
---|
| 1414 | struct ppp_softc *sc; |
---|
| 1415 | struct mbuf *m; |
---|
| 1416 | { |
---|
[0286b9f] | 1417 | struct mbuf *mf = (struct mbuf *)0; |
---|
[85a0f07] | 1418 | struct ifnet *ifp = &sc->sc_if; |
---|
| 1419 | struct ifqueue *inq; |
---|
[cb1e8a46] | 1420 | int s, ilen, proto, rv; |
---|
[85a0f07] | 1421 | u_char *cp, adrs, ctrl; |
---|
[78d6a50] | 1422 | struct mbuf *mp; |
---|
| 1423 | #ifdef PPP_COMPRESS |
---|
[0286b9f] | 1424 | struct mbuf *dmp = NULL; |
---|
[78d6a50] | 1425 | #endif |
---|
[cb1e8a46] | 1426 | #ifdef VJC |
---|
[85a0f07] | 1427 | u_char *iphdr; |
---|
[cb1e8a46] | 1428 | u_int hlen; |
---|
| 1429 | int xlen; |
---|
| 1430 | #endif |
---|
[85a0f07] | 1431 | |
---|
| 1432 | sc->sc_stats.ppp_ipackets++; |
---|
| 1433 | |
---|
| 1434 | if (sc->sc_flags & SC_LOG_INPKT) { |
---|
| 1435 | ilen = 0; |
---|
| 1436 | for (mp = m; mp != NULL; mp = mp->m_next) |
---|
| 1437 | ilen += mp->m_len; |
---|
| 1438 | printf("ppp%d: got %d bytes\n", ifp->if_unit, ilen); |
---|
| 1439 | pppdumpm(m); |
---|
| 1440 | } |
---|
| 1441 | |
---|
| 1442 | cp = mtod(m, u_char *); |
---|
| 1443 | adrs = PPP_ADDRESS(cp); |
---|
| 1444 | ctrl = PPP_CONTROL(cp); |
---|
| 1445 | proto = PPP_PROTOCOL(cp); |
---|
| 1446 | |
---|
| 1447 | if (m->m_flags & M_ERRMARK) { |
---|
| 1448 | m->m_flags &= ~M_ERRMARK; |
---|
| 1449 | s = splimp(); |
---|
| 1450 | sc->sc_flags |= SC_VJ_RESET; |
---|
| 1451 | splx(s); |
---|
| 1452 | } |
---|
| 1453 | |
---|
| 1454 | #ifdef PPP_COMPRESS |
---|
| 1455 | /* |
---|
| 1456 | * Decompress this packet if necessary, update the receiver's |
---|
| 1457 | * dictionary, or take appropriate action on a CCP packet. |
---|
| 1458 | */ |
---|
| 1459 | if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN) |
---|
| 1460 | && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) { |
---|
| 1461 | /* decompress this packet */ |
---|
| 1462 | rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp); |
---|
| 1463 | if (rv == DECOMP_OK) { |
---|
| 1464 | m_freem(m); |
---|
| 1465 | if (dmp == NULL) { |
---|
| 1466 | /* no error, but no decompressed packet produced */ |
---|
[0286b9f] | 1467 | return mf; |
---|
[85a0f07] | 1468 | } |
---|
| 1469 | m = dmp; |
---|
| 1470 | cp = mtod(m, u_char *); |
---|
| 1471 | proto = PPP_PROTOCOL(cp); |
---|
| 1472 | |
---|
| 1473 | } else { |
---|
| 1474 | /* |
---|
| 1475 | * An error has occurred in decompression. |
---|
| 1476 | * Pass the compressed packet up to pppd, which may take |
---|
| 1477 | * CCP down or issue a Reset-Req. |
---|
| 1478 | */ |
---|
| 1479 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1480 | printf("ppp%d: decompress failed %d\n", ifp->if_unit, rv); |
---|
| 1481 | s = splimp(); |
---|
| 1482 | sc->sc_flags |= SC_VJ_RESET; |
---|
| 1483 | if (rv == DECOMP_ERROR) |
---|
| 1484 | sc->sc_flags |= SC_DC_ERROR; |
---|
| 1485 | else |
---|
| 1486 | sc->sc_flags |= SC_DC_FERROR; |
---|
| 1487 | splx(s); |
---|
| 1488 | } |
---|
| 1489 | |
---|
| 1490 | } else { |
---|
| 1491 | if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { |
---|
| 1492 | (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m); |
---|
| 1493 | } |
---|
| 1494 | if (proto == PPP_CCP) { |
---|
| 1495 | ppp_ccp(sc, m, 1); |
---|
| 1496 | } |
---|
| 1497 | } |
---|
| 1498 | #endif |
---|
| 1499 | |
---|
| 1500 | ilen = 0; |
---|
| 1501 | for (mp = m; mp != NULL; mp = mp->m_next) |
---|
| 1502 | ilen += mp->m_len; |
---|
| 1503 | |
---|
| 1504 | #ifdef VJC |
---|
| 1505 | if (sc->sc_flags & SC_VJ_RESET) { |
---|
| 1506 | /* |
---|
| 1507 | * If we've missed a packet, we must toss subsequent compressed |
---|
| 1508 | * packets which don't have an explicit connection ID. |
---|
| 1509 | */ |
---|
| 1510 | if (sc->sc_comp) |
---|
| 1511 | vj_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp); |
---|
| 1512 | s = splimp(); |
---|
| 1513 | sc->sc_flags &= ~SC_VJ_RESET; |
---|
| 1514 | splx(s); |
---|
| 1515 | } |
---|
| 1516 | |
---|
| 1517 | /* |
---|
| 1518 | * See if we have a VJ-compressed packet to uncompress. |
---|
| 1519 | */ |
---|
| 1520 | if (proto == PPP_VJC_COMP) { |
---|
| 1521 | if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) |
---|
| 1522 | goto bad; |
---|
| 1523 | |
---|
| 1524 | xlen = vj_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, |
---|
| 1525 | ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP, |
---|
| 1526 | sc->sc_comp, &iphdr, &hlen); |
---|
| 1527 | |
---|
| 1528 | if (xlen <= 0) { |
---|
| 1529 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1530 | printf("ppp%d: VJ uncompress failed on type comp\n", |
---|
| 1531 | ifp->if_unit); |
---|
| 1532 | goto bad; |
---|
| 1533 | } |
---|
| 1534 | |
---|
| 1535 | /* Copy the PPP and IP headers into a new mbuf. */ |
---|
| 1536 | MGETHDR(mp, M_DONTWAIT, MT_DATA); |
---|
| 1537 | if (mp == NULL) |
---|
| 1538 | goto bad; |
---|
| 1539 | mp->m_len = 0; |
---|
| 1540 | mp->m_next = NULL; |
---|
| 1541 | if (hlen + PPP_HDRLEN > MHLEN) { |
---|
| 1542 | MCLGET(mp, M_DONTWAIT); |
---|
| 1543 | if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) { |
---|
| 1544 | m_freem(mp); |
---|
| 1545 | goto bad; /* lose if big headers and no clusters */ |
---|
| 1546 | } |
---|
| 1547 | } |
---|
| 1548 | cp = mtod(mp, u_char *); |
---|
| 1549 | cp[0] = adrs; |
---|
| 1550 | cp[1] = ctrl; |
---|
| 1551 | cp[2] = 0; |
---|
| 1552 | cp[3] = PPP_IP; |
---|
| 1553 | proto = PPP_IP; |
---|
| 1554 | bcopy(iphdr, cp + PPP_HDRLEN, hlen); |
---|
| 1555 | mp->m_len = hlen + PPP_HDRLEN; |
---|
| 1556 | |
---|
| 1557 | /* |
---|
| 1558 | * Trim the PPP and VJ headers off the old mbuf |
---|
| 1559 | * and stick the new and old mbufs together. |
---|
| 1560 | */ |
---|
| 1561 | m->m_data += PPP_HDRLEN + xlen; |
---|
| 1562 | m->m_len -= PPP_HDRLEN + xlen; |
---|
| 1563 | if (m->m_len <= M_TRAILINGSPACE(mp)) { |
---|
| 1564 | bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len); |
---|
| 1565 | mp->m_len += m->m_len; |
---|
| 1566 | MFREE(m, mp->m_next); |
---|
| 1567 | } else |
---|
| 1568 | mp->m_next = m; |
---|
| 1569 | m = mp; |
---|
| 1570 | ilen += hlen - xlen; |
---|
| 1571 | |
---|
| 1572 | } else if (proto == PPP_VJC_UNCOMP) { |
---|
| 1573 | if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) |
---|
| 1574 | goto bad; |
---|
| 1575 | |
---|
| 1576 | xlen = vj_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, |
---|
| 1577 | ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP, |
---|
| 1578 | sc->sc_comp, &iphdr, &hlen); |
---|
| 1579 | |
---|
| 1580 | if (xlen < 0) { |
---|
| 1581 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1582 | printf("ppp%d: VJ uncompress failed on type uncomp\n", |
---|
| 1583 | ifp->if_unit); |
---|
| 1584 | goto bad; |
---|
| 1585 | } |
---|
| 1586 | |
---|
| 1587 | proto = PPP_IP; |
---|
| 1588 | cp[3] = PPP_IP; |
---|
| 1589 | } |
---|
| 1590 | #endif /* VJC */ |
---|
| 1591 | |
---|
| 1592 | /* |
---|
| 1593 | * If the packet will fit in a header mbuf, don't waste a |
---|
| 1594 | * whole cluster on it. |
---|
| 1595 | */ |
---|
| 1596 | if (ilen <= MHLEN && M_IS_CLUSTER(m)) { |
---|
| 1597 | MGETHDR(mp, M_DONTWAIT, MT_DATA); |
---|
| 1598 | if (mp != NULL) { |
---|
| 1599 | m_copydata(m, 0, ilen, mtod(mp, caddr_t)); |
---|
[0286b9f] | 1600 | /* instead of freeing - return cluster mbuf so it can be reused */ |
---|
| 1601 | /* m_freem(m); */ |
---|
| 1602 | mf = m; |
---|
[85a0f07] | 1603 | m = mp; |
---|
| 1604 | m->m_len = ilen; |
---|
| 1605 | } |
---|
| 1606 | } |
---|
| 1607 | m->m_pkthdr.len = ilen; |
---|
| 1608 | m->m_pkthdr.rcvif = ifp; |
---|
| 1609 | |
---|
| 1610 | if ((proto & 0x8000) == 0) { |
---|
| 1611 | #ifdef PPP_FILTER |
---|
| 1612 | /* |
---|
| 1613 | * See whether we want to pass this packet, and |
---|
| 1614 | * if it counts as link activity. |
---|
| 1615 | */ |
---|
| 1616 | adrs = *mtod(m, u_char *); /* save address field */ |
---|
| 1617 | *mtod(m, u_char *) = 0; /* indicate inbound */ |
---|
| 1618 | if (sc->sc_pass_filt.bf_insns != 0 |
---|
| 1619 | && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m, |
---|
| 1620 | ilen, 0) == 0) { |
---|
| 1621 | /* drop this packet */ |
---|
| 1622 | m_freem(m); |
---|
[0286b9f] | 1623 | return mf; |
---|
[85a0f07] | 1624 | } |
---|
| 1625 | if (sc->sc_active_filt.bf_insns == 0 |
---|
| 1626 | || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m, ilen, 0)) |
---|
[0286b9f] | 1627 | sc->sc_last_recv = time.tv_sec; |
---|
[85a0f07] | 1628 | |
---|
| 1629 | *mtod(m, u_char *) = adrs; |
---|
| 1630 | #else |
---|
| 1631 | /* |
---|
| 1632 | * Record the time that we received this packet. |
---|
| 1633 | */ |
---|
| 1634 | microtime(&ppp_time); |
---|
| 1635 | sc->sc_last_recv = ppp_time.tv_sec; |
---|
| 1636 | #endif /* PPP_FILTER */ |
---|
| 1637 | } |
---|
| 1638 | |
---|
| 1639 | #if NBPFILTER > 0 |
---|
| 1640 | /* See if bpf wants to look at the packet. */ |
---|
| 1641 | if (sc->sc_bpf) |
---|
| 1642 | bpf_mtap(sc->sc_bpf, m); |
---|
| 1643 | #endif |
---|
| 1644 | |
---|
| 1645 | rv = 0; |
---|
| 1646 | switch (proto) { |
---|
| 1647 | #ifdef INET |
---|
| 1648 | case PPP_IP: |
---|
| 1649 | /* |
---|
| 1650 | * IP packet - take off the ppp header and pass it up to IP. |
---|
| 1651 | */ |
---|
| 1652 | if ((ifp->if_flags & IFF_UP) == 0 |
---|
| 1653 | || sc->sc_npmode[NP_IP] != NPMODE_PASS) { |
---|
| 1654 | /* interface is down - drop the packet. */ |
---|
| 1655 | m_freem(m); |
---|
[0286b9f] | 1656 | return mf; |
---|
[85a0f07] | 1657 | } |
---|
| 1658 | m->m_pkthdr.len -= PPP_HDRLEN; |
---|
| 1659 | m->m_data += PPP_HDRLEN; |
---|
| 1660 | m->m_len -= PPP_HDRLEN; |
---|
| 1661 | schednetisr(NETISR_IP); |
---|
| 1662 | inq = &ipintrq; |
---|
| 1663 | break; |
---|
| 1664 | #endif |
---|
| 1665 | |
---|
| 1666 | default: |
---|
| 1667 | /* |
---|
| 1668 | * Some other protocol - place on input queue for read(). |
---|
| 1669 | */ |
---|
| 1670 | inq = &sc->sc_inq; |
---|
| 1671 | rv = 1; |
---|
| 1672 | break; |
---|
| 1673 | } |
---|
| 1674 | |
---|
| 1675 | /* |
---|
| 1676 | * Put the packet on the appropriate input queue. |
---|
| 1677 | */ |
---|
| 1678 | s = splimp(); |
---|
| 1679 | if (IF_QFULL(inq)) { |
---|
| 1680 | IF_DROP(inq); |
---|
| 1681 | splx(s); |
---|
| 1682 | if (sc->sc_flags & SC_DEBUG) |
---|
| 1683 | printf("ppp%d: input queue full\n", ifp->if_unit); |
---|
| 1684 | ifp->if_iqdrops++; |
---|
| 1685 | goto bad; |
---|
| 1686 | } |
---|
| 1687 | IF_ENQUEUE(inq, m); |
---|
| 1688 | splx(s); |
---|
[0286b9f] | 1689 | |
---|
[85a0f07] | 1690 | ifp->if_ipackets++; |
---|
| 1691 | ifp->if_ibytes += ilen; |
---|
[0286b9f] | 1692 | microtime(&ppp_time); |
---|
[85a0f07] | 1693 | ifp->if_lastchange = ppp_time; |
---|
| 1694 | |
---|
[0286b9f] | 1695 | if (rv) { |
---|
| 1696 | (*sc->sc_ctlp)(sc); |
---|
| 1697 | } |
---|
[85a0f07] | 1698 | |
---|
[0286b9f] | 1699 | return mf; |
---|
[85a0f07] | 1700 | |
---|
| 1701 | bad: |
---|
| 1702 | m_freem(m); |
---|
| 1703 | sc->sc_if.if_ierrors++; |
---|
| 1704 | sc->sc_stats.ppp_ierrors++; |
---|
[0286b9f] | 1705 | return mf; |
---|
[85a0f07] | 1706 | } |
---|
| 1707 | |
---|
| 1708 | #define MAX_DUMP_BYTES 128 |
---|
| 1709 | |
---|
| 1710 | static void |
---|
| 1711 | pppdumpm(m0) |
---|
| 1712 | struct mbuf *m0; |
---|
| 1713 | { |
---|
| 1714 | char buf[3*MAX_DUMP_BYTES+4]; |
---|
| 1715 | char *bp = buf; |
---|
| 1716 | struct mbuf *m; |
---|
| 1717 | static char digits[] = "0123456789abcdef"; |
---|
| 1718 | |
---|
| 1719 | for (m = m0; m; m = m->m_next) { |
---|
| 1720 | int l = m->m_len; |
---|
| 1721 | u_char *rptr = (u_char *)m->m_data; |
---|
| 1722 | |
---|
| 1723 | while (l--) { |
---|
| 1724 | if (bp > buf + sizeof(buf) - 4) |
---|
| 1725 | goto done; |
---|
| 1726 | *bp++ = digits[*rptr >> 4]; /* convert byte to ascii hex */ |
---|
| 1727 | *bp++ = digits[*rptr++ & 0xf]; |
---|
| 1728 | } |
---|
| 1729 | |
---|
| 1730 | if (m->m_next) { |
---|
| 1731 | if (bp > buf + sizeof(buf) - 3) |
---|
| 1732 | goto done; |
---|
| 1733 | *bp++ = '|'; |
---|
| 1734 | } else |
---|
| 1735 | *bp++ = ' '; |
---|
| 1736 | } |
---|
| 1737 | done: |
---|
| 1738 | if (m) |
---|
| 1739 | *bp++ = '>'; |
---|
| 1740 | *bp = 0; |
---|
| 1741 | printf("%s\n", buf); |
---|
| 1742 | } |
---|
| 1743 | |
---|
| 1744 | #endif /* NPPP > 0 */ |
---|