[0286b9f] | 1 | /* |
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| 2 | * ppp_tty.c - Point-to-Point Protocol (PPP) driver for asynchronous |
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| 3 | * tty devices. |
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| 4 | * |
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| 5 | * Copyright (c) 1989 Carnegie Mellon University. |
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| 6 | * All rights reserved. |
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| 7 | * |
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| 8 | * Redistribution and use in source and binary forms are permitted |
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| 9 | * provided that the above copyright notice and this paragraph are |
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| 10 | * duplicated in all such forms and that any documentation, |
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| 11 | * advertising materials, and other materials related to such |
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| 12 | * distribution and use acknowledge that the software was developed |
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| 13 | * by Carnegie Mellon University. The name of the |
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| 14 | * University may not be used to endorse or promote products derived |
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| 15 | * from this software without specific prior written permission. |
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| 16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 17 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 18 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 19 | * |
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| 20 | * Drew D. Perkins |
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| 21 | * Carnegie Mellon University |
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| 22 | * 4910 Forbes Ave. |
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| 23 | * Pittsburgh, PA 15213 |
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| 24 | * (412) 268-8576 |
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| 25 | * ddp@andrew.cmu.edu |
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| 26 | * |
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| 27 | * Based on: |
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| 28 | * @(#)if_sl.c 7.6.1.2 (Berkeley) 2/15/89 |
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| 29 | * |
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| 30 | * Copyright (c) 1987 Regents of the University of California. |
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| 31 | * All rights reserved. |
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| 32 | * |
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| 33 | * Redistribution and use in source and binary forms are permitted |
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| 34 | * provided that the above copyright notice and this paragraph are |
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| 35 | * duplicated in all such forms and that any documentation, |
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| 36 | * advertising materials, and other materials related to such |
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| 37 | * distribution and use acknowledge that the software was developed |
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| 38 | * by the University of California, Berkeley. The name of the |
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| 39 | * University may not be used to endorse or promote products derived |
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| 40 | * from this software without specific prior written permission. |
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| 41 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 42 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 43 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 44 | * |
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| 45 | * Serial Line interface |
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| 46 | * |
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| 47 | * Rick Adams |
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| 48 | * Center for Seismic Studies |
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| 49 | * 1300 N 17th Street, Suite 1450 |
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| 50 | * Arlington, Virginia 22209 |
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| 51 | * (703)276-7900 |
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| 52 | * rick@seismo.ARPA |
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| 53 | * seismo!rick |
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| 54 | * |
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| 55 | * Pounded on heavily by Chris Torek (chris@mimsy.umd.edu, umcp-cs!chris). |
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| 56 | * Converted to 4.3BSD Beta by Chris Torek. |
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| 57 | * Other changes made at Berkeley, based in part on code by Kirk Smith. |
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| 58 | * |
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| 59 | * Converted to 4.3BSD+ 386BSD by Brad Parker (brad@cayman.com) |
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| 60 | * Added VJ tcp header compression; more unified ioctls |
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| 61 | * |
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| 62 | * Extensively modified by Paul Mackerras (paulus@cs.anu.edu.au). |
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| 63 | * Cleaned up a lot of the mbuf-related code to fix bugs that |
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| 64 | * caused system crashes and packet corruption. Changed pppstart |
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| 65 | * so that it doesn't just give up with a "collision" if the whole |
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| 66 | * packet doesn't fit in the output ring buffer. |
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| 67 | * |
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| 68 | * Added priority queueing for interactive IP packets, following |
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| 69 | * the model of if_sl.c, plus hooks for bpf. |
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| 70 | * Paul Mackerras (paulus@cs.anu.edu.au). |
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| 71 | */ |
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| 72 | |
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| 73 | /* $Id$ */ |
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| 74 | /* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */ |
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| 75 | /* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */ |
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| 76 | |
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| 77 | #include "ppp.h" |
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| 78 | #if NPPP > 0 |
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| 79 | |
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| 80 | #include <sys/param.h> |
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| 81 | #include <sys/systm.h> |
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| 82 | #include <sys/proc.h> |
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| 83 | #include <sys/mbuf.h> |
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| 84 | #include <sys/socket.h> |
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| 85 | #include <sys/ioctl.h> |
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| 86 | #include <sys/file.h> |
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| 87 | #include <sys/kernel.h> |
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| 88 | |
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| 89 | #include <net/if.h> |
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| 90 | #include <net/if_types.h> |
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| 91 | |
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| 92 | #ifdef VJC |
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| 93 | #include <netinet/in.h> |
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| 94 | #include <netinet/in_systm.h> |
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| 95 | #include <netinet/ip.h> |
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| 96 | #include <net/pppcompress.h> |
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| 97 | #endif |
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| 98 | |
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| 99 | #include <rtems.h> |
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| 100 | #include <rtems/libio.h> |
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| 101 | #include <sys/ttycom.h> |
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| 102 | #include <termios.h> |
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| 103 | #include <rtems/termiostypes.h> |
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| 104 | |
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| 105 | #ifdef PPP_FILTER |
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| 106 | #include <net/bpf.h> |
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| 107 | #endif |
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| 108 | #include <net/ppp_defs.h> |
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| 109 | #include <net/if_ppp.h> |
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| 110 | #include <net/if_pppvar.h> |
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| 111 | |
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| 112 | |
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| 113 | void pppasyncattach __P((void)); |
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| 114 | int pppopen __P((struct rtems_termios_tty *tty)); |
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| 115 | int pppclose __P((struct rtems_termios_tty *tty)); |
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| 116 | int pppread __P((struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args)); |
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| 117 | int pppwrite __P((struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args)); |
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| 118 | int ppptioctl __P((struct rtems_termios_tty *tty, rtems_libio_ioctl_args_t *args)); |
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| 119 | int pppinput __P((int c, struct rtems_termios_tty *tty)); |
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| 120 | int pppstart __P((struct rtems_termios_tty *tp)); |
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| 121 | u_short pppfcs __P((u_short fcs, u_char *cp, int len)); |
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| 122 | void pppallocmbuf __P((struct ppp_softc *sc, struct mbuf **mp)); |
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| 123 | |
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| 124 | static void pppasyncstart __P((struct ppp_softc *)); |
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| 125 | static void pppasyncctlp __P((struct ppp_softc *)); |
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| 126 | static void pppasyncrelinq __P((struct ppp_softc *)); |
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| 127 | /*static void ppp_timeout __P((void *)); */ |
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| 128 | /*static void pppdumpb __P((u_char *b, int l)); */ |
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| 129 | /*static void ppplogchar __P((struct ppp_softc *, int)); */ |
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| 130 | |
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| 131 | /* |
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| 132 | * Some useful mbuf macros not in mbuf.h. |
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| 133 | */ |
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| 134 | #define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) |
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| 135 | |
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| 136 | #define M_DATASTART(m) \ |
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| 137 | (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ |
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| 138 | (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) |
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| 139 | |
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| 140 | #define M_DATASIZE(m) \ |
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| 141 | (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ |
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| 142 | (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) |
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| 143 | |
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| 144 | /* |
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| 145 | * We steal two bits in the mbuf m_flags, to mark high-priority packets |
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| 146 | * for output, and received packets following lost/corrupted packets. |
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| 147 | */ |
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| 148 | #define M_HIGHPRI 0x2000 /* output packet for sc_fastq */ |
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| 149 | #define M_ERRMARK 0x4000 /* steal a bit in mbuf m_flags */ |
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| 150 | |
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| 151 | /* |
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| 152 | * Does c need to be escaped? |
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| 153 | */ |
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| 154 | #define ESCAPE_P(c) (sc->sc_asyncmap[(c) >> 5] & (1 << ((c) & 0x1F))) |
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| 155 | |
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| 156 | /* |
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| 157 | * Procedures for using an async tty interface for PPP. |
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| 158 | */ |
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| 159 | |
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| 160 | /* This is a FreeBSD-2.0 kernel. */ |
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| 161 | #define CCOUNT(rb) (((rb).Size+(rb).Head-(rb).Tail) % (rb).Size) |
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| 162 | #define FCOUNT(rb) ((rb).Size-CCOUNT(rb)-1) |
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| 163 | #define PPP_LOWAT 100 /* Process more output when < LOWAT on queue */ |
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| 164 | #define PPP_HIWAT 400 /* Don't start a new packet if HIWAT on que */ |
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| 165 | |
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| 166 | /* |
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| 167 | * Define the PPP line discipline. |
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| 168 | */ |
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| 169 | |
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| 170 | static struct linesw pppdisc = { |
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| 171 | pppopen, pppclose, pppread, pppwrite, |
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| 172 | pppinput, pppstart, ppptioctl, NULL |
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| 173 | }; |
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| 174 | |
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| 175 | void |
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| 176 | pppasyncattach() |
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| 177 | { |
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| 178 | linesw[PPPDISC] = pppdisc; |
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| 179 | } |
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| 180 | |
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| 181 | TEXT_SET(pseudo_set, pppasyncattach); |
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| 182 | |
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| 183 | /* |
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| 184 | * Line specific open routine for async tty devices. |
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| 185 | * Attach the given tty to the first available ppp unit. |
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| 186 | * Called from device open routine or ttioctl. |
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| 187 | */ |
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| 188 | /* ARGSUSED */ |
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| 189 | int |
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| 190 | pppopen(struct rtems_termios_tty *tty) |
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| 191 | { |
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| 192 | int i; |
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| 193 | register struct ppp_softc *sc; |
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| 194 | struct mbuf *m = (struct mbuf *)0; |
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[fd55b7d] | 195 | extern int termios_baud_to_number(int); |
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[0286b9f] | 196 | |
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| 197 | if (tty->t_line == PPPDISC) { |
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| 198 | sc = (struct ppp_softc *)tty->t_sc; |
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| 199 | if (sc != NULL && sc->sc_devp == (void *)tty) { |
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| 200 | return (0); |
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| 201 | } |
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| 202 | } |
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| 203 | |
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| 204 | if ((sc = pppalloc(1)) == NULL) { |
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| 205 | return ENXIO; |
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| 206 | } |
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| 207 | |
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| 208 | if (sc->sc_relinq) |
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| 209 | (*sc->sc_relinq)(sc); /* get previous owner to relinquish the unit */ |
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| 210 | |
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| 211 | sc->sc_ilen = 0; |
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| 212 | sc->sc_m = NULL; |
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| 213 | bzero(sc->sc_asyncmap, sizeof(sc->sc_asyncmap)); |
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| 214 | sc->sc_asyncmap[0] = 0xffffffff; |
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| 215 | sc->sc_asyncmap[3] = 0x60000000; |
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| 216 | sc->sc_rasyncmap = 0; |
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| 217 | sc->sc_devp = tty; |
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| 218 | sc->sc_start = pppasyncstart; |
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| 219 | sc->sc_ctlp = pppasyncctlp; |
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| 220 | sc->sc_relinq = pppasyncrelinq; |
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| 221 | sc->sc_outm = NULL; |
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| 222 | sc->sc_outmc = NULL; |
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| 223 | |
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| 224 | /* preallocate mbufs for free queue */ |
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| 225 | rtems_bsdnet_semaphore_obtain(); |
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| 226 | for (i=0; i<NUM_MBUFQ; i++) { |
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| 227 | pppallocmbuf(sc, &m); |
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| 228 | if ( i == 0 ) { |
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| 229 | /* use first mbuf for rx iterrupt handling */ |
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| 230 | sc->sc_m = m; |
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| 231 | } |
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| 232 | else { |
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| 233 | /* enqueue mbuf for later use */ |
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| 234 | IF_ENQUEUE(&sc->sc_freeq, m); |
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| 235 | } |
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| 236 | m = (struct mbuf *)0; |
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| 237 | } |
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| 238 | rtems_bsdnet_semaphore_release(); |
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| 239 | |
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| 240 | /* initialize values */ |
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| 241 | sc->sc_if.if_flags |= IFF_RUNNING; |
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[fd55b7d] | 242 | sc->sc_if.if_baudrate = |
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| 243 | termios_baud_to_number(tty->termios.c_cflag & CBAUD); |
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[0286b9f] | 244 | |
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| 245 | tty->t_sc = (void *)sc; |
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| 246 | |
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| 247 | return ( RTEMS_SUCCESSFUL ); |
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| 248 | } |
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| 249 | |
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| 250 | /* |
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| 251 | * Line specific close routine, called from device close routine |
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| 252 | * and from ttioctl. |
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| 253 | * Detach the tty from the ppp unit. |
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| 254 | * Mimics part of ttyclose(). |
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| 255 | */ |
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| 256 | int |
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| 257 | pppclose(struct rtems_termios_tty *tty) |
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| 258 | { |
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| 259 | register struct ppp_softc *sc; |
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| 260 | |
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| 261 | tty->t_line = 0; |
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| 262 | sc = (struct ppp_softc *)tty->t_sc; |
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| 263 | if (sc != NULL) { |
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| 264 | tty->t_sc = NULL; |
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| 265 | if (tty == (struct rtems_termios_tty *)sc->sc_devp) { |
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| 266 | rtems_bsdnet_semaphore_obtain(); |
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| 267 | pppasyncrelinq(sc); |
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| 268 | pppdealloc(sc); |
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| 269 | rtems_bsdnet_semaphore_release(); |
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| 270 | } |
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| 271 | } |
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| 272 | return ( RTEMS_SUCCESSFUL ); |
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| 273 | } |
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| 274 | |
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| 275 | /* |
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| 276 | * Relinquish the interface unit to another device. |
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| 277 | */ |
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| 278 | static void |
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| 279 | pppasyncrelinq(sc) |
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| 280 | struct ppp_softc *sc; |
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| 281 | { |
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| 282 | #ifdef XXX_XXX |
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| 283 | if (sc->sc_outm) { |
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| 284 | m_freem(sc->sc_outm); |
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| 285 | sc->sc_outm = NULL; |
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| 286 | } |
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| 287 | if (sc->sc_m) { |
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| 288 | m_freem(sc->sc_m); |
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| 289 | sc->sc_m = NULL; |
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| 290 | } |
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| 291 | if (sc->sc_flags & SC_TIMEOUT) { |
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| 292 | untimeout(ppp_timeout, (void *) sc); |
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| 293 | sc->sc_flags &= ~SC_TIMEOUT; |
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| 294 | } |
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| 295 | #endif |
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| 296 | } |
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| 297 | |
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| 298 | /* |
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| 299 | * Line specific (tty) read routine. |
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| 300 | */ |
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| 301 | int |
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| 302 | pppread(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args) |
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| 303 | { |
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| 304 | rtems_status_code status = RTEMS_UNSATISFIED; |
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| 305 | int count = 0; |
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| 306 | int maximum = rw_args->count; |
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| 307 | char *buffer = rw_args->buffer; |
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| 308 | register struct ppp_softc *sc = (struct ppp_softc *)tty->t_sc; |
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| 309 | struct mbuf *m; |
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| 310 | struct mbuf *m0; |
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| 311 | u_char *p; |
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| 312 | |
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| 313 | if (sc == NULL) { |
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| 314 | return 0; |
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| 315 | } |
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| 316 | |
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| 317 | /* |
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| 318 | * Loop waiting for input, checking that nothing disasterous |
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| 319 | * happens in the meantime. |
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| 320 | */ |
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| 321 | if (tty != (struct rtems_termios_tty *)sc->sc_devp || tty->t_line != PPPDISC) { |
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| 322 | return ( status ); |
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| 323 | } |
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| 324 | if (sc->sc_inq.ifq_head == NULL) { |
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| 325 | return ( status ); |
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| 326 | } |
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| 327 | |
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| 328 | /* Get the packet from the input queue */ |
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| 329 | rtems_bsdnet_semaphore_obtain(); |
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| 330 | IF_DEQUEUE(&sc->sc_inq, m0); |
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| 331 | |
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| 332 | /* loop over mbuf chain */ |
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| 333 | m = m0; |
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| 334 | while (( m != NULL ) && ( m->m_len > 0 ) && ( count+m->m_len < maximum )) { |
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| 335 | /* copy data into buffer */ |
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| 336 | p = mtod(m, u_char *); |
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| 337 | memcpy(buffer, p, m->m_len); |
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| 338 | memset(p, 0, m->m_len); |
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| 339 | count += m->m_len; |
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| 340 | buffer += m->m_len; |
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| 341 | |
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| 342 | /* increment loop index */ |
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| 343 | m = m->m_next; |
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| 344 | } |
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| 345 | |
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| 346 | /* free mbuf chain */ |
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| 347 | m_freem(m0); |
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| 348 | rtems_bsdnet_semaphore_release(); |
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| 349 | |
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| 350 | /* update return values */ |
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| 351 | rw_args->bytes_moved = count; |
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| 352 | if ( count >= 0 ) { |
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| 353 | status = RTEMS_SUCCESSFUL; |
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| 354 | } |
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| 355 | |
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| 356 | /* check to see if queue is empty */ |
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| 357 | if (sc->sc_inq.ifq_head != NULL) { |
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| 358 | /* queue is not empty - post another event to ourself */ |
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| 359 | rtems_event_send(sc->sc_pppdtask, PPPD_EVENT); |
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| 360 | } |
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| 361 | |
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| 362 | return ( status ); |
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| 363 | } |
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| 364 | |
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| 365 | /* |
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| 366 | * Line specific (tty) write routine. |
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| 367 | */ |
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| 368 | int |
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| 369 | pppwrite(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args) |
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| 370 | { |
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| 371 | struct sockaddr dst; |
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| 372 | int n; |
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| 373 | int len; |
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| 374 | int maximum = rw_args->count; |
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| 375 | char *out_buffer = rw_args->buffer; |
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| 376 | register struct ppp_softc *sc = (struct ppp_softc *)tty->t_sc; |
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| 377 | struct mbuf *m; |
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| 378 | struct mbuf *m0; |
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| 379 | struct mbuf **mp; |
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| 380 | |
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| 381 | rtems_bsdnet_semaphore_obtain(); |
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| 382 | for (mp = &m0; maximum; mp = &m->m_next) { |
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| 383 | MGET(m, M_WAIT, MT_DATA); |
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| 384 | if ((*mp = m) == NULL) { |
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| 385 | m_freem(m0); |
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| 386 | return (ENOBUFS); |
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| 387 | } |
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| 388 | m->m_len = 0; |
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| 389 | if (maximum >= MCLBYTES / 2) { |
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| 390 | MCLGET(m, M_DONTWAIT); |
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| 391 | } |
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| 392 | len = M_TRAILINGSPACE(m); |
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| 393 | if (len > maximum) { |
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| 394 | memcpy(mtod(m, u_char *),out_buffer,maximum); |
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| 395 | m->m_len = maximum; |
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| 396 | maximum = 0; |
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| 397 | } |
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| 398 | else { |
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| 399 | memcpy(mtod(m, u_char *),out_buffer,len); |
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| 400 | m->m_len = len; |
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| 401 | maximum -= len; |
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| 402 | out_buffer += len; |
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| 403 | } |
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| 404 | } |
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| 405 | |
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| 406 | dst.sa_family = AF_UNSPEC; |
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| 407 | bcopy(mtod(m0, u_char *), dst.sa_data, PPP_HDRLEN); |
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| 408 | m0->m_data += PPP_HDRLEN; |
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| 409 | m0->m_len -= PPP_HDRLEN; |
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| 410 | |
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| 411 | n = pppoutput(&sc->sc_if, m0, &dst, (struct rtentry *)0); |
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| 412 | rtems_bsdnet_semaphore_release(); |
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| 413 | |
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| 414 | return ( n ); |
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| 415 | } |
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| 416 | |
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| 417 | /* |
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| 418 | * Line specific (tty) ioctl routine. |
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| 419 | * This discipline requires that tty device drivers call |
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| 420 | * the line specific l_ioctl routine from their ioctl routines. |
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| 421 | */ |
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| 422 | /* ARGSUSED */ |
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| 423 | int |
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| 424 | ppptioctl(struct rtems_termios_tty *tty, rtems_libio_ioctl_args_t *args) |
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| 425 | { |
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[fd55b7d] | 426 | /* int i; */ |
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[0286b9f] | 427 | int error = RTEMS_SUCCESSFUL; |
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| 428 | int cmd = args->command; |
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| 429 | caddr_t data = args->buffer; |
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| 430 | struct ppp_softc *sc = tty->t_sc; |
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| 431 | |
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| 432 | switch (cmd) { |
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| 433 | case RTEMS_IO_GET_ATTRIBUTES: |
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| 434 | case RTEMS_IO_SET_ATTRIBUTES: |
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| 435 | case RTEMS_IO_TCDRAIN: |
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| 436 | case RTEMS_IO_SNDWAKEUP: |
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| 437 | case RTEMS_IO_RCVWAKEUP: |
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| 438 | case TIOCGETD: |
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| 439 | case TIOCSETD: |
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| 440 | error = rtems_termios_ioctl(args); |
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| 441 | break; |
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| 442 | |
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| 443 | case PPPIOCSASYNCMAP: |
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| 444 | sc->sc_asyncmap[0] = *(u_int *)data; |
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| 445 | break; |
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| 446 | |
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| 447 | case PPPIOCGASYNCMAP: |
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| 448 | *(u_int *)data = sc->sc_asyncmap[0]; |
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| 449 | break; |
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| 450 | |
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| 451 | case PPPIOCSRASYNCMAP: |
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| 452 | sc->sc_rasyncmap = *(u_int *)data; |
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| 453 | break; |
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| 454 | |
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| 455 | case PPPIOCGRASYNCMAP: |
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| 456 | *(u_int *)data = sc->sc_rasyncmap; |
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| 457 | break; |
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| 458 | |
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| 459 | case PPPIOCSXASYNCMAP: |
---|
| 460 | bcopy(data, sc->sc_asyncmap, sizeof(sc->sc_asyncmap)); |
---|
| 461 | sc->sc_asyncmap[1] = 0; /* mustn't escape 0x20 - 0x3f */ |
---|
| 462 | sc->sc_asyncmap[2] &= ~0x40000000; /* mustn't escape 0x5e */ |
---|
| 463 | sc->sc_asyncmap[3] |= 0x60000000; /* must escape 0x7d, 0x7e */ |
---|
| 464 | break; |
---|
| 465 | |
---|
| 466 | case PPPIOCGXASYNCMAP: |
---|
| 467 | bcopy(sc->sc_asyncmap, data, sizeof(sc->sc_asyncmap)); |
---|
| 468 | break; |
---|
| 469 | |
---|
| 470 | default: |
---|
| 471 | rtems_bsdnet_semaphore_obtain(); |
---|
| 472 | error = pppioctl(sc, cmd, data, 0, NULL); |
---|
| 473 | rtems_bsdnet_semaphore_release(); |
---|
| 474 | } |
---|
| 475 | return error; |
---|
| 476 | } |
---|
| 477 | |
---|
| 478 | /* |
---|
| 479 | * FCS lookup table as calculated by genfcstab. |
---|
| 480 | */ |
---|
| 481 | static u_short fcstab[256] = { |
---|
| 482 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, |
---|
| 483 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, |
---|
| 484 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, |
---|
| 485 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, |
---|
| 486 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, |
---|
| 487 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, |
---|
| 488 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, |
---|
| 489 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, |
---|
| 490 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, |
---|
| 491 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, |
---|
| 492 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, |
---|
| 493 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, |
---|
| 494 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, |
---|
| 495 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, |
---|
| 496 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, |
---|
| 497 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, |
---|
| 498 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, |
---|
| 499 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, |
---|
| 500 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, |
---|
| 501 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, |
---|
| 502 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, |
---|
| 503 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, |
---|
| 504 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, |
---|
| 505 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, |
---|
| 506 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, |
---|
| 507 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, |
---|
| 508 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, |
---|
| 509 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, |
---|
| 510 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, |
---|
| 511 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, |
---|
| 512 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, |
---|
| 513 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 |
---|
| 514 | }; |
---|
| 515 | |
---|
| 516 | /* |
---|
| 517 | * Calculate a new FCS given the current FCS and the new data. |
---|
| 518 | */ |
---|
| 519 | u_short |
---|
| 520 | pppfcs(u_short fcs, u_char *cp, int len) |
---|
| 521 | { |
---|
| 522 | while (len--) |
---|
| 523 | fcs = PPP_FCS(fcs, *cp++); |
---|
| 524 | return (fcs); |
---|
| 525 | } |
---|
| 526 | |
---|
| 527 | /* |
---|
| 528 | * This gets called at splsoftnet from if_ppp.c at various times |
---|
| 529 | * when there is data ready to be sent. |
---|
| 530 | */ |
---|
| 531 | void pppasyncstart(struct ppp_softc *sc) |
---|
| 532 | { |
---|
| 533 | /* check to see if output is not active */ |
---|
| 534 | if ( sc->sc_outflag == 0 ) { |
---|
| 535 | /* mark active and post tx event to daemon */ |
---|
| 536 | sc->sc_outflag |= SC_TX_PENDING; |
---|
| 537 | rtems_event_send(sc->sc_txtask, TX_PACKET); |
---|
| 538 | } |
---|
| 539 | } |
---|
| 540 | |
---|
| 541 | /* |
---|
| 542 | * This gets called when a received packet is placed on |
---|
| 543 | * the inq, at splsoftnet. |
---|
| 544 | */ |
---|
| 545 | static void |
---|
| 546 | pppasyncctlp(sc) |
---|
| 547 | struct ppp_softc *sc; |
---|
| 548 | { |
---|
| 549 | /* check to see if task id was set */ |
---|
| 550 | if ( sc->sc_pppdtask != 0 ) { |
---|
| 551 | /* post event to daemon */ |
---|
| 552 | rtems_event_send(sc->sc_pppdtask, PPPD_EVENT); |
---|
| 553 | } |
---|
| 554 | } |
---|
| 555 | |
---|
| 556 | /* |
---|
| 557 | * Start output on async tty interface. If the transmit queue |
---|
| 558 | * has drained sufficiently, arrange for pppasyncstart to be |
---|
| 559 | * called later at splsoftnet. |
---|
| 560 | * Called at spltty or higher. |
---|
| 561 | */ |
---|
| 562 | int |
---|
| 563 | pppstart(struct rtems_termios_tty *tp) |
---|
| 564 | { |
---|
| 565 | char c; |
---|
[fd55b7d] | 566 | char *sendBegin; |
---|
[0286b9f] | 567 | char cFrame = (char )PPP_FLAG; |
---|
| 568 | u_char ioffset = (u_char )0; |
---|
| 569 | struct mbuf *m = (struct mbuf *)0; |
---|
| 570 | struct ppp_softc *sc = tp->t_sc; |
---|
| 571 | |
---|
| 572 | /* ensure input is valid and we are busy */ |
---|
| 573 | if (( sc != NULL ) && ( sc->sc_outflag & SC_TX_BUSY )) { |
---|
| 574 | /* check to see if we need to get the next buffer */ |
---|
| 575 | if ( sc->sc_outoff >= sc->sc_outlen ) { |
---|
| 576 | /* loop to get next non-zero length buffer */ |
---|
| 577 | if ( sc->sc_outmc != NULL ) { |
---|
| 578 | m = sc->sc_outmc->m_next; |
---|
| 579 | } |
---|
| 580 | |
---|
| 581 | /* check for next mbuf in chain */ |
---|
| 582 | if ( m != NULL ) { |
---|
| 583 | /* update values to use this mbuf */ |
---|
| 584 | sc->sc_outmc = m; |
---|
| 585 | sc->sc_outbuf = mtod(m, u_char *); |
---|
| 586 | sc->sc_outlen = m->m_len; |
---|
| 587 | sc->sc_outoff = (short)0; |
---|
| 588 | } |
---|
| 589 | else if ( (sc->sc_outflag & SC_TX_FCS) == 0 ) { |
---|
| 590 | /* setup to use FCS buffer */ |
---|
| 591 | sc->sc_outflag |= SC_TX_FCS; |
---|
| 592 | sc->sc_outbuf = sc->sc_outfcsbuf; |
---|
| 593 | sc->sc_outlen = sc->sc_outfcslen; |
---|
| 594 | sc->sc_outoff = (short)0; |
---|
| 595 | } |
---|
| 596 | else { |
---|
| 597 | /* done with this packet */ |
---|
| 598 | sc->sc_outflag &= ~SC_TX_BUSY; |
---|
| 599 | (*tp->device.write)(tp->minor, &cFrame, 1); |
---|
| 600 | rtems_event_send(sc->sc_txtask, TX_TRANSMIT); |
---|
| 601 | } |
---|
| 602 | } |
---|
| 603 | |
---|
| 604 | /* check to see if there is some data to write out */ |
---|
| 605 | if ( sc->sc_outoff < sc->sc_outlen ) { |
---|
| 606 | /* check to see if character needs to be escaped */ |
---|
| 607 | c = sc->sc_outbuf[sc->sc_outoff]; |
---|
| 608 | if ( ESCAPE_P(c) ) { |
---|
| 609 | if ( sc->sc_outflag & SC_TX_ESCAPE ) { |
---|
| 610 | /* last sent character was the escape character */ |
---|
| 611 | c = c ^ PPP_TRANS; |
---|
| 612 | |
---|
| 613 | /* clear the escape flag and increment the offset */ |
---|
| 614 | sc->sc_outflag &= ~SC_TX_ESCAPE; |
---|
| 615 | ioffset++; |
---|
| 616 | } |
---|
| 617 | else { |
---|
| 618 | /* need to send the escape character */ |
---|
| 619 | c = PPP_ESCAPE; |
---|
| 620 | |
---|
| 621 | /* set the escape flag */ |
---|
| 622 | sc->sc_outflag |= SC_TX_ESCAPE; |
---|
| 623 | } |
---|
[fd55b7d] | 624 | sendBegin = &c; |
---|
[0286b9f] | 625 | } |
---|
| 626 | else { |
---|
[fd55b7d] | 627 | /* escape not needed - increment the offset as much as possible */ |
---|
| 628 | while ((!ESCAPE_P(c)) && ((sc->sc_outoff + ioffset) < sc->sc_outlen)) { |
---|
| 629 | ioffset++; |
---|
| 630 | c = sc->sc_outbuf[sc->sc_outoff + ioffset]; |
---|
| 631 | } |
---|
| 632 | sendBegin = &sc->sc_outbuf[sc->sc_outoff]; |
---|
[0286b9f] | 633 | } |
---|
| 634 | |
---|
[fd55b7d] | 635 | /* write out the character(s) and update the stats */ |
---|
| 636 | (*tp->device.write)(tp->minor, sendBegin, (ioffset > 0) ? ioffset : 1); |
---|
| 637 | sc->sc_stats.ppp_obytes += (ioffset > 0) ? ioffset : 1; |
---|
[0286b9f] | 638 | sc->sc_outoff += ioffset; |
---|
| 639 | } |
---|
| 640 | } |
---|
| 641 | |
---|
| 642 | return ( 0 ); |
---|
| 643 | } |
---|
| 644 | |
---|
| 645 | #ifdef XXX_XXX |
---|
| 646 | /* |
---|
| 647 | * Timeout routine - try to start some more output. |
---|
| 648 | */ |
---|
| 649 | static void |
---|
| 650 | ppp_timeout(x) |
---|
| 651 | void *x; |
---|
| 652 | { |
---|
| 653 | struct rtems_termios_tty *tty = (struct rtems_termios_tty *)x; |
---|
| 654 | struct ppp_softc *sc = tty->t_sc; |
---|
| 655 | /* struct rtems_termios_tty *tp = (struct rtems_termios_tty *)sc->sc_devp; */ |
---|
| 656 | |
---|
| 657 | sc->sc_flags &= ~SC_TIMEOUT; |
---|
| 658 | /* pppstart(tp); */ |
---|
| 659 | } |
---|
| 660 | #endif |
---|
| 661 | |
---|
| 662 | /* |
---|
| 663 | * Allocate enough mbuf to handle current MRU. |
---|
| 664 | */ |
---|
| 665 | #ifdef XXX_XXX |
---|
| 666 | static void |
---|
| 667 | pppgetm(sc) |
---|
| 668 | register struct ppp_softc *sc; |
---|
| 669 | { |
---|
| 670 | struct mbuf *m, **mp; |
---|
| 671 | int len; |
---|
| 672 | |
---|
| 673 | mp = &sc->sc_m; |
---|
| 674 | for (len = sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN; len > 0; ){ |
---|
| 675 | if ((m = *mp) == NULL) { |
---|
| 676 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
---|
| 677 | if (m == NULL) |
---|
| 678 | break; |
---|
| 679 | *mp = m; |
---|
| 680 | MCLGET(m, M_DONTWAIT); |
---|
| 681 | } |
---|
| 682 | len -= M_DATASIZE(m); |
---|
| 683 | mp = &m->m_next; |
---|
| 684 | } |
---|
| 685 | } |
---|
| 686 | #endif |
---|
| 687 | |
---|
| 688 | void |
---|
| 689 | pppallocmbuf(struct ppp_softc *sc, struct mbuf **mp) |
---|
| 690 | { |
---|
| 691 | int ilen; |
---|
| 692 | struct mbuf *m; |
---|
| 693 | |
---|
| 694 | /* loop over length value */ |
---|
| 695 | ilen = sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN; |
---|
| 696 | while ( ilen > 0 ) { |
---|
| 697 | /* see if this is end of the chain */ |
---|
| 698 | m = *mp; |
---|
| 699 | if ( m == NULL ) { |
---|
| 700 | /* get mbuf header */ |
---|
| 701 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
---|
| 702 | if ( m == NULL ) { |
---|
| 703 | /* error - set condition to break out */ |
---|
| 704 | printf("pppallocmbuf: MGETHDR failed\n"); |
---|
| 705 | break; |
---|
| 706 | } |
---|
| 707 | MCLGET(m, M_DONTWAIT); |
---|
| 708 | m->m_next = NULL; |
---|
| 709 | *mp = m; |
---|
| 710 | } |
---|
| 711 | |
---|
| 712 | /* update loop variables */ |
---|
| 713 | mp = &m->m_next; |
---|
| 714 | ilen -= M_DATASIZE(m); |
---|
| 715 | } |
---|
| 716 | } |
---|
| 717 | |
---|
| 718 | /* |
---|
| 719 | * tty interface receiver interrupt. |
---|
| 720 | */ |
---|
| 721 | static unsigned paritytab[8] = { |
---|
| 722 | 0x96696996, 0x69969669, 0x69969669, 0x96696996, |
---|
| 723 | 0x69969669, 0x96696996, 0x96696996, 0x69969669 |
---|
| 724 | }; |
---|
| 725 | |
---|
| 726 | int |
---|
| 727 | pppinput(int c, struct rtems_termios_tty *tp) |
---|
| 728 | { |
---|
| 729 | register struct ppp_softc *sc = tp->t_sc; |
---|
| 730 | struct mbuf *m; |
---|
| 731 | int ilen; |
---|
| 732 | |
---|
| 733 | if (sc == NULL || tp != (struct rtems_termios_tty *)sc->sc_devp) |
---|
| 734 | return 0; |
---|
| 735 | if (sc->sc_m == NULL) { |
---|
| 736 | rtems_event_send(sc->sc_rxtask, RX_EMPTY); |
---|
| 737 | IF_DEQUEUE(&sc->sc_freeq, sc->sc_m); |
---|
| 738 | if ( sc->sc_m == NULL ) { |
---|
| 739 | return 0; |
---|
| 740 | } |
---|
| 741 | } |
---|
| 742 | |
---|
| 743 | ++sc->sc_stats.ppp_ibytes; |
---|
| 744 | |
---|
| 745 | c &= 0xff; |
---|
| 746 | if (c & 0x80) |
---|
| 747 | sc->sc_flags |= SC_RCV_B7_1; |
---|
| 748 | else |
---|
| 749 | sc->sc_flags |= SC_RCV_B7_0; |
---|
| 750 | if (paritytab[c >> 5] & (1 << (c & 0x1F))) |
---|
| 751 | sc->sc_flags |= SC_RCV_ODDP; |
---|
| 752 | else |
---|
| 753 | sc->sc_flags |= SC_RCV_EVNP; |
---|
| 754 | |
---|
| 755 | if (c == PPP_FLAG) { |
---|
| 756 | ilen = sc->sc_ilen; |
---|
| 757 | sc->sc_ilen = 0; |
---|
| 758 | |
---|
| 759 | /* |
---|
| 760 | * If SC_ESCAPED is set, then we've seen the packet |
---|
| 761 | * abort sequence "}~". |
---|
| 762 | */ |
---|
| 763 | if (sc->sc_flags & (SC_FLUSH | SC_ESCAPED) |
---|
| 764 | || (ilen > 0 && sc->sc_fcs != PPP_GOODFCS)) { |
---|
| 765 | sc->sc_flags |= SC_PKTLOST; /* note the dropped packet */ |
---|
| 766 | if ((sc->sc_flags & (SC_FLUSH | SC_ESCAPED)) == 0){ |
---|
| 767 | /* bad fcs error */ |
---|
| 768 | sc->sc_if.if_ierrors++; |
---|
| 769 | sc->sc_stats.ppp_ierrors++; |
---|
| 770 | } else |
---|
| 771 | sc->sc_flags &= ~(SC_FLUSH | SC_ESCAPED); |
---|
| 772 | return 0; |
---|
| 773 | } |
---|
| 774 | |
---|
| 775 | if (ilen < PPP_HDRLEN + PPP_FCSLEN) { |
---|
| 776 | if (ilen) { |
---|
| 777 | /* too short error */ |
---|
| 778 | sc->sc_if.if_ierrors++; |
---|
| 779 | sc->sc_stats.ppp_ierrors++; |
---|
| 780 | sc->sc_flags |= SC_PKTLOST; |
---|
| 781 | } |
---|
| 782 | return 0; |
---|
| 783 | } |
---|
| 784 | |
---|
| 785 | /* Remove FCS trailer. Somewhat painful... */ |
---|
| 786 | ilen -= 2; |
---|
| 787 | if (--sc->sc_mc->m_len == 0) { |
---|
| 788 | for (m = sc->sc_m; m->m_next != sc->sc_mc; m = m->m_next); |
---|
| 789 | sc->sc_mc = m; |
---|
| 790 | } |
---|
| 791 | sc->sc_mc->m_len--; |
---|
| 792 | |
---|
| 793 | /* excise this mbuf chain - place on raw queue */ |
---|
| 794 | m = sc->sc_m; |
---|
| 795 | if ( sc->sc_flags & SC_PKTLOST ) { |
---|
| 796 | m->m_flags |= M_ERRMARK; |
---|
| 797 | sc->sc_flags &= ~SC_PKTLOST; |
---|
| 798 | } |
---|
| 799 | IF_ENQUEUE(&sc->sc_rawq, m); |
---|
| 800 | |
---|
| 801 | /* setup next mbuf chain */ |
---|
| 802 | IF_DEQUEUE(&sc->sc_freeq, sc->sc_m); |
---|
| 803 | |
---|
| 804 | /* send rx packet event */ |
---|
| 805 | rtems_event_send(sc->sc_rxtask, RX_PACKET); |
---|
| 806 | return 0; |
---|
| 807 | } |
---|
| 808 | |
---|
| 809 | if (c < 0x20 && (sc->sc_rasyncmap & (1 << c))) |
---|
| 810 | return 0; |
---|
| 811 | |
---|
| 812 | if (sc->sc_flags & SC_ESCAPED) { |
---|
| 813 | sc->sc_flags &= ~SC_ESCAPED; |
---|
| 814 | c ^= PPP_TRANS; |
---|
| 815 | } else if (c == PPP_ESCAPE) { |
---|
| 816 | sc->sc_flags |= SC_ESCAPED; |
---|
| 817 | return 0; |
---|
| 818 | } |
---|
| 819 | |
---|
| 820 | /* |
---|
| 821 | * Initialize buffer on first octet received. |
---|
| 822 | * First octet could be address or protocol (when compressing |
---|
| 823 | * address/control). |
---|
| 824 | * Second octet is control. |
---|
| 825 | * Third octet is first or second (when compressing protocol) |
---|
| 826 | * octet of protocol. |
---|
| 827 | * Fourth octet is second octet of protocol. |
---|
| 828 | */ |
---|
| 829 | if (sc->sc_ilen == 0) { |
---|
| 830 | m = sc->sc_m; |
---|
| 831 | m->m_len = 0; |
---|
| 832 | m->m_data = M_DATASTART(sc->sc_m); |
---|
| 833 | sc->sc_mc = m; |
---|
| 834 | sc->sc_mp = mtod(m, char *); |
---|
| 835 | sc->sc_fcs = PPP_INITFCS; |
---|
| 836 | if (c != PPP_ALLSTATIONS) { |
---|
| 837 | if (sc->sc_flags & SC_REJ_COMP_AC) { |
---|
| 838 | /* garbage received error */ |
---|
| 839 | goto flush; |
---|
| 840 | } |
---|
| 841 | *sc->sc_mp++ = PPP_ALLSTATIONS; |
---|
| 842 | *sc->sc_mp++ = PPP_UI; |
---|
| 843 | sc->sc_ilen += 2; |
---|
| 844 | m->m_len += 2; |
---|
| 845 | } |
---|
| 846 | } |
---|
| 847 | if (sc->sc_ilen == 1 && c != PPP_UI) { |
---|
| 848 | /* missing UI error */ |
---|
| 849 | goto flush; |
---|
| 850 | } |
---|
| 851 | if (sc->sc_ilen == 2 && (c & 1) == 1) { |
---|
| 852 | /* a compressed protocol */ |
---|
| 853 | *sc->sc_mp++ = 0; |
---|
| 854 | sc->sc_ilen++; |
---|
| 855 | sc->sc_mc->m_len++; |
---|
| 856 | } |
---|
| 857 | if (sc->sc_ilen == 3 && (c & 1) == 0) { |
---|
| 858 | /* bad protocol error */ |
---|
| 859 | goto flush; |
---|
| 860 | } |
---|
| 861 | |
---|
| 862 | /* packet beyond configured mru? */ |
---|
| 863 | if (++sc->sc_ilen > sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN) { |
---|
| 864 | /* packet too big error */ |
---|
| 865 | goto flush; |
---|
| 866 | } |
---|
| 867 | |
---|
| 868 | /* is this mbuf full? */ |
---|
| 869 | m = sc->sc_mc; |
---|
| 870 | if (M_TRAILINGSPACE(m) <= 0) { |
---|
| 871 | if (m->m_next == NULL) { |
---|
| 872 | /* get next available mbuf for the chain */ |
---|
| 873 | IF_DEQUEUE(&sc->sc_freeq, m->m_next); |
---|
| 874 | if (m->m_next == NULL) { |
---|
| 875 | /* too few mbufs */ |
---|
| 876 | goto flush; |
---|
| 877 | } |
---|
| 878 | else { |
---|
| 879 | /* send rx mbuf event */ |
---|
| 880 | rtems_event_send(sc->sc_rxtask, RX_MBUF); |
---|
| 881 | } |
---|
| 882 | } |
---|
| 883 | sc->sc_mc = m = m->m_next; |
---|
| 884 | m->m_len = 0; |
---|
| 885 | m->m_next = 0; |
---|
| 886 | m->m_data = M_DATASTART(m); |
---|
| 887 | sc->sc_mp = mtod(m, char *); |
---|
| 888 | } |
---|
| 889 | |
---|
| 890 | ++m->m_len; |
---|
| 891 | *sc->sc_mp++ = c; |
---|
| 892 | sc->sc_fcs = PPP_FCS(sc->sc_fcs, c); |
---|
| 893 | return 0; |
---|
| 894 | |
---|
| 895 | flush: |
---|
| 896 | if (!(sc->sc_flags & SC_FLUSH)) { |
---|
| 897 | sc->sc_if.if_ierrors++; |
---|
| 898 | sc->sc_stats.ppp_ierrors++; |
---|
| 899 | sc->sc_flags |= SC_FLUSH; |
---|
| 900 | } |
---|
| 901 | return 0; |
---|
| 902 | } |
---|
| 903 | |
---|
| 904 | #ifdef XXX_XXX |
---|
| 905 | #define MAX_DUMP_BYTES 128 |
---|
| 906 | |
---|
| 907 | static void |
---|
| 908 | ppplogchar(sc, c) |
---|
| 909 | struct ppp_softc *sc; |
---|
| 910 | int c; |
---|
| 911 | { |
---|
| 912 | if (c >= 0) |
---|
| 913 | sc->sc_rawin[sc->sc_rawin_count++] = c; |
---|
| 914 | if (sc->sc_rawin_count >= sizeof(sc->sc_rawin) |
---|
| 915 | || (c < 0 && sc->sc_rawin_count > 0)) { |
---|
| 916 | printf("ppp%d input: ", sc->sc_if.if_unit); |
---|
| 917 | pppdumpb(sc->sc_rawin, sc->sc_rawin_count); |
---|
| 918 | sc->sc_rawin_count = 0; |
---|
| 919 | } |
---|
| 920 | } |
---|
| 921 | |
---|
| 922 | static void |
---|
| 923 | pppdumpb(b, l) |
---|
| 924 | u_char *b; |
---|
| 925 | int l; |
---|
| 926 | { |
---|
| 927 | char buf[3*MAX_DUMP_BYTES+4]; |
---|
| 928 | char *bp = buf; |
---|
| 929 | static char digits[] = "0123456789abcdef"; |
---|
| 930 | |
---|
| 931 | while (l--) { |
---|
| 932 | if (bp >= buf + sizeof(buf) - 3) { |
---|
| 933 | *bp++ = '>'; |
---|
| 934 | break; |
---|
| 935 | } |
---|
| 936 | *bp++ = digits[*b >> 4]; /* convert byte to ascii hex */ |
---|
| 937 | *bp++ = digits[*b++ & 0xf]; |
---|
| 938 | *bp++ = ' '; |
---|
| 939 | } |
---|
| 940 | |
---|
| 941 | *bp = 0; |
---|
| 942 | printf("%s\n", buf); |
---|
| 943 | } |
---|
| 944 | #endif |
---|
| 945 | |
---|
| 946 | #endif /* NPPP > 0 */ |
---|