lib/libnetgraph7/debug.c

   1 /*
   2  * debug.c
   3  *
   4  * Copyright (c) 1996-1999 Whistle Communications, Inc.
   5  * All rights reserved.
   6  *
   7  * Subject to the following obligations and disclaimer of warranty, use and
   8  * redistribution of this software, in source or object code forms, with or
   9  * without modifications are expressly permitted by Whistle Communications;
  10  * provided, however, that:
  11  * 1. Any and all reproductions of the source or object code must include the
  12  *    copyright notice above and the following disclaimer of warranties; and
  13  * 2. No rights are granted, in any manner or form, to use Whistle
  14  *    Communications, Inc. trademarks, including the mark "WHISTLE
  15  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
  16  *    such appears in the above copyright notice or in the software.
  17  *
  18  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
  19  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
  20  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
  21  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
  23  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
  24  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
  25  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
  26  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
  27  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
  28  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
  29  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
  30  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
  31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  33  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
  34  * OF SUCH DAMAGE.
  35  *
  36  * Author: Archie Cobbs <archie@whistle.com>
  37  *
  38  * $FreeBSD: src/lib/libnetgraph/debug.c,v 1.9 2005/10/25 20:58:30 ru Exp $
  39  * $Whistle: debug.c,v 1.24 1999/01/24 01:15:33 archie Exp $
  40  */
  41
  42 #include <sys/types.h>
  43 #include <sys/time.h>
  44 #include <sys/ioctl.h>
  45
  46 #include <stdarg.h>
  47
  48 #include <netinet/in.h>
  49 #include <net/ethernet.h>
  50 #include <net/bpf.h>
  51
  52 #include <netgraph7/ng_message.h>
  53 #include <netgraph7/socket/ng_socket.h>
  54
  55 #include "netgraph.h"
  56 #include "internal.h"
  57
  58 #include <netgraph7/UI/ng_UI.h>
  59 #include <netgraph7/async/ng_async.h>
  60 #include <netgraph7/bpf/ng_bpf.h>
  61 #include <netgraph/bridge/ng_bridge.h>
  62 #include <netgraph7/cisco/ng_cisco.h>
  63 #include <netgraph7/deflate/ng_deflate.h>
  64 #include <netgraph7/echo/ng_echo.h>
  65 #include <netgraph7/eiface/ng_eiface.h>
  66 #include <netgraph7/etf/ng_etf.h>
  67 #include <netgraph7/ether/ng_ether.h>
  68 /*
  69 #include <netgraph7/fec/ng_fec.h>
  70 */
  71 #include <netgraph7/frame_relay/ng_frame_relay.h>
  72 #include <netgraph7/hole/ng_hole.h>
  73 #include <netgraph7/hub/ng_hub.h>
  74 #include <netgraph7/iface/ng_iface.h>
  75 /*
  76 #include <netgraph7/ip_input/ng_ip_input.h>
  77 */
  78 #include <netgraph7/ksocket/ng_ksocket.h>
  79 #include <netgraph7/l2tp/ng_l2tp.h>
  80 #include <netgraph7/lmi/ng_lmi.h>
  81 #include <netgraph7/mppc/ng_mppc.h>
  82 #include <netgraph7/one2many/ng_one2many.h>
  83 #include <netgraph7/ppp/ng_ppp.h>
  84 #include <netgraph7/pppoe/ng_pppoe.h>
  85 #include <netgraph7/pptpgre/ng_pptpgre.h>
  86 #include <netgraph7/rfc1490/ng_rfc1490.h>
  87 /*
  88 #include <netgraph7/socket/ng_socket.h>
  89 #include <netgraph7/source/ng_source.h>
  90 #include <netgraph7/split/ng_split.h>
  91 */
  92 #include <netgraph7/tcpmss/ng_tcpmss.h>
  93 #include <netgraph7/tee/ng_tee.h>
  94 #include <netgraph7/tty/ng_tty.h>
  95 #include <netgraph7/vjc/ng_vjc.h>
  96 #ifdef  WHISTLE
  97 #include <machine/../isa/df_def.h>
  98 #include <machine/../isa/if_wfra.h>
  99 #include <machine/../isa/ipac.h>
 100 #include <netgraph/ng_df.h>
 101 #include <netgraph/ng_ipac.h>
 102 #include <netgraph/ng_tn.h>
 103 #endif
 104
 105 /* Global debug level */
 106 int     _gNgDebugLevel = 0;
 107
 108 /* Debug printing functions */
 109 void    (*_NgLog) (const char *fmt,...) = warn;
 110 void    (*_NgLogx) (const char *fmt,...) = warnx;
 111
 112 /* Internal functions */
 113 static const    char *NgCookie(int cookie);
 114
 115 /* Known typecookie list */
 116 struct ng_cookie {
 117         int             cookie;
 118         const char      *type;
 119 };
 120
 121 #define COOKIE(c)       { NGM_ ## c ## _COOKIE, #c }
 122
 123 /* List of known cookies */
 124 static const struct ng_cookie cookies[] = {
 125         COOKIE(UI),
 126         COOKIE(ASYNC),
 127         COOKIE(BPF),
 128         COOKIE(BRIDGE),
 129         COOKIE(CISCO),
 130         COOKIE(DEFLATE),
 131         COOKIE(ECHO),
 132 /*
 133         COOKIE(EIFACE),
 134 */
 135         COOKIE(ETF),
 136         COOKIE(ETHER),
 137 /*
 138         COOKIE(FEC),
 139 */
 140         COOKIE(FRAMERELAY),
 141         COOKIE(GENERIC),
 142         COOKIE(HOLE),
 143         COOKIE(HUB),
 144         COOKIE(IFACE),
 145 /*
 146         COOKIE(IP_INPUT),
 147 */
 148         COOKIE(KSOCKET),
 149         COOKIE(L2TP),
 150         COOKIE(LMI),
 151         COOKIE(MPPC),
 152         COOKIE(ONE2MANY),
 153         COOKIE(PPP),
 154         COOKIE(PPPOE),
 155         COOKIE(PPTPGRE),
 156         COOKIE(RFC1490),
 157         COOKIE(SOCKET),
 158 /*
 159         COOKIE(SOURCE),
 160         COOKIE(SPLIT),
 161 */
 162         COOKIE(TCPMSS),
 163         COOKIE(TEE),
 164         COOKIE(TTY),
 165         COOKIE(VJC),
 166 #ifdef WHISTLE
 167         COOKIE(DF),
 168         COOKIE(IPAC),
 169         COOKIE(TN),
 170         COOKIE(WFRA),
 171 #endif
 172         { 0, NULL }
 173 };
 174
 175 /*
 176  * Set debug level, ie, verbosity, if "level" is non-negative.
 177  * Returns old debug level.
 178  */
 179 int
 180 NgSetDebug(int level)
 181 {
 182         int old = _gNgDebugLevel;
 183
 184         if (level < 0)
 185                 level = old;
 186         _gNgDebugLevel = level;
 187         return (old);
 188 }
 189
 190 /*
 191  * Set debug logging functions.
 192  */
 193 void
 194 NgSetErrLog(void (*log) (const char *fmt,...),
 195                 void (*logx) (const char *fmt,...))
 196 {
 197         _NgLog = log;
 198         _NgLogx = logx;
 199 }
 200
 201 /*
 202  * Display a netgraph sockaddr
 203  */
 204 void
 205 _NgDebugSockaddr(const struct sockaddr_ng *sg)
 206 {
 207         NGLOGX("SOCKADDR: { fam=%d len=%d addr=\"%s\" }",
 208                sg->sg_family, sg->sg_len, sg->sg_data);
 209 }
 210
 211 #define ARGS_BUFSIZE            2048
 212 #define RECURSIVE_DEBUG_ADJUST  4
 213
 214 /*
 215  * Display a negraph message
 216  */
 217 void
 218 _NgDebugMsg(const struct ng_mesg *msg, const char *path)
 219 {
 220         u_char buf[2 * sizeof(struct ng_mesg) + ARGS_BUFSIZE];
 221         struct ng_mesg *const req = (struct ng_mesg *)buf;
 222         struct ng_mesg *const bin = (struct ng_mesg *)req->data;
 223         int arglen, csock = -1;
 224
 225         /* Display header stuff */
 226         NGLOGX("NG_MESG :");
 227         NGLOGX("  vers   %d", msg->header.version);
 228         NGLOGX("  arglen %d", msg->header.arglen);
 229         NGLOGX("  flags  %ld", msg->header.flags);
 230         NGLOGX("  token  %lu", (u_long)msg->header.token);
 231         NGLOGX("  cookie %s (%d)",
 232             NgCookie(msg->header.typecookie), msg->header.typecookie);
 233
 234         /* At lower debugging levels, skip ASCII translation */
 235         if (_gNgDebugLevel <= 2)
 236                 goto fail2;
 237
 238         /* If path is not absolute, don't bother trying to use relative
 239            address on a different socket for the ASCII translation */
 240         if (strchr(path, ':') == NULL)
 241                 goto fail2;
 242
 243         /* Get a temporary socket */
 244         if (NgMkSockNode(NULL, &csock, NULL) < 0)
 245                 goto fail;
 246
 247         /* Copy binary message into request message payload */
 248         arglen = msg->header.arglen;
 249         if (arglen > ARGS_BUFSIZE)
 250                 arglen = ARGS_BUFSIZE;
 251         memcpy(bin, msg, sizeof(*msg) + arglen);
 252         bin->header.arglen = arglen;
 253
 254         /* Lower debugging to avoid infinite recursion */
 255         _gNgDebugLevel -= RECURSIVE_DEBUG_ADJUST;
 256
 257         /* Ask the node to translate the binary message to ASCII for us */
 258         if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE,
 259             NGM_BINARY2ASCII, bin, sizeof(*bin) + bin->header.arglen) < 0) {
 260                 _gNgDebugLevel += RECURSIVE_DEBUG_ADJUST;
 261                 goto fail;
 262         }
 263         if (NgRecvMsg(csock, req, sizeof(buf), NULL) < 0) {
 264                 _gNgDebugLevel += RECURSIVE_DEBUG_ADJUST;
 265                 goto fail;
 266         }
 267
 268         /* Restore debugging level */
 269         _gNgDebugLevel += RECURSIVE_DEBUG_ADJUST;
 270
 271         /* Display command string and arguments */
 272         NGLOGX("  cmd    %s (%d)", bin->header.cmdstr, bin->header.cmd);
 273         NGLOGX("  args   %s", bin->data);
 274         goto done;
 275
 276 fail:
 277         /* Just display binary version */
 278         NGLOGX("  [error decoding message: %s]", strerror(errno));
 279 fail2:
 280         NGLOGX("  cmd    %d", msg->header.cmd);
 281         NGLOGX("  args (%d bytes)", msg->header.arglen);
 282         _NgDebugBytes(msg->data, msg->header.arglen);
 283
 284 done:
 285         if (csock != -1)
 286                 (void)close(csock);
 287 }
 288
 289 /*
 290  * Return the name of the node type corresponding to the cookie
 291  */
 292 static const char *
 293 NgCookie(int cookie)
 294 {
 295         int k;
 296
 297         for (k = 0; cookies[k].cookie != 0; k++) {
 298                 if (cookies[k].cookie == cookie)
 299                         return cookies[k].type;
 300         }
 301         return "??";
 302 }
 303
 304 /*
 305  * Dump bytes in hex
 306  */
 307 void
 308 _NgDebugBytes(const u_char *ptr, int len)
 309 {
 310         char    buf[100];
 311         int     k, count;
 312
 313 #define BYPERLINE       16
 314
 315         for (count = 0; count < len; ptr += BYPERLINE, count += BYPERLINE) {
 316
 317                 /* Do hex */
 318                 snprintf(buf, sizeof(buf), "%04x:  ", count);
 319                 for (k = 0; k < BYPERLINE; k++, count++)
 320                         if (count < len)
 321                                 snprintf(buf + strlen(buf),
 322                                     sizeof(buf) - strlen(buf), "%02x ", ptr[k]);
 323                         else
 324                                 snprintf(buf + strlen(buf),
 325                                     sizeof(buf) - strlen(buf), "   ");
 326                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "  ");
 327                 count -= BYPERLINE;
 328
 329                 /* Do ASCII */
 330                 for (k = 0; k < BYPERLINE; k++, count++)
 331                         if (count < len)
 332                                 snprintf(buf + strlen(buf),
 333                                     sizeof(buf) - strlen(buf),
 334                                     "%c", isprint(ptr[k]) ? ptr[k] : '.');
 335                         else
 336                                 snprintf(buf + strlen(buf),
 337                                     sizeof(buf) - strlen(buf), "  ");
 338                 count -= BYPERLINE;
 339
 340                 /* Print it */
 341                 NGLOGX("%s", buf);
 342         }
 343 }
 344