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[wireshark-sm.git] / wiretap / busmaster_scanner.l
blobeeaa88f563e302e2c0e4f6c8a3eca03c443cc0ae
1 /* busmaster_scanner.l
2  *
3  * Wiretap Library
4  * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
5  *
6  * Support for Busmaster log file format
7  * Copyright (c) 2019 by Maksim Salau <maksim.salau@gmail.com>
8  *
9  * SPDX-License-Identifier: GPL-2.0-or-later
10  */
12 %top {
13 /* Include this before everything else, for various large-file definitions */
14 #include "config.h"
15 #include <wireshark.h>
18 %option noyywrap
19 %option noinput
20 %option nounput
21 %option batch
22 %option never-interactive
23 %option nodefault
24 %option prefix="busmaster_"
25 %option reentrant
26 %option extra-type="busmaster_state_t *"
28 %option noyy_scan_buffer
29 %option noyy_scan_bytes
30 %option noyy_scan_string
33  * We have to override the memory allocators so that we don't get
34  * "unused argument" warnings from the yyscanner argument (which
35  * we don't use, as we have a global memory allocator).
36  *
37  * We provide, as macros, our own versions of the routines generated by Flex,
38  * which just call malloc()/realloc()/free() (as the Flex versions do),
39  * discarding the extra argument.
40  */
41 %option noyyalloc
42 %option noyyrealloc
43 %option noyyfree
47 #include <ws_diag_control.h>
48 #include <wiretap/file_wrappers.h>
49 #include "busmaster_parser.h"
50 #include "busmaster_priv.h"
52 #ifndef HAVE_UNISTD_H
53 #define YY_NO_UNISTD_H
54 #endif
56 static int busmaster_yyinput(void *buf, unsigned int length, busmaster_state_t *state)
58     int ret = file_read(buf, length, state->fh);
60     if (ret < 0)
61     {
62         state->err = file_error(state->fh, &state->err_info);
63         return YY_NULL;
64     }
66     return ret;
69 #define YY_INPUT(buf, result, max_size) \
70     do { (result) = busmaster_yyinput((buf), (max_size), yyextra); } while (0)
72 /* Count bytes read. This is required in order to rewind the file
73  * to the beginning of the next packet, since flex reads more bytes
74  * before executing the action that does yyterminate(). */
75 #define YY_USER_ACTION do { yyextra->file_bytes_read += yyleng; } while (0);
78  * Sleazy hack to suppress compiler warnings in yy_fatal_error().
79  */
80 #define YY_EXIT_FAILURE ((void)yyscanner, 2)
83  * Macros for the allocators, to discard the extra argument.
84  */
85 #define busmaster_alloc(size, yyscanner)          (void *)malloc(size)
86 #define busmaster_realloc(ptr, size, yyscanner)   (void *)realloc((char *)(ptr), (size))
87 #define busmaster_free(ptr, yyscanner)            free((char *)(ptr))
89 DIAG_OFF_FLEX()
93 SPC [ \t]+
94 ENDL [\r\n][ \t\r\n]*
95 INT [0-9]+
96 NUM (0x)?[0-9A-Fa-f]+
98 %x HEADER TIME
99 %x HEADER_CHANNELS HEADER_DB_FILES
103 <*>{SPC}   ;
104 <INITIAL>{ENDL}               { yyterminate(); };
105 <HEADER,TIME>{ENDL}           { YY_FATAL_ERROR("Unterminated header statement"); }
107 "***"                         { BEGIN(HEADER); }
108 <HEADER,TIME>"***"{ENDL}"***" { BEGIN(HEADER); return TOKEN_ENDL; }
109 <HEADER>"***"{ENDL}           { BEGIN(INITIAL); yyterminate(); }
110 <HEADER>"BUSMASTER"           { return TOKEN_HEADER_VER; }
111 <HEADER>"PROTOCOL CAN"        { yyextra->token.v0 = PROTOCOL_CAN;   return TOKEN_PROTOCOL_TYPE; }
112 <HEADER>"PROTOCOL J1939"      { yyextra->token.v0 = PROTOCOL_J1939; return TOKEN_PROTOCOL_TYPE; }
113 <HEADER>"PROTOCOL LIN"        { yyextra->token.v0 = PROTOCOL_LIN;   return TOKEN_PROTOCOL_TYPE; }
114 <HEADER>"START DATE AND TIME" { BEGIN(TIME); return TOKEN_START_TIME; }
115 <HEADER>"END DATE AND TIME"   { BEGIN(TIME); return TOKEN_END_TIME; }
116 <HEADER>"DEC"                 { yyextra->token.v0 = DATA_MODE_DEC; return TOKEN_DATA_MODE; }
117 <HEADER>"HEX"                 { yyextra->token.v0 = DATA_MODE_HEX; return TOKEN_DATA_MODE; }
118 <HEADER>"ABSOLUTE MODE"       { yyextra->token.v0 = TIME_MODE_ABSOLUTE; return TOKEN_TIME_MODE; }
119 <HEADER>"SYSTEM MODE"         { yyextra->token.v0 = TIME_MODE_SYSTEM;   return TOKEN_TIME_MODE; }
120 <HEADER>"RELATIVE MODE"       { yyextra->token.v0 = TIME_MODE_RELATIVE; return TOKEN_TIME_MODE; }
121 <HEADER>"[START LOGGING SESSION]" { return TOKEN_START_SESSION; }
122 <HEADER>"[STOP LOGGING SESSION]" { return TOKEN_STOP_SESSION; }
123 <HEADER>"START CHANNEL BAUD RATE***" { BEGIN(HEADER_CHANNELS); }
124 <HEADER>"START DATABASE FILES (DBF/DBC)***" { BEGIN(HEADER_DB_FILES); }
125 <HEADER>.                     { return TOKEN_HEADER_CHAR; }
127 <HEADER_CHANNELS>"***END CHANNEL BAUD RATE***"{ENDL}"***" { BEGIN(HEADER); }
128 <HEADER_CHANNELS>.+           ;
129 <HEADER_CHANNELS>{ENDL}       ;
131 <HEADER_DB_FILES>"***END DATABASE FILES (DBF/DBC)***"{ENDL}"***" { BEGIN(HEADER); }
132 <HEADER_DB_FILES>"***END OF DATABASE FILES (DBF/DBC)***"{ENDL}"***" { BEGIN(HEADER); }
133 <HEADER_DB_FILES>.+           ;
134 <HEADER_DB_FILES>{ENDL}       ;
136 <TIME>{INT} { yyextra->token.v0 = strtoul(yytext, NULL, 10); return TOKEN_INT; }
137 <TIME>:     { return TOKEN_COLON; }
138 <TIME>.     { return TOKEN_INVALID_CHAR; }
140 <INITIAL>{INT}:{INT}:{INT}:{INT} {
141                     char *endp;
142                     char *strp;
144                     yyextra->token.v0 = strtoul(yytext, &endp, 10);
145                     if (*endp != ':' || endp == yytext)
146                         return TOKEN_INVALID_NUMBER;
148                     strp = endp + 1;
149                     yyextra->token.v1 = strtoul(strp, &endp, 10);
150                     if (*endp != ':' || endp == strp)
151                         return TOKEN_INVALID_NUMBER;
153                     strp = endp + 1;
154                     yyextra->token.v2 = strtoul(strp, &endp, 10);
155                     if (*endp != ':' || endp == strp)
156                         return TOKEN_INVALID_NUMBER;
158                     strp = endp + 1;
159                     yyextra->token.v3 = strtoul(strp, &endp, 10);
160                     if (*endp != '\0' || endp == strp)
161                         return TOKEN_INVALID_NUMBER;
163                     return TOKEN_MSG_TIME;
164                 }
166 <INITIAL>{NUM}  {
167                     char *endp;
169                     if (yyextra->header.data_mode == DATA_MODE_HEX)
170                         yyextra->token.v0 = strtoul(yytext, &endp, 16);
171                     else if (yyextra->header.data_mode == DATA_MODE_DEC)
172                         yyextra->token.v0 = strtoul(yytext, &endp, 10);
173                     else
174                         return TOKEN_INVALID_NUMBER;
176                     if (*endp != '\0' || endp == yytext)
177                         return TOKEN_INVALID_NUMBER;
179                     return TOKEN_INT;
180                 }
182 <INITIAL>[RT]x  { return TOKEN_MSG_DIR; }
183 <INITIAL>s      { yyextra->token.v0 = MSG_TYPE_STD;     return TOKEN_MSG_TYPE; }
184 <INITIAL>sr     { yyextra->token.v0 = MSG_TYPE_STD_RTR; return TOKEN_MSG_TYPE; }
185 <INITIAL>x      { yyextra->token.v0 = MSG_TYPE_EXT;     return TOKEN_MSG_TYPE; }
186 <INITIAL>xr     { yyextra->token.v0 = MSG_TYPE_EXT_RTR; return TOKEN_MSG_TYPE; }
187 <INITIAL>s-fd   { yyextra->token.v0 = MSG_TYPE_STD_FD;  return TOKEN_MSG_TYPE; }
188 <INITIAL>x-fd   { yyextra->token.v0 = MSG_TYPE_EXT_FD;  return TOKEN_MSG_TYPE; }
189 <INITIAL>ERR.*  { yyextra->token.v0 = MSG_TYPE_ERR;     return TOKEN_ERR_MSG_TYPE; }
191 <INITIAL>("NONE"|"CMD"|"RQST"|"DATA"|"BROADCAST"|"ACK"|"GRP_FUNC"|"ACL"|"RQST_ACL"|"CA"|"BAM"|"RTS"|"CTS"|"EOM"|"CON_ABORT"|"TPDT") {
192     return TOKEN_J1939_MSG_TYPE;
195 <INITIAL>.      { return TOKEN_INVALID_CHAR; }
199 DIAG_ON_FLEX()