diff options
Diffstat (limited to 'contrib/ipfilter/tools/lexer.c')
| -rw-r--r-- | contrib/ipfilter/tools/lexer.c | 661 |
1 files changed, 0 insertions, 661 deletions
diff --git a/contrib/ipfilter/tools/lexer.c b/contrib/ipfilter/tools/lexer.c deleted file mode 100644 index 1ad00c4..0000000 --- a/contrib/ipfilter/tools/lexer.c +++ /dev/null @@ -1,661 +0,0 @@ -/* - * Copyright (C) 2002-2006 by Darren Reed. - * - * See the IPFILTER.LICENCE file for details on licencing. - */ -#include <ctype.h> -#include "ipf.h" -#ifdef IPFILTER_SCAN -# include "netinet/ip_scan.h" -#endif -#include <sys/ioctl.h> -#include <syslog.h> -#ifdef TEST_LEXER -# define NO_YACC -union { - int num; - char *str; - struct in_addr ipa; - i6addr_t ip6; -} yylval; -#endif -#include "lexer.h" -#include "y.tab.h" - -FILE *yyin; - -#define ishex(c) (ISDIGIT(c) || ((c) >= 'a' && (c) <= 'f') || \ - ((c) >= 'A' && (c) <= 'F')) -#define TOOLONG -3 - -extern int string_start; -extern int string_end; -extern char *string_val; -extern int pos; -extern int yydebug; - -char *yystr = NULL; -int yytext[YYBUFSIZ+1]; -char yychars[YYBUFSIZ+1]; -int yylineNum = 1; -int yypos = 0; -int yylast = -1; -int yyexpectaddr = 0; -int yybreakondot = 0; -int yyvarnext = 0; -int yytokentype = 0; -wordtab_t *yywordtab = NULL; -int yysavedepth = 0; -wordtab_t *yysavewords[30]; - - -static wordtab_t *yyfindkey __P((char *)); -static int yygetc __P((int)); -static void yyunputc __P((int)); -static int yyswallow __P((int)); -static char *yytexttostr __P((int, int)); -static void yystrtotext __P((char *)); -static char *yytexttochar __P((void)); - -static int yygetc(docont) -int docont; -{ - int c; - - if (yypos < yylast) { - c = yytext[yypos++]; - if (c == '\n') - yylineNum++; - return c; - } - - if (yypos == YYBUFSIZ) - return TOOLONG; - - if (pos >= string_start && pos <= string_end) { - c = string_val[pos - string_start]; - yypos++; - } else { - c = fgetc(yyin); - if (docont && (c == '\\')) { - c = fgetc(yyin); - if (c == '\n') { - yylineNum++; - c = fgetc(yyin); - } - } - } - if (c == '\n') - yylineNum++; - yytext[yypos++] = c; - yylast = yypos; - yytext[yypos] = '\0'; - - return c; -} - - -static void yyunputc(c) -int c; -{ - if (c == '\n') - yylineNum--; - yytext[--yypos] = c; -} - - -static int yyswallow(last) -int last; -{ - int c; - - while (((c = yygetc(0)) > '\0') && (c != last)) - ; - - if (c != EOF) - yyunputc(c); - if (c == last) - return 0; - return -1; -} - - -static char *yytexttochar() -{ - int i; - - for (i = 0; i < yypos; i++) - yychars[i] = (char)(yytext[i] & 0xff); - yychars[i] = '\0'; - return yychars; -} - - -static void yystrtotext(str) -char *str; -{ - int len; - char *s; - - len = strlen(str); - if (len > YYBUFSIZ) - len = YYBUFSIZ; - - for (s = str; *s != '\0' && len > 0; s++, len--) - yytext[yylast++] = *s; - yytext[yylast] = '\0'; -} - - -static char *yytexttostr(offset, max) -int offset, max; -{ - char *str; - int i; - - if ((yytext[offset] == '\'' || yytext[offset] == '"') && - (yytext[offset] == yytext[offset + max - 1])) { - offset++; - max--; - } - - if (max > yylast) - max = yylast; - str = malloc(max + 1); - if (str != NULL) { - for (i = offset; i < max; i++) - str[i - offset] = (char)(yytext[i] & 0xff); - str[i - offset] = '\0'; - } - return str; -} - - -int yylex() -{ - int c, n, isbuilding, rval, lnext, nokey = 0; - char *name; - - isbuilding = 0; - lnext = 0; - rval = 0; - - if (yystr != NULL) { - free(yystr); - yystr = NULL; - } - -nextchar: - c = yygetc(0); - if (yydebug > 1) - printf("yygetc = (%x) %c [%*.*s]\n", c, c, yypos, yypos, yytexttochar()); - - switch (c) - { - case '\n' : - lnext = 0; - nokey = 0; - case '\t' : - case '\r' : - case ' ' : - if (isbuilding == 1) { - yyunputc(c); - goto done; - } - if (yylast > yypos) { - bcopy(yytext + yypos, yytext, - sizeof(yytext[0]) * (yylast - yypos + 1)); - } - yylast -= yypos; - yypos = 0; - lnext = 0; - nokey = 0; - goto nextchar; - - case '\\' : - if (lnext == 0) { - lnext = 1; - if (yylast == yypos) { - yylast--; - yypos--; - } else - yypos--; - if (yypos == 0) - nokey = 1; - goto nextchar; - } - break; - } - - if (lnext == 1) { - lnext = 0; - if ((isbuilding == 0) && !ISALNUM(c)) { - return c; - } - goto nextchar; - } - - switch (c) - { - case '#' : - if (isbuilding == 1) { - yyunputc(c); - goto done; - } - yyswallow('\n'); - rval = YY_COMMENT; - goto nextchar; - - case '$' : - if (isbuilding == 1) { - yyunputc(c); - goto done; - } - n = yygetc(0); - if (n == '{') { - if (yyswallow('}') == -1) { - rval = -2; - goto done; - } - (void) yygetc(0); - } else { - if (!ISALPHA(n)) { - yyunputc(n); - break; - } - do { - n = yygetc(1); - } while (ISALPHA(n) || ISDIGIT(n) || n == '_'); - yyunputc(n); - } - - name = yytexttostr(1, yypos); /* skip $ */ - - if (name != NULL) { - string_val = get_variable(name, NULL, yylineNum); - free(name); - if (string_val != NULL) { - name = yytexttostr(yypos, yylast); - if (name != NULL) { - yypos = 0; - yylast = 0; - yystrtotext(string_val); - yystrtotext(name); - free(string_val); - free(name); - goto nextchar; - } - free(string_val); - } - } - break; - - case '\'': - case '"' : - if (isbuilding == 1) { - goto done; - } - do { - n = yygetc(1); - if (n == EOF || n == TOOLONG) { - rval = -2; - goto done; - } - if (n == '\n') { - yyunputc(' '); - yypos++; - } - } while (n != c); - rval = YY_STR; - goto done; - /* NOTREACHED */ - - case EOF : - yylineNum = 1; - yypos = 0; - yylast = -1; - yyexpectaddr = 0; - yybreakondot = 0; - yyvarnext = 0; - yytokentype = 0; - return 0; - } - - if (strchr("=,/;{}()@", c) != NULL) { - if (isbuilding == 1) { - yyunputc(c); - goto done; - } - rval = c; - goto done; - } else if (c == '.') { - if (isbuilding == 0) { - rval = c; - goto done; - } - if (yybreakondot != 0) { - yyunputc(c); - goto done; - } - } - - switch (c) - { - case '-' : - if (yyexpectaddr) - break; - if (isbuilding == 1) - break; - n = yygetc(0); - if (n == '>') { - isbuilding = 1; - goto done; - } - yyunputc(n); - rval = '-'; - goto done; - - case '!' : - if (isbuilding == 1) { - yyunputc(c); - goto done; - } - n = yygetc(0); - if (n == '=') { - rval = YY_CMP_NE; - goto done; - } - yyunputc(n); - rval = '!'; - goto done; - - case '<' : - if (yyexpectaddr) - break; - if (isbuilding == 1) { - yyunputc(c); - goto done; - } - n = yygetc(0); - if (n == '=') { - rval = YY_CMP_LE; - goto done; - } - if (n == '>') { - rval = YY_RANGE_OUT; - goto done; - } - yyunputc(n); - rval = YY_CMP_LT; - goto done; - - case '>' : - if (yyexpectaddr) - break; - if (isbuilding == 1) { - yyunputc(c); - goto done; - } - n = yygetc(0); - if (n == '=') { - rval = YY_CMP_GE; - goto done; - } - if (n == '<') { - rval = YY_RANGE_IN; - goto done; - } - yyunputc(n); - rval = YY_CMP_GT; - goto done; - } - - /* - * Now for the reason this is here...IPv6 address parsing. - * The longest string we can expect is of this form: - * 0000:0000:0000:0000:0000:0000:000.000.000.000 - * not: - * 0000:0000:0000:0000:0000:0000:0000:0000 - */ -#ifdef USE_INET6 - if (yyexpectaddr == 1 && isbuilding == 0 && (ishex(c) || c == ':')) { - char ipv6buf[45 + 1], *s, oc; - int start; - - start = yypos; - s = ipv6buf; - oc = c; - - /* - * Perhaps we should implement stricter controls on what we - * swallow up here, but surely it would just be duplicating - * the code in inet_pton() anyway. - */ - do { - *s++ = c; - c = yygetc(1); - } while ((ishex(c) || c == ':' || c == '.') && - (s - ipv6buf < 46)); - yyunputc(c); - *s = '\0'; - - if (inet_pton(AF_INET6, ipv6buf, &yylval.ip6) == 1) { - rval = YY_IPV6; - yyexpectaddr = 0; - goto done; - } - yypos = start; - c = oc; - } -#endif - - if (c == ':') { - if (isbuilding == 1) { - yyunputc(c); - goto done; - } - rval = ':'; - goto done; - } - - if (isbuilding == 0 && c == '0') { - n = yygetc(0); - if (n == 'x') { - do { - n = yygetc(1); - } while (ishex(n)); - yyunputc(n); - rval = YY_HEX; - goto done; - } - yyunputc(n); - } - - /* - * No negative numbers with leading - sign.. - */ - if (isbuilding == 0 && ISDIGIT(c)) { - do { - n = yygetc(1); - } while (ISDIGIT(n)); - yyunputc(n); - rval = YY_NUMBER; - goto done; - } - - isbuilding = 1; - goto nextchar; - -done: - yystr = yytexttostr(0, yypos); - - if (yydebug) - printf("isbuilding %d yyvarnext %d nokey %d\n", - isbuilding, yyvarnext, nokey); - if (isbuilding == 1) { - wordtab_t *w; - - w = NULL; - isbuilding = 0; - - if ((yyvarnext == 0) && (nokey == 0)) { - w = yyfindkey(yystr); - if (w == NULL && yywordtab != NULL) { - yyresetdict(); - w = yyfindkey(yystr); - } - } else - yyvarnext = 0; - if (w != NULL) - rval = w->w_value; - else - rval = YY_STR; - } - - if (rval == YY_STR && yysavedepth > 0) - yyresetdict(); - - yytokentype = rval; - - if (yydebug) - printf("lexed(%s) [%d,%d,%d] => %d @%d\n", yystr, string_start, - string_end, pos, rval, yysavedepth); - - switch (rval) - { - case YY_NUMBER : - sscanf(yystr, "%u", &yylval.num); - break; - - case YY_HEX : - sscanf(yystr, "0x%x", (u_int *)&yylval.num); - break; - - case YY_STR : - yylval.str = strdup(yystr); - break; - - default : - break; - } - - if (yylast > 0) { - bcopy(yytext + yypos, yytext, - sizeof(yytext[0]) * (yylast - yypos + 1)); - yylast -= yypos; - yypos = 0; - } - - return rval; -} - - -static wordtab_t *yyfindkey(key) -char *key; -{ - wordtab_t *w; - - if (yywordtab == NULL) - return NULL; - - for (w = yywordtab; w->w_word != 0; w++) - if (strcasecmp(key, w->w_word) == 0) - return w; - return NULL; -} - - -char *yykeytostr(num) -int num; -{ - wordtab_t *w; - - if (yywordtab == NULL) - return "<unknown>"; - - for (w = yywordtab; w->w_word; w++) - if (w->w_value == num) - return w->w_word; - return "<unknown>"; -} - - -wordtab_t *yysettab(words) -wordtab_t *words; -{ - wordtab_t *save; - - save = yywordtab; - yywordtab = words; - return save; -} - - -void yyerror(msg) -char *msg; -{ - char *txt, letter[2]; - int freetxt = 0; - - if (yytokentype < 256) { - letter[0] = yytokentype; - letter[1] = '\0'; - txt = letter; - } else if (yytokentype == YY_STR || yytokentype == YY_HEX || - yytokentype == YY_NUMBER) { - if (yystr == NULL) { - txt = yytexttostr(yypos, YYBUFSIZ); - freetxt = 1; - } else - txt = yystr; - } else { - txt = yykeytostr(yytokentype); - } - fprintf(stderr, "%s error at \"%s\", line %d\n", msg, txt, yylineNum); - if (freetxt == 1) - free(txt); - exit(1); -} - - -void yysetdict(newdict) -wordtab_t *newdict; -{ - if (yysavedepth == sizeof(yysavewords)/sizeof(yysavewords[0])) { - fprintf(stderr, "%d: at maximum dictionary depth\n", - yylineNum); - return; - } - - yysavewords[yysavedepth++] = yysettab(newdict); - if (yydebug) - printf("yysavedepth++ => %d\n", yysavedepth); -} - -void yyresetdict() -{ - if (yydebug) - printf("yyresetdict(%d)\n", yysavedepth); - if (yysavedepth > 0) { - yysettab(yysavewords[--yysavedepth]); - if (yydebug) - printf("yysavedepth-- => %d\n", yysavedepth); - } -} - - - -#ifdef TEST_LEXER -int main(argc, argv) -int argc; -char *argv[]; -{ - int n; - - yyin = stdin; - - while ((n = yylex()) != 0) - printf("%d.n = %d [%s] %d %d\n", - yylineNum, n, yystr, yypos, yylast); -} -#endif |
