1 /* $OpenBSD: pfctl_osfp.c,v 1.14 2006/04/08 02:13:14 ray Exp $ */
4 * Copyright (c) 2003 Mike Frantzen <frantzen@openbsd.org>
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 #include <sys/cdefs.h>
20 __FBSDID("$FreeBSD$");
22 #include <sys/types.h>
23 #include <sys/ioctl.h>
24 #include <sys/socket.h>
27 #include <net/pfvar.h>
29 #include <netinet/in_systm.h>
30 #include <netinet/ip.h>
31 #include <netinet/ip6.h>
40 #include "pfctl_parser.h"
44 # define MIN(a,b) (((a) < (b)) ? (a) : (b))
47 # define MAX(a,b) (((a) > (b)) ? (a) : (b))
52 # define DEBUG(fp, str, v...) \
53 fprintf(stderr, "%s:%s:%s " str "\n", (fp)->fp_os.fp_class_nm, \
54 (fp)->fp_os.fp_version_nm, (fp)->fp_os.fp_subtype_nm , ## v);
56 # define DEBUG(fp, str, v...) ((void)0)
61 LIST_HEAD(name_list, name_entry);
63 LIST_ENTRY(name_entry) nm_entry;
65 char nm_name[PF_OSFP_LEN];
67 struct name_list nm_sublist;
70 static struct name_list classes = LIST_HEAD_INITIALIZER(&classes);
71 static int class_count;
72 static int fingerprint_count;
74 void add_fingerprint(int, int, struct pf_osfp_ioctl *);
75 struct name_entry *fingerprint_name_entry(struct name_list *, char *);
76 void pfctl_flush_my_fingerprints(struct name_list *);
77 char *get_field(char **, size_t *, int *);
78 int get_int(char **, size_t *, int *, int *, const char *,
79 int, int, const char *, int);
80 int get_str(char **, size_t *, char **, const char *, int,
82 int get_tcpopts(const char *, int, const char *,
83 pf_tcpopts_t *, int *, int *, int *, int *, int *,
85 void import_fingerprint(struct pf_osfp_ioctl *);
86 const char *print_ioctl(struct pf_osfp_ioctl *);
87 void print_name_list(int, struct name_list *, const char *);
88 void sort_name_list(int, struct name_list *);
89 struct name_entry *lookup_name_list(struct name_list *, const char *);
91 /* Load fingerprints from a file */
93 pfctl_file_fingerprints(int dev, int opts, const char *fp_filename)
99 int window, w_mod, ttl, df, psize, p_mod, mss, mss_mod, wscale,
100 wscale_mod, optcnt, ts0;
101 pf_tcpopts_t packed_tcpopts;
102 char *class, *version, *subtype, *desc, *tcpopts;
103 struct pf_osfp_ioctl fp;
105 pfctl_flush_my_fingerprints(&classes);
107 if ((in = pfctl_fopen(fp_filename, "r")) == NULL) {
108 warn("%s", fp_filename);
111 class = version = subtype = desc = tcpopts = NULL;
113 if ((opts & PF_OPT_NOACTION) == 0)
114 pfctl_clear_fingerprints(dev, opts);
116 while ((line = fgetln(in, &len)) != NULL) {
128 class = version = subtype = desc = tcpopts = NULL;
129 memset(&fp, 0, sizeof(fp));
131 /* Chop off comment */
132 for (i = 0; i < len; i++)
133 if (line[i] == '#') {
137 /* Chop off whitespace */
138 while (len > 0 && isspace(line[len - 1]))
140 while (len > 0 && isspace(line[0])) {
147 #define T_DC 0x01 /* Allow don't care */
148 #define T_MSS 0x02 /* Allow MSS multiple */
149 #define T_MTU 0x04 /* Allow MTU multiple */
150 #define T_MOD 0x08 /* Allow modulus */
152 #define GET_INT(v, mod, n, ty, mx) \
153 get_int(&line, &len, &v, mod, n, ty, mx, fp_filename, lineno)
154 #define GET_STR(v, n, mn) \
155 get_str(&line, &len, &v, n, mn, fp_filename, lineno)
157 if (GET_INT(window, &w_mod, "window size", T_DC|T_MSS|T_MTU|
159 GET_INT(ttl, NULL, "ttl", 0, 0xff) ||
160 GET_INT(df, NULL, "don't fragment frag", 0, 1) ||
161 GET_INT(psize, &p_mod, "overall packet size", T_MOD|T_DC,
163 GET_STR(tcpopts, "TCP Options", 1) ||
164 GET_STR(class, "OS class", 1) ||
165 GET_STR(version, "OS version", 0) ||
166 GET_STR(subtype, "OS subtype", 0) ||
167 GET_STR(desc, "OS description", 2))
169 if (get_tcpopts(fp_filename, lineno, tcpopts, &packed_tcpopts,
170 &optcnt, &mss, &mss_mod, &wscale, &wscale_mod, &ts0))
173 fprintf(stderr, "%s:%d excess field\n", fp_filename,
180 fp.fp_flags |= PF_OSFP_DF;
185 fp.fp_flags |= PF_OSFP_WSIZE_DC;
188 fp.fp_flags |= PF_OSFP_WSIZE_MSS;
191 fp.fp_flags |= PF_OSFP_WSIZE_MTU;
194 fp.fp_flags |= PF_OSFP_WSIZE_MOD;
197 fp.fp_wsize = window;
201 fp.fp_flags |= PF_OSFP_PSIZE_DC;
204 fp.fp_flags |= PF_OSFP_PSIZE_MOD;
209 switch (wscale_mod) {
211 fp.fp_flags |= PF_OSFP_WSCALE_DC;
214 fp.fp_flags |= PF_OSFP_WSCALE_MOD;
216 fp.fp_wscale = wscale;
220 fp.fp_flags |= PF_OSFP_MSS_DC;
223 fp.fp_flags |= PF_OSFP_MSS_MOD;
228 fp.fp_tcpopts = packed_tcpopts;
229 fp.fp_optcnt = optcnt;
231 fp.fp_flags |= PF_OSFP_TS0;
234 fp.fp_os.fp_enflags |= PF_OSFP_GENERIC;
236 fp.fp_os.fp_enflags |= PF_OSFP_NODETAIL;
238 if (class[0] == '@' || class[0] == '*')
239 strlcpy(fp.fp_os.fp_class_nm, class + 1,
240 sizeof(fp.fp_os.fp_class_nm));
242 strlcpy(fp.fp_os.fp_class_nm, class,
243 sizeof(fp.fp_os.fp_class_nm));
244 strlcpy(fp.fp_os.fp_version_nm, version,
245 sizeof(fp.fp_os.fp_version_nm));
246 strlcpy(fp.fp_os.fp_subtype_nm, subtype,
247 sizeof(fp.fp_os.fp_subtype_nm));
249 add_fingerprint(dev, opts, &fp);
251 fp.fp_flags |= (PF_OSFP_DF | PF_OSFP_INET6);
252 fp.fp_psize += sizeof(struct ip6_hdr) - sizeof(struct ip);
253 add_fingerprint(dev, opts, &fp);
269 if (opts & PF_OPT_VERBOSE2)
270 printf("Loaded %d passive OS fingerprints\n",
275 /* flush the kernel's fingerprints */
277 pfctl_clear_fingerprints(int dev, int opts)
279 if (ioctl(dev, DIOCOSFPFLUSH))
280 err(1, "DIOCOSFPFLUSH");
283 /* flush pfctl's view of the fingerprints */
285 pfctl_flush_my_fingerprints(struct name_list *list)
287 struct name_entry *nm;
289 while ((nm = LIST_FIRST(list)) != NULL) {
290 LIST_REMOVE(nm, nm_entry);
291 pfctl_flush_my_fingerprints(&nm->nm_sublist);
294 fingerprint_count = 0;
298 /* Fetch the active fingerprints from the kernel */
300 pfctl_load_fingerprints(int dev, int opts)
302 struct pf_osfp_ioctl io;
305 pfctl_flush_my_fingerprints(&classes);
307 for (i = 0; i >= 0; i++) {
308 memset(&io, 0, sizeof(io));
310 if (ioctl(dev, DIOCOSFPGET, &io)) {
316 import_fingerprint(&io);
321 /* List the fingerprints */
323 pfctl_show_fingerprints(int opts)
325 if (LIST_FIRST(&classes) != NULL) {
326 if (opts & PF_OPT_SHOWALL) {
327 pfctl_print_title("OS FINGERPRINTS:");
328 printf("%u fingerprints loaded\n", fingerprint_count);
330 printf("Class\tVersion\tSubtype(subversion)\n");
331 printf("-----\t-------\t-------------------\n");
332 sort_name_list(opts, &classes);
333 print_name_list(opts, &classes, "");
338 /* Lookup a fingerprint */
340 pfctl_get_fingerprint(const char *name)
342 struct name_entry *nm, *class_nm, *version_nm, *subtype_nm;
343 pf_osfp_t ret = PF_OSFP_NOMATCH;
344 int class, version, subtype;
345 int unp_class, unp_version, unp_subtype;
346 int wr_len, version_len, subtype_len;
349 if (strcasecmp(name, "unknown") == 0)
350 return (PF_OSFP_UNKNOWN);
352 /* Try most likely no version and no subtype */
353 if ((nm = lookup_name_list(&classes, name))) {
355 version = PF_OSFP_ANY;
356 subtype = PF_OSFP_ANY;
360 /* Chop it up into class/version/subtype */
362 if ((wr_name = strdup(name)) == NULL)
364 if ((ptr = strchr(wr_name, ' ')) == NULL) {
366 return (PF_OSFP_NOMATCH);
370 /* The class is easy to find since it is delimited by a space */
371 if ((class_nm = lookup_name_list(&classes, wr_name)) == NULL) {
373 return (PF_OSFP_NOMATCH);
375 class = class_nm->nm_num;
378 if ((version_nm = lookup_name_list(&class_nm->nm_sublist, ptr)))
380 version = version_nm->nm_num;
381 subtype = PF_OSFP_ANY;
388 * There must be a version and a subtype.
389 * We'll do some fuzzy matching to pick up things like:
390 * Linux 2.2.14 (version=2.2 subtype=14)
391 * FreeBSD 4.0-STABLE (version=4.0 subtype=STABLE)
392 * Windows 2000 SP2 (version=2000 subtype=SP2)
394 #define CONNECTOR(x) ((x) == '.' || (x) == ' ' || (x) == '\t' || (x) == '-')
395 wr_len = strlen(ptr);
396 LIST_FOREACH(version_nm, &class_nm->nm_sublist, nm_entry) {
397 version_len = strlen(version_nm->nm_name);
398 if (wr_len < version_len + 2 ||
399 !CONNECTOR(ptr[version_len]))
401 /* first part of the string must be version */
402 if (strncasecmp(ptr, version_nm->nm_name,
406 LIST_FOREACH(subtype_nm, &version_nm->nm_sublist,
408 subtype_len = strlen(subtype_nm->nm_name);
409 if (wr_len != version_len + subtype_len + 1)
412 /* last part of the string must be subtype */
413 if (strcasecmp(&ptr[version_len+1],
414 subtype_nm->nm_name) != 0)
418 version = version_nm->nm_num;
419 subtype = subtype_nm->nm_num;
426 return (PF_OSFP_NOMATCH);
430 PF_OSFP_PACK(ret, class, version, subtype);
431 if (ret != PF_OSFP_NOMATCH) {
432 PF_OSFP_UNPACK(ret, unp_class, unp_version, unp_subtype);
433 if (class != unp_class) {
434 fprintf(stderr, "warning: fingerprint table overflowed "
436 return (PF_OSFP_NOMATCH);
438 if (version != unp_version) {
439 fprintf(stderr, "warning: fingerprint table overflowed "
441 return (PF_OSFP_NOMATCH);
443 if (subtype != unp_subtype) {
444 fprintf(stderr, "warning: fingerprint table overflowed "
446 return (PF_OSFP_NOMATCH);
449 if (ret == PF_OSFP_ANY) {
450 /* should never happen */
451 fprintf(stderr, "warning: fingerprint packed to 'any'\n");
452 return (PF_OSFP_NOMATCH);
458 /* Lookup a fingerprint name by ID */
460 pfctl_lookup_fingerprint(pf_osfp_t fp, char *buf, size_t len)
462 int class, version, subtype;
463 struct name_list *list;
464 struct name_entry *nm;
466 char *class_name, *version_name, *subtype_name;
467 class_name = version_name = subtype_name = NULL;
469 if (fp == PF_OSFP_UNKNOWN) {
470 strlcpy(buf, "unknown", len);
473 if (fp == PF_OSFP_ANY) {
474 strlcpy(buf, "any", len);
478 PF_OSFP_UNPACK(fp, class, version, subtype);
479 if (class >= (1 << _FP_CLASS_BITS) ||
480 version >= (1 << _FP_VERSION_BITS) ||
481 subtype >= (1 << _FP_SUBTYPE_BITS)) {
482 warnx("PF_OSFP_UNPACK(0x%x) failed!!", fp);
483 strlcpy(buf, "nomatch", len);
487 LIST_FOREACH(nm, &classes, nm_entry) {
488 if (nm->nm_num == class) {
489 class_name = nm->nm_name;
490 if (version == PF_OSFP_ANY)
492 list = &nm->nm_sublist;
493 LIST_FOREACH(nm, list, nm_entry) {
494 if (nm->nm_num == version) {
495 version_name = nm->nm_name;
496 if (subtype == PF_OSFP_ANY)
498 list = &nm->nm_sublist;
499 LIST_FOREACH(nm, list, nm_entry) {
500 if (nm->nm_num == subtype) {
505 } /* foreach subtype */
506 strlcpy(buf, "nomatch", len);
509 } /* foreach version */
510 strlcpy(buf, "nomatch", len);
513 } /* foreach class */
515 strlcpy(buf, "nomatch", len);
519 snprintf(buf, len, "%s", class_name);
521 strlcat(buf, " ", len);
522 strlcat(buf, version_name, len);
524 if (strchr(version_name, ' '))
525 strlcat(buf, " ", len);
526 else if (strchr(version_name, '.') &&
527 isdigit(*subtype_name))
528 strlcat(buf, ".", len);
530 strlcat(buf, " ", len);
531 strlcat(buf, subtype_name, len);
537 /* lookup a name in a list */
539 lookup_name_list(struct name_list *list, const char *name)
541 struct name_entry *nm;
542 LIST_FOREACH(nm, list, nm_entry)
543 if (strcasecmp(name, nm->nm_name) == 0)
551 add_fingerprint(int dev, int opts, struct pf_osfp_ioctl *fp)
553 struct pf_osfp_ioctl fptmp;
554 struct name_entry *nm_class, *nm_version, *nm_subtype;
555 int class, version, subtype;
557 /* We expand #-# or #.#-#.# version/subtypes into multiple fingerprints */
558 #define EXPAND(field) do { \
559 int _dot = -1, _start = -1, _end = -1, _i = 0; \
560 /* pick major version out of #.# */ \
561 if (isdigit(fp->field[_i]) && fp->field[_i+1] == '.') { \
562 _dot = fp->field[_i] - '0'; \
565 if (isdigit(fp->field[_i])) \
566 _start = fp->field[_i++] - '0'; \
569 if (isdigit(fp->field[_i])) \
570 _start = (_start * 10) + fp->field[_i++] - '0'; \
571 if (fp->field[_i++] != '-') \
573 if (isdigit(fp->field[_i]) && fp->field[_i+1] == '.' && \
574 fp->field[_i] - '0' == _dot) \
576 else if (_dot != -1) \
578 if (isdigit(fp->field[_i])) \
579 _end = fp->field[_i++] - '0'; \
582 if (isdigit(fp->field[_i])) \
583 _end = (_end * 10) + fp->field[_i++] - '0'; \
584 if (isdigit(fp->field[_i])) \
585 _end = (_end * 10) + fp->field[_i++] - '0'; \
586 if (fp->field[_i] != '\0') \
588 memcpy(&fptmp, fp, sizeof(fptmp)); \
589 for (;_start <= _end; _start++) { \
590 memset(fptmp.field, 0, sizeof(fptmp.field)); \
591 fptmp.fp_os.fp_enflags |= PF_OSFP_EXPANDED; \
593 snprintf(fptmp.field, sizeof(fptmp.field), \
596 snprintf(fptmp.field, sizeof(fptmp.field), \
597 "%d.%d", _dot, _start); \
598 add_fingerprint(dev, opts, &fptmp); \
602 /* We allow "#-#" as a version or subtype and we'll expand it */
603 EXPAND(fp_os.fp_version_nm);
604 EXPAND(fp_os.fp_subtype_nm);
606 if (strcasecmp(fp->fp_os.fp_class_nm, "nomatch") == 0)
607 errx(1, "fingerprint class \"nomatch\" is reserved");
609 version = PF_OSFP_ANY;
610 subtype = PF_OSFP_ANY;
612 nm_class = fingerprint_name_entry(&classes, fp->fp_os.fp_class_nm);
613 if (nm_class->nm_num == 0)
614 nm_class->nm_num = ++class_count;
615 class = nm_class->nm_num;
617 nm_version = fingerprint_name_entry(&nm_class->nm_sublist,
618 fp->fp_os.fp_version_nm);
620 if (nm_version->nm_num == 0)
621 nm_version->nm_num = ++nm_class->nm_sublist_num;
622 version = nm_version->nm_num;
623 nm_subtype = fingerprint_name_entry(&nm_version->nm_sublist,
624 fp->fp_os.fp_subtype_nm);
626 if (nm_subtype->nm_num == 0)
628 ++nm_version->nm_sublist_num;
629 subtype = nm_subtype->nm_num;
634 DEBUG(fp, "\tsignature %d:%d:%d %s", class, version, subtype,
637 PF_OSFP_PACK(fp->fp_os.fp_os, class, version, subtype);
640 #ifdef FAKE_PF_KERNEL
641 /* Linked to the sys/net/pf_osfp.c. Call pf_osfp_add() */
642 if ((errno = pf_osfp_add(fp)))
644 if ((opts & PF_OPT_NOACTION) == 0 && ioctl(dev, DIOCOSFPADD, fp))
645 #endif /* FAKE_PF_KERNEL */
647 if (errno == EEXIST) {
648 warn("Duplicate signature for %s %s %s",
649 fp->fp_os.fp_class_nm,
650 fp->fp_os.fp_version_nm,
651 fp->fp_os.fp_subtype_nm);
654 err(1, "DIOCOSFPADD");
659 /* import a fingerprint from the kernel */
661 import_fingerprint(struct pf_osfp_ioctl *fp)
663 struct name_entry *nm_class, *nm_version, *nm_subtype;
664 int class, version, subtype;
666 PF_OSFP_UNPACK(fp->fp_os.fp_os, class, version, subtype);
668 nm_class = fingerprint_name_entry(&classes, fp->fp_os.fp_class_nm);
669 if (nm_class->nm_num == 0) {
670 nm_class->nm_num = class;
671 class_count = MAX(class_count, class);
674 nm_version = fingerprint_name_entry(&nm_class->nm_sublist,
675 fp->fp_os.fp_version_nm);
677 if (nm_version->nm_num == 0) {
678 nm_version->nm_num = version;
679 nm_class->nm_sublist_num = MAX(nm_class->nm_sublist_num,
682 nm_subtype = fingerprint_name_entry(&nm_version->nm_sublist,
683 fp->fp_os.fp_subtype_nm);
685 if (nm_subtype->nm_num == 0) {
686 nm_subtype->nm_num = subtype;
687 nm_version->nm_sublist_num =
688 MAX(nm_version->nm_sublist_num, subtype);
695 DEBUG(fp, "import signature %d:%d:%d", class, version, subtype);
698 /* Find an entry for a fingerprints class/version/subtype */
700 fingerprint_name_entry(struct name_list *list, char *name)
702 struct name_entry *nm_entry;
704 if (name == NULL || strlen(name) == 0)
707 LIST_FOREACH(nm_entry, list, nm_entry) {
708 if (strcasecmp(nm_entry->nm_name, name) == 0) {
709 /* We'll move this to the front of the list later */
710 LIST_REMOVE(nm_entry, nm_entry);
714 if (nm_entry == NULL) {
715 nm_entry = calloc(1, sizeof(*nm_entry));
716 if (nm_entry == NULL)
718 LIST_INIT(&nm_entry->nm_sublist);
719 strlcpy(nm_entry->nm_name, name, sizeof(nm_entry->nm_name));
721 LIST_INSERT_HEAD(list, nm_entry, nm_entry);
727 print_name_list(int opts, struct name_list *nml, const char *prefix)
730 struct name_entry *nm;
732 LIST_FOREACH(nm, nml, nm_entry) {
733 snprintf(newprefix, sizeof(newprefix), "%s%s\t", prefix,
735 printf("%s\n", newprefix);
736 print_name_list(opts, &nm->nm_sublist, newprefix);
741 sort_name_list(int opts, struct name_list *nml)
743 struct name_list new;
744 struct name_entry *nm, *nmsearch, *nmlast;
746 /* yes yes, it's a very slow sort. so sue me */
750 while ((nm = LIST_FIRST(nml)) != NULL) {
751 LIST_REMOVE(nm, nm_entry);
753 LIST_FOREACH(nmsearch, &new, nm_entry) {
754 if (strcasecmp(nmsearch->nm_name, nm->nm_name) > 0) {
755 LIST_INSERT_BEFORE(nmsearch, nm, nm_entry);
760 if (nmsearch == NULL) {
762 LIST_INSERT_AFTER(nmlast, nm, nm_entry);
764 LIST_INSERT_HEAD(&new, nm, nm_entry);
767 sort_name_list(opts, &nm->nm_sublist);
770 while ((nm = LIST_FIRST(&new)) != NULL) {
771 LIST_REMOVE(nm, nm_entry);
773 LIST_INSERT_HEAD(nml, nm, nm_entry);
775 LIST_INSERT_AFTER(nmlast, nm, nm_entry);
780 /* parse the next integer in a formatted config file line */
782 get_int(char **line, size_t *len, int *var, int *mod,
783 const char *name, int flags, int max, const char *filename, int lineno)
793 field = get_field(line, len, &fieldlen);
797 fprintf(stderr, "%s:%d empty %s\n", filename, lineno, name);
802 if ((*field == '%' || *field == 'S' || *field == 'T' || *field == '*')
806 if (mod && (flags & T_MSS))
812 if (mod && (flags & T_MTU))
819 fprintf(stderr, "%s:%d long '%c' %s\n",
820 filename, lineno, *field, name);
823 if (mod && (flags & T_DC)) {
828 if (mod && (flags & T_MOD))
831 fprintf(stderr, "%s:%d modulus %s must have a "
832 "value\n", filename, lineno, name);
837 if (mod == NULL || *mod == 0) {
838 fprintf(stderr, "%s:%d does not allow %c' %s\n",
839 filename, lineno, *field, name);
845 for (; i < fieldlen; i++) {
846 if (field[i] < '0' || field[i] > '9') {
847 fprintf(stderr, "%s:%d non-digit character in %s\n",
848 filename, lineno, name);
851 val = val * 10 + field[i] - '0';
853 fprintf(stderr, "%s:%d %s overflowed\n", filename,
860 fprintf(stderr, "%s:%d %s value %ld > %d\n", filename, lineno,
869 /* parse the next string in a formatted config file line */
871 get_str(char **line, size_t *len, char **v, const char *name, int minlen,
872 const char *filename, int lineno)
877 ptr = get_field(line, len, &fieldlen);
880 if (fieldlen < minlen) {
881 fprintf(stderr, "%s:%d too short %s\n", filename, lineno, name);
884 if ((*v = malloc(fieldlen + 1)) == NULL) {
888 memcpy(*v, ptr, fieldlen);
889 (*v)[fieldlen] = '\0';
894 /* Parse out the TCP opts */
896 get_tcpopts(const char *filename, int lineno, const char *tcpopts,
897 pf_tcpopts_t *packed, int *optcnt, int *mss, int *mss_mod, int *wscale,
898 int *wscale_mod, int *ts0)
909 if (strcmp(tcpopts, ".") == 0)
912 for (i = 0; tcpopts[i] && *optcnt < PF_OSFP_MAX_OPTS;) {
913 switch ((opt = toupper(tcpopts[i++]))) {
914 case 'N': /* FALLTHROUGH */
916 *packed = (*packed << PF_OSFP_TCPOPT_BITS) |
917 (opt == 'N' ? PF_OSFP_TCPOPT_NOP :
918 PF_OSFP_TCPOPT_SACK);
920 case 'W': /* FALLTHROUGH */
922 int *this_mod, *this;
926 this_mod = wscale_mod;
934 *packed = (*packed << PF_OSFP_TCPOPT_BITS) |
935 (opt == 'W' ? PF_OSFP_TCPOPT_WSCALE :
937 if (tcpopts[i] == '*' && (tcpopts[i + 1] == '\0' ||
938 tcpopts[i + 1] == ',')) {
944 if (tcpopts[i] == '%') {
949 if (!isdigit(tcpopts[i])) {
950 fprintf(stderr, "%s:%d unknown "
951 "character '%c' in %c TCP opt\n",
952 filename, lineno, tcpopts[i], opt);
955 *this = (*this * 10) + tcpopts[i++] - '0';
956 } while(tcpopts[i] != ',' && tcpopts[i] != '\0');
960 if (tcpopts[i] == '0') {
964 *packed = (*packed << PF_OSFP_TCPOPT_BITS) |
969 if (tcpopts[i] == '\0')
971 if (tcpopts[i] != ',') {
972 fprintf(stderr, "%s:%d unknown option to %c TCP opt\n",
973 filename, lineno, opt);
982 /* rip the next field ouf of a formatted config file line */
984 get_field(char **line, size_t *len, int *fieldlen)
986 char *ret, *ptr = *line;
990 while (plen && isspace(*ptr)) {
997 for (; plen > 0 && *ptr != ':'; plen--, ptr++)
1005 while (*fieldlen && isspace(ret[*fieldlen - 1]))
1012 print_ioctl(struct pf_osfp_ioctl *fp)
1014 static char buf[1024];
1019 if (fp->fp_flags & PF_OSFP_WSIZE_DC)
1020 strlcat(buf, "*", sizeof(buf));
1021 else if (fp->fp_flags & PF_OSFP_WSIZE_MSS)
1022 strlcat(buf, "S", sizeof(buf));
1023 else if (fp->fp_flags & PF_OSFP_WSIZE_MTU)
1024 strlcat(buf, "T", sizeof(buf));
1026 if (fp->fp_flags & PF_OSFP_WSIZE_MOD)
1027 strlcat(buf, "%", sizeof(buf));
1028 snprintf(tmp, sizeof(tmp), "%d", fp->fp_wsize);
1029 strlcat(buf, tmp, sizeof(buf));
1031 strlcat(buf, ":", sizeof(buf));
1033 snprintf(tmp, sizeof(tmp), "%d", fp->fp_ttl);
1034 strlcat(buf, tmp, sizeof(buf));
1035 strlcat(buf, ":", sizeof(buf));
1037 if (fp->fp_flags & PF_OSFP_DF)
1038 strlcat(buf, "1", sizeof(buf));
1040 strlcat(buf, "0", sizeof(buf));
1041 strlcat(buf, ":", sizeof(buf));
1043 if (fp->fp_flags & PF_OSFP_PSIZE_DC)
1044 strlcat(buf, "*", sizeof(buf));
1046 if (fp->fp_flags & PF_OSFP_PSIZE_MOD)
1047 strlcat(buf, "%", sizeof(buf));
1048 snprintf(tmp, sizeof(tmp), "%d", fp->fp_psize);
1049 strlcat(buf, tmp, sizeof(buf));
1051 strlcat(buf, ":", sizeof(buf));
1053 if (fp->fp_optcnt == 0)
1054 strlcat(buf, ".", sizeof(buf));
1055 for (i = fp->fp_optcnt - 1; i >= 0; i--) {
1056 opt = fp->fp_tcpopts >> (i * PF_OSFP_TCPOPT_BITS);
1057 opt &= (1 << PF_OSFP_TCPOPT_BITS) - 1;
1059 case PF_OSFP_TCPOPT_NOP:
1060 strlcat(buf, "N", sizeof(buf));
1062 case PF_OSFP_TCPOPT_SACK:
1063 strlcat(buf, "S", sizeof(buf));
1065 case PF_OSFP_TCPOPT_TS:
1066 strlcat(buf, "T", sizeof(buf));
1067 if (fp->fp_flags & PF_OSFP_TS0)
1068 strlcat(buf, "0", sizeof(buf));
1070 case PF_OSFP_TCPOPT_MSS:
1071 strlcat(buf, "M", sizeof(buf));
1072 if (fp->fp_flags & PF_OSFP_MSS_DC)
1073 strlcat(buf, "*", sizeof(buf));
1075 if (fp->fp_flags & PF_OSFP_MSS_MOD)
1076 strlcat(buf, "%", sizeof(buf));
1077 snprintf(tmp, sizeof(tmp), "%d", fp->fp_mss);
1078 strlcat(buf, tmp, sizeof(buf));
1081 case PF_OSFP_TCPOPT_WSCALE:
1082 strlcat(buf, "W", sizeof(buf));
1083 if (fp->fp_flags & PF_OSFP_WSCALE_DC)
1084 strlcat(buf, "*", sizeof(buf));
1086 if (fp->fp_flags & PF_OSFP_WSCALE_MOD)
1087 strlcat(buf, "%", sizeof(buf));
1088 snprintf(tmp, sizeof(tmp), "%d", fp->fp_wscale);
1089 strlcat(buf, tmp, sizeof(buf));
1095 strlcat(buf, ",", sizeof(buf));
1097 strlcat(buf, ":", sizeof(buf));
1099 strlcat(buf, fp->fp_os.fp_class_nm, sizeof(buf));
1100 strlcat(buf, ":", sizeof(buf));
1101 strlcat(buf, fp->fp_os.fp_version_nm, sizeof(buf));
1102 strlcat(buf, ":", sizeof(buf));
1103 strlcat(buf, fp->fp_os.fp_subtype_nm, sizeof(buf));
1104 strlcat(buf, ":", sizeof(buf));
1106 snprintf(tmp, sizeof(tmp), "TcpOpts %d 0x%llx", fp->fp_optcnt,
1107 (long long int)fp->fp_tcpopts);
1108 strlcat(buf, tmp, sizeof(buf));