c9ca2069af832b8cd48b101623f69791367b86be
2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
6 * Permission to use, copy, modify, and/or 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.
26 static int lock_fd
= -1;
27 static pid_t pipe_pid
= -1;
28 static FILE *pipe_fd
= NULL
;
31 warn_elem_section_name(struct uci_section
*s
, bool find_name
)
35 struct uci_element
*tmp
;
39 uci_foreach_element(&s
->package
->sections
, tmp
)
41 if (strcmp(uci_to_section(tmp
)->type
, s
->type
))
50 fprintf(stderr
, "@%s[%d]", s
->type
, i
);
54 uci_foreach_element(&s
->options
, tmp
)
56 o
= uci_to_option(tmp
);
58 if (!strcmp(tmp
->name
, "name") && (o
->type
== UCI_TYPE_STRING
))
60 fprintf(stderr
, " (%s)", o
->v
.string
);
68 fprintf(stderr
, "'%s'", s
->e
.name
);
76 warn_elem(struct uci_element
*e
, const char *format
, ...)
78 if (e
->type
== UCI_TYPE_SECTION
)
80 fprintf(stderr
, "Warning: Section ");
81 warn_elem_section_name(uci_to_section(e
), true);
83 else if (e
->type
== UCI_TYPE_OPTION
)
85 fprintf(stderr
, "Warning: Option ");
86 warn_elem_section_name(uci_to_option(e
)->section
, false);
87 fprintf(stderr
, ".%s ", e
->name
);
91 va_start(argptr
, format
);
92 vfprintf(stderr
, format
, argptr
);
95 fprintf(stderr
, "\n");
99 warn(const char* format
, ...)
101 fprintf(stderr
, "Warning: ");
103 va_start(argptr
, format
);
104 vfprintf(stderr
, format
, argptr
);
106 fprintf(stderr
, "\n");
110 error(const char* format
, ...)
112 fprintf(stderr
, "Error: ");
114 va_start(argptr
, format
);
115 vfprintf(stderr
, format
, argptr
);
117 fprintf(stderr
, "\n");
123 info(const char* format
, ...)
126 va_start(argptr
, format
);
127 vfprintf(stderr
, format
, argptr
);
129 fprintf(stderr
, "\n");
133 fw3_find_command(const char *cmd
)
136 int plen
= 0, clen
= strlen(cmd
) + 1;
138 static char path
[PATH_MAX
];
140 if (!stat(cmd
, &s
) && S_ISREG(s
.st_mode
))
143 search
= getenv("PATH");
146 search
= "/bin:/usr/bin:/sbin:/usr/sbin";
152 if (*p
!= ':' && *p
!= '\0')
157 if ((plen
+ clen
) >= sizeof(path
))
160 strncpy(path
, search
, plen
);
161 sprintf(path
+ plen
, "/%s", cmd
);
163 if (!stat(path
, &s
) && S_ISREG(s
.st_mode
))
174 fw3_stdout_pipe(void)
181 __fw3_command_pipe(bool silent
, const char *command
, ...)
187 char *arg
, **args
, **tmp
;
189 command
= fw3_find_command(command
);
198 args
= malloc(argn
* sizeof(arg
));
203 args
[0] = (char *)command
;
206 va_start(argp
, command
);
208 while ((arg
= va_arg(argp
, char *)) != NULL
)
210 tmp
= realloc(args
, ++argn
* sizeof(arg
));
222 switch ((pid
= fork()))
238 execv(command
, args
);
241 signal(SIGPIPE
, SIG_IGN
);
246 pipe_fd
= fdopen(pfds
[1], "w");
251 fw3_pr(const char *fmt
, ...)
255 vfprintf(pipe_fd
, fmt
, args
);
260 fw3_command_close(void)
262 if (pipe_fd
&& pipe_fd
!= stdout
)
266 waitpid(pipe_pid
, NULL
, 0);
268 signal(SIGPIPE
, SIG_DFL
);
275 fw3_has_table(bool ipv6
, const char *table
)
282 const char *path
= ipv6
283 ? "/proc/net/ip6_tables_names" : "/proc/net/ip_tables_names";
285 if (!(f
= fopen(path
, "r")))
288 while (fgets(line
, sizeof(line
), f
))
290 if (!strncmp(line
, table
, strlen(table
)))
306 lock_fd
= open(FW3_LOCKFILE
, O_CREAT
|O_WRONLY
, S_IRUSR
|S_IWUSR
);
310 warn("Cannot create lock file %s: %s", FW3_LOCKFILE
, strerror(errno
));
314 if (flock(lock_fd
, LOCK_EX
))
316 warn("Cannot acquire exclusive lock: %s", strerror(errno
));
329 if (flock(lock_fd
, LOCK_UN
))
330 warn("Cannot release exclusive lock: %s", strerror(errno
));
333 unlink(FW3_LOCKFILE
);
340 fw3_read_statefile(void *state
)
346 const char *p
, *name
;
350 struct fw3_state
*s
= state
;
351 struct fw3_zone
*zone
;
352 struct fw3_ipset
*ipset
;
354 sf
= fopen(FW3_STATEFILE
, "r");
359 while (fgets(line
, sizeof(line
), sf
))
361 p
= strtok(line
, " \t\n");
366 type
= strtoul(p
, NULL
, 10);
367 name
= strtok(NULL
, " \t\n");
372 for (n
= 0, p
= strtok(NULL
, " \t\n");
373 n
< ARRAY_SIZE(flags
) && p
!= NULL
;
374 n
++, p
= strtok(NULL
, " \t\n"))
376 flags
[n
] = strtoul(p
, NULL
, 10);
381 case FW3_TYPE_DEFAULTS
:
382 s
->running_defaults
.flags
= flags
[0];
386 if (!(zone
= fw3_lookup_zone(state
, name
, false)))
388 zone
= fw3_alloc_zone();
393 zone
->name
= strdup(name
);
394 list_add_tail(&zone
->list
, &s
->zones
);
397 zone
->src_flags
= flags
[0];
398 zone
->dst_flags
= flags
[1];
399 list_add_tail(&zone
->running_list
, &s
->running_zones
);
403 if (!(ipset
= fw3_lookup_ipset(state
, name
, false)))
405 ipset
= fw3_alloc_ipset();
410 ipset
->name
= strdup(name
);
411 list_add_tail(&ipset
->list
, &s
->ipsets
);
414 ipset
->flags
= flags
[0];
415 list_add_tail(&ipset
->running_list
, &s
->running_ipsets
);
426 fw3_write_statefile(void *state
)
429 struct fw3_state
*s
= state
;
430 struct fw3_defaults
*d
= &s
->defaults
;
434 int mask
= (1 << FW3_FAMILY_V4
) | (1 << FW3_FAMILY_V6
);
436 if (!(d
->flags
& mask
))
438 if (unlink(FW3_STATEFILE
))
439 warn("Unable to remove state %s: %s",
440 FW3_STATEFILE
, strerror(errno
));
445 sf
= fopen(FW3_STATEFILE
, "w");
449 warn("Cannot create state %s: %s", FW3_STATEFILE
, strerror(errno
));
453 fprintf(sf
, "%u - %u\n", FW3_TYPE_DEFAULTS
, d
->flags
);
455 list_for_each_entry(z
, &s
->running_zones
, running_list
)
457 fprintf(sf
, "%u %s %u %u\n", FW3_TYPE_ZONE
,
458 z
->name
, z
->src_flags
, z
->dst_flags
);
461 list_for_each_entry(i
, &s
->running_ipsets
, running_list
)
463 fprintf(sf
, "%u %s %u\n", FW3_TYPE_IPSET
, i
->name
, i
->flags
);
470 struct object_list_heads
472 struct list_head list
;
473 struct list_head running_list
;
477 fw3_set_running(void *object
, struct list_head
*dest
)
479 struct object_list_heads
*o
= object
;
481 if (dest
&& !o
->running_list
.next
)
482 list_add_tail(&o
->running_list
, dest
);
483 else if (!dest
&& o
->running_list
.next
)
484 list_del(&o
->running_list
);