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authorBart De Schuymer <bdschuym@pandora.be>2004-11-20 13:05:22 +0000
committerBart De Schuymer <bdschuym@pandora.be>2004-11-20 13:05:22 +0000
commitb78a7e8b9ccbf45414d6df83460126a322c6ea20 (patch)
tree80c8a614e6c543b9ffcb5ec8d1e43eaa09dc232b
parent8bde10155385d8c766eb62f4244ab7b9841f3dff (diff)
add ulog watcher
-rw-r--r--extensions/Makefile2
-rw-r--r--extensions/ebt_ulog.c184
2 files changed, 185 insertions, 1 deletions
diff --git a/extensions/Makefile b/extensions/Makefile
index 21558f4..4323b3b 100644
--- a/extensions/Makefile
+++ b/extensions/Makefile
@@ -1,7 +1,7 @@
#! /usr/bin/make
EXT_FUNC+=802_3 nat arp arpreply ip standard log redirect vlan mark_m mark \
- pkttype stp among limit
+ pkttype stp among limit ulog
EXT_TABLES+=filter nat broute
EXT_OBJS+=$(foreach T,$(EXT_FUNC), extensions/ebt_$(T).o)
EXT_OBJS+=$(foreach T,$(EXT_TABLES), extensions/ebtable_$(T).o)
diff --git a/extensions/ebt_ulog.c b/extensions/ebt_ulog.c
new file mode 100644
index 0000000..4af42e2
--- /dev/null
+++ b/extensions/ebt_ulog.c
@@ -0,0 +1,184 @@
+#define __need_time_t
+#define __need_suseconds_t
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include "../include/ebtables_u.h"
+#include <sys/time.h>
+#include <linux/netfilter_bridge/ebt_ulog.h>
+
+#define CP_NO_LIMIT_S "default_cprange"
+#define CP_NO_LIMIT_N 0
+
+#define ULOG_PREFIX '1'
+#define ULOG_NLGROUP '2'
+#define ULOG_CPRANGE '3'
+#define ULOG_QTHRESHOLD '4'
+#define ULOG_ULOG '5'
+static struct option opts[] =
+{
+ { "ulog-prefix" , required_argument, 0, ULOG_PREFIX },
+ { "ulog-nlgroup" , required_argument, 0, ULOG_NLGROUP },
+ { "ulog-cprange" , required_argument, 0, ULOG_CPRANGE },
+ { "ulog-qthreshold", required_argument, 0, ULOG_QTHRESHOLD },
+ { "ulog" , no_argument , 0, ULOG_ULOG },
+ { 0 }
+};
+
+static void print_help()
+{
+ printf(
+"ulog options:\n"
+"--ulog : use the default ulog parameters\n"
+"--ulog-prefix prefix : max %d characters (default is no prefix)\n"
+"--ulog-nlgroup group : 0 < group number < %d (default = %d)\n"
+"--ulog-cprange range : max copy range (default is " CP_NO_LIMIT_S ")\n"
+"--ulog-qthreshold : 0 < queueing threshold < %d (default = %d)\n",
+ EBT_ULOG_PREFIX_LEN - 1, EBT_ULOG_MAXNLGROUPS + 1,
+ EBT_ULOG_DEFAULT_NLGROUP + 1, EBT_ULOG_MAX_QLEN + 1,
+ EBT_ULOG_DEFAULT_QTHRESHOLD);
+}
+
+static void init(struct ebt_entry_watcher *watcher)
+{
+ struct ebt_ulog_info *uloginfo = (struct ebt_ulog_info *)watcher->data;
+
+ uloginfo->prefix[0] = '\0';
+ uloginfo->nlgroup = EBT_ULOG_DEFAULT_NLGROUP;
+ uloginfo->cprange = CP_NO_LIMIT_N; /* Use default netlink buffer size */
+ uloginfo->qthreshold = EBT_ULOG_DEFAULT_QTHRESHOLD;
+}
+
+#define OPT_PREFIX 0x01
+#define OPT_NLGROUP 0x02
+#define OPT_CPRANGE 0x04
+#define OPT_QTHRESHOLD 0x08
+#define OPT_ULOG 0x10
+static int parse(int c, char **argv, int argc, const struct ebt_u_entry *entry,
+ unsigned int *flags, struct ebt_entry_watcher **watcher)
+{
+ struct ebt_ulog_info *uloginfo;
+ unsigned int i;
+ char *end;
+
+ uloginfo = (struct ebt_ulog_info *)(*watcher)->data;
+ switch (c) {
+ case ULOG_PREFIX:
+ if (ebt_check_inverse(optarg))
+ goto inverse_invalid;
+ ebt_check_option(flags, OPT_PREFIX);
+ if (strlen(optarg) > EBT_ULOG_PREFIX_LEN - 1)
+ ebt_print_error("Prefix too long for ulog-prefix");
+ strcpy(uloginfo->prefix, optarg);
+ break;
+
+ case ULOG_NLGROUP:
+ if (ebt_check_inverse(optarg))
+ goto inverse_invalid;
+ ebt_check_option(flags, OPT_NLGROUP);
+ i = strtoul(optarg, &end, 10);
+ if (*end != '\0')
+ ebt_print_error("Problem with ulog-nlgroup: %s", optarg);
+ if (i < 1 || i > EBT_ULOG_MAXNLGROUPS)
+ ebt_print_error("the ulog-nlgroup number must be "
+ "between 1 and 32");
+ uloginfo->nlgroup = i - 1;
+ break;
+
+ case ULOG_CPRANGE:
+ if (ebt_check_inverse(optarg))
+ goto inverse_invalid;
+ ebt_check_option(flags, OPT_CPRANGE);
+ i = strtoul(optarg, &end, 10);
+ if (*end != '\0') {
+ if (strcasecmp(optarg, CP_NO_LIMIT_S))
+ ebt_print_error("Problem with ulog-cprange: "
+ "%s", optarg);
+ i = CP_NO_LIMIT_N;
+ }
+ uloginfo->cprange = i;
+ break;
+
+ case ULOG_QTHRESHOLD:
+ if (ebt_check_inverse(optarg))
+ goto inverse_invalid;
+ ebt_check_option(flags, OPT_QTHRESHOLD);
+ i = strtoul(optarg, &end, 10);
+ if (*end != '\0')
+ ebt_print_error("Problem with ulog-qthreshold: %s",
+ optarg);
+ if (i > EBT_ULOG_MAX_QLEN)
+ ebt_print_error("ulog-qthreshold argument %d exceeds "
+ "the maximum of %d", i,
+ EBT_ULOG_MAX_QLEN);
+ uloginfo->qthreshold = i;
+ break;
+ case ULOG_ULOG:
+ if (ebt_check_inverse(optarg))
+ goto inverse_invalid;
+ ebt_check_option(flags, OPT_ULOG);
+ break;
+
+ default:
+ return 0;
+ }
+ return 1;
+
+inverse_invalid:
+ ebt_print_error("The use of '!' makes no sense for the ulog watcher");
+ return 0;
+}
+
+static void final_check(const struct ebt_u_entry *entry,
+ const struct ebt_entry_watcher *watcher, const char *name,
+ unsigned int hookmask, unsigned int time)
+{
+ return;
+}
+
+static void print(const struct ebt_u_entry *entry,
+ const struct ebt_entry_watcher *watcher)
+{
+ struct ebt_ulog_info *uloginfo = (struct ebt_ulog_info *)watcher->data;
+
+ printf("--ulog-prefix \"%s\" --ulog-nlgroup %d --ulog-cprange ",
+ uloginfo->prefix, uloginfo->nlgroup + 1);
+ if (uloginfo->cprange == CP_NO_LIMIT_N)
+ printf(CP_NO_LIMIT_S);
+ else
+ printf("%d", uloginfo->cprange);
+ printf(" --ulog-qthreshold %d ", uloginfo->qthreshold);
+}
+
+static int compare(const struct ebt_entry_watcher *w1,
+ const struct ebt_entry_watcher *w2)
+{
+ struct ebt_ulog_info *uloginfo1 = (struct ebt_ulog_info *)w1->data;
+ struct ebt_ulog_info *uloginfo2 = (struct ebt_ulog_info *)w2->data;
+
+ if (uloginfo1->nlgroup != uloginfo2->nlgroup ||
+ uloginfo1->cprange != uloginfo2->cprange ||
+ uloginfo1->qthreshold != uloginfo2->qthreshold ||
+ strcmp(uloginfo1->prefix, uloginfo2->prefix))
+ return 0;
+ return 1;
+}
+
+static struct ebt_u_watcher ulog_watcher =
+{
+ .name = EBT_ULOG_WATCHER,
+ .size = sizeof(struct ebt_ulog_info),
+ .help = print_help,
+ .init = init,
+ .parse = parse,
+ .final_check = final_check,
+ .print = print,
+ .compare = compare,
+ .extra_ops = opts,
+};
+
+void _init(void)
+{
+ ebt_register_watcher(&ulog_watcher);
+}