1*a71a9546SAutomerger Merge Worker /* Shared library add-on to iptables to add ULOG support.
2*a71a9546SAutomerger Merge Worker *
3*a71a9546SAutomerger Merge Worker * (C) 2000 by Harald Welte <[email protected]>
4*a71a9546SAutomerger Merge Worker *
5*a71a9546SAutomerger Merge Worker * multipart netlink support based on ideas by Sebastian Zander
6*a71a9546SAutomerger Merge Worker * <[email protected]>
7*a71a9546SAutomerger Merge Worker *
8*a71a9546SAutomerger Merge Worker * This software is released under the terms of GNU GPL
9*a71a9546SAutomerger Merge Worker *
10*a71a9546SAutomerger Merge Worker * libipt_ULOG.c,v 1.7 2001/01/30 11:55:02 laforge Exp
11*a71a9546SAutomerger Merge Worker */
12*a71a9546SAutomerger Merge Worker #include <stdio.h>
13*a71a9546SAutomerger Merge Worker #include <string.h>
14*a71a9546SAutomerger Merge Worker #include <strings.h>
15*a71a9546SAutomerger Merge Worker #include <xtables.h>
16*a71a9546SAutomerger Merge Worker /* For 64bit kernel / 32bit userspace */
17*a71a9546SAutomerger Merge Worker #include <linux/netfilter_ipv4/ipt_ULOG.h>
18*a71a9546SAutomerger Merge Worker
19*a71a9546SAutomerger Merge Worker enum {
20*a71a9546SAutomerger Merge Worker O_ULOG_NLGROUP = 0,
21*a71a9546SAutomerger Merge Worker O_ULOG_PREFIX,
22*a71a9546SAutomerger Merge Worker O_ULOG_CPRANGE,
23*a71a9546SAutomerger Merge Worker O_ULOG_QTHR,
24*a71a9546SAutomerger Merge Worker };
25*a71a9546SAutomerger Merge Worker
ULOG_help(void)26*a71a9546SAutomerger Merge Worker static void ULOG_help(void)
27*a71a9546SAutomerger Merge Worker {
28*a71a9546SAutomerger Merge Worker printf("ULOG target options:\n"
29*a71a9546SAutomerger Merge Worker " --ulog-nlgroup nlgroup NETLINK group used for logging\n"
30*a71a9546SAutomerger Merge Worker " --ulog-cprange size Bytes of each packet to be passed\n"
31*a71a9546SAutomerger Merge Worker " --ulog-qthreshold Threshold of in-kernel queue\n"
32*a71a9546SAutomerger Merge Worker " --ulog-prefix prefix Prefix log messages with this prefix.\n");
33*a71a9546SAutomerger Merge Worker }
34*a71a9546SAutomerger Merge Worker
35*a71a9546SAutomerger Merge Worker static const struct xt_option_entry ULOG_opts[] = {
36*a71a9546SAutomerger Merge Worker {.name = "ulog-nlgroup", .id = O_ULOG_NLGROUP, .type = XTTYPE_UINT8,
37*a71a9546SAutomerger Merge Worker .min = 1, .max = 32},
38*a71a9546SAutomerger Merge Worker {.name = "ulog-prefix", .id = O_ULOG_PREFIX, .type = XTTYPE_STRING,
39*a71a9546SAutomerger Merge Worker .flags = XTOPT_PUT, XTOPT_POINTER(struct ipt_ulog_info, prefix),
40*a71a9546SAutomerger Merge Worker .min = 1},
41*a71a9546SAutomerger Merge Worker {.name = "ulog-cprange", .id = O_ULOG_CPRANGE, .type = XTTYPE_UINT64},
42*a71a9546SAutomerger Merge Worker {.name = "ulog-qthreshold", .id = O_ULOG_QTHR, .type = XTTYPE_UINT64,
43*a71a9546SAutomerger Merge Worker .min = 1, .max = ULOG_MAX_QLEN},
44*a71a9546SAutomerger Merge Worker XTOPT_TABLEEND,
45*a71a9546SAutomerger Merge Worker };
46*a71a9546SAutomerger Merge Worker
ULOG_init(struct xt_entry_target * t)47*a71a9546SAutomerger Merge Worker static void ULOG_init(struct xt_entry_target *t)
48*a71a9546SAutomerger Merge Worker {
49*a71a9546SAutomerger Merge Worker struct ipt_ulog_info *loginfo = (struct ipt_ulog_info *) t->data;
50*a71a9546SAutomerger Merge Worker
51*a71a9546SAutomerger Merge Worker loginfo->nl_group = ULOG_DEFAULT_NLGROUP;
52*a71a9546SAutomerger Merge Worker loginfo->qthreshold = ULOG_DEFAULT_QTHRESHOLD;
53*a71a9546SAutomerger Merge Worker
54*a71a9546SAutomerger Merge Worker }
55*a71a9546SAutomerger Merge Worker
ULOG_parse(struct xt_option_call * cb)56*a71a9546SAutomerger Merge Worker static void ULOG_parse(struct xt_option_call *cb)
57*a71a9546SAutomerger Merge Worker {
58*a71a9546SAutomerger Merge Worker struct ipt_ulog_info *loginfo = cb->data;
59*a71a9546SAutomerger Merge Worker
60*a71a9546SAutomerger Merge Worker xtables_option_parse(cb);
61*a71a9546SAutomerger Merge Worker switch (cb->entry->id) {
62*a71a9546SAutomerger Merge Worker case O_ULOG_NLGROUP:
63*a71a9546SAutomerger Merge Worker loginfo->nl_group = 1 << (cb->val.u8 - 1);
64*a71a9546SAutomerger Merge Worker break;
65*a71a9546SAutomerger Merge Worker case O_ULOG_PREFIX:
66*a71a9546SAutomerger Merge Worker if (strchr(cb->arg, '\n') != NULL)
67*a71a9546SAutomerger Merge Worker xtables_error(PARAMETER_PROBLEM,
68*a71a9546SAutomerger Merge Worker "Newlines not allowed in --ulog-prefix");
69*a71a9546SAutomerger Merge Worker break;
70*a71a9546SAutomerger Merge Worker case O_ULOG_CPRANGE:
71*a71a9546SAutomerger Merge Worker loginfo->copy_range = cb->val.u64;
72*a71a9546SAutomerger Merge Worker break;
73*a71a9546SAutomerger Merge Worker case O_ULOG_QTHR:
74*a71a9546SAutomerger Merge Worker loginfo->qthreshold = cb->val.u64;
75*a71a9546SAutomerger Merge Worker break;
76*a71a9546SAutomerger Merge Worker }
77*a71a9546SAutomerger Merge Worker }
78*a71a9546SAutomerger Merge Worker
ULOG_save(const void * ip,const struct xt_entry_target * target)79*a71a9546SAutomerger Merge Worker static void ULOG_save(const void *ip, const struct xt_entry_target *target)
80*a71a9546SAutomerger Merge Worker {
81*a71a9546SAutomerger Merge Worker const struct ipt_ulog_info *loginfo
82*a71a9546SAutomerger Merge Worker = (const struct ipt_ulog_info *) target->data;
83*a71a9546SAutomerger Merge Worker
84*a71a9546SAutomerger Merge Worker if (strcmp(loginfo->prefix, "") != 0) {
85*a71a9546SAutomerger Merge Worker fputs(" --ulog-prefix", stdout);
86*a71a9546SAutomerger Merge Worker xtables_save_string(loginfo->prefix);
87*a71a9546SAutomerger Merge Worker }
88*a71a9546SAutomerger Merge Worker
89*a71a9546SAutomerger Merge Worker if (loginfo->nl_group != ULOG_DEFAULT_NLGROUP)
90*a71a9546SAutomerger Merge Worker printf(" --ulog-nlgroup %d", ffs(loginfo->nl_group));
91*a71a9546SAutomerger Merge Worker if (loginfo->copy_range)
92*a71a9546SAutomerger Merge Worker printf(" --ulog-cprange %u", (unsigned int)loginfo->copy_range);
93*a71a9546SAutomerger Merge Worker
94*a71a9546SAutomerger Merge Worker if (loginfo->qthreshold != ULOG_DEFAULT_QTHRESHOLD)
95*a71a9546SAutomerger Merge Worker printf(" --ulog-qthreshold %u", (unsigned int)loginfo->qthreshold);
96*a71a9546SAutomerger Merge Worker }
97*a71a9546SAutomerger Merge Worker
ULOG_print(const void * ip,const struct xt_entry_target * target,int numeric)98*a71a9546SAutomerger Merge Worker static void ULOG_print(const void *ip, const struct xt_entry_target *target,
99*a71a9546SAutomerger Merge Worker int numeric)
100*a71a9546SAutomerger Merge Worker {
101*a71a9546SAutomerger Merge Worker const struct ipt_ulog_info *loginfo
102*a71a9546SAutomerger Merge Worker = (const struct ipt_ulog_info *) target->data;
103*a71a9546SAutomerger Merge Worker
104*a71a9546SAutomerger Merge Worker printf(" ULOG ");
105*a71a9546SAutomerger Merge Worker printf("copy_range %u nlgroup %d", (unsigned int)loginfo->copy_range,
106*a71a9546SAutomerger Merge Worker ffs(loginfo->nl_group));
107*a71a9546SAutomerger Merge Worker if (strcmp(loginfo->prefix, "") != 0)
108*a71a9546SAutomerger Merge Worker printf(" prefix \"%s\"", loginfo->prefix);
109*a71a9546SAutomerger Merge Worker printf(" queue_threshold %u", (unsigned int)loginfo->qthreshold);
110*a71a9546SAutomerger Merge Worker }
111*a71a9546SAutomerger Merge Worker
112*a71a9546SAutomerger Merge Worker static struct xtables_target ulog_tg_reg = {
113*a71a9546SAutomerger Merge Worker .name = "ULOG",
114*a71a9546SAutomerger Merge Worker .version = XTABLES_VERSION,
115*a71a9546SAutomerger Merge Worker .family = NFPROTO_IPV4,
116*a71a9546SAutomerger Merge Worker .size = XT_ALIGN(sizeof(struct ipt_ulog_info)),
117*a71a9546SAutomerger Merge Worker .userspacesize = XT_ALIGN(sizeof(struct ipt_ulog_info)),
118*a71a9546SAutomerger Merge Worker .help = ULOG_help,
119*a71a9546SAutomerger Merge Worker .init = ULOG_init,
120*a71a9546SAutomerger Merge Worker .print = ULOG_print,
121*a71a9546SAutomerger Merge Worker .save = ULOG_save,
122*a71a9546SAutomerger Merge Worker .x6_parse = ULOG_parse,
123*a71a9546SAutomerger Merge Worker .x6_options = ULOG_opts,
124*a71a9546SAutomerger Merge Worker };
125*a71a9546SAutomerger Merge Worker
_init(void)126*a71a9546SAutomerger Merge Worker void _init(void)
127*a71a9546SAutomerger Merge Worker {
128*a71a9546SAutomerger Merge Worker xtables_register_target(&ulog_tg_reg);
129*a71a9546SAutomerger Merge Worker }
130