1*a71a9546SAutomerger Merge Worker #include <stdio.h>
2*a71a9546SAutomerger Merge Worker #include <xtables.h>
3*a71a9546SAutomerger Merge Worker #include <linux/netfilter_ipv4/ipt_ah.h>
4*a71a9546SAutomerger Merge Worker
5*a71a9546SAutomerger Merge Worker enum {
6*a71a9546SAutomerger Merge Worker O_AHSPI = 0,
7*a71a9546SAutomerger Merge Worker };
8*a71a9546SAutomerger Merge Worker
ah_help(void)9*a71a9546SAutomerger Merge Worker static void ah_help(void)
10*a71a9546SAutomerger Merge Worker {
11*a71a9546SAutomerger Merge Worker printf(
12*a71a9546SAutomerger Merge Worker "ah match options:\n"
13*a71a9546SAutomerger Merge Worker "[!] --ahspi spi[:spi]\n"
14*a71a9546SAutomerger Merge Worker " match spi (range)\n");
15*a71a9546SAutomerger Merge Worker }
16*a71a9546SAutomerger Merge Worker
17*a71a9546SAutomerger Merge Worker static const struct xt_option_entry ah_opts[] = {
18*a71a9546SAutomerger Merge Worker {.name = "ahspi", .id = O_AHSPI, .type = XTTYPE_UINT32RC,
19*a71a9546SAutomerger Merge Worker .flags = XTOPT_INVERT | XTOPT_PUT,
20*a71a9546SAutomerger Merge Worker XTOPT_POINTER(struct ipt_ah, spis)},
21*a71a9546SAutomerger Merge Worker XTOPT_TABLEEND,
22*a71a9546SAutomerger Merge Worker };
23*a71a9546SAutomerger Merge Worker
ah_init(struct xt_entry_match * m)24*a71a9546SAutomerger Merge Worker static void ah_init(struct xt_entry_match *m)
25*a71a9546SAutomerger Merge Worker {
26*a71a9546SAutomerger Merge Worker struct ipt_ah *ahinfo = (void *)m->data;
27*a71a9546SAutomerger Merge Worker
28*a71a9546SAutomerger Merge Worker ahinfo->spis[1] = ~0U;
29*a71a9546SAutomerger Merge Worker }
30*a71a9546SAutomerger Merge Worker
ah_parse(struct xt_option_call * cb)31*a71a9546SAutomerger Merge Worker static void ah_parse(struct xt_option_call *cb)
32*a71a9546SAutomerger Merge Worker {
33*a71a9546SAutomerger Merge Worker struct ipt_ah *ahinfo = cb->data;
34*a71a9546SAutomerger Merge Worker
35*a71a9546SAutomerger Merge Worker xtables_option_parse(cb);
36*a71a9546SAutomerger Merge Worker if (cb->nvals == 1)
37*a71a9546SAutomerger Merge Worker ahinfo->spis[1] = ahinfo->spis[0];
38*a71a9546SAutomerger Merge Worker if (cb->invert)
39*a71a9546SAutomerger Merge Worker ahinfo->invflags |= IPT_AH_INV_SPI;
40*a71a9546SAutomerger Merge Worker }
41*a71a9546SAutomerger Merge Worker
42*a71a9546SAutomerger Merge Worker static void
print_spis(const char * name,uint32_t min,uint32_t max,int invert)43*a71a9546SAutomerger Merge Worker print_spis(const char *name, uint32_t min, uint32_t max,
44*a71a9546SAutomerger Merge Worker int invert)
45*a71a9546SAutomerger Merge Worker {
46*a71a9546SAutomerger Merge Worker const char *inv = invert ? "!" : "";
47*a71a9546SAutomerger Merge Worker
48*a71a9546SAutomerger Merge Worker if (min != 0 || max != 0xFFFFFFFF || invert) {
49*a71a9546SAutomerger Merge Worker printf("%s", name);
50*a71a9546SAutomerger Merge Worker if (min == max) {
51*a71a9546SAutomerger Merge Worker printf(":%s", inv);
52*a71a9546SAutomerger Merge Worker printf("%u", min);
53*a71a9546SAutomerger Merge Worker } else {
54*a71a9546SAutomerger Merge Worker printf("s:%s", inv);
55*a71a9546SAutomerger Merge Worker printf("%u",min);
56*a71a9546SAutomerger Merge Worker printf(":");
57*a71a9546SAutomerger Merge Worker printf("%u",max);
58*a71a9546SAutomerger Merge Worker }
59*a71a9546SAutomerger Merge Worker }
60*a71a9546SAutomerger Merge Worker }
61*a71a9546SAutomerger Merge Worker
ah_print(const void * ip,const struct xt_entry_match * match,int numeric)62*a71a9546SAutomerger Merge Worker static void ah_print(const void *ip, const struct xt_entry_match *match,
63*a71a9546SAutomerger Merge Worker int numeric)
64*a71a9546SAutomerger Merge Worker {
65*a71a9546SAutomerger Merge Worker const struct ipt_ah *ah = (struct ipt_ah *)match->data;
66*a71a9546SAutomerger Merge Worker
67*a71a9546SAutomerger Merge Worker printf(" ah ");
68*a71a9546SAutomerger Merge Worker print_spis("spi", ah->spis[0], ah->spis[1],
69*a71a9546SAutomerger Merge Worker ah->invflags & IPT_AH_INV_SPI);
70*a71a9546SAutomerger Merge Worker if (ah->invflags & ~IPT_AH_INV_MASK)
71*a71a9546SAutomerger Merge Worker printf(" Unknown invflags: 0x%X",
72*a71a9546SAutomerger Merge Worker ah->invflags & ~IPT_AH_INV_MASK);
73*a71a9546SAutomerger Merge Worker }
74*a71a9546SAutomerger Merge Worker
ah_save(const void * ip,const struct xt_entry_match * match)75*a71a9546SAutomerger Merge Worker static void ah_save(const void *ip, const struct xt_entry_match *match)
76*a71a9546SAutomerger Merge Worker {
77*a71a9546SAutomerger Merge Worker const struct ipt_ah *ahinfo = (struct ipt_ah *)match->data;
78*a71a9546SAutomerger Merge Worker
79*a71a9546SAutomerger Merge Worker if (!(ahinfo->spis[0] == 0
80*a71a9546SAutomerger Merge Worker && ahinfo->spis[1] == 0xFFFFFFFF)) {
81*a71a9546SAutomerger Merge Worker printf("%s --ahspi ",
82*a71a9546SAutomerger Merge Worker (ahinfo->invflags & IPT_AH_INV_SPI) ? " !" : "");
83*a71a9546SAutomerger Merge Worker if (ahinfo->spis[0]
84*a71a9546SAutomerger Merge Worker != ahinfo->spis[1])
85*a71a9546SAutomerger Merge Worker printf("%u:%u",
86*a71a9546SAutomerger Merge Worker ahinfo->spis[0],
87*a71a9546SAutomerger Merge Worker ahinfo->spis[1]);
88*a71a9546SAutomerger Merge Worker else
89*a71a9546SAutomerger Merge Worker printf("%u",
90*a71a9546SAutomerger Merge Worker ahinfo->spis[0]);
91*a71a9546SAutomerger Merge Worker }
92*a71a9546SAutomerger Merge Worker
93*a71a9546SAutomerger Merge Worker }
94*a71a9546SAutomerger Merge Worker
ah_xlate(struct xt_xlate * xl,const struct xt_xlate_mt_params * params)95*a71a9546SAutomerger Merge Worker static int ah_xlate(struct xt_xlate *xl,
96*a71a9546SAutomerger Merge Worker const struct xt_xlate_mt_params *params)
97*a71a9546SAutomerger Merge Worker {
98*a71a9546SAutomerger Merge Worker const struct ipt_ah *ahinfo = (struct ipt_ah *)params->match->data;
99*a71a9546SAutomerger Merge Worker
100*a71a9546SAutomerger Merge Worker if (!(ahinfo->spis[0] == 0 && ahinfo->spis[1] == 0xFFFFFFFF)) {
101*a71a9546SAutomerger Merge Worker xt_xlate_add(xl, "ah spi%s ",
102*a71a9546SAutomerger Merge Worker (ahinfo->invflags & IPT_AH_INV_SPI) ? " !=" : "");
103*a71a9546SAutomerger Merge Worker if (ahinfo->spis[0] != ahinfo->spis[1])
104*a71a9546SAutomerger Merge Worker xt_xlate_add(xl, "%u-%u", ahinfo->spis[0],
105*a71a9546SAutomerger Merge Worker ahinfo->spis[1]);
106*a71a9546SAutomerger Merge Worker else
107*a71a9546SAutomerger Merge Worker xt_xlate_add(xl, "%u", ahinfo->spis[0]);
108*a71a9546SAutomerger Merge Worker }
109*a71a9546SAutomerger Merge Worker
110*a71a9546SAutomerger Merge Worker return 1;
111*a71a9546SAutomerger Merge Worker }
112*a71a9546SAutomerger Merge Worker
113*a71a9546SAutomerger Merge Worker static struct xtables_match ah_mt_reg = {
114*a71a9546SAutomerger Merge Worker .name = "ah",
115*a71a9546SAutomerger Merge Worker .version = XTABLES_VERSION,
116*a71a9546SAutomerger Merge Worker .family = NFPROTO_IPV4,
117*a71a9546SAutomerger Merge Worker .size = XT_ALIGN(sizeof(struct ipt_ah)),
118*a71a9546SAutomerger Merge Worker .userspacesize = XT_ALIGN(sizeof(struct ipt_ah)),
119*a71a9546SAutomerger Merge Worker .help = ah_help,
120*a71a9546SAutomerger Merge Worker .init = ah_init,
121*a71a9546SAutomerger Merge Worker .print = ah_print,
122*a71a9546SAutomerger Merge Worker .save = ah_save,
123*a71a9546SAutomerger Merge Worker .x6_parse = ah_parse,
124*a71a9546SAutomerger Merge Worker .x6_options = ah_opts,
125*a71a9546SAutomerger Merge Worker .xlate = ah_xlate,
126*a71a9546SAutomerger Merge Worker };
127*a71a9546SAutomerger Merge Worker
128*a71a9546SAutomerger Merge Worker void
_init(void)129*a71a9546SAutomerger Merge Worker _init(void)
130*a71a9546SAutomerger Merge Worker {
131*a71a9546SAutomerger Merge Worker xtables_register_match(&ah_mt_reg);
132*a71a9546SAutomerger Merge Worker }
133