1*a71a9546SAutomerger Merge Worker #include <stdio.h>
2*a71a9546SAutomerger Merge Worker #include <xtables.h>
3*a71a9546SAutomerger Merge Worker #include <linux/netfilter/xt_esp.h>
4*a71a9546SAutomerger Merge Worker
5*a71a9546SAutomerger Merge Worker enum {
6*a71a9546SAutomerger Merge Worker O_ESPSPI = 0,
7*a71a9546SAutomerger Merge Worker };
8*a71a9546SAutomerger Merge Worker
esp_help(void)9*a71a9546SAutomerger Merge Worker static void esp_help(void)
10*a71a9546SAutomerger Merge Worker {
11*a71a9546SAutomerger Merge Worker printf(
12*a71a9546SAutomerger Merge Worker "esp match options:\n"
13*a71a9546SAutomerger Merge Worker "[!] --espspi 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 esp_opts[] = {
18*a71a9546SAutomerger Merge Worker {.name = "espspi", .id = O_ESPSPI, .type = XTTYPE_UINT32RC,
19*a71a9546SAutomerger Merge Worker .flags = XTOPT_INVERT | XTOPT_PUT,
20*a71a9546SAutomerger Merge Worker XTOPT_POINTER(struct xt_esp, spis)},
21*a71a9546SAutomerger Merge Worker XTOPT_TABLEEND,
22*a71a9546SAutomerger Merge Worker };
23*a71a9546SAutomerger Merge Worker
esp_init(struct xt_entry_match * m)24*a71a9546SAutomerger Merge Worker static void esp_init(struct xt_entry_match *m)
25*a71a9546SAutomerger Merge Worker {
26*a71a9546SAutomerger Merge Worker struct xt_esp *espinfo = (void *)m->data;
27*a71a9546SAutomerger Merge Worker
28*a71a9546SAutomerger Merge Worker espinfo->spis[1] = ~0U;
29*a71a9546SAutomerger Merge Worker }
30*a71a9546SAutomerger Merge Worker
esp_parse(struct xt_option_call * cb)31*a71a9546SAutomerger Merge Worker static void esp_parse(struct xt_option_call *cb)
32*a71a9546SAutomerger Merge Worker {
33*a71a9546SAutomerger Merge Worker struct xt_esp *espinfo = 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 espinfo->spis[1] = espinfo->spis[0];
38*a71a9546SAutomerger Merge Worker if (cb->invert)
39*a71a9546SAutomerger Merge Worker espinfo->invflags |= XT_ESP_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 if (min == max)
50*a71a9546SAutomerger Merge Worker printf(" %s:%s%u", name, inv, min);
51*a71a9546SAutomerger Merge Worker else
52*a71a9546SAutomerger Merge Worker printf(" %ss:%s%u:%u", name, inv, min, max);
53*a71a9546SAutomerger Merge Worker }
54*a71a9546SAutomerger Merge Worker }
55*a71a9546SAutomerger Merge Worker
56*a71a9546SAutomerger Merge Worker static void
esp_print(const void * ip,const struct xt_entry_match * match,int numeric)57*a71a9546SAutomerger Merge Worker esp_print(const void *ip, const struct xt_entry_match *match, int numeric)
58*a71a9546SAutomerger Merge Worker {
59*a71a9546SAutomerger Merge Worker const struct xt_esp *esp = (struct xt_esp *)match->data;
60*a71a9546SAutomerger Merge Worker
61*a71a9546SAutomerger Merge Worker printf(" esp");
62*a71a9546SAutomerger Merge Worker print_spis("spi", esp->spis[0], esp->spis[1],
63*a71a9546SAutomerger Merge Worker esp->invflags & XT_ESP_INV_SPI);
64*a71a9546SAutomerger Merge Worker if (esp->invflags & ~XT_ESP_INV_MASK)
65*a71a9546SAutomerger Merge Worker printf(" Unknown invflags: 0x%X",
66*a71a9546SAutomerger Merge Worker esp->invflags & ~XT_ESP_INV_MASK);
67*a71a9546SAutomerger Merge Worker }
68*a71a9546SAutomerger Merge Worker
esp_save(const void * ip,const struct xt_entry_match * match)69*a71a9546SAutomerger Merge Worker static void esp_save(const void *ip, const struct xt_entry_match *match)
70*a71a9546SAutomerger Merge Worker {
71*a71a9546SAutomerger Merge Worker const struct xt_esp *espinfo = (struct xt_esp *)match->data;
72*a71a9546SAutomerger Merge Worker
73*a71a9546SAutomerger Merge Worker if (!(espinfo->spis[0] == 0
74*a71a9546SAutomerger Merge Worker && espinfo->spis[1] == 0xFFFFFFFF)) {
75*a71a9546SAutomerger Merge Worker printf("%s --espspi ",
76*a71a9546SAutomerger Merge Worker (espinfo->invflags & XT_ESP_INV_SPI) ? " !" : "");
77*a71a9546SAutomerger Merge Worker if (espinfo->spis[0]
78*a71a9546SAutomerger Merge Worker != espinfo->spis[1])
79*a71a9546SAutomerger Merge Worker printf("%u:%u",
80*a71a9546SAutomerger Merge Worker espinfo->spis[0],
81*a71a9546SAutomerger Merge Worker espinfo->spis[1]);
82*a71a9546SAutomerger Merge Worker else
83*a71a9546SAutomerger Merge Worker printf("%u",
84*a71a9546SAutomerger Merge Worker espinfo->spis[0]);
85*a71a9546SAutomerger Merge Worker }
86*a71a9546SAutomerger Merge Worker
87*a71a9546SAutomerger Merge Worker }
88*a71a9546SAutomerger Merge Worker
esp_xlate(struct xt_xlate * xl,const struct xt_xlate_mt_params * params)89*a71a9546SAutomerger Merge Worker static int esp_xlate(struct xt_xlate *xl,
90*a71a9546SAutomerger Merge Worker const struct xt_xlate_mt_params *params)
91*a71a9546SAutomerger Merge Worker {
92*a71a9546SAutomerger Merge Worker const struct xt_esp *espinfo = (struct xt_esp *)params->match->data;
93*a71a9546SAutomerger Merge Worker
94*a71a9546SAutomerger Merge Worker if (!(espinfo->spis[0] == 0 && espinfo->spis[1] == 0xFFFFFFFF)) {
95*a71a9546SAutomerger Merge Worker xt_xlate_add(xl, "esp spi%s",
96*a71a9546SAutomerger Merge Worker (espinfo->invflags & XT_ESP_INV_SPI) ? " !=" : "");
97*a71a9546SAutomerger Merge Worker if (espinfo->spis[0] != espinfo->spis[1])
98*a71a9546SAutomerger Merge Worker xt_xlate_add(xl, " %u-%u", espinfo->spis[0],
99*a71a9546SAutomerger Merge Worker espinfo->spis[1]);
100*a71a9546SAutomerger Merge Worker else
101*a71a9546SAutomerger Merge Worker xt_xlate_add(xl, " %u", espinfo->spis[0]);
102*a71a9546SAutomerger Merge Worker }
103*a71a9546SAutomerger Merge Worker
104*a71a9546SAutomerger Merge Worker return 1;
105*a71a9546SAutomerger Merge Worker }
106*a71a9546SAutomerger Merge Worker
107*a71a9546SAutomerger Merge Worker static struct xtables_match esp_match = {
108*a71a9546SAutomerger Merge Worker .family = NFPROTO_UNSPEC,
109*a71a9546SAutomerger Merge Worker .name = "esp",
110*a71a9546SAutomerger Merge Worker .version = XTABLES_VERSION,
111*a71a9546SAutomerger Merge Worker .size = XT_ALIGN(sizeof(struct xt_esp)),
112*a71a9546SAutomerger Merge Worker .userspacesize = XT_ALIGN(sizeof(struct xt_esp)),
113*a71a9546SAutomerger Merge Worker .help = esp_help,
114*a71a9546SAutomerger Merge Worker .init = esp_init,
115*a71a9546SAutomerger Merge Worker .print = esp_print,
116*a71a9546SAutomerger Merge Worker .save = esp_save,
117*a71a9546SAutomerger Merge Worker .x6_parse = esp_parse,
118*a71a9546SAutomerger Merge Worker .x6_options = esp_opts,
119*a71a9546SAutomerger Merge Worker .xlate = esp_xlate,
120*a71a9546SAutomerger Merge Worker };
121*a71a9546SAutomerger Merge Worker
122*a71a9546SAutomerger Merge Worker void
_init(void)123*a71a9546SAutomerger Merge Worker _init(void)
124*a71a9546SAutomerger Merge Worker {
125*a71a9546SAutomerger Merge Worker xtables_register_match(&esp_match);
126*a71a9546SAutomerger Merge Worker }
127