1*a71a9546SAutomerger Merge Worker /* 802_3
2*a71a9546SAutomerger Merge Worker *
3*a71a9546SAutomerger Merge Worker * Author:
4*a71a9546SAutomerger Merge Worker * Chris Vitale <[email protected]>
5*a71a9546SAutomerger Merge Worker *
6*a71a9546SAutomerger Merge Worker * May 2003
7*a71a9546SAutomerger Merge Worker *
8*a71a9546SAutomerger Merge Worker * Adapted by Arturo Borrero Gonzalez <[email protected]>
9*a71a9546SAutomerger Merge Worker * to use libxtables for ebtables-compat
10*a71a9546SAutomerger Merge Worker */
11*a71a9546SAutomerger Merge Worker
12*a71a9546SAutomerger Merge Worker #include <stdbool.h>
13*a71a9546SAutomerger Merge Worker #include <stdio.h>
14*a71a9546SAutomerger Merge Worker #include <string.h>
15*a71a9546SAutomerger Merge Worker #include <stdlib.h>
16*a71a9546SAutomerger Merge Worker #include <getopt.h>
17*a71a9546SAutomerger Merge Worker #include <xtables.h>
18*a71a9546SAutomerger Merge Worker #include <linux/netfilter_bridge/ebt_802_3.h>
19*a71a9546SAutomerger Merge Worker
20*a71a9546SAutomerger Merge Worker #define _802_3_SAP '1'
21*a71a9546SAutomerger Merge Worker #define _802_3_TYPE '2'
22*a71a9546SAutomerger Merge Worker
23*a71a9546SAutomerger Merge Worker static const struct option br802_3_opts[] = {
24*a71a9546SAutomerger Merge Worker { .name = "802_3-sap", .has_arg = true, .val = _802_3_SAP },
25*a71a9546SAutomerger Merge Worker { .name = "802_3-type", .has_arg = true, .val = _802_3_TYPE },
26*a71a9546SAutomerger Merge Worker XT_GETOPT_TABLEEND,
27*a71a9546SAutomerger Merge Worker };
28*a71a9546SAutomerger Merge Worker
br802_3_print_help(void)29*a71a9546SAutomerger Merge Worker static void br802_3_print_help(void)
30*a71a9546SAutomerger Merge Worker {
31*a71a9546SAutomerger Merge Worker printf(
32*a71a9546SAutomerger Merge Worker "802_3 options:\n"
33*a71a9546SAutomerger Merge Worker "--802_3-sap [!] protocol : 802.3 DSAP/SSAP- 1 byte value (hex)\n"
34*a71a9546SAutomerger Merge Worker " DSAP and SSAP are always the same. One SAP applies to both fields\n"
35*a71a9546SAutomerger Merge Worker "--802_3-type [!] protocol : 802.3 SNAP Type- 2 byte value (hex)\n"
36*a71a9546SAutomerger Merge Worker " Type implies SAP value 0xaa\n");
37*a71a9546SAutomerger Merge Worker }
38*a71a9546SAutomerger Merge Worker
br802_3_init(struct xt_entry_match * match)39*a71a9546SAutomerger Merge Worker static void br802_3_init(struct xt_entry_match *match)
40*a71a9546SAutomerger Merge Worker {
41*a71a9546SAutomerger Merge Worker struct ebt_802_3_info *info = (struct ebt_802_3_info *)match->data;
42*a71a9546SAutomerger Merge Worker
43*a71a9546SAutomerger Merge Worker info->invflags = 0;
44*a71a9546SAutomerger Merge Worker info->bitmask = 0;
45*a71a9546SAutomerger Merge Worker }
46*a71a9546SAutomerger Merge Worker
47*a71a9546SAutomerger Merge Worker static int
br802_3_parse(int c,char ** argv,int invert,unsigned int * flags,const void * entry,struct xt_entry_match ** match)48*a71a9546SAutomerger Merge Worker br802_3_parse(int c, char **argv, int invert, unsigned int *flags,
49*a71a9546SAutomerger Merge Worker const void *entry, struct xt_entry_match **match)
50*a71a9546SAutomerger Merge Worker {
51*a71a9546SAutomerger Merge Worker struct ebt_802_3_info *info = (struct ebt_802_3_info *) (*match)->data;
52*a71a9546SAutomerger Merge Worker unsigned int i;
53*a71a9546SAutomerger Merge Worker char *end;
54*a71a9546SAutomerger Merge Worker
55*a71a9546SAutomerger Merge Worker switch (c) {
56*a71a9546SAutomerger Merge Worker case _802_3_SAP:
57*a71a9546SAutomerger Merge Worker if (invert)
58*a71a9546SAutomerger Merge Worker info->invflags |= EBT_802_3_SAP;
59*a71a9546SAutomerger Merge Worker i = strtoul(optarg, &end, 16);
60*a71a9546SAutomerger Merge Worker if (i > 255 || *end != '\0')
61*a71a9546SAutomerger Merge Worker xtables_error(PARAMETER_PROBLEM,
62*a71a9546SAutomerger Merge Worker "Problem with specified "
63*a71a9546SAutomerger Merge Worker "sap hex value, %x",i);
64*a71a9546SAutomerger Merge Worker info->sap = i; /* one byte, so no byte order worries */
65*a71a9546SAutomerger Merge Worker info->bitmask |= EBT_802_3_SAP;
66*a71a9546SAutomerger Merge Worker break;
67*a71a9546SAutomerger Merge Worker case _802_3_TYPE:
68*a71a9546SAutomerger Merge Worker if (invert)
69*a71a9546SAutomerger Merge Worker info->invflags |= EBT_802_3_TYPE;
70*a71a9546SAutomerger Merge Worker i = strtoul(optarg, &end, 16);
71*a71a9546SAutomerger Merge Worker if (i > 65535 || *end != '\0') {
72*a71a9546SAutomerger Merge Worker xtables_error(PARAMETER_PROBLEM,
73*a71a9546SAutomerger Merge Worker "Problem with the specified "
74*a71a9546SAutomerger Merge Worker "type hex value, %x",i);
75*a71a9546SAutomerger Merge Worker }
76*a71a9546SAutomerger Merge Worker info->type = htons(i);
77*a71a9546SAutomerger Merge Worker info->bitmask |= EBT_802_3_TYPE;
78*a71a9546SAutomerger Merge Worker break;
79*a71a9546SAutomerger Merge Worker default:
80*a71a9546SAutomerger Merge Worker return 0;
81*a71a9546SAutomerger Merge Worker }
82*a71a9546SAutomerger Merge Worker
83*a71a9546SAutomerger Merge Worker *flags |= info->bitmask;
84*a71a9546SAutomerger Merge Worker return 1;
85*a71a9546SAutomerger Merge Worker }
86*a71a9546SAutomerger Merge Worker
87*a71a9546SAutomerger Merge Worker static void
br802_3_final_check(unsigned int flags)88*a71a9546SAutomerger Merge Worker br802_3_final_check(unsigned int flags)
89*a71a9546SAutomerger Merge Worker {
90*a71a9546SAutomerger Merge Worker if (!flags)
91*a71a9546SAutomerger Merge Worker xtables_error(PARAMETER_PROBLEM,
92*a71a9546SAutomerger Merge Worker "You must specify proper arguments");
93*a71a9546SAutomerger Merge Worker }
94*a71a9546SAutomerger Merge Worker
br802_3_print(const void * ip,const struct xt_entry_match * match,int numeric)95*a71a9546SAutomerger Merge Worker static void br802_3_print(const void *ip, const struct xt_entry_match *match,
96*a71a9546SAutomerger Merge Worker int numeric)
97*a71a9546SAutomerger Merge Worker {
98*a71a9546SAutomerger Merge Worker struct ebt_802_3_info *info = (struct ebt_802_3_info *)match->data;
99*a71a9546SAutomerger Merge Worker
100*a71a9546SAutomerger Merge Worker if (info->bitmask & EBT_802_3_SAP) {
101*a71a9546SAutomerger Merge Worker printf("--802_3-sap ");
102*a71a9546SAutomerger Merge Worker if (info->invflags & EBT_802_3_SAP)
103*a71a9546SAutomerger Merge Worker printf("! ");
104*a71a9546SAutomerger Merge Worker printf("0x%.2x ", info->sap);
105*a71a9546SAutomerger Merge Worker }
106*a71a9546SAutomerger Merge Worker if (info->bitmask & EBT_802_3_TYPE) {
107*a71a9546SAutomerger Merge Worker printf("--802_3-type ");
108*a71a9546SAutomerger Merge Worker if (info->invflags & EBT_802_3_TYPE)
109*a71a9546SAutomerger Merge Worker printf("! ");
110*a71a9546SAutomerger Merge Worker printf("0x%.4x ", ntohs(info->type));
111*a71a9546SAutomerger Merge Worker }
112*a71a9546SAutomerger Merge Worker }
113*a71a9546SAutomerger Merge Worker
114*a71a9546SAutomerger Merge Worker static struct xtables_match br802_3_match =
115*a71a9546SAutomerger Merge Worker {
116*a71a9546SAutomerger Merge Worker .name = "802_3",
117*a71a9546SAutomerger Merge Worker .revision = 0,
118*a71a9546SAutomerger Merge Worker .version = XTABLES_VERSION,
119*a71a9546SAutomerger Merge Worker .family = NFPROTO_BRIDGE,
120*a71a9546SAutomerger Merge Worker .size = XT_ALIGN(sizeof(struct ebt_802_3_info)),
121*a71a9546SAutomerger Merge Worker .userspacesize = XT_ALIGN(sizeof(struct ebt_802_3_info)),
122*a71a9546SAutomerger Merge Worker .init = br802_3_init,
123*a71a9546SAutomerger Merge Worker .help = br802_3_print_help,
124*a71a9546SAutomerger Merge Worker .parse = br802_3_parse,
125*a71a9546SAutomerger Merge Worker .final_check = br802_3_final_check,
126*a71a9546SAutomerger Merge Worker .print = br802_3_print,
127*a71a9546SAutomerger Merge Worker .extra_opts = br802_3_opts,
128*a71a9546SAutomerger Merge Worker };
129*a71a9546SAutomerger Merge Worker
_init(void)130*a71a9546SAutomerger Merge Worker void _init(void)
131*a71a9546SAutomerger Merge Worker {
132*a71a9546SAutomerger Merge Worker xtables_register_match(&br802_3_match);
133*a71a9546SAutomerger Merge Worker }
134