1 /* Shared library add-on to iptables to add CLASSIFY target support. */
8 #include <linux/netfilter_ipv4/ip_tables.h>
9 #include <linux/netfilter_ipv4/ipt_CLASSIFY.h>
10 #include <linux/types.h>
11 #include <linux/pkt_sched.h>
13 /* Function which prints out usage message. */
18 "CLASSIFY target v%s options:\n"
19 " --set-class [MAJOR:MINOR] Set skb->priority value\n"
24 static struct option opts
[] = {
25 { "set-class", 1, 0, '1' },
29 /* Initialize the target. */
31 init(struct ipt_entry_target
*t
, unsigned int *nfcache
)
35 int string_to_priority(const char *s
, unsigned int *p
)
39 if (sscanf(s
, "%x:%x", &i
, &j
) != 2)
42 *p
= TC_H_MAKE(i
<<16, j
);
46 /* Function which parses command options; returns true if it
49 parse(int c
, char **argv
, int invert
, unsigned int *flags
,
50 const struct ipt_entry
*entry
,
51 struct ipt_entry_target
**target
)
53 struct ipt_classify_target_info
*clinfo
54 = (struct ipt_classify_target_info
*)(*target
)->data
;
58 if (string_to_priority(optarg
, &clinfo
->priority
))
59 exit_error(PARAMETER_PROBLEM
,
60 "Bad class value `%s'", optarg
);
62 exit_error(PARAMETER_PROBLEM
,
63 "CLASSIFY: Can't specify --set-class twice");
75 final_check(unsigned int flags
)
78 exit_error(PARAMETER_PROBLEM
,
79 "CLASSIFY: Parameter --set-class is required");
83 print_class(unsigned int priority
, int numeric
)
85 printf("%x:%x ", TC_H_MAJ(priority
)>>16, TC_H_MIN(priority
));
88 /* Prints out the targinfo. */
90 print(const struct ipt_ip
*ip
,
91 const struct ipt_entry_target
*target
,
94 const struct ipt_classify_target_info
*clinfo
=
95 (const struct ipt_classify_target_info
*)target
->data
;
96 printf("CLASSIFY set ");
97 print_class(clinfo
->priority
, numeric
);
100 /* Saves the union ipt_targinfo in parsable form to stdout. */
102 save(const struct ipt_ip
*ip
, const struct ipt_entry_target
*target
)
104 const struct ipt_classify_target_info
*clinfo
=
105 (const struct ipt_classify_target_info
*)target
->data
;
107 printf("--set-class %.4x:%.4x ",
108 TC_H_MAJ(clinfo
->priority
)>>16, TC_H_MIN(clinfo
->priority
));
111 static struct iptables_target classify
= {
114 .version
= IPTABLES_VERSION
,
115 .size
= IPT_ALIGN(sizeof(struct ipt_classify_target_info
)),
116 .userspacesize
= IPT_ALIGN(sizeof(struct ipt_classify_target_info
)),
120 .final_check
= &final_check
,
128 register_target(&classify
);