1 #ifndef __TC_EMATCH_H_
2 #define __TC_EMATCH_H_
3
4 #include <ctype.h>
5 #include <stdlib.h>
6 #include <string.h>
7 #include <limits.h>
8
9 #include "utils.h"
10 #include "tc_util.h"
11
12 #define EMATCHKINDSIZ 16
13
14 struct bstr
15 {
16 char *data;
17 unsigned int len;
18 int quoted;
19 struct bstr *next;
20 };
21
22 extern struct bstr * bstr_alloc(const char *text);
23
bstr_new(char * data,unsigned int len)24 static inline struct bstr * bstr_new(char *data, unsigned int len)
25 {
26 struct bstr *b = calloc(1, sizeof(*b));
27
28 if (b == NULL)
29 return NULL;
30
31 b->data = data;
32 b->len = len;
33
34 return b;
35 }
36
bstrcmp(struct bstr * b,const char * text)37 static inline int bstrcmp(struct bstr *b, const char *text)
38 {
39 int len = strlen(text);
40 int d = b->len - len;
41
42 if (d == 0)
43 return strncmp(b->data, text, len);
44
45 return d;
46 }
47
bstr_next(struct bstr * b)48 static inline struct bstr *bstr_next(struct bstr *b)
49 {
50 return b->next;
51 }
52
53 extern unsigned long bstrtoul(const struct bstr *b);
54 extern void bstr_print(FILE *fd, const struct bstr *b, int ascii);
55
56
57 struct ematch
58 {
59 struct bstr *args;
60 int index;
61 int inverted;
62 int relation;
63 int child_ref;
64 struct ematch *child;
65 struct ematch *next;
66 };
67
new_ematch(struct bstr * args,int inverted)68 static inline struct ematch * new_ematch(struct bstr *args, int inverted)
69 {
70 struct ematch *e = calloc(1, sizeof(*e));
71
72 if (e == NULL)
73 return NULL;
74
75 e->args = args;
76 e->inverted = inverted;
77
78 return e;
79 }
80
81 extern void print_ematch_tree(const struct ematch *tree);
82
83
84 struct ematch_util
85 {
86 char kind[EMATCHKINDSIZ];
87 int kind_num;
88 int (*parse_eopt)(struct nlmsghdr *,struct tcf_ematch_hdr *,
89 struct bstr *);
90 int (*print_eopt)(FILE *, struct tcf_ematch_hdr *, void *, int);
91 void (*print_usage)(FILE *);
92 struct ematch_util *next;
93 };
94
parse_layer(struct bstr * b)95 static inline int parse_layer(struct bstr *b)
96 {
97 if (*((char *) b->data) == 'l')
98 return TCF_LAYER_LINK;
99 else if (*((char *) b->data) == 'n')
100 return TCF_LAYER_NETWORK;
101 else if (*((char *) b->data) == 't')
102 return TCF_LAYER_TRANSPORT;
103 else
104 return INT_MAX;
105 }
106
107 extern int em_parse_error(int err, struct bstr *args, struct bstr *carg,
108 struct ematch_util *, char *fmt, ...);
109 extern int print_ematch(FILE *, const struct rtattr *);
110 extern int parse_ematch(int *, char ***, int, struct nlmsghdr *);
111
112 #endif
113