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 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 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 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 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 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
