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526862038e
ematche uses YACC to parse ematch arguments and places them in struct bstr linked lists. It is useful to be able to receive parameters as argc,argv in order to use getopt (and alike) argument parsers. Signed-off-by: Eyal Birger <eyal.birger@gmail.com> Signed-off-by: David Ahern <dsahern@gmail.com>
116 lines
2.2 KiB
C
116 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __TC_EMATCH_H_
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#define __TC_EMATCH_H_
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "utils.h"
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#include "tc_util.h"
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#define EMATCHKINDSIZ 16
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struct bstr
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{
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char *data;
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unsigned int len;
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int quoted;
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struct bstr *next;
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};
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extern struct bstr * bstr_alloc(const char *text);
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static inline struct bstr * bstr_new(char *data, unsigned int len)
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{
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struct bstr *b = calloc(1, sizeof(*b));
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if (b == NULL)
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return NULL;
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b->data = data;
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b->len = len;
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return b;
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}
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static inline int bstrcmp(struct bstr *b, const char *text)
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{
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int len = strlen(text);
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int d = b->len - len;
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if (d == 0)
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return strncmp(b->data, text, len);
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return d;
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}
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static inline struct bstr *bstr_next(struct bstr *b)
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{
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return b->next;
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}
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extern unsigned long bstrtoul(const struct bstr *b);
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extern void bstr_print(FILE *fd, const struct bstr *b, int ascii);
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struct ematch
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{
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struct bstr *args;
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int index;
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int inverted;
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int relation;
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int child_ref;
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struct ematch *child;
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struct ematch *next;
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};
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static inline struct ematch * new_ematch(struct bstr *args, int inverted)
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{
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struct ematch *e = calloc(1, sizeof(*e));
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if (e == NULL)
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return NULL;
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e->args = args;
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e->inverted = inverted;
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return e;
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}
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extern void print_ematch_tree(const struct ematch *tree);
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struct ematch_util
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{
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char kind[EMATCHKINDSIZ];
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int kind_num;
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int (*parse_eopt)(struct nlmsghdr *,struct tcf_ematch_hdr *,
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struct bstr *);
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int (*parse_eopt_argv)(struct nlmsghdr *, struct tcf_ematch_hdr *,
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int, char **);
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int (*print_eopt)(FILE *, struct tcf_ematch_hdr *, void *, int);
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void (*print_usage)(FILE *);
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struct ematch_util *next;
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};
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static inline int parse_layer(struct bstr *b)
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{
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if (*((char *) b->data) == 'l')
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return TCF_LAYER_LINK;
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else if (*((char *) b->data) == 'n')
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return TCF_LAYER_NETWORK;
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else if (*((char *) b->data) == 't')
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return TCF_LAYER_TRANSPORT;
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else
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return INT_MAX;
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}
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extern int em_parse_error(int err, struct bstr *args, struct bstr *carg,
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struct ematch_util *, char *fmt, ...);
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extern int print_ematch(FILE *, const struct rtattr *);
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extern int parse_ematch(int *, char ***, int, struct nlmsghdr *);
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#endif
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