release/src/router/iproute2/tc/m_ematch.h

   1 #ifndef __TC_EMATCH_H_
   2 #define __TC_EMATCH_H_
   3
   4 #include <ctype.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 #include "utils.h"
   9 #include "tc_util.h"
  10
  11 #define EMATCHKINDSIZ 16
  12
  13 struct bstr
  14 {
  15         char    *data;
  16         unsigned int    len;
  17         int             quoted;
  18         struct bstr     *next;
  19 };
  20
  21 static inline struct bstr * bstr_alloc(const char *text)
  22 {
  23         struct bstr *b = calloc(1, sizeof(*b));
  24
  25         if (b == NULL)
  26                 return NULL;
  27
  28         b->data = strdup(text);
  29         if (b->data == NULL) {
  30                 free(b);
  31                 return NULL;
  32         }
  33
  34         b->len = strlen(text);
  35
  36         return b;
  37 }
  38
  39 static inline struct bstr * bstr_new(char *data, unsigned int len)
  40 {
  41         struct bstr *b = calloc(1, sizeof(*b));
  42
  43         if (b == NULL)
  44                 return NULL;
  45
  46         b->data = data;
  47         b->len = len;
  48
  49         return b;
  50 }
  51
  52 static inline int bstrcmp(struct bstr *b, const char *text)
  53 {
  54         int len = strlen(text);
  55         int d = b->len - len;
  56
  57         if (d == 0)
  58                 return strncmp(b->data, text, len);
  59
  60         return d;
  61 }
  62
  63 static inline unsigned long bstrtoul(struct bstr *b)
  64 {
  65         char *inv = NULL;
  66         unsigned long l;
  67         char buf[b->len+1];
  68
  69         memcpy(buf, b->data, b->len);
  70         buf[b->len] = '\0';
  71
  72         l = strtol(buf, &inv, 0);
  73         if (l == ULONG_MAX || inv == buf)
  74                 return LONG_MAX;
  75
  76         return l;
  77 }
  78
  79 static inline void bstr_print(FILE *fd, struct bstr *b, int ascii)
  80 {
  81         int i;
  82         char *s = b->data;
  83
  84         if (ascii)
  85                 for (i = 0; i < b->len; i++)
  86                     fprintf(fd, "%c", isprint(s[i]) ? s[i] : '.');
  87         else {
  88                 for (i = 0; i < b->len; i++)
  89                     fprintf(fd, "%02x", s[i]);
  90                 fprintf(fd, "\"");
  91                 for (i = 0; i < b->len; i++)
  92                     fprintf(fd, "%c", isprint(s[i]) ? s[i] : '.');
  93                 fprintf(fd, "\"");
  94         }
  95 }
  96
  97 static inline struct bstr *bstr_next(struct bstr *b)
  98 {
  99         return b->next;
 100 }
 101
 102 struct ematch
 103 {
 104         struct bstr     *args;
 105         int             index;
 106         int             inverted;
 107         int             relation;
 108         int             child_ref;
 109         struct ematch   *child;
 110         struct ematch   *next;
 111 };
 112
 113 static inline struct ematch * new_ematch(struct bstr *args, int inverted)
 114 {
 115         struct ematch *e = calloc(1, sizeof(*e));
 116
 117         if (e == NULL)
 118                 return NULL;
 119
 120         e->args = args;
 121         e->inverted = inverted;
 122
 123         return e;
 124 }
 125
 126 static inline void print_ematch_tree(struct ematch *tree)
 127 {
 128         struct ematch *t;
 129
 130         for (t = tree; t; t = t->next) {
 131                 if (t->inverted)
 132                         printf("NOT ");
 133
 134                 if (t->child) {
 135                         printf("(");
 136                         print_ematch_tree(t->child);
 137                         printf(")");
 138                 } else {
 139                         struct bstr *b;
 140                         for (b = t->args; b; b = b->next)
 141                                 printf("%s%s", b->data, b->next ? " " : "");
 142                 }
 143
 144                 if (t->relation == TCF_EM_REL_AND)
 145                         printf(" AND ");
 146                 else if (t->relation == TCF_EM_REL_OR)
 147                         printf(" OR ");
 148         }
 149 }
 150
 151 struct ematch_util
 152 {
 153         char                    kind[EMATCHKINDSIZ];
 154         int                     kind_num;
 155         int     (*parse_eopt)(struct nlmsghdr *,struct tcf_ematch_hdr *,
 156                               struct bstr *);
 157         int     (*print_eopt)(FILE *, struct tcf_ematch_hdr *, void *, int);
 158         void    (*print_usage)(FILE *);
 159         struct ematch_util      *next;
 160 };
 161
 162 static inline int parse_layer(struct bstr *b)
 163 {
 164         if (*((char *) b->data) == 'l')
 165                 return TCF_LAYER_LINK;
 166         else if (*((char *) b->data) == 'n')
 167                 return TCF_LAYER_NETWORK;
 168         else if (*((char *) b->data) == 't')
 169                 return TCF_LAYER_TRANSPORT;
 170         else
 171                 return INT_MAX;
 172 }
 173
 174 extern int em_parse_error(int err, struct bstr *args, struct bstr *carg,
 175                    struct ematch_util *, char *fmt, ...);
 176 extern int print_ematch(FILE *, const struct rtattr *);
 177 extern int parse_ematch(int *, char ***, int, struct nlmsghdr *);
 178
 179 #endif