examples/ipsec-secgw/parser.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016 Intel Corporation
   3  */
   4
   5 #include <sys/types.h>
   6 #include <netinet/in.h>
   7 #include <netinet/ip.h>
   8
   9 #ifndef __PARSER_H
  10 #define __PARSER_H
  11
  12 struct parse_status {
  13         int status;
  14         char parse_msg[256];
  15 };
  16
  17 #define APP_CHECK(exp, status, fmt, ...)                                \
  18 do {                                                                    \
  19         if (!(exp)) {                                                   \
  20                 sprintf(status->parse_msg, fmt "\n",                    \
  21                         ## __VA_ARGS__);                                \
  22                 status->status = -1;                                    \
  23         } else                                                          \
  24                 status->status = 0;                                     \
  25 } while (0)
  26
  27 #define APP_CHECK_PRESENCE(val, str, status)                            \
  28         APP_CHECK(val == 0, status,                                     \
  29                 "item \"%s\" already present", str)
  30
  31 #define APP_CHECK_TOKEN_EQUAL(tokens, index, ref, status)               \
  32         APP_CHECK(strcmp(tokens[index], ref) == 0, status,              \
  33                 "unrecognized input \"%s\": expect \"%s\"\n",           \
  34                 tokens[index], ref)
  35
  36 static inline int
  37 is_str_num(const char *str)
  38 {
  39         uint32_t i;
  40
  41         for (i = 0; i < strlen(str); i++)
  42                 if (!isdigit(str[i]))
  43                         return -1;
  44
  45         return 0;
  46 }
  47
  48 #define APP_CHECK_TOKEN_IS_NUM(tokens, index, status)                   \
  49         APP_CHECK(is_str_num(tokens[index]) == 0, status,               \
  50         "input \"%s\" is not valid number string", tokens[index])
  51
  52
  53 #define INCREMENT_TOKEN_INDEX(index, max_num, status)                   \
  54 do {                                                                    \
  55         APP_CHECK(index + 1 < max_num, status, "reaching the end of "   \
  56                 "the token array");                                     \
  57         index++;                                                        \
  58 } while (0)
  59
  60 int
  61 parse_ipv4_addr(const char *token, struct in_addr *ipv4, uint32_t *mask);
  62
  63 int
  64 parse_ipv6_addr(const char *token, struct in6_addr *ipv6, uint32_t *mask);
  65
  66 int
  67 parse_range(const char *token, uint16_t *low, uint16_t *high);
  68
  69 void
  70 parse_sp4_tokens(char **tokens, uint32_t n_tokens,
  71         struct parse_status *status);
  72
  73 void
  74 parse_sp6_tokens(char **tokens, uint32_t n_tokens,
  75         struct parse_status *status);
  76
  77 void
  78 parse_sa_tokens(char **tokens, uint32_t n_tokens,
  79         struct parse_status *status);
  80
  81 void
  82 parse_rt_tokens(char **tokens, uint32_t n_tokens,
  83         struct parse_status *status);
  84
  85 int
  86 parse_cfg_file(const char *cfg_filename);
  87
  88 #endif