diff options
Diffstat (limited to 'lib/command.c')
| -rw-r--r-- | lib/command.c | 144 |
1 files changed, 108 insertions, 36 deletions
diff --git a/lib/command.c b/lib/command.c index b3819048e5..4896c8a958 100644 --- a/lib/command.c +++ b/lib/command.c @@ -865,29 +865,59 @@ enum match_type exact_match }; -#define IPV4_ADDR_STR "0123456789." -#define IPV4_PREFIX_STR "0123456789./" - -/** - * Determines whether a string is a valid ipv4 token. - * - * @param[in] str the string to match - * @return exact_match if the string is an exact match, no_match/partly_match - * otherwise - */ static enum match_type cmd_ipv4_match (const char *str) { - struct sockaddr_in sin_dummy; + const char *sp; + int dots = 0, nums = 0; + char buf[4]; if (str == NULL) return partly_match; - if (strspn (str, IPV4_ADDR_STR) != strlen (str)) - return no_match; + for (;;) + { + memset (buf, 0, sizeof (buf)); + sp = str; + while (*str != '\0') + { + if (*str == '.') + { + if (dots >= 3) + return no_match; - if (inet_pton(AF_INET, str, &sin_dummy.sin_addr) != 1) - return no_match; + if (*(str + 1) == '.') + return no_match; + + if (*(str + 1) == '\0') + return partly_match; + + dots++; + break; + } + if (!isdigit ((int) *str)) + return no_match; + + str++; + } + + if (str - sp > 3) + return no_match; + + strncpy (buf, sp, str - sp); + if (atoi (buf) > 255) + return no_match; + + nums++; + + if (*str == '\0') + break; + + str++; + } + + if (nums < 4) + return partly_match; return exact_match; } @@ -895,36 +925,78 @@ cmd_ipv4_match (const char *str) static enum match_type cmd_ipv4_prefix_match (const char *str) { - struct sockaddr_in sin_dummy; - const char *delim = "/\0"; - char *dupe, *prefix, *mask, *context, *endptr; - int nmask = -1; + const char *sp; + int dots = 0; + char buf[4]; if (str == NULL) return partly_match; - if (strspn (str, IPV4_PREFIX_STR) != strlen (str)) - return no_match; + for (;;) + { + memset (buf, 0, sizeof (buf)); + sp = str; + while (*str != '\0' && *str != '/') + { + if (*str == '.') + { + if (dots == 3) + return no_match; - /* tokenize to address + mask */ - dupe = XMALLOC(MTYPE_TMP, strlen(str)+1); - strncpy(dupe, str, strlen(str)+1); - prefix = strtok_r(dupe, delim, &context); - mask = strtok_r(NULL, delim, &context); + if (*(str + 1) == '.' || *(str + 1) == '/') + return no_match; - if (!mask) - return partly_match; + if (*(str + 1) == '\0') + return partly_match; - /* validate prefix */ - if (inet_pton(AF_INET, prefix, &sin_dummy.sin_addr) != 1) - return no_match; + dots++; + break; + } - /* validate mask */ - nmask = strtol (mask, &endptr, 10); - if (*endptr != '\0' || nmask < 0 || nmask > 32) - return no_match; + if (!isdigit ((int) *str)) + return no_match; - XFREE(MTYPE_TMP, dupe); + str++; + } + + if (str - sp > 3) + return no_match; + + strncpy (buf, sp, str - sp); + if (atoi (buf) > 255) + return no_match; + + if (dots == 3) + { + if (*str == '/') + { + if (*(str + 1) == '\0') + return partly_match; + + str++; + break; + } + else if (*str == '\0') + return partly_match; + } + + if (*str == '\0') + return partly_match; + + str++; + } + + sp = str; + while (*str != '\0') + { + if (!isdigit ((int) *str)) + return no_match; + + str++; + } + + if (atoi (sp) > 32) + return no_match; return exact_match; } |