diff options
Diffstat (limited to 'libglusterfs/src/common-utils.c')
| -rw-r--r-- | libglusterfs/src/common-utils.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c index 1dfb418e4a8..96319624361 100644 --- a/libglusterfs/src/common-utils.c +++ b/libglusterfs/src/common-utils.c @@ -1921,6 +1921,70 @@ out: return ret; } +/** + * valid_ipv4_subnetwork() takes the pattern and checks if it contains + * a valid ipv4 subnetwork pattern i.e. xx.xx.xx.xx/n. IPv4 address + * part (xx.xx.xx.xx) and mask bits lengh part (n). The mask bits lengh + * must be in 0-32 range (ipv4 addr is 32 bit). The pattern must be + * in this format. + * + * Returns _gf_true if both IP addr and mask bits len are valid + * _gf_false otherwise. + */ +gf_boolean_t +valid_ipv4_subnetwork (const char *address) +{ + char *slash = NULL; + char *paddr = NULL; + char *endptr = NULL; + long prefixlen = -1; + gf_boolean_t retv = _gf_true; + + if (address == NULL) { + gf_log_callingfn (THIS->name, GF_LOG_WARNING, + "argument invalid"); + return _gf_false; + } + + paddr = gf_strdup (address); + if (paddr == NULL) /* ENOMEM */ + return _gf_false; + + /* + * INVALID: If '/' is not present OR + * Nothing specified after '/' + */ + slash = strchr(paddr, '/'); + if ((slash == NULL) || (slash[1] == '\0')) { + gf_log_callingfn (THIS->name, GF_LOG_WARNING, + "Invalid IPv4 subnetwork format"); + retv = _gf_false; + goto out; + } + + *slash = '\0'; + retv = valid_ipv4_address (paddr, strlen(paddr), _gf_false); + if (retv == _gf_false) { + gf_log_callingfn (THIS->name, GF_LOG_WARNING, + "Invalid IPv4 subnetwork address"); + goto out; + } + + prefixlen = strtol (slash + 1, &endptr, 10); + if ((errno != 0) || (*endptr != '\0') || + (prefixlen < 0) || (prefixlen > IPv4_ADDR_SIZE)) { + gf_log_callingfn (THIS->name, GF_LOG_WARNING, + "Invalid IPv4 subnetwork mask"); + retv = _gf_false; + goto out; + } + + retv = _gf_true; +out: + GF_FREE (paddr); + return retv; +} + char valid_ipv6_address (char *address, int length, gf_boolean_t wildcard_acc) { @@ -2045,6 +2109,23 @@ gf_sock_union_equal_addr (union gf_sock_union *a, return _gf_false; } +/* + * Check if both have same network address. + * Extract the network address from the sockaddr(s) addr by applying the + * network mask. If they match, return boolean _gf_true, _gf_false otherwise. + * + * (x == y) <=> (x ^ y == 0) + * (x & y) ^ (x & z) <=> x & (y ^ z) + * + * ((ip1 & mask) == (ip2 & mask)) <=> ((mask & (ip1 ^ ip2)) == 0) + */ +gf_boolean_t +mask_match(const uint32_t a, const uint32_t b, const uint32_t m) +{ + return (((a ^ b) & m) == 0); +} + + /*Thread safe conversion function*/ char * uuid_utoa (uuid_t uuid) |