diff options
Diffstat (limited to 'src/plugins/sys_util.c')
-rw-r--r-- | src/plugins/sys_util.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/plugins/sys_util.c b/src/plugins/sys_util.c index 7bd0937..a3ee0c9 100644 --- a/src/plugins/sys_util.c +++ b/src/plugins/sys_util.c @@ -81,3 +81,90 @@ int ip_prefix_split(const char* ip_prefix) //return mask length return mask; } + +/** + * @brief Get IPv4 host address from IPv4 prefix. + * + * @param[out] dst Host IPv4 address. + * @param[in] src IPv4 Prefix. + * @param[in] length dst buffer length. + * @param[out] prefix Get Prefix length, optional value. Can be NULL. + * @return -1 when failure, 0 on success. + */ +int get_address_from_prefix(char *dst, const char *src, size_t length, + uint8_t *prefix_length) +{ + ARG_CHECK2(-1, src, dst); + + size_t size = 0; + char *p = strchr(src, '/'); + if (NULL == p) { + return -1; + } + + size = p - src; + + // + 1, need size for \0 + if ((size + 1) > length) { + return -1; + } + + strncpy(dst, src, size); + + if (NULL != prefix_length) { + *prefix_length = atoi(++p); + } + + return 0; +} + +/** + * @brief Get IPv4 broadcast IP address form IPv4 network address. + * + * @param[out] broadcat Broadcast Ipv4 address. + * @param[in] network Network IPv4 address. + * @param[in] prefix Prefix number. + * @return -1 when failure, 0 on success. + */ +int get_network_broadcast(sc_ipv4_addr *broadcast, const sc_ipv4_addr *network, + uint8_t prefix_length) +{ + uint8_t mask = ~0; + uint8_t tmp_p = prefix_length; + int i; + + ARG_CHECK2(-1, network, broadcast); + + if (32 < prefix_length) { + SRP_LOG_ERR_MSG("Prefix length to big."); + return -1; + } + + for (i = 0; i < 4 ; i++) { + broadcast->address[i] = network->address[i] | + (mask >> (tmp_p > 8 ? 8 : tmp_p)); + if (tmp_p >= 8) { + tmp_p -= 8; + } else { + tmp_p = 0; + } + } + + return 0; +} + +/** + * @brief Get last IPv4 address from the IP range. + * + * @param[out] last_ip_address Last Ipv4 address. + * @param[in] first_ip_address First IPv4 address. + * @param[in] prefix Prefix number. + * @return -1 when failure, 0 on success. + */ +int get_last_ip_address(sc_ipv4_addr* last_ip_address, + const sc_ipv4_addr* first_ip_address, + uint8_t prefix_length) +{ + return get_network_broadcast(last_ip_address, first_ip_address, + prefix_length); +} |