diff options
Diffstat (limited to 'src/plugins/sys_util.h')
| -rw-r--r-- | src/plugins/sys_util.h | 163 |
1 files changed, 145 insertions, 18 deletions
diff --git a/src/plugins/sys_util.h b/src/plugins/sys_util.h index d449712..692a012 100644 --- a/src/plugins/sys_util.h +++ b/src/plugins/sys_util.h @@ -19,20 +19,71 @@ #include <sysrepo.h> #include <sysrepo/xpath.h> +#include <sysrepo/plugins.h> + +#include <netinet/in.h> +#include <arpa/inet.h> + +#include <string.h> + +#include <scvpp/comm.h> + +/* BEGIN sysrepo utils */ + +#define foreach_change(ds, it, oper, old, new) \ + while( (event != SR_EV_ABORT) && \ + sr_get_change_next(ds, it, &oper, &old, &new) == SR_ERR_OK) #define XPATH_SIZE 2000 +#define NOT_AVAL "NOT AVAILABLE" + +static inline int +get_xpath_key(char *dst, char *xpath, char *node, char *key, int length, + sr_xpath_ctx_t *state) { + char *tmp; + + tmp = sr_xpath_key_value(xpath, node, key, state); + if (!tmp) { + SRP_LOG_ERR("%s %s not found.", node, key); + return SR_ERR_INVAL_ARG; + } + strncpy(dst, tmp, length); + sr_xpath_recover(state); + + return 0; +} + +/* END of sysrepo utils */ typedef struct { - char xpath_root[XPATH_SIZE]; - sr_val_t * values; - size_t values_cnt; -} sysr_values_ctx_t; + uint8_t address[4]; +} sc_ipv4_addr; -char* xpath_find_first_key(const char *xpath, char *key, sr_xpath_ctx_t *state); -void log_recv_event(sr_notif_event_t event, const char *msg); -void log_recv_oper(sr_change_oper_t oper, const char *msg); -int ip_prefix_split(const char* ip_prefix); +/** + * @brief Extract IP "AAA.BBB.CCC.DDD" from an IP prefix: "AAA.BBB.CCC.DDD/XX" + * @param prefix - IPv4 or IPv6 prefix: + * @return prefix length + */ +static inline int ip_prefix_split(const char* ip_prefix) +{ + //find the slash + char* slash = strchr(ip_prefix, '/'); + if (NULL == slash) + return -1; + + //extract subnet mask length + char * eptr = NULL; + uint8_t plen = strtoul(slash + 1, &eptr, 10); + if (*eptr || plen <= 0) + return -1; + + //keep just the address part + *slash = '\0'; //replace '/' with 0 + + //return prefix length + return plen; +} /** * @brief Get IPv4 host address from IPv4 prefix. @@ -43,13 +94,61 @@ int ip_prefix_split(const char* ip_prefix); * @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); +static inline int +prefix2address(char *dst, const char *src, uint8_t *prefix_length) +{ + if (!src || !dst) + return -1; -typedef struct + char *p = strchr(src, '/'); + if (!p) + return -1; // '/' not found + + if ((p - src + 1) > VPP_IP4_ADDRESS_STRING_LEN) //+ 1 needed for \0 + return -1; + + strncpy(dst, src, VPP_IP4_ADDRESS_STRING_LEN); + + if (!prefix_length) + *prefix_length = atoi(++p); + + return 0; +} + +/** + * @brief Helper function for converting netmask (ex: 255.255.255.0) + * to prefix length (ex: 24). + * @param netmask - string of netmask "AAA.BBB.CCC.DDD" + * @return prefix length + */ +static inline uint8_t netmask_to_prefix(const char *netmask) { - uint8_t address[4]; -} sc_ipv4_addr; + in_addr_t n = 0; + uint8_t i = 0; + + inet_pton(AF_INET, netmask, &n); + + while (n > 0) { + n = n >> 1; + i++; + } + + return i; +} + +/** + * @brief Convert prefix length to netmask + * @param prefix - prefix length (ex: 24) + * @return netmask - integer (ex: 111111111111111111111111100000000b ) + */ +static inline uint32_t prefix2mask(int prefix) +{ + if (prefix) { + return htonl(~((1 << (32 - prefix)) - 1)); + } else { + return htonl(0); + } +} /** * @brief Get IPv4 broadcast IP address form IPv4 network address. @@ -59,8 +158,32 @@ typedef struct * @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); +static inline 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. @@ -70,8 +193,12 @@ int get_network_broadcast(sc_ipv4_addr *broadcast, const sc_ipv4_addr *network, * @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); +static inline 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); +} #endif /* __SYS_UTIL_H__ */ |