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- /*
- * (c) 2008 Florian Westphal <fw@strlen.de>, public domain.
- */
- #ifndef NG_IPADDR_HDR
- #define NG_IPADDR_HDR
- #include "portab.h"
- /**
- * @file
- * Functions for AF_ agnostic ipv4/ipv6 handling (header).
- */
- #include <assert.h>
- #include <string.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #ifdef HAVE_ARPA_INET_H
- # include <arpa/inet.h>
- #else
- # define PF_INET AF_INET
- #endif
- #ifdef WANT_IPV6
- #define NG_INET_ADDRSTRLEN INET6_ADDRSTRLEN
- #else
- #define NG_INET_ADDRSTRLEN 16
- #endif
- #ifdef WANT_IPV6
- typedef union {
- struct sockaddr sa;
- struct sockaddr_in sin4;
- struct sockaddr_in6 sin6;
- } ng_ipaddr_t;
- #else
- /* assume compiler can't deal with typedef struct {... */
- struct NG_IP_ADDR_DONTUSE {
- struct sockaddr_in sin4;
- };
- typedef struct NG_IP_ADDR_DONTUSE ng_ipaddr_t;
- #endif
- static inline int
- ng_ipaddr_af(const ng_ipaddr_t *a)
- {
- assert(a != NULL);
- #ifdef WANT_IPV6
- return a->sa.sa_family;
- #else
- assert(a->sin4.sin_family == 0 || a->sin4.sin_family == AF_INET);
- return a->sin4.sin_family;
- #endif
- }
- static inline socklen_t
- ng_ipaddr_salen(const ng_ipaddr_t *a)
- {
- assert(a != NULL);
- #ifdef WANT_IPV6
- assert(a->sa.sa_family == AF_INET || a->sa.sa_family == AF_INET6);
- if (a->sa.sa_family == AF_INET6)
- return (socklen_t)sizeof(a->sin6);
- #endif
- assert(a->sin4.sin_family == AF_INET);
- return (socklen_t)sizeof(a->sin4);
- }
- static inline UINT16
- ng_ipaddr_getport(const ng_ipaddr_t *a)
- {
- #ifdef WANT_IPV6
- int af = a->sa.sa_family;
- assert(a != NULL);
- assert(af == AF_INET || af == AF_INET6);
- if (af == AF_INET6)
- return ntohs(a->sin6.sin6_port);
- #endif /* WANT_IPV6 */
- assert(a != NULL);
- assert(a->sin4.sin_family == AF_INET);
- return ntohs(a->sin4.sin_port);
- }
- /*
- * init a ng_ipaddr_t object.
- * @param addr: pointer to ng_ipaddr_t to initialize.
- * @param ip_str: ip address in dotted-decimal (ipv4) or hexadecimal (ipv6) notation
- * @param port: transport layer port number to use.
- */
- GLOBAL bool ng_ipaddr_init PARAMS((ng_ipaddr_t *addr, const char *ip_str, UINT16 port));
- /* set sin4/sin6_port, depending on a->sa_family */
- GLOBAL void ng_ipaddr_setport PARAMS((ng_ipaddr_t *a, UINT16 port));
- /* return true if a and b have the same IP address. If a and b have different AF, return false. */
- GLOBAL bool ng_ipaddr_ipequal PARAMS((const ng_ipaddr_t *a, const ng_ipaddr_t *b));
- #ifdef WANT_IPV6
- /* convert struct sockaddr to string, returns pointer to static buffer */
- GLOBAL const char *ng_ipaddr_tostr PARAMS((const ng_ipaddr_t *addr));
- /* convert struct sockaddr to string. dest must be NG_INET_ADDRSTRLEN bytes long */
- GLOBAL bool ng_ipaddr_tostr_r PARAMS((const ng_ipaddr_t *addr, char *dest));
- #else
- static inline const char*
- ng_ipaddr_tostr(const ng_ipaddr_t *addr)
- {
- assert(addr != NULL);
- return inet_ntoa(addr->sin4.sin_addr);
- }
- static inline bool
- ng_ipaddr_tostr_r(const ng_ipaddr_t *addr, char *d)
- {
- assert(addr != NULL);
- assert(d != NULL);
- strlcpy(d, inet_ntoa(addr->sin4.sin_addr), NG_INET_ADDRSTRLEN);
- return true;
- }
- #endif
- #endif
- /* -eof- */
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