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