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/*
* Functions for AF_ agnostic ipv4/ipv6 handling.
*
* (c) 2008 Florian Westphal <fw@strlen.de>, public domain.
*/
#include "portab.h"
#include <assert.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_GETADDRINFO
#include <netdb.h>
#include <sys/types.h>
#endif
#include <sys/socket.h>
#include <netinet/in.h>
#include "ng_ipaddr.h"
GLOBAL bool
ng_ipaddr_init(ng_ipaddr_t *addr, const char *ip_str, UINT16 port)
{
#ifdef HAVE_GETADDRINFO
int ret;
char portstr[64];
struct addrinfo *res0;
struct addrinfo hints = {
#ifndef WANT_IPV6 /* only accept v4 addresses */
.ai_family = AF_INET,
#endif
.ai_flags = AI_NUMERICHOST
};
if (ip_str == NULL)
hints.ai_flags |= AI_PASSIVE;
/* silly, but ngircd stores UINT16 in server config, not string */
snprintf(portstr, sizeof(portstr), "%u", (unsigned int) port);
ret = getaddrinfo(ip_str, portstr, &hints, &res0);
assert(ret == 0);
if (ret != 0)
return false;
assert(sizeof(*addr) >= res0->ai_addrlen);
if (sizeof(*addr) >= res0->ai_addrlen)
memcpy(addr, res0->ai_addr, res0->ai_addrlen);
else
ret = -1;
freeaddrinfo(res0);
return ret == 0;
#else /* HAVE_GETADDRINFO */
if (ip_str == NULL)
ip_str = "0.0.0.0";
addr->sin4.sin_family = AF_INET;
# ifdef HAVE_INET_ATON
if (inet_aton(ip_str, &addr->sin4.sin_addr) == 0)
return false;
# else
addr->sin4.sin_addr.s_addr = inet_addr(ip_str);
if (addr->sin4.sin_addr.s_addr == (unsigned) -1)
return false;
# endif
ng_ipaddr_setport(addr, port);
return true;
#endif /* HAVE_GETADDRINFO */
}
GLOBAL void
ng_ipaddr_setport(ng_ipaddr_t *a, UINT16 port)
{
#ifdef WANT_IPV6
int af;
assert(a != NULL);
af = a->sa.sa_family;
assert(af == AF_INET || af == AF_INET6);
switch (af) {
case AF_INET:
a->sin4.sin_port = htons(port);
break;
case AF_INET6:
a->sin6.sin6_port = htons(port);
break;
}
#else /* WANT_IPV6 */
assert(a != NULL);
assert(a->sin4.sin_family == AF_INET);
a->sin4.sin_port = htons(port);
#endif /* WANT_IPV6 */
}
GLOBAL bool
ng_ipaddr_ipequal(const ng_ipaddr_t *a, const ng_ipaddr_t *b)
{
assert(a != NULL);
assert(b != NULL);
#ifdef WANT_IPV6
if (a->sa.sa_family != b->sa.sa_family)
return false;
assert(ng_ipaddr_salen(a) == ng_ipaddr_salen(b));
switch (a->sa.sa_family) {
case AF_INET6:
return IN6_ARE_ADDR_EQUAL(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
case AF_INET:
return memcmp(&a->sin4.sin_addr, &b->sin4.sin_addr, sizeof(a->sin4.sin_addr)) == 0;
}
return false;
#else
assert(a->sin4.sin_family == AF_INET);
assert(b->sin4.sin_family == AF_INET);
return memcmp(&a->sin4.sin_addr, &b->sin4.sin_addr, sizeof(a->sin4.sin_addr)) == 0;
#endif
}
#ifdef WANT_IPV6
GLOBAL const char *
ng_ipaddr_tostr(const ng_ipaddr_t *addr)
{
static char strbuf[NG_INET_ADDRSTRLEN];
strbuf[0] = 0;
ng_ipaddr_tostr_r(addr, strbuf);
return strbuf;
}
/* str must be at least NG_INET_ADDRSTRLEN bytes long */
GLOBAL bool
ng_ipaddr_tostr_r(const ng_ipaddr_t *addr, char *str)
{
#ifdef HAVE_GETNAMEINFO
const struct sockaddr *sa = (const struct sockaddr *) addr;
int ret;
*str = 0;
ret = getnameinfo(sa, ng_ipaddr_salen(addr),
str, NG_INET_ADDRSTRLEN, NULL, 0, NI_NUMERICHOST);
/*
* avoid leading ':'.
* causes mis-interpretation of client host in e.g. /WHOIS
*/
if (*str == ':') {
char tmp[NG_INET_ADDRSTRLEN] = "0";
ret = getnameinfo(sa, ng_ipaddr_salen(addr),
tmp+1, sizeof(tmp) -1, NULL, 0, NI_NUMERICHOST);
if (ret == 0)
strlcpy(str, tmp, NG_INET_ADDRSTRLEN);
}
assert (ret == 0);
return ret == 0;
#else
abort(); /* WANT_IPV6 depends on HAVE_GETNAMEINFO */
#endif
}
#endif /* WANT_IPV6 */
/* -eof- */
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