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Return IPv4 native address for IPv4 mapped IPv6 address, even if

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A RR is not found.

Reviewed by:	shin
This commit is contained in:
Hajimu UMEMOTO 2000-03-23 17:25:00 +00:00
parent 604f4516ef
commit 9ed4e87cad
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=58495
1 changed files with 23 additions and 8 deletions
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31
lib/libutil/realhostname.c
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@ -158,17 +158,13 @@ realhostname_sa(char *host, size_t hsize, struct sockaddr *addr, int addrlen)
!memcmp(&in6->s6_addr[12], in,
sizeof(*in))) {
result = HOSTNAME_FOUND;
if (res->ai_canonname == 0) {
if (res->ai_canonname == 0 ||
strlen(res->ai_canonname) > hsize) {
freeaddrinfo(ores);
goto numeric;
}
if (strlen(res->ai_canonname) > hsize)
strncpy(host, inet_ntoa(*in),
hsize);
else
strncpy(host,
res->ai_canonname,
hsize);
strncpy(host, res->ai_canonname,
hsize);
break;
}
}
@ -176,7 +172,26 @@ realhostname_sa(char *host, size_t hsize, struct sockaddr *addr, int addrlen)
}
freeaddrinfo(ores);
} else {
struct sockaddr_in sin;
numeric:
#ifdef INET6
if (addr->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)addr;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
memset(&sin, 0, sizeof(sin));
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_family = AF_INET;
sin.sin_port = sin6->sin6_port;
memcpy(&sin.sin_addr,
&sin6->sin6_addr.s6_addr[12],
sizeof(struct in_addr));
addr = (struct sockaddr *)&sin;
addrlen = sin.sin_len;
}
}
#endif
if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0,
NI_NUMERICHOST|NI_WITHSCOPEID) == 0)
strncpy(host, buf, hsize);