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- reject numeric address

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- validate scope in sockaddr comparison logic

patch was originally submitted by itojun and slightly modified by me.

Reviewed by:	itojun, kris
This commit is contained in:
Hajimu UMEMOTO 2000-09-25 00:41:55 +00:00
parent 65e893c9b9
commit 6568848868
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=66329
1 changed files with 22 additions and 0 deletions
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22
contrib/tcp_wrappers/socket.c
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@ -217,6 +217,23 @@ struct host_info *host;
STRN_CPY(host->name, hname, sizeof(host->name));
/* reject numeric addresses */
memset(&hints, 0, sizeof(hints));
hints.ai_family = sin->sa_family;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST;
if ((err = getaddrinfo(host->name, NULL, &hints, &res0) == 0)) {
freeaddrinfo(res0);
tcpd_warn("host name/name mismatch: "
"reverse lookup results in non-FQDN %s",
host->name);
strcpy(host->name, paranoid); /* name is bad, clobber it */
}
err = !err;
}
if (!err) {
/* we are now sure that this is non-numeric */
/*
* Verify that the address is a member of the address list returned
* by gethostbyname(hostname).
@ -276,6 +293,11 @@ struct host_info *host;
rap = (char *)&((struct sockaddr_in *)res->ai_addr)->sin_addr;
break;
case AF_INET6:
/* need to check scope_id */
if (((struct sockaddr_in6 *)sin)->sin6_scope_id !=
((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id) {
continue;
}
rap = (char *)&((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
break;
default: