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- Reduce needless DNS query by lookup only appropriate address

Browse source 
family. [1]
- Specify appropriate hints to getaddrinfo(3). [1]
- Obtain address family from peername in inet mode.

Submitted by:	Rostislav Krasny <rosti.bsd__at__gmail.com> [1]
Tested by:	yar, Rostislav Krasny <rosti.bsd__at__gmail.com>
MFC after:	1 week
This commit is contained in:
Hajimu UMEMOTO 2006-03-01 16:13:17 +00:00
parent 3a0b3b6739
commit 2c9fd5f29e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=156156
1 changed files with 20 additions and 10 deletions
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30
libexec/ftpd/ftpd.c
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@ -239,7 +239,7 @@ static int transflag; /* NB: for debugging only */
}
#ifdef VIRTUAL_HOSTING
static void inithosts(void);
static void inithosts(int);
static void selecthost(union sockunion *);
#endif
static void ack(char *);
@ -423,10 +423,6 @@ main(int argc, char *argv[], char **envp)
}
}
#ifdef VIRTUAL_HOSTING
inithosts();
#endif
if (daemon_mode) {
int *ctl_sock, fd, maxfd = -1, nfds, i;
fd_set defreadfds, readfds;
@ -456,6 +452,10 @@ main(int argc, char *argv[], char **envp)
sa.sa_handler = reapchild;
(void)sigaction(SIGCHLD, &sa, NULL);
#ifdef VIRTUAL_HOSTING
inithosts(family);
#endif
/*
* Open a socket, bind it to the FTP port, and start
* listening.
@ -525,6 +525,15 @@ main(int argc, char *argv[], char **envp)
syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
exit(1);
}
#ifdef VIRTUAL_HOSTING
if (his_addr.su_family == AF_INET6 &&
IN6_IS_ADDR_V4MAPPED(&his_addr.su_sin6.sin6_addr))
family = AF_INET;
else
family = his_addr.su_family;
inithosts(family);
#endif
}
gotchild:
@ -663,7 +672,7 @@ sigquit(int signo)
*/
static void
inithosts(void)
inithosts(int family)
{
int insert;
size_t len;
@ -688,8 +697,9 @@ inithosts(void)
hrp->hostinfo = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = AF_UNSPEC;
hints.ai_flags = AI_PASSIVE;
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
if (getaddrinfo(hrp->hostname, NULL, &hints, &res) == 0)
hrp->hostinfo = res;
hrp->statfile = _PATH_FTPDSTATFILE;
@ -759,9 +769,9 @@ inithosts(void)
/* NOTREACHED */
}
hints.ai_flags = 0;
hints.ai_family = AF_UNSPEC;
hints.ai_flags = AI_PASSIVE;
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
if (getaddrinfo(vhost, NULL, &hints, &res) != 0)
goto nextline;
for (ai = res; ai != NULL && ai->ai_addr != NULL;