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Add more dual stack consideration.

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-ftpd need to know each of AF_INET and AF_INET6 addr for hosts specified in
   /etc/ftphosts.

Approved by: jkh
This commit is contained in:
Yoshinobu Inoue 2000-02-10 19:51:30 +00:00
parent 474ce1d190
commit f38c6cadf9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=57124
1 changed files with 27 additions and 19 deletions
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46
libexec/ftpd/ftpd.c
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@ -164,7 +164,7 @@ int epsvall = 0;
static struct ftphost {
struct ftphost *next;
union sockunion hostaddr;
struct addrinfo *hostinfo;
char *hostname;
char *anonuser;
char *statfile;
@ -628,22 +628,20 @@ inithosts()
if ((hrp = malloc(sizeof(struct ftphost))) == NULL ||
(hrp->hostname = strdup(line)) == NULL)
fatal("Ran out of memory.");
memset(&hrp->hostaddr, 0, sizeof(hrp->hostaddr));
hrp->hostinfo = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = AF_UNSPEC;
getaddrinfo(hrp->hostname, NULL, &hints, &res);
if (res)
memcpy(&hrp->hostaddr, res->ai_addr, res->ai_addrlen);
hrp->hostinfo = res;
hrp->statfile = _PATH_FTPDSTATFILE;
hrp->welcome = _PATH_FTPWELCOME;
hrp->loginmsg = _PATH_FTPLOGINMESG;
hrp->anonuser = "ftp";
hrp->next = NULL;
thishost = firsthost = lhrp = hrp;
if (res)
freeaddrinfo(res);
if ((fp = fopen(_PATH_FTPHOSTS, "r")) != NULL) {
int addrsize, error;
void *addr;
@ -676,10 +674,15 @@ inithosts()
{
for (hrp = firsthost; hrp != NULL; hrp = hrp->next) {
if (memcmp(&hrp->hostaddr,
ai->ai_addr,
ai->ai_addr->sa_len) == 0)
break;
struct addrinfo *hi;
for (hi = hrp->hostinfo; hi != NULL;
hi = hi->ai_next)
if (hi->ai_addrlen == ai->ai_addrlen &&
memcmp(hi->ai_addr,
ai->ai_addr,
ai->ai_addr->sa_len) == 0)
break;
}
if (hrp == NULL) {
if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
@ -693,32 +696,33 @@ inithosts()
lhrp->next = hrp;
lhrp = hrp;
}
(void) memcpy(&hrp->hostaddr,
ai->ai_addr,
ai->ai_addr->sa_len);
hrp->hostinfo = res;
/*
* determine hostname to use.
* force defined name if there is a valid alias
* otherwise fallback to primary hostname
*/
/* XXX: getaddrinfo() can't do alias check */
switch(hrp->hostaddr.su_family) {
switch(hrp->hostinfo->ai_family) {
case AF_INET:
addr = &((struct sockaddr_in *)&hrp->hostaddr)->sin_addr;
addr = &((struct sockaddr_in *)&hrp->hostinfo->ai_addr)->sin_addr;
addrsize = sizeof(struct sockaddr_in);
break;
case AF_INET6:
addr = &((struct sockaddr_in6 *)&hrp->hostaddr)->sin6_addr;
addr = &((struct sockaddr_in6 *)&hrp->hostinfo->ai_addr)->sin6_addr;
addrsize = sizeof(struct sockaddr_in6);
break;
default:
/* should not reach here */
if (hrp->hostinfo != NULL)
freeaddrinfo(hrp->hostinfo);
free(hrp);
continue;
/* NOTREACHED */
}
if ((hp = getipnodebyaddr((char*)addr, addrsize,
hrp->hostaddr.su_family,
hrp->hostinfo->ai_family,
&hp_error)) != NULL) {
if (strcmp(cp, hp->h_name) != 0) {
if (hp->h_aliases == NULL)
@ -773,6 +777,7 @@ selecthost(su)
#ifdef INET6
struct in6_addr *mapped_in6 = NULL;
#endif
struct addrinfo *hi;
#ifdef INET6
/*
@ -788,20 +793,23 @@ selecthost(su)
port = su->su_port;
su->su_port = 0;
while (hrp != NULL) {
if (memcmp(su, &hrp->hostaddr, sizeof(hrp->hostaddr)) == 0) {
for (hi = hrp->hostinfo; hi != NULL; hi = hi->ai_next)
{
if (memcmp(su, hi->ai_addr, hi->ai_addrlen) == 0) {
thishost = hrp;
break;
}
#ifdef INET6
/* XXX IPv4 mapped IPv6 addr consideraton */
if (hrp->hostaddr.su_family == AF_INET && mapped_in6 != NULL &&
if (hi->ai_addr->sa_family == AF_INET && mapped_in6 != NULL &&
(memcmp(&mapped_in6->s6_addr[12],
&hrp->hostaddr.su_sin.sin_addr,
&((struct sockaddr_in *)hi->ai_addr)->sin_addr,
sizeof(struct in_addr)) == 0)) {
thishost = hrp;
break;
}
#endif
}
hrp = hrp->next;
}
su->su_port = port;