FreeBSD-5.3/usr.sbin/sysinstall/ftp.c
/*
* The new sysinstall program.
*
* This is probably the last attempt in the `sysinstall' line, the next
* generation being slated to essentially a complete rewrite.
*
* $FreeBSD: src/usr.sbin/sysinstall/ftp.c,v 1.45 2002/10/14 13:06:13 nyan Exp $
*
* Copyright (c) 1995
* Jordan Hubbard. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* verbatim and that no modifications are made prior to this
* point in the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JORDAN HUBBARD OR HIS PETS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "sysinstall.h"
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/param.h>
#include <sys/wait.h>
#include <netdb.h>
#include <pwd.h>
#include <ftpio.h>
Boolean ftpInitted = FALSE;
static FILE *OpenConn;
int FtpPort;
/* List of sub directories to look for under a given FTP server. */
#ifdef PC98
const char *ftp_dirs[] = { ".", "releases/pc98", "snapshots/pc98",
"pub/FreeBSD", "pub/FreeBSD/releases/pc98",
"pub/FreeBSD/snapshots/pc98", NULL };
#else
const char *ftp_dirs[] = { ".", "releases/"MACHINE, "snapshots/"MACHINE,
"pub/FreeBSD", "pub/FreeBSD/releases/"MACHINE,
"pub/FreeBSD/snapshots/"MACHINE, NULL };
#endif
/* Brings up attached network device, if any - takes FTP device as arg */
static Boolean
netUp(Device *dev)
{
Device *netdev = (Device *)dev->private;
if (netdev)
return DEVICE_INIT(netdev);
else
return TRUE; /* No net == happy net */
}
/* Brings down attached network device, if any - takes FTP device as arg */
static void
netDown(Device *dev)
{
Device *netdev = (Device *)dev->private;
if (netdev)
DEVICE_SHUTDOWN(netdev);
}
Boolean
mediaInitFTP(Device *dev)
{
int i, code, af, fdir;
char *cp, *rel, *hostname, *dir;
char *user, *login_name, password[80];
if (ftpInitted)
return TRUE;
if (OpenConn) {
fclose(OpenConn);
OpenConn = NULL;
}
/* If we can't initialize the network, bag it! */
if (!netUp(dev))
return FALSE;
try:
cp = variable_get(VAR_FTP_PATH);
if (!cp) {
if (DITEM_STATUS(mediaSetFTP(NULL)) == DITEM_FAILURE || (cp = variable_get(VAR_FTP_PATH)) == NULL) {
msgConfirm("Unable to get proper FTP path. FTP media not initialized.");
netDown(dev);
return FALSE;
}
}
hostname = variable_get(VAR_FTP_HOST);
dir = variable_get(VAR_FTP_DIR);
if (!hostname || !dir) {
msgConfirm("Missing FTP host or directory specification. FTP media not initialized,");
netDown(dev);
return FALSE;
}
user = variable_get(VAR_FTP_USER);
login_name = (!user || !*user) ? "anonymous" : user;
if (variable_get(VAR_FTP_PASS))
SAFE_STRCPY(password, variable_get(VAR_FTP_PASS));
else if (RunningAsInit)
sprintf(password, "installer@%s", variable_get(VAR_HOSTNAME));
else {
struct passwd *pw;
char *user;
pw = getpwuid(getuid());
user = pw ? pw->pw_name : "ftp";
sprintf(password, "%s@%s", user, variable_get(VAR_HOSTNAME));
}
af = variable_cmp(VAR_IPV6_ENABLE, "YES") ? AF_INET : AF_UNSPEC;
msgNotify("Logging in to %s@%s..", login_name, hostname);
if ((OpenConn = ftpLoginAf(hostname, af, login_name, password, FtpPort, isDebug(), &code)) == NULL) {
msgConfirm("Couldn't open FTP connection to %s:\n %s.", hostname, ftpErrString(code));
goto punt;
}
ftpPassive(OpenConn, !strcmp(variable_get(VAR_FTP_STATE), "passive"));
ftpBinary(OpenConn);
if (dir && *dir != '\0') {
if ((i = ftpChdir(OpenConn, dir)) != 0) {
if (i == 550)
msgConfirm("No such directory ftp://%s/%s\n"
"please check your URL and try again.", hostname, dir);
else
msgConfirm("FTP chdir to ftp://%s/%s returned error status:\n %s.", hostname, dir, ftpErrString(i));
goto punt;
}
}
/*
* Now that we've verified that the path we're given is ok, let's try to
* be a bit intelligent in locating the release we are looking for. First
* off, if the release is specified as "__RELEASE" or "any", then just
* assume that the current directory is the one we want and give up.
*/
rel = variable_get(VAR_RELNAME);
if (strcmp(rel, "__RELEASE") && strcmp(rel, "any")) {
/*
* Ok, since we have a release variable, let's walk through the list
* of directories looking for a release directory. The first one to
* match wins. For each case, we chdir to ftp_dirs[fdir] first. If
* that fails, we skip to the next one. Otherwise, we try to chdir to
* rel. If it succeeds we break out. If it fails, then we go back to
* the base directory and try again. Lots of chdirs, but oh well. :)
*/
for (fdir = 0; ftp_dirs[fdir]; fdir++) {
/* Avoid sending CWD . commands which confuse some ftp servers */
if (strcmp(ftp_dirs[fdir], ".") &&
(ftpChdir(OpenConn, (char *)ftp_dirs[fdir]) != 0))
continue;
if (ftpChdir(OpenConn, rel) == 0) {
ftpInitted = TRUE;
return TRUE;
}
else /* reset to "root" dir for a fresh try */
ftpChdir(OpenConn, "/");
}
/*
* If we get here, then all of the directories we tried failed, so
* print out the error message and ask the user if they want to try
* again.
*/
if (!msgYesNo("Warning: Can't find the `%s' distribution on this\n"
"FTP server. You may need to visit a different server for\n"
"the release you are trying to fetch or go to the Options\n"
"menu and to set the release name to explicitly match what's\n"
"available on %s (or set to \"any\").\n\n"
"Would you like to select another FTP server?",
rel, hostname)) {
variable_unset(VAR_FTP_PATH);
if (DITEM_STATUS(mediaSetFTP(NULL)) != DITEM_FAILURE)
goto try;
}
} else {
ftpInitted = TRUE;
return TRUE;
}
punt:
ftpInitted = FALSE;
if (OpenConn != NULL) {
fclose(OpenConn);
OpenConn = NULL;
}
netDown(dev);
variable_unset(VAR_FTP_PATH);
return FALSE;
}
FILE *
mediaGetFTP(Device *dev, char *file, Boolean probe)
{
int nretries = 1;
FILE *fp;
char *try, buf[PATH_MAX];
if (!OpenConn) {
msgDebug("No FTP connection open, can't get file %s\n", file);
return NULL;
}
try = file;
while ((fp = ftpGet(OpenConn, try, 0)) == NULL) {
int ftperr = ftpErrno(OpenConn);
/* If a hard fail, try to "bounce" the ftp server to clear it */
if (ftperr != 550) {
if (ftperr != 421) /* Timeout? */
variable_unset(VAR_FTP_PATH);
/* If we can't re-initialize, just forget it */
DEVICE_SHUTDOWN(dev);
if (!DEVICE_INIT(dev)) {
netDown(dev);
if (OpenConn) {
fclose(OpenConn);
OpenConn = NULL;
}
variable_unset(VAR_FTP_PATH);
return NULL;
}
}
else if (probe)
return NULL;
else {
/* Try some alternatives */
switch (nretries++) {
case 1:
sprintf(buf, "releases/%s", file);
try = buf;
break;
case 2:
sprintf(buf, "%s/%s", variable_get(VAR_RELNAME), file);
try = buf;
break;
case 3:
sprintf(buf, "%s/releases/%s", variable_get(VAR_RELNAME), file);
try = buf;
break;
case 4:
try = file;
break;
}
}
}
return fp;
}
void
mediaShutdownFTP(Device *dev)
{
if (!ftpInitted)
return;
if (OpenConn != NULL) {
fclose(OpenConn);
OpenConn = NULL;
}
ftpInitted = FALSE;
}