freebsd-src/release/sysinstall/ftp_strat.c
1996-03-02 07:31:58 +00:00

310 lines
8.3 KiB
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.
*
* $Id: ftp_strat.c,v 1.8 1995/12/07 10:33:48 peter Exp $
*
* Copyright (c) 1995
* Jordan Hubbard. All rights reserved.
* Copyright (c) 1995
* Gary J Palmer. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jordan Hubbard
* for the FreeBSD Project.
* 4. The name of Jordan Hubbard or the FreeBSD project may not be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* 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 "ftp.h"
Boolean ftpInitted = FALSE;
static FTP_t ftp;
extern int FtpPort;
static char *lastRequest;
static Boolean
get_new_host(Device *dev, Boolean probe)
{
Boolean i;
int j;
char *oldTitle = MenuMediaFTP.title;
char *cp = variable_get(VAR_FTP_ONERROR);
if (probe || (cp && strcmp(cp, "reselect")))
i = TRUE;
else {
i = FALSE;
dialog_clear();
msgConfirm("The %s file failed to load from the FTP site you\n"
"selected. Please select another one from the FTP menu.", lastRequest ? lastRequest : "requested");
MenuMediaFTP.title = "Request failed - please select another site";
j = mediaSetFTP(NULL);
MenuMediaFTP.title = oldTitle;
if (j == RET_SUCCESS) {
/* Bounce the link if necessary */
if (ftpInitted) {
msgDebug("Bouncing FTP connection before reselecting new host.\n");
dev->shutdown(dev);
i = dev->init(dev);
}
}
else {
msgDebug("User elected not to reselect, shutting down open connection.\n");
dev->shutdown(dev);
}
}
return i;
}
/* Should we throw in the towel? */
static Boolean
ftpShouldAbort(Device *dev, int retries)
{
char *cp, *cp2;
int maxretries, rval = FALSE;
cp = variable_get(VAR_FTP_ONERROR);
cp2 = variable_get(VAR_FTP_RETRIES);
maxretries = atoi(cp2);
if (retries > maxretries || (cp && !strcmp(cp, "abort"))) {
rval = TRUE;
if (isDebug())
msgDebug("Aborting FTP connection.\n");
dev->shutdown(dev);
}
return rval;
}
Boolean
mediaInitFTP(Device *dev)
{
int i, retries;
char *cp, *hostname, *dir;
char *user, *login_name, password[80], url[BUFSIZ];
Device *netDevice = (Device *)dev->private;
if (ftpInitted)
return TRUE;
if (isDebug())
msgDebug("Init routine for FTP called. Net device is %x\n", netDevice);
if (!netDevice->init(netDevice))
return FALSE;
if (!ftp && (ftp = FtpInit()) == NULL) {
dialog_clear();
msgConfirm("FTP initialisation failed!");
return FALSE;
}
cp = variable_get(VAR_FTP_PATH);
if (!cp) {
dialog_clear();
msgConfirm("%s is not set!", VAR_FTP_PATH);
return FALSE;
}
if (isDebug())
msgDebug("Attempting to open connection for URL: %s\n", cp);
hostname = variable_get(VAR_HOSTNAME);
if (strncmp("ftp://", cp, 6) != NULL) {
dialog_clear();
msgConfirm("Invalid URL: %s\n(A URL must start with `ftp://' here)", cp);
return FALSE;
}
strncpy(url, cp, BUFSIZ);
if (isDebug())
msgDebug("Using URL `%s'\n", url);
hostname = url + 6;
if ((cp = index(hostname, ':')) != NULL) {
*(cp++) = '\0';
FtpPort = strtol(cp, 0, 0);
}
else
FtpPort = 21;
if ((dir = index(cp ? cp : hostname, '/')) != NULL)
*(dir++) = '\0';
if (isDebug()) {
msgDebug("hostname = `%s'\n", hostname);
msgDebug("dir = `%s'\n", dir ? dir : "/");
msgDebug("port # = `%d'\n", FtpPort);
}
msgNotify("Looking up host %s..", hostname);
if ((gethostbyname(hostname) == NULL) && (inet_addr(hostname) == INADDR_NONE)) {
dialog_clear();
msgConfirm("Cannot resolve hostname `%s'! Are you sure that your\n"
"name server, gateway and network interface are configured?", hostname);
netDevice->shutdown(netDevice);
return FALSE;
}
user = variable_get(VAR_FTP_USER);
if (!user || !*user) {
snprintf(password, BUFSIZ, "installer@%s", variable_get(VAR_HOSTNAME));
login_name = "anonymous";
}
else {
login_name = user;
strcpy(password, variable_get(VAR_FTP_PASS) ? variable_get(VAR_FTP_PASS) : login_name);
}
retries = 0;
retry:
msgNotify("Logging in as %s..", login_name);
if (FtpOpen(ftp, hostname, login_name, password) != 0) {
if (variable_get(VAR_NO_CONFIRM))
msgNotify("Couldn't open FTP connection to %s", hostname);
else {
dialog_clear();
msgConfirm("Couldn't open FTP connection to %s", hostname);
}
if (ftpShouldAbort(dev, ++retries) || !get_new_host(dev, FALSE))
return FALSE;
goto retry;
}
FtpPassive(ftp, !strcmp(variable_get(VAR_FTP_STATE), "passive"));
FtpBinary(ftp, 1);
if (dir && *dir != '\0') {
msgNotify("Attempt to chdir to distribution in %s..", dir);
if ((i = FtpChdir(ftp, dir)) != 0) {
if (i == -2 || ftpShouldAbort(dev, ++retries))
goto punt;
else if (get_new_host(dev, FALSE))
retries = 0;
goto retry;
}
}
/* Give it a shot - can't hurt to try and zoom in if we can, unless we get a hard error back that is! */
if (FtpChdir(ftp, getenv(VAR_RELNAME)) == -2)
goto punt;
if (isDebug())
msgDebug("mediaInitFTP was successful (logged in and chdir'd)\n");
ftpInitted = TRUE;
return TRUE;
punt:
if (ftp != NULL) {
FtpClose(ftp);
ftp = NULL;
}
return FALSE;
}
int
mediaGetFTP(Device *dev, char *file, Boolean probe)
{
int fd;
int nretries;
char *fp;
char buf[PATH_MAX];
fp = file;
nretries = 0;
lastRequest = file;
while ((fd = FtpGet(ftp, fp)) < 0) {
/* If a hard fail, try to "bounce" the ftp server to clear it */
if (fd == -2 && ++nretries < atoi(variable_get(VAR_FTP_RETRIES))) {
dev->shutdown(dev);
/* If we can't re-initialize, just forget it */
if (!dev->init(dev))
return -2;
}
else if (probe || ftpShouldAbort(dev, ++nretries))
return -1;
else {
/* Try some alternatives */
switch (nretries) {
case 1:
sprintf(buf, "dists/%s", file);
fp = buf;
break;
case 2:
sprintf(buf, "%s/%s", variable_get(VAR_RELNAME), file);
fp = buf;
break;
case 3:
sprintf(buf, "%s/dists/%s", variable_get(VAR_RELNAME), file);
fp = buf;
break;
case 4:
fp = file;
if (get_new_host(dev, probe)) {
nretries = 0;
continue;
}
else
break;
}
}
}
return fd;
}
Boolean
mediaCloseFTP(Device *dev, int fd)
{
if (isDebug())
msgDebug("FTP Close called\n");
if (ftp)
FtpEOF(ftp);
return FALSE;
}
void
mediaShutdownFTP(Device *dev)
{
/* Device *netdev = (Device *)dev->private; */
if (!ftpInitted)
return;
if (isDebug())
msgDebug("FTP shutdown called. FTP = %x\n", ftp);
if (ftp != NULL) {
FtpClose(ftp);
ftp = NULL;
}
/* (*netdev->shutdown)(netdev); */
ftpInitted = FALSE;
}