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310 lines
8.3 KiB
C
310 lines
8.3 KiB
C
/*
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* The new sysinstall program.
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*
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* This is probably the last attempt in the `sysinstall' line, the next
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* generation being slated to essentially a complete rewrite.
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*
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* $Id: ftp_strat.c,v 1.14 1996/04/28 03:26:57 jkh Exp $
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*
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* Copyright (c) 1995
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* Jordan Hubbard. All rights reserved.
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* Copyright (c) 1995
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* Gary J Palmer. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* verbatim and that no modifications are made prior to this
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* point in the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JORDAN HUBBARD OR HIS PETS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "sysinstall.h"
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/param.h>
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#include <sys/wait.h>
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#include <netdb.h>
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#include "ftp.h"
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Boolean ftpInitted = FALSE;
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static FTP_t ftp;
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extern int FtpPort;
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static char *lastRequest;
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static Boolean
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get_new_host(Device *dev, Boolean probe)
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{
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Boolean i;
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int j;
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char *oldTitle = MenuMediaFTP.title;
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char *cp = variable_get(VAR_FTP_ONERROR);
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if (probe || (cp && strcmp(cp, "reselect")))
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i = TRUE;
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else {
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i = FALSE;
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msgConfirm("The %s file failed to load from the FTP site you\n"
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"selected. Please select another one from the FTP menu.", lastRequest ? lastRequest : "requested");
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MenuMediaFTP.title = "Request failed - please select another site";
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j = mediaSetFTP(NULL);
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MenuMediaFTP.title = oldTitle;
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if (DITEM_STATUS(j) == DITEM_SUCCESS) {
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/* Bounce the link if necessary */
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if (ftpInitted) {
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msgDebug("Bouncing FTP connection before reselecting new host.\n");
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dev->shutdown(dev);
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i = dev->init(dev);
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}
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}
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else {
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msgDebug("User elected not to reselect, shutting down open connection.\n");
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dev->shutdown(dev);
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}
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}
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return i;
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}
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/* Should we throw in the towel? */
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static Boolean
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ftpShouldAbort(Device *dev, int retries)
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{
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char *cp, *cp2;
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int maxretries, rval = FALSE;
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cp = variable_get(VAR_FTP_ONERROR);
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cp2 = variable_get(VAR_FTP_RETRIES);
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maxretries = atoi(cp2);
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if (retries > maxretries || (cp && !strcmp(cp, "abort"))) {
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rval = TRUE;
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if (isDebug())
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msgDebug("Aborting FTP connection.\n");
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dev->shutdown(dev);
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(void)dev->init(dev);
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}
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return rval;
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}
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Boolean
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mediaInitFTP(Device *dev)
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{
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int i, retries;
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char *cp, *hostname, *dir;
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char *user, *login_name, password[80], url[BUFSIZ];
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Device *netDevice = (Device *)dev->private;
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if (ftpInitted)
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return TRUE;
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if (isDebug())
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msgDebug("Init routine for FTP called. Net device is %x\n", netDevice);
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if (!netDevice->init(netDevice)) {
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if (isDebug())
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msgDebug("InitFTP: Net device init returns FALSE\n");
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return FALSE;
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}
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if (!ftp && (ftp = FtpInit()) == NULL) {
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msgConfirm("FTP initialisation failed!");
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return FALSE;
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}
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cp = variable_get(VAR_FTP_PATH);
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if (!cp) {
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msgConfirm("%s is not set!", VAR_FTP_PATH);
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return FALSE;
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}
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if (isDebug())
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msgDebug("Attempting to open connection for URL: %s\n", cp);
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hostname = variable_get(VAR_HOSTNAME);
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if (strncmp("ftp://", cp, 6) != NULL) {
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msgConfirm("Invalid URL: %s\n(A URL must start with `ftp://' here)", cp);
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return FALSE;
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}
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strncpy(url, cp, BUFSIZ);
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if (isDebug())
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msgDebug("Using URL `%s'\n", url);
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hostname = url + 6;
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if ((cp = index(hostname, ':')) != NULL) {
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*(cp++) = '\0';
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FtpPort = strtol(cp, 0, 0);
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}
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else
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FtpPort = 21;
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if ((dir = index(cp ? cp : hostname, '/')) != NULL)
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*(dir++) = '\0';
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if (isDebug()) {
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msgDebug("hostname = `%s'\n", hostname);
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msgDebug("dir = `%s'\n", dir ? dir : "/");
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msgDebug("port # = `%d'\n", FtpPort);
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}
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msgNotify("Looking up host %s..", hostname);
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if ((gethostbyname(hostname) == NULL) && (inet_addr(hostname) == INADDR_NONE)) {
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msgConfirm("Cannot resolve hostname `%s'! Are you sure that your\n"
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"name server, gateway and network interface are correctly configured?", hostname);
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netDevice->shutdown(netDevice);
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tcpOpenDialog(netDevice);
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return FALSE;
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}
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user = variable_get(VAR_FTP_USER);
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if (!user || !*user) {
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snprintf(password, BUFSIZ, "installer@%s", variable_get(VAR_HOSTNAME));
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login_name = "anonymous";
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}
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else {
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login_name = user;
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strcpy(password, variable_get(VAR_FTP_PASS) ? variable_get(VAR_FTP_PASS) : login_name);
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}
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retries = 0;
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retry:
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msgNotify("Logging in as %s..", login_name);
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if (FtpOpen(ftp, hostname, login_name, password) != 0) {
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if (variable_get(VAR_NO_CONFIRM))
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msgNotify("Couldn't open FTP connection to %s", hostname);
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else
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msgConfirm("Couldn't open FTP connection to %s", hostname);
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if (ftpShouldAbort(dev, ++retries) || !get_new_host(dev, FALSE))
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return FALSE;
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goto retry;
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}
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FtpPassive(ftp, !strcmp(variable_get(VAR_FTP_STATE), "passive"));
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FtpBinary(ftp, 1);
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if (dir && *dir != '\0') {
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msgDebug("Attempt to chdir to distribution in %s\n", dir);
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if ((i = FtpChdir(ftp, dir)) != 0) {
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if (i == -2 || ftpShouldAbort(dev, ++retries))
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goto punt;
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else if (get_new_host(dev, FALSE))
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retries = 0;
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goto retry;
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}
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}
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/* Give it a shot - can't hurt to try and zoom in if we can, unless we get a hard error back that is! */
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i = FtpChdir(ftp, getenv(VAR_RELNAME));
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if (i == -2)
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goto punt;
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else if (i == -1)
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msgConfirm("Warning: Can't CD to `%s' distribution on this\n"
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"FTP server. You may need to visit the Options menu\n"
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"to set the release name explicitly if this FTP server\n"
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"isn't exporting a CD (or some other custom release) at\n"
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"the top level as a release tree.");
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if (isDebug())
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msgDebug("mediaInitFTP was successful (logged in and chdir'd)\n");
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ftpInitted = TRUE;
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return TRUE;
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punt:
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if (ftp != NULL) {
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FtpClose(ftp);
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ftp = NULL;
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}
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return FALSE;
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}
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int
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mediaGetFTP(Device *dev, char *file, Boolean probe)
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{
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int fd;
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int nretries;
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char *fp;
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char buf[PATH_MAX];
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fp = file;
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nretries = 0;
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lastRequest = file;
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while ((fd = FtpGet(ftp, fp)) < 0) {
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/* If a hard fail, try to "bounce" the ftp server to clear it */
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if (fd == -2 && ++nretries < atoi(variable_get(VAR_FTP_RETRIES))) {
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dev->shutdown(dev);
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/* If we can't re-initialize, just forget it */
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if (!dev->init(dev))
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return -2;
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}
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else if (probe || ftpShouldAbort(dev, ++nretries))
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return -1;
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else {
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/* Try some alternatives */
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switch (nretries) {
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case 1:
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sprintf(buf, "dists/%s", file);
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fp = buf;
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break;
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case 2:
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sprintf(buf, "%s/%s", variable_get(VAR_RELNAME), file);
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fp = buf;
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break;
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case 3:
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sprintf(buf, "%s/dists/%s", variable_get(VAR_RELNAME), file);
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fp = buf;
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break;
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case 4:
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fp = file;
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if (get_new_host(dev, probe)) {
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nretries = 0;
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continue;
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}
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else
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break;
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}
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}
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}
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return fd;
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}
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Boolean
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mediaCloseFTP(Device *dev, int fd)
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{
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if (isDebug())
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msgDebug("FTP Close called\n");
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if (ftp)
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FtpEOF(ftp);
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return FALSE;
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}
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void
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mediaShutdownFTP(Device *dev)
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{
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/* Device *netdev = (Device *)dev->private; */
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if (!ftpInitted)
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return;
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if (isDebug())
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msgDebug("FTP shutdown called. FTP = %x\n", ftp);
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if (ftp != NULL) {
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FtpClose(ftp);
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ftp = NULL;
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}
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/* (*netdev->shutdown)(netdev); */
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ftpInitted = FALSE;
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}
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