source: src/router/httpd/modules/upgrade_x86.c @ 15460

/*
 * Broadcom Home Gateway Reference Design
 * Web Page Configuration Support Routines
 *
 * Copyright 2001-2003, Broadcom Corporation
 * All Rights Reserved.
 * 
 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 * $Id: upgrade.c,v 1.4 2005/11/30 11:53:42 seg Exp $
 */

#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>

#include <broadcom.h>
#include <cyutils.h>

#define MIN_BUF_SIZE    4096
#define CODE_PATTERN_ERROR 9999
static int upgrade_ret;

static int getdiscindex(void)   // works only for squashfs 
{
        int i;

        for (i = 0; i < 10; i++) {
                char dev[64];

                sprintf(dev, "/dev/discs/disc%d/part2", i);
                FILE *in = fopen(dev, "rb");

                if (in == NULL)
                        continue;       // no second partition or disc does not
                // exist, skipping
                char buf[4];

                fread(buf, 4, 1, in);
                if (buf[0] == 'h' && buf[1] == 's' && buf[2] == 'q'
                    && buf[3] == 't') {
                        fclose(in);
                        // filesystem detected
                        return i;
                }
                fclose(in);
        }
        return -1;
}

void
// do_upgrade_cgi(char *url, FILE *stream)
do_upgrade_cgi(struct mime_handler *handler, char *url, webs_t stream, char *query)     // jimmy, https,
                                                        // 8/6/2003
{
#ifndef ANTI_FLASH
        fprintf(stderr, "do post\n");
        if (upgrade_ret)
                do_ej(handler, "Fail_u_s.asp", stream, NULL);
        else
                do_ej(handler, "Success_u_s.asp", stream, NULL);
        fprintf(stderr, "websdone\n");

        websDone(stream, 200);
        fprintf(stderr, "reboot\n");

        /*
         * Reboot if successful 
         */
        if (upgrade_ret == 0) {
                sleep(4);
                eval("umount", "/usr/local");
                sys_reboot();
        }
#else
        do_ej(handler, "Fail_u_s.asp", stream, NULL);
        websDone(stream, 200);
#endif
}

int
// sys_upgrade(char *url, FILE *stream, int *total)
sys_upgrade(char *url, webs_t stream, int *total, int type)     // jimmy,
                                                                // https,
                                                                // 8/6/2003
{
        lcdmessage("System Upgrade");
#ifndef ANTI_FLASH
        char upload_fifo[] = "/tmp/uploadXXXXXX";
        FILE *fifo = NULL;
        char *write_argv[4];
        pid_t pid;
        char *buf = NULL;
        int count, ret = 0;
        long flags = -1;
        int size = BUFSIZ;
        int i = 0;

        {
                write_argv[0] = "write";
                write_argv[1] = upload_fifo;
                write_argv[2] = "linux";
                write_argv[3] = NULL;
        }

        // diag_led(DIAG, START_LED); // blink the diag led
        C_led(1);
#ifdef HAVE_HTTPS
        if (do_ssl)
                ACTION("ACT_WEBS_UPGRADE");
        else
#endif
                ACTION("ACT_WEB_UPGRADE");

        /*
         * Feed write from a temporary FIFO 
         */
        if (!mktemp(upload_fifo) || !(fifo = fopen(upload_fifo, "w"))) {
                if (!ret)
                        ret = errno;
                goto err;
        }

        /*
         * Set nonblock on the socket so we can timeout 
         */

        /*
         ** The buffer must be at least as big as what the stream file is
         ** using so that it can read all the data that has been buffered
         ** in the stream file. Otherwise it would be out of sync with fn
         ** select specially at the end of the data stream in which case
         ** the select tells there is no more data available but there in
         ** fact is data buffered in the stream file's buffer. Since no
         ** one has changed the default stream file's buffer size, let's
         ** use the constant BUFSIZ until someone changes it.
         **/

        if (size < MIN_BUF_SIZE)
                size = MIN_BUF_SIZE;
        if ((buf = safe_malloc(size)) == NULL) {
                ret = ENOMEM;
                goto err;
        }

        /*
         * Pipe the rest to the FIFO 
         */
        cprintf("Upgrading\n");
        // while (total && *total)
        {
                wfread(&buf[0], 1, 5, stream);
                *total -= 5;
                if (buf[0] != 'W' || buf[1] != 'R' || buf[2] != 'A'
                    || buf[3] != 'P' || buf[4] != '1') {
                        ret = -1;
                        goto err;
                }
                int linuxsize;

                wfread(&linuxsize, 1, 4, stream);
                *total -= 4;
                safe_fwrite(&linuxsize, 1, 4, fifo);
                for (i = 0; i < linuxsize / MIN_BUF_SIZE; i++) {
                        wfread(&buf[0], 1, MIN_BUF_SIZE, stream);
                        fwrite(&buf[0], 1, MIN_BUF_SIZE, fifo);
                }

                wfread(&buf[0], 1, linuxsize % MIN_BUF_SIZE, stream);
                fwrite(&buf[0], 1, linuxsize % MIN_BUF_SIZE, fifo);
                *total -= linuxsize;

        }
        fclose(fifo);
        fifo = NULL;
        fifo = fopen(upload_fifo, "rb");
        unsigned long linuxsize;

        linuxsize = 0;
        linuxsize += getc(fifo);
        linuxsize += getc(fifo) * 256;
        linuxsize += getc(fifo) * 256 * 256;
        linuxsize += getc(fifo) * 256 * 256 * 256;
        char dev[128];

        // fprintf (stderr, "Write Linux %d to %s\n", linuxsize,dev);
        char drive[64];
        sprintf(drive, "/dev/discs/disc%d/disc", getdiscindex());
        //backup nvram
        fprintf(stderr, "backup nvram\n");
        FILE *in = fopen("/usr/local/nvram/nvram.bin", "rb");
        if (in) {
                char *mem = malloc(65536);
                fread(mem, 65536, 1, in);
                fclose(in);
                in = fopen(drive, "r+b");
                fseek(in, 0, SEEK_END);
                long mtdlen = ftell(in);
                fseek(in, mtdlen - (65536 * 2), SEEK_SET);
                fwrite(mem, 65536, 1, in);
                fclose(in);
                eval("sync");
                in = fopen(drive, "rb");
                fseek(in, mtdlen - (65536 * 2), SEEK_SET);
                fread(mem, 65536, 1, in);
                fclose(in);
                free(mem);
        }
        fprintf(stderr, "write system\n");
        FILE *out = fopen(drive, "r+b");
        char *flashbuf = (char *)malloc(linuxsize);
        if (!flashbuf)          // not enough memory, use direct way
        {
                for (i = 0; i < linuxsize; i++)
                        putc(getc(fifo), out);
        } else {
                //read into temp buffer
                fread(flashbuf, linuxsize, 1, fifo);
                fwrite(flashbuf, linuxsize, 1, out);
                free(flashbuf);
        }
        fclose(out);
        fprintf(stderr, "sync system\n");
        sysprintf("sync");
        sysprintf("sync");
        //reread for validation
        fprintf(stderr, "check system for validation\n");
        in = fopen(drive, "rb");
        for (i = 0; i < linuxsize; i++)
                getc(in);
        fclose(in);
        sysprintf("sync");
        /*
         * Wait for write to terminate 
         */
        // waitpid (pid, &ret, 0);
        cprintf("done\n");
        ret = 0;
err:
        if (buf)
                free(buf);
        if (fifo)
                fclose(fifo);
        unlink(upload_fifo);

        // diag_led(DIAG, STOP_LED);
        // C_led (0);
        fprintf(stderr, "Idle\n");
        ACTION("ACT_IDLE");

        return ret;
#else
        return 0;
#endif
}

void
// do_upgrade_post(char *url, FILE *stream, int len, char *boundary)
do_upgrade_post(char *url, webs_t stream, int len, char *boundary)      // jimmy, 
                                                                        // https, 
                                                                        // 8/6/2003
{

        killall("udhcpc", SIGKILL);
#ifndef ANTI_FLASH
        char buf[1024];
        int type = 0;

        upgrade_ret = EINVAL;

        // Let below files loaded to memory
        // To avoid the successful screen is blank after web upgrade.

        /*
         * Look for our part 
         */
        while (len > 0) {
                if (!wfgets(buf, MIN(len + 1, sizeof(buf)), stream))
                        return;
                len -= strlen(buf);
                if (!strncasecmp(buf, "Content-Disposition:", 20)) {
                        if (strstr(buf, "name=\"erase\"")) {
                                while (len > 0 && strcmp(buf, "\n")
                                       && strcmp(buf, "\r\n")) {
                                        if (!wfgets
                                            (buf, MIN(len + 1, sizeof(buf)),
                                             stream))
                                                return;
                                        len -= strlen(buf);
                                }
                                if (!wfgets
                                    (buf, MIN(len + 1, sizeof(buf)), stream))
                                        return;
                                len -= strlen(buf);
                                buf[1] = '\0';  // we only want the 1st digit
                                nvram_set("sv_restore_defaults", buf);
                                nvram_commit();
                        } else if (strstr(buf, "name=\"file\""))        // upgrade image
                        {
                                type = 0;
                                break;
                        }
                }
        }

        /*
         * Skip boundary and headers 
         */
        while (len > 0) {
                if (!wfgets(buf, MIN(len + 1, sizeof(buf)), stream))
                        return;
                len -= strlen(buf);
                if (!strcmp(buf, "\n") || !strcmp(buf, "\r\n"))
                        break;
        }
        upgrade_ret = sys_upgrade(NULL, stream, &len, type);
        fprintf(stderr, "core upgrade done() %d\n", len);
        /*
         * Restore factory original settings if told to. This will also cause a
         * restore defaults on reboot of a Sveasoft firmware. 
         */
        if (nvram_match("sv_restore_defaults", "1")) {
                system2("rm -f /usr/local/nvram/nvram.bin");
        }
        /*
         * Slurp anything remaining in the request 
         */
        while (len--) {
#ifdef HAVE_HTTPS
                if (do_ssl) {
                        wfgets(buf, 1, stream);
                } else {
                        (void)fgetc(stream);
                }
#else
                (void)fgetc(stream);
#endif

        }
#endif
        fprintf(stderr, "upgrade done()\n");

}