WebSVN – SvarDOS – Diff – /pkgnet/tags/20220215/pkgnet.c


/*
 * pkgnet - pulls SvarDOS packages from the project's online repository
 *
 * PUBLISHED UNDER THE TERMS OF THE MIT LICENSE
 *
 * COPYRIGHT (C) 2016-2022 MATEUSZ VISTE, ALL RIGHTS RESERVED.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * http://svardos.org
 */
 
#include <direct.h> /* opendir() and friends */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
 
#include "net.h"
#include "unchunk.h"
 
#include "svarlang.lib\svarlang.h"
 
#include "../../pkg/trunk/lsm.h"
 
 
#define PVER "20220215"
#define PDATE "2021-2022"
 
#define HOSTADDR "svardos.org"
 
 
/* convenience define that outputs nls strings to screen (followed by CR/LF) */
#define putsnls(x,y) puts(svarlang_strid((x << 8) | y))
 
 
/* returns length of all http headers, or 0 if uncomplete yet */
static unsigned short detecthttpheadersend(const unsigned char *buff) {
  char lastbyteislf = 0;
  unsigned short i;
  for (i = 0; buff[i] != 0; i++) {
    if (buff[i] == '\r') continue; /* ignore CR characters */
    if (buff[i] != '\n') {
      lastbyteislf = 0;
      continue;
    }
    /* cur byte is LF -> if last one was also LF then this is an empty line, meaning headers are over */
    if (lastbyteislf == 0) {
      lastbyteislf = 1;
      continue;
    }
    /* end of headers! return length of headers */
    return(i + 1); /* add 1 to skip the current \n character */
  }
  return(0);
}
 
 
static void help(void) {
  puts("pkgnet ver " PVER " -- Copyright (C) " PDATE " Mateusz Viste");
  puts("");
  putsnls(1, 0);  /* "pkgnet is the SvarDOS package downloader" */
  puts("");
  putsnls(1, 1);  /* "usage:  pkgnet search <term>" */
  putsnls(1, 2);  /* "        pkgnet pull <package>" */
  putsnls(1, 3);  /* "        pkgnet pull <package>-<version>" */
  putsnls(1, 6);  /* "        pkgnet checkup" */
  puts("");
  putsnls(1, 7);  /* "actions:" */
  puts("");
  putsnls(1, 8);  /* "search   - asks remote repository for the list of matching packages" */
  putsnls(1, 9);  /* "pull     - downloads package into current directory" */
  putsnls(1, 10); /* "checkup  - lists updates available for your system" */
  puts("");
  printf("Watt32 kernel: %s", net_engine());
  puts("");
}
 
 
/* parses command line arguments and fills outfname and url accordingly
 * returns 0 on success, non-zero otherwise */
static int parseargv(int argc, char * const *argv, char *outfname, char *url, int *ispost) {
  *outfname = 0;
  *url = 0;
  *ispost = 0;
  if ((argc == 3) && (strcasecmp(argv[1], "search") == 0)) {
    sprintf(url, "/repo/?a=search&p=%s", argv[2]);
  } else if ((argc == 3) && (strcasecmp(argv[1], "pull") == 0)) {
    unsigned short i;
    sprintf(url, "/repo/?a=pull&p=%s", argv[2]);
    /* copy argv[2] into outfname, but stop at first '-' or null terminator
     * this trims any '-version' part in filename to respect 8+3 */
    for (i = 0; (argv[2][i] != 0) && (argv[2][i] != '-') && (i < 8); i++) {
      outfname[i] = argv[2][i];
    }
    /* add the svp extension to filename */
    strcpy(outfname + i, ".svp");
  } else if ((argc == 2) && (strcasecmp(argv[1], "checkup") == 0)) {
    sprintf(url, "/repo/?a=checkup");
    *ispost = 1;
  } else {
    help();
    return(-1);
  }
  return(0);
}
 
 
static int htget_headers(unsigned char *buffer, size_t buffersz, struct net_tcpsocket *sock, int *httpcode, int *ischunked)  {
  unsigned char *buffptr = buffer;
  unsigned short bufflen = 0;
  int byteread;
  time_t starttime = time(NULL);
  for (;;) {
    byteread = net_recv(sock, buffptr, buffersz - (bufflen + 1)); /* -1 because I will append a NULL terminator */
 
    if (byteread > 0) { /* got data */
      int hdlen;
      bufflen += byteread;
      buffptr += byteread;
      buffer[bufflen] = 0;
      hdlen = detecthttpheadersend(buffer);
      if (hdlen > 0) { /* full headers - parse http code and continue processing */
        int i;
        buffer[hdlen - 1] = 0;
        /* find the first space (HTTP/1.1 200 OK) */
        for (i = 0; i < 16; i++) {
          if ((buffer[i] == ' ') || (buffer[i] == 0)) break;
        }
        if (buffer[i] != ' ') return(-1);
        *httpcode = atoi((char *)(buffer + i + 1));
        /* switch all headers to low-case so it is easier to parse them */
        for (i = 0; i < hdlen; i++) if ((buffer[i] >= 'A') && (buffer[i] <= 'Z')) buffer[i] += ('a' - 'A');
        /* look out for chunked transfer encoding */
        {
        char *lineptr = strstr((char *)buffer, "\ntransfer-encoding:");
        if (lineptr != NULL) {
          lineptr += 19;
          /* replace nearest \r, \n or 0 by 0 */
          for (i = 0; ; i++) {
            if ((lineptr[i] == '\r') || (lineptr[i] == '\n') || (lineptr[i] == 0)) {
              lineptr[i] = 0;
              break;
            }
          }
          /* do I see the 'chunked' word? */
          if (strstr((char *)lineptr, "chunked") != NULL) *ischunked = 1;
        }
        }
        /* rewind the buffer */
        bufflen -= hdlen;
        memmove(buffer, buffer + hdlen, bufflen);
        return(bufflen); /* move to body processing now */
      }
 
    } else if (byteread < 0) { /* abort on error */
      return(-2); /* unexpected end of connection (while waiting for all http headers) */
 
    } else { /* else no data received - look for timeout and release a cpu cycle */
      if (time(NULL) - starttime > 20) return(-3); /* TIMEOUT! */
      _asm int 28h; /* release a CPU cycle */
    }
  }
}
 
 
/* provides body data of the POST query for checkup actions
   fills buff with data and returns data length.
   must be called repeateadly until zero-lengh is returned */
static unsigned short checkupdata(char *buff) {
  static char *dosdir = NULL;
  static DIR *dp;
  static struct dirent *ep;
 
  /* make sure I know %DOSDIR% */
  if (dosdir == NULL) {
    dosdir = getenv("DOSDIR");
    if ((dosdir == NULL) || (dosdir[0] == 0)) {
      putsnls(9, 0); /* "ERROR: %DOSDIR% not set" */
      return(0);
    }
  }
 
  /* if first call, open the package directory */
  if (dp == NULL) {
    sprintf(buff, "%s\\packages", dosdir);
    dp = opendir(buff);
    if (dp == NULL) {
      putsnls(9, 1); /* "ERROR: Could not access %DOSDIR%\\packages directory" */
      return(0);
    }
  }
 
  for (;;) {
    int tlen;
    char ver[20];
    ep = readdir(dp);   /* readdir() result must never be freed (statically allocated) */
    if (ep == NULL) {   /* no more entries */
      closedir(dp);
      return(0);
    }
 
    tlen = strlen(ep->d_name);
    if (tlen < 4) continue; /* files must be at least 5 bytes long ("x.lst") */
    if (strcasecmp(ep->d_name + tlen - 4, ".lst") != 0) continue;  /* if not an .lst file, skip it silently */
    ep->d_name[tlen - 4] = 0; /* trim out the ".lst" suffix */
 
    /* load the metadata from %DOSDIR\APPINFO\*.lsm */
    sprintf(buff, "%s\\appinfo\\%s.lsm", dosdir, ep->d_name);
    readlsm(buff, ver, sizeof(ver));
 
    return(sprintf(buff, "%s\t%s\n", ep->d_name, ver));
  }
}
 
 
/* fetch http data from ipaddr using url
 * write result to file outfname if not null, or print to stdout otherwise
 * fills bsum with the BSD sum of the data
 * is ispost is non-zero, then the request is a POST and its body data is
 * obtained through repeated calls to checkupdata()
 * returns the length of data obtained, or neg value on error */
static long htget(const char *ipaddr, const char *url, const char *outfname, unsigned short *bsum, int ispost, unsigned char *buffer, size_t buffersz) {
  struct net_tcpsocket *sock;
  time_t lastactivity, lastprogressoutput = 0;
  int httpcode = -1, ischunked = 0;
  int byteread;
  long flen = 0, lastflen = 0;
  FILE *fd = NULL;
 
  /* unchunk state variable is using a little part of the supplied buffer */
  struct unchunk_state *unchstate = (void *)buffer;
  buffer += sizeof(*unchstate);
  buffersz -= sizeof(*unchstate);
  memset(unchstate, 0, sizeof(*unchstate));
 
  sock = net_connect(ipaddr, 80);
  if (sock == NULL) {
    printf(svarlang_strid(0x0902), HOSTADDR); /* "ERROR: failed to connect to " HOSTADDR */
    puts("");
    goto SHITQUIT;
  }
 
  /* wait for net_connect() to actually connect */
  for (;;) {
    int connstate = net_isconnected(sock);
    if (connstate > 0) break;
    if (connstate < 0) {
      printf(svarlang_strid(0x0902), HOSTADDR); /* "ERROR: failed to connect to " HOSTADDR */
      puts("");
      goto SHITQUIT;
    }
    _asm int 28h;  /* DOS idle */
  }
 
  /* socket is connected - send the http request (MUST be HTTP/1.0 because I do not support chunked transfers!) */
  if (ispost) {
    snprintf((char *)buffer, buffersz, "POST %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet/" PVER "\r\nTransfer-Encoding: chunked\r\nConnection: close\r\n\r\n", url);
  } else {
    snprintf((char *)buffer, buffersz, "GET %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet/" PVER "\r\nConnection: close\r\n\r\n", url);
  }
 
  if (net_send(sock, buffer, strlen((char *)buffer)) != (int)strlen((char *)buffer)) {
    putsnls(9, 3); /* "ERROR: failed to send a HTTP query to remote server" */
    goto SHITQUIT;
  }
 
  /* send chunked data for POST queries */
  if (ispost) {
    unsigned short blen;
    int hlen;
    char *hbuf = (char *)buffer + buffersz - 16;
    do {
      blen = checkupdata((char *)buffer);
      if (blen == 0) { /* last item contains the message trailer */
        hlen = sprintf(hbuf, "0\r\n");
      } else {
        hlen = sprintf(hbuf, "%X\r\n", blen);
      }
      if (net_send(sock, hbuf, hlen) != hlen) {
        putsnls(9, 4); /* "ERROR: failed to send POST data to remote server" */
        goto SHITQUIT;
      }
      /* add trailing CR/LF to buffer as required by chunked mode */
      buffer[blen++] = '\r';
      buffer[blen++] = '\n';
      if (net_send(sock, buffer, blen) != blen) {
        putsnls(9, 4); /* "ERROR: failed to send POST data to remote server" */
        goto SHITQUIT;
      }
    } while (blen != 2);
  }
 
  /* receive and process HTTP headers */
  byteread = htget_headers(buffer, buffersz, sock, &httpcode, &ischunked);
 
  /* transmission error? */
  if (byteread < 0) {
    printf(svarlang_strid(0x0905), byteread); /* "ERROR: TCP communication error #%d" */
    puts("");
    goto SHITQUIT;
  }
 
  /* open destination file if required and if no server-side error occured */
  if ((httpcode >= 200) && (httpcode <= 299) && (*outfname != 0)) {
    fd = fopen(outfname, "wb");
    if (fd == NULL) {
      printf(svarlang_strid(0x0906), outfname); /* "ERROR: failed to create file %s" */
      puts("");
      goto SHITQUIT;
    }
  }
 
  /* read body of the answer (and chunk-decode it if needed) */
  lastactivity = time(NULL);
  for (;; byteread = net_recv(sock, buffer, buffersz - 1)) { /* read 1 byte less because I need to append a NULL terminator when printf'ing the content */
 
    if (byteread > 0) { /* got data */
      lastactivity = time(NULL);
 
      /* unpack data if server transmits in chunked mode */
      if (ischunked) byteread = unchunk(buffer, byteread, unchstate);
 
      /* if downloading to file, write stuff to disk */
      if (fd != NULL) {
        int i;
        if (fwrite(buffer, 1, byteread, fd) != byteread) {
          printf(svarlang_strid(0x0907), outfname, flen); /* "ERROR: failed to write data to file %s after %ld bytes" */
          puts("");
          break;
        }
        flen += byteread;
        /* update progress once a sec */
        if (lastprogressoutput != lastactivity) {
          lastprogressoutput = lastactivity;
          printf("%ld KiB (%ld KiB/s)     \r", flen >> 10, (flen >> 10) - (lastflen >> 10)); /* trailing spaces are meant to avoid leaving garbage on screen if speed goes from, say, 1000 KiB/s to 9 KiB/s */
          lastflen = flen;
          fflush(stdout); /* avoid console buffering */
        }
        /* update the bsd sum */
        for (i = 0; i < byteread; i++) {
          /* rotr16 */
          unsigned short bsumlsb = *bsum & 1;
          *bsum >>= 1;
          *bsum |= (bsumlsb << 15);
          *bsum += buffer[i];
        }
      } else { /* otherwise dump to screen */
        buffer[byteread] = 0;
        printf("%s", buffer);
      }
 
    } else if (byteread < 0) { /* end of connection */
      break;
 
    } else { /* check for timeout (byteread == 0) */
      if (time(NULL) - lastactivity > 20) { /* TIMEOUT! */
        putsnls(9, 8); /* "ERROR: Timeout while waiting for data" */
        goto SHITQUIT;
      }
      /* waiting for packets - release a CPU cycle in the meantime */
      _asm int 28h;
    }
  }
 
  goto ALLGOOD;
 
  SHITQUIT:
  flen = -1;
 
  ALLGOOD:
  if (fd != NULL) fclose(fd);
  net_close(sock);
  return(flen);
}
 
 
/* checks if file exists, returns 0 if not, non-zero otherwise */
static int fexists(const char *fname) {
  FILE *fd = fopen(fname, "rb");
  if (fd == NULL) return(0);
  fclose(fd);
  return(1);
}
 
 
int main(int argc, char **argv) {
  unsigned short bsum = 0;
  long flen;
  int ispost; /* is the request a POST? */
 
  struct {
    unsigned char buffer[5000];
    char ipaddr[64];
    char url[64];
    char outfname[16];
  } *mem;
 
  svarlang_autoload("PKGNET");
 
  /* allocate memory */
  mem = malloc(sizeof(*mem));
  if (mem == NULL) {
    putsnls(9, 9); /* "ERROR: out of memory" */
    return(1);
  }
 
  /* parse command line arguments */
  if (parseargv(argc, argv, mem->outfname, mem->url, &ispost) != 0) return(1);
 
  /* if outfname requested, make sure that file does not exist yet */
  if ((mem->outfname[0] != 0) && (fexists(mem->outfname))) {
    printf(svarlang_strid(0x090A), mem->outfname); /* "ERROR: file %s already exists" */
    puts("");
    return(1);
  }
 
  /* init network stack */
  if (net_init() != 0) {
    putsnls(9, 11); /* "ERROR: Network subsystem initialization failed" */
    return(1);
  }
 
  puts(""); /* required because watt-32 likes to print out garbage sometimes ("configuring through DHCP...") */
 
  if (net_dnsresolve(mem->ipaddr, HOSTADDR) != 0) {
    putsnls(9, 12); /* "ERROR: DNS resolution failed" */
    return(1);
  }
 
  flen = htget(mem->ipaddr, mem->url, mem->outfname, &bsum, ispost, mem->buffer, sizeof(mem->buffer));
  if (flen < 1) return(1);
 
  if (mem->outfname[0] != 0) {
    /* print bsum, size, filename */
    printf(svarlang_strid(0x0200), flen >> 10, mem->outfname, bsum); /* Downloaded %ld KiB into %s (BSUM: %04X) */
    puts("");
  }
 
  return(0);
}
 

Rev 712	Rev 715
1	`/*`	1	`/*`
2	`* pkgnet - pulls SvarDOS packages from the project's online repository`	2	`* pkgnet - pulls SvarDOS packages from the project's online repository`
3	`*`	3	`*`
4	`* PUBLISHED UNDER THE TERMS OF THE MIT LICENSE`	4	`* PUBLISHED UNDER THE TERMS OF THE MIT LICENSE`
5	`*`	5	`*`
6	`* COPYRIGHT (C) 2016-2022 MATEUSZ VISTE, ALL RIGHTS RESERVED.`	6	`* COPYRIGHT (C) 2016-2022 MATEUSZ VISTE, ALL RIGHTS RESERVED.`
7	`*`	7	`*`
8	`* Permission is hereby granted, free of charge, to any person obtaining a`	8	`* Permission is hereby granted, free of charge, to any person obtaining a`
9	`* copy of this software and associated documentation files (the "Software"),`	9	`* copy of this software and associated documentation files (the "Software"),`
10	`* to deal in the Software without restriction, including without limitation`	10	`* to deal in the Software without restriction, including without limitation`
11	`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`	11	`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`
12	`* and/or sell copies of the Software, and to permit persons to whom the`	12	`* and/or sell copies of the Software, and to permit persons to whom the`
13	`* Software is furnished to do so, subject to the following conditions:`	13	`* Software is furnished to do so, subject to the following conditions:`
14	`*`	14	`*`
15	`* The above copyright notice and this permission notice shall be included in`	15	`* The above copyright notice and this permission notice shall be included in`
16	`* all copies or substantial portions of the Software.`	16	`* all copies or substantial portions of the Software.`
17	`*`	17	`*`
18	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`	18	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`
19	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`	19	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`
20	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`	20	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`
21	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`	21	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`
22	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`	22	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`
23	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER`	23	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER`
24	`* DEALINGS IN THE SOFTWARE.`	24	`* DEALINGS IN THE SOFTWARE.`
25	`*`	25	`*`
26	`* http://svardos.org`	26	`* http://svardos.org`
27	`*/`	27	`*/`
28		28
29	`#include <direct.h> /* opendir() and friends */`	29	`#include <direct.h> /* opendir() and friends */`
30	`#include <stdio.h>`	30	`#include <stdio.h>`
31	`#include <stdlib.h>`	31	`#include <stdlib.h>`
32	`#include <string.h>`	32	`#include <string.h>`
33	`#include <time.h>`	33	`#include <time.h>`
34		34
35	`#include "net.h"`	35	`#include "net.h"`
36	`#include "unchunk.h"`	36	`#include "unchunk.h"`
37		37
38	`#include "svarlang.lib\svarlang.h"`	38	`#include "svarlang.lib\svarlang.h"`
39		39
40	`#include "../../pkg/trunk/lsm.h"`	40	`#include "../../pkg/trunk/lsm.h"`
41		41
42		42
43	`#define PVER "20220215"`	43	`#define PVER "20220215"`
44	`#define PDATE "2021-2022"`	44	`#define PDATE "2021-2022"`
45		45
46	`#define HOSTADDR "svardos.org"`	46	`#define HOSTADDR "svardos.org"`
47		47
48		48
49	`/* convenience define that outputs nls strings to screen (followed by CR/LF) */`	49	`/* convenience define that outputs nls strings to screen (followed by CR/LF) */`
50	`#define putsnls(x,y) puts(svarlang_strid((x << 8) \| y))`	50	`#define putsnls(x,y) puts(svarlang_strid((x << 8) \| y))`
51		51
52		52
53	`/* returns length of all http headers, or 0 if uncomplete yet */`	53	`/* returns length of all http headers, or 0 if uncomplete yet */`
54	`static unsigned short detecthttpheadersend(const unsigned char *buff) {`	54	`static unsigned short detecthttpheadersend(const unsigned char *buff) {`
55	`char lastbyteislf = 0;`	55	`char lastbyteislf = 0;`
56	`unsigned short i;`	56	`unsigned short i;`
57	`for (i = 0; buff[i] != 0; i++) {`	57	`for (i = 0; buff[i] != 0; i++) {`
58	`if (buff[i] == '\r') continue; /* ignore CR characters */`	58	`if (buff[i] == '\r') continue; /* ignore CR characters */`
59	`if (buff[i] != '\n') {`	59	`if (buff[i] != '\n') {`
60	`lastbyteislf = 0;`	60	`lastbyteislf = 0;`
61	`continue;`	61	`continue;`
62	`}`	62	`}`
63	`/* cur byte is LF -> if last one was also LF then this is an empty line, meaning headers are over */`	63	`/* cur byte is LF -> if last one was also LF then this is an empty line, meaning headers are over */`
64	`if (lastbyteislf == 0) {`	64	`if (lastbyteislf == 0) {`
65	`lastbyteislf = 1;`	65	`lastbyteislf = 1;`
66	`continue;`	66	`continue;`
67	`}`	67	`}`
68	`/* end of headers! return length of headers */`	68	`/* end of headers! return length of headers */`
69	`return(i + 1); /* add 1 to skip the current \n character */`	69	`return(i + 1); /* add 1 to skip the current \n character */`
70	`}`	70	`}`
71	`return(0);`	71	`return(0);`
72	`}`	72	`}`
73		73
74		74
75	`static void help(void) {`	75	`static void help(void) {`
76	`puts("pkgnet ver " PVER " -- Copyright (C) " PDATE " Mateusz Viste");`	76	`puts("pkgnet ver " PVER " -- Copyright (C) " PDATE " Mateusz Viste");`
77	`puts("");`	77	`puts("");`
78	`putsnls(1, 0); /* "pkgnet is the SvarDOS package downloader" */`	78	`putsnls(1, 0); /* "pkgnet is the SvarDOS package downloader" */`
79	`puts("");`	79	`puts("");`
80	`putsnls(1, 1); /* "usage: pkgnet search <term>" */`	80	`putsnls(1, 1); /* "usage: pkgnet search <term>" */`
81	`putsnls(1, 2); /* " pkgnet pull <package>" */`	81	`putsnls(1, 2); /* " pkgnet pull <package>" */`
82	`putsnls(1, 3); /* " pkgnet pull <package>-<version>" */`	82	`putsnls(1, 3); /* " pkgnet pull <package>-<version>" */`
83	`putsnls(1, 6); /* " pkgnet checkup" */`	83	`putsnls(1, 6); /* " pkgnet checkup" */`
84	`puts("");`	84	`puts("");`
85	`putsnls(1, 7); /* "actions:" */`	85	`putsnls(1, 7); /* "actions:" */`
86	`puts("");`	86	`puts("");`
87	`putsnls(1, 8); /* "search - asks remote repository for the list of matching packages" */`	87	`putsnls(1, 8); /* "search - asks remote repository for the list of matching packages" */`
88	`putsnls(1, 9); /* "pull - downloads package into current directory" */`	88	`putsnls(1, 9); /* "pull - downloads package into current directory" */`
89	`putsnls(1, 10); /* "checkup - lists updates available for your system" */`	89	`putsnls(1, 10); /* "checkup - lists updates available for your system" */`
90	`puts("");`	90	`puts("");`
91	`printf("Watt32 kernel: %s", net_engine());`	91	`printf("Watt32 kernel: %s", net_engine());`
92	`puts("");`	92	`puts("");`
93	`}`	93	`}`
94		94
95		95
96	`/* parses command line arguments and fills outfname and url accordingly`	96	`/* parses command line arguments and fills outfname and url accordingly`
97	`* returns 0 on success, non-zero otherwise */`	97	`* returns 0 on success, non-zero otherwise */`
98	`static int parseargv(int argc, char * const argv, char outfname, char url, int ispost) {`	98	`static int parseargv(int argc, char * const argv, char outfname, char url, int ispost) {`
99	`*outfname = 0;`	99	`*outfname = 0;`
100	`*url = 0;`	100	`*url = 0;`
101	`*ispost = 0;`	101	`*ispost = 0;`
102	`if ((argc == 3) && (strcasecmp(argv[1], "search") == 0)) {`	102	`if ((argc == 3) && (strcasecmp(argv[1], "search") == 0)) {`
103	`sprintf(url, "/repo/?a=search&p=%s", argv[2]);`	103	`sprintf(url, "/repo/?a=search&p=%s", argv[2]);`
104	`} else if ((argc == 3) && (strcasecmp(argv[1], "pull") == 0)) {`	104	`} else if ((argc == 3) && (strcasecmp(argv[1], "pull") == 0)) {`
105	`unsigned short i;`	105	`unsigned short i;`
106	`sprintf(url, "/repo/?a=pull&p=%s", argv[2]);`	106	`sprintf(url, "/repo/?a=pull&p=%s", argv[2]);`
107	`/* copy argv[2] into outfname, but stop at first '-' or null terminator`	107	`/* copy argv[2] into outfname, but stop at first '-' or null terminator`
108	`* this trims any '-version' part in filename to respect 8+3 */`	108	`* this trims any '-version' part in filename to respect 8+3 */`
109	`for (i = 0; (argv[2][i] != 0) && (argv[2][i] != '-') && (i < 8); i++) {`	109	`for (i = 0; (argv[2][i] != 0) && (argv[2][i] != '-') && (i < 8); i++) {`
110	`outfname[i] = argv[2][i];`	110	`outfname[i] = argv[2][i];`
111	`}`	111	`}`
112	`/* add the svp extension to filename */`	112	`/* add the svp extension to filename */`
113	`strcpy(outfname + i, ".svp");`	113	`strcpy(outfname + i, ".svp");`
114	`} else if ((argc == 2) && (strcasecmp(argv[1], "checkup") == 0)) {`	114	`} else if ((argc == 2) && (strcasecmp(argv[1], "checkup") == 0)) {`
115	`sprintf(url, "/repo/?a=checkup");`	115	`sprintf(url, "/repo/?a=checkup");`
116	`*ispost = 1;`	116	`*ispost = 1;`
117	`} else {`	117	`} else {`
118	`help();`	118	`help();`
119	`return(-1);`	119	`return(-1);`
120	`}`	120	`}`
121	`return(0);`	121	`return(0);`
122	`}`	122	`}`
123		123
124		124
125	`static int htget_headers(unsigned char buffer, size_t buffersz, struct net_tcpsocket sock, int httpcode, int ischunked) {`	125	`static int htget_headers(unsigned char buffer, size_t buffersz, struct net_tcpsocket sock, int httpcode, int ischunked) {`
126	`unsigned char *buffptr = buffer;`	126	`unsigned char *buffptr = buffer;`
127	`unsigned short bufflen = 0;`	127	`unsigned short bufflen = 0;`
128	`int byteread;`	128	`int byteread;`
129	`time_t starttime = time(NULL);`	129	`time_t starttime = time(NULL);`
130	`for (;;) {`	130	`for (;;) {`
131	`byteread = net_recv(sock, buffptr, buffersz - (bufflen + 1)); /* -1 because I will append a NULL terminator */`	131	`byteread = net_recv(sock, buffptr, buffersz - (bufflen + 1)); /* -1 because I will append a NULL terminator */`
132		132
133	`if (byteread > 0) { /* got data */`	133	`if (byteread > 0) { /* got data */`
134	`int hdlen;`	134	`int hdlen;`
135	`bufflen += byteread;`	135	`bufflen += byteread;`
136	`buffptr += byteread;`	136	`buffptr += byteread;`
137	`buffer[bufflen] = 0;`	137	`buffer[bufflen] = 0;`
138	`hdlen = detecthttpheadersend(buffer);`	138	`hdlen = detecthttpheadersend(buffer);`
139	`if (hdlen > 0) { /* full headers - parse http code and continue processing */`	139	`if (hdlen > 0) { /* full headers - parse http code and continue processing */`
140	`int i;`	140	`int i;`
141	`buffer[hdlen - 1] = 0;`	141	`buffer[hdlen - 1] = 0;`
142	`/* find the first space (HTTP/1.1 200 OK) */`	142	`/* find the first space (HTTP/1.1 200 OK) */`
143	`for (i = 0; i < 16; i++) {`	143	`for (i = 0; i < 16; i++) {`
144	`if ((buffer[i] == ' ') \|\| (buffer[i] == 0)) break;`	144	`if ((buffer[i] == ' ') \|\| (buffer[i] == 0)) break;`
145	`}`	145	`}`
146	`if (buffer[i] != ' ') return(-1);`	146	`if (buffer[i] != ' ') return(-1);`
147	`httpcode = atoi((char )(buffer + i + 1));`	147	`httpcode = atoi((char )(buffer + i + 1));`
148	`/* switch all headers to low-case so it is easier to parse them */`	148	`/* switch all headers to low-case so it is easier to parse them */`
149	`for (i = 0; i < hdlen; i++) if ((buffer[i] >= 'A') && (buffer[i] <= 'Z')) buffer[i] += ('a' - 'A');`	149	`for (i = 0; i < hdlen; i++) if ((buffer[i] >= 'A') && (buffer[i] <= 'Z')) buffer[i] += ('a' - 'A');`
150	`/* look out for chunked transfer encoding */`	150	`/* look out for chunked transfer encoding */`
151	`{`	151	`{`
152	`char lineptr = strstr((char )buffer, "\ntransfer-encoding:");`	152	`char lineptr = strstr((char )buffer, "\ntransfer-encoding:");`
153	`if (lineptr != NULL) {`	153	`if (lineptr != NULL) {`
154	`lineptr += 19;`	154	`lineptr += 19;`
155	`/* replace nearest \r, \n or 0 by 0 */`	155	`/* replace nearest \r, \n or 0 by 0 */`
156	`for (i = 0; ; i++) {`	156	`for (i = 0; ; i++) {`
157	`if ((lineptr[i] == '\r') \|\| (lineptr[i] == '\n') \|\| (lineptr[i] == 0)) {`	157	`if ((lineptr[i] == '\r') \|\| (lineptr[i] == '\n') \|\| (lineptr[i] == 0)) {`
158	`lineptr[i] = 0;`	158	`lineptr[i] = 0;`
159	`break;`	159	`break;`
160	`}`	160	`}`
161	`}`	161	`}`
162	`/* do I see the 'chunked' word? */`	162	`/* do I see the 'chunked' word? */`
163	`if (strstr((char )lineptr, "chunked") != NULL) ischunked = 1;`	163	`if (strstr((char )lineptr, "chunked") != NULL) ischunked = 1;`
164	`}`	164	`}`
165	`}`	165	`}`
166	`/* rewind the buffer */`	166	`/* rewind the buffer */`
167	`bufflen -= hdlen;`	167	`bufflen -= hdlen;`
168	`memmove(buffer, buffer + hdlen, bufflen);`	168	`memmove(buffer, buffer + hdlen, bufflen);`
169	`return(bufflen); /* move to body processing now */`	169	`return(bufflen); /* move to body processing now */`
170	`}`	170	`}`
171		171
172	`} else if (byteread < 0) { /* abort on error */`	172	`} else if (byteread < 0) { /* abort on error */`
173	`return(-2); /* unexpected end of connection (while waiting for all http headers) */`	173	`return(-2); /* unexpected end of connection (while waiting for all http headers) */`
174		174
175	`} else { /* else no data received - look for timeout and release a cpu cycle */`	175	`} else { /* else no data received - look for timeout and release a cpu cycle */`
176	`if (time(NULL) - starttime > 20) return(-3); /* TIMEOUT! */`	176	`if (time(NULL) - starttime > 20) return(-3); /* TIMEOUT! */`
177	`_asm int 28h; /* release a CPU cycle */`	177	`_asm int 28h; /* release a CPU cycle */`
178	`}`	178	`}`
179	`}`	179	`}`
180	`}`	180	`}`
181		181
182		182
183	`/* provides body data of the POST query for checkup actions`	183	`/* provides body data of the POST query for checkup actions`
184	`fills buff with data and returns data length.`	184	`fills buff with data and returns data length.`
185	`must be called repeateadly until zero-lengh is returned */`	185	`must be called repeateadly until zero-lengh is returned */`
186	`static unsigned short checkupdata(char *buff) {`	186	`static unsigned short checkupdata(char *buff) {`
187	`static char *dosdir = NULL;`	187	`static char *dosdir = NULL;`
188	`static DIR *dp;`	188	`static DIR *dp;`
189	`static struct dirent *ep;`	189	`static struct dirent *ep;`
190		190
191	`/* make sure I know %DOSDIR% */`	191	`/* make sure I know %DOSDIR% */`
192	`if (dosdir == NULL) {`	192	`if (dosdir == NULL) {`
193	`dosdir = getenv("DOSDIR");`	193	`dosdir = getenv("DOSDIR");`
194	`if ((dosdir == NULL) \|\| (dosdir[0] == 0)) {`	194	`if ((dosdir == NULL) \|\| (dosdir[0] == 0)) {`
195	`putsnls(9, 0); /* "ERROR: %DOSDIR% not set" */`	195	`putsnls(9, 0); /* "ERROR: %DOSDIR% not set" */`
196	`return(0);`	196	`return(0);`
197	`}`	197	`}`
198	`}`	198	`}`
199		199
200	`/* if first call, open the package directory */`	200	`/* if first call, open the package directory */`
201	`if (dp == NULL) {`	201	`if (dp == NULL) {`
202	`sprintf(buff, "%s\\packages", dosdir);`	202	`sprintf(buff, "%s\\packages", dosdir);`
203	`dp = opendir(buff);`	203	`dp = opendir(buff);`
204	`if (dp == NULL) {`	204	`if (dp == NULL) {`
205	`putsnls(9, 1); /* "ERROR: Could not access %DOSDIR%\\packages directory" */`	205	`putsnls(9, 1); /* "ERROR: Could not access %DOSDIR%\\packages directory" */`
206	`return(0);`	206	`return(0);`
207	`}`	207	`}`
208	`}`	208	`}`
209		209
210	`for (;;) {`	210	`for (;;) {`
211	`int tlen;`	211	`int tlen;`
212	`char ver[20];`	212	`char ver[20];`
213	`ep = readdir(dp); /* readdir() result must never be freed (statically allocated) */`	213	`ep = readdir(dp); /* readdir() result must never be freed (statically allocated) */`
214	`if (ep == NULL) { /* no more entries */`	214	`if (ep == NULL) { /* no more entries */`
215	`closedir(dp);`	215	`closedir(dp);`
216	`return(0);`	216	`return(0);`
217	`}`	217	`}`
218		218
219	`tlen = strlen(ep->d_name);`	219	`tlen = strlen(ep->d_name);`
220	`if (tlen < 4) continue; /* files must be at least 5 bytes long ("x.lst") */`	220	`if (tlen < 4) continue; /* files must be at least 5 bytes long ("x.lst") */`
221	`if (strcasecmp(ep->d_name + tlen - 4, ".lst") != 0) continue; /* if not an .lst file, skip it silently */`	221	`if (strcasecmp(ep->d_name + tlen - 4, ".lst") != 0) continue; /* if not an .lst file, skip it silently */`
222	`ep->d_name[tlen - 4] = 0; /* trim out the ".lst" suffix */`	222	`ep->d_name[tlen - 4] = 0; /* trim out the ".lst" suffix */`
223		223
224	`/* load the metadata from %DOSDIR\APPINFO\.lsm /`	224	`/* load the metadata from %DOSDIR\APPINFO\.lsm /`
225	`sprintf(buff, "%s\\appinfo\\%s.lsm", dosdir, ep->d_name);`	225	`sprintf(buff, "%s\\appinfo\\%s.lsm", dosdir, ep->d_name);`
226	`readlsm(buff, ver, sizeof(ver));`	226	`readlsm(buff, ver, sizeof(ver));`
227		227
228	`return(sprintf(buff, "%s\t%s\n", ep->d_name, ver));`	228	`return(sprintf(buff, "%s\t%s\n", ep->d_name, ver));`
229	`}`	229	`}`
230	`}`	230	`}`
231		231
232		232
233	`/* fetch http data from ipaddr using url`	233	`/* fetch http data from ipaddr using url`
234	`* write result to file outfname if not null, or print to stdout otherwise`	234	`* write result to file outfname if not null, or print to stdout otherwise`
235	`* fills bsum with the BSD sum of the data`	235	`* fills bsum with the BSD sum of the data`
236	`* is ispost is non-zero, then the request is a POST and its body data is`	236	`* is ispost is non-zero, then the request is a POST and its body data is`
237	`* obtained through repeated calls to checkupdata()`	237	`* obtained through repeated calls to checkupdata()`
238	`* returns the length of data obtained, or neg value on error */`	238	`* returns the length of data obtained, or neg value on error */`
239	`static long htget(const char ipaddr, const char url, const char outfname, unsigned short bsum, int ispost, unsigned char *buffer, size_t buffersz) {`	239	`static long htget(const char ipaddr, const char url, const char outfname, unsigned short bsum, int ispost, unsigned char *buffer, size_t buffersz) {`
240	`struct net_tcpsocket *sock;`	240	`struct net_tcpsocket *sock;`
241	`time_t lastactivity, lastprogressoutput = 0;`	241	`time_t lastactivity, lastprogressoutput = 0;`
242	`int httpcode = -1, ischunked = 0;`	242	`int httpcode = -1, ischunked = 0;`
243	`int byteread;`	243	`int byteread;`
244	`long flen = 0, lastflen = 0;`	244	`long flen = 0, lastflen = 0;`
245	`FILE *fd = NULL;`	245	`FILE *fd = NULL;`
246		246
247	`/* unchunk state variable is using a little part of the supplied buffer */`	247	`/* unchunk state variable is using a little part of the supplied buffer */`
248	`struct unchunk_state unchstate = (void )buffer;`	248	`struct unchunk_state unchstate = (void )buffer;`
249	`buffer += sizeof(*unchstate);`	249	`buffer += sizeof(*unchstate);`
250	`buffersz -= sizeof(*unchstate);`	250	`buffersz -= sizeof(*unchstate);`
251	`memset(unchstate, 0, sizeof(*unchstate));`	251	`memset(unchstate, 0, sizeof(*unchstate));`
252		252
253	`sock = net_connect(ipaddr, 80);`	253	`sock = net_connect(ipaddr, 80);`
254	`if (sock == NULL) {`	254	`if (sock == NULL) {`
255	`printf(svarlang_strid(0x0902), HOSTADDR); /* "ERROR: failed to connect to " HOSTADDR */`	255	`printf(svarlang_strid(0x0902), HOSTADDR); /* "ERROR: failed to connect to " HOSTADDR */`
256	`puts("");`	256	`puts("");`
257	`goto SHITQUIT;`	257	`goto SHITQUIT;`
258	`}`	258	`}`
259		259
260	`/* wait for net_connect() to actually connect */`	260	`/* wait for net_connect() to actually connect */`
261	`for (;;) {`	261	`for (;;) {`
262	`int connstate = net_isconnected(sock);`	262	`int connstate = net_isconnected(sock);`
263	`if (connstate > 0) break;`	263	`if (connstate > 0) break;`
264	`if (connstate < 0) {`	264	`if (connstate < 0) {`
265	`printf(svarlang_strid(0x0902), HOSTADDR); /* "ERROR: failed to connect to " HOSTADDR */`	265	`printf(svarlang_strid(0x0902), HOSTADDR); /* "ERROR: failed to connect to " HOSTADDR */`
266	`puts("");`	266	`puts("");`
267	`goto SHITQUIT;`	267	`goto SHITQUIT;`
268	`}`	268	`}`
269	`_asm int 28h; /* DOS idle */`	269	`_asm int 28h; /* DOS idle */`
270	`}`	270	`}`
271		271
272	`/* socket is connected - send the http request (MUST be HTTP/1.0 because I do not support chunked transfers!) */`	272	`/* socket is connected - send the http request (MUST be HTTP/1.0 because I do not support chunked transfers!) */`
273	`if (ispost) {`	273	`if (ispost) {`
274	`snprintf((char *)buffer, buffersz, "POST %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet/" PVER "\r\nTransfer-Encoding: chunked\r\nConnection: close\r\n\r\n", url);`	274	`snprintf((char *)buffer, buffersz, "POST %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet/" PVER "\r\nTransfer-Encoding: chunked\r\nConnection: close\r\n\r\n", url);`
275	`} else {`	275	`} else {`
276	`snprintf((char *)buffer, buffersz, "GET %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet/" PVER "\r\nConnection: close\r\n\r\n", url);`	276	`snprintf((char *)buffer, buffersz, "GET %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet/" PVER "\r\nConnection: close\r\n\r\n", url);`
277	`}`	277	`}`
278		278
279	`if (net_send(sock, buffer, strlen((char )buffer)) != (int)strlen((char )buffer)) {`	279	`if (net_send(sock, buffer, strlen((char )buffer)) != (int)strlen((char )buffer)) {`
280	`putsnls(9, 3); /* "ERROR: failed to send a HTTP query to remote server" */`	280	`putsnls(9, 3); /* "ERROR: failed to send a HTTP query to remote server" */`
281	`goto SHITQUIT;`	281	`goto SHITQUIT;`
282	`}`	282	`}`
283		283
284	`/* send chunked data for POST queries */`	284	`/* send chunked data for POST queries */`
285	`if (ispost) {`	285	`if (ispost) {`
286	`unsigned short blen;`	286	`unsigned short blen;`
287	`int hlen;`	287	`int hlen;`
288	`char hbuf = (char )buffer + buffersz - 16;`	288	`char hbuf = (char )buffer + buffersz - 16;`
289	`do {`	289	`do {`
290	`blen = checkupdata((char *)buffer);`	290	`blen = checkupdata((char *)buffer);`
291	`if (blen == 0) { /* last item contains the message trailer */`	291	`if (blen == 0) { /* last item contains the message trailer */`
292	`hlen = sprintf(hbuf, "0\r\n");`	292	`hlen = sprintf(hbuf, "0\r\n");`
293	`} else {`	293	`} else {`
294	`hlen = sprintf(hbuf, "%X\r\n", blen);`	294	`hlen = sprintf(hbuf, "%X\r\n", blen);`
295	`}`	295	`}`
296	`if (net_send(sock, hbuf, hlen) != hlen) {`	296	`if (net_send(sock, hbuf, hlen) != hlen) {`
297	`putsnls(9, 4); /* "ERROR: failed to send POST data to remote server" */`	297	`putsnls(9, 4); /* "ERROR: failed to send POST data to remote server" */`
298	`goto SHITQUIT;`	298	`goto SHITQUIT;`
299	`}`	299	`}`
300	`/* add trailing CR/LF to buffer as required by chunked mode */`	300	`/* add trailing CR/LF to buffer as required by chunked mode */`
301	`buffer[blen++] = '\r';`	301	`buffer[blen++] = '\r';`
302	`buffer[blen++] = '\n';`	302	`buffer[blen++] = '\n';`
303	`if (net_send(sock, buffer, blen) != blen) {`	303	`if (net_send(sock, buffer, blen) != blen) {`
304	`putsnls(9, 4); /* "ERROR: failed to send POST data to remote server" */`	304	`putsnls(9, 4); /* "ERROR: failed to send POST data to remote server" */`
305	`goto SHITQUIT;`	305	`goto SHITQUIT;`
306	`}`	306	`}`
307	`} while (blen != 2);`	307	`} while (blen != 2);`
308	`}`	308	`}`
309		309
310	`/* receive and process HTTP headers */`	310	`/* receive and process HTTP headers */`
311	`byteread = htget_headers(buffer, buffersz, sock, &httpcode, &ischunked);`	311	`byteread = htget_headers(buffer, buffersz, sock, &httpcode, &ischunked);`
312		312
313	`/* transmission error? */`	313	`/* transmission error? */`
314	`if (byteread < 0) {`	314	`if (byteread < 0) {`
315	`printf(svarlang_strid(0x0905), byteread); /* "ERROR: TCP communication error #%d" */`	315	`printf(svarlang_strid(0x0905), byteread); /* "ERROR: TCP communication error #%d" */`
316	`puts("");`	316	`puts("");`
317	`goto SHITQUIT;`	317	`goto SHITQUIT;`
318	`}`	318	`}`
319		319
320	`/* open destination file if required and if no server-side error occured */`	320	`/* open destination file if required and if no server-side error occured */`
321	`if ((httpcode >= 200) && (httpcode <= 299) && (*outfname != 0)) {`	321	`if ((httpcode >= 200) && (httpcode <= 299) && (*outfname != 0)) {`
322	`fd = fopen(outfname, "wb");`	322	`fd = fopen(outfname, "wb");`
323	`if (fd == NULL) {`	323	`if (fd == NULL) {`
324	`printf(svarlang_strid(0x0906), outfname); /* "ERROR: failed to create file %s" */`	324	`printf(svarlang_strid(0x0906), outfname); /* "ERROR: failed to create file %s" */`
325	`puts("");`	325	`puts("");`
326	`goto SHITQUIT;`	326	`goto SHITQUIT;`
327	`}`	327	`}`
328	`}`	328	`}`
329		329
330	`/* read body of the answer (and chunk-decode it if needed) */`	330	`/* read body of the answer (and chunk-decode it if needed) */`
331	`lastactivity = time(NULL);`	331	`lastactivity = time(NULL);`
332	`for (;; byteread = net_recv(sock, buffer, buffersz - 1)) { /* read 1 byte less because I need to append a NULL terminator when printf'ing the content */`	332	`for (;; byteread = net_recv(sock, buffer, buffersz - 1)) { /* read 1 byte less because I need to append a NULL terminator when printf'ing the content */`
333		333
334	`if (byteread > 0) { /* got data */`	334	`if (byteread > 0) { /* got data */`
335	`lastactivity = time(NULL);`	335	`lastactivity = time(NULL);`
336		336
337	`/* unpack data if server transmits in chunked mode */`	337	`/* unpack data if server transmits in chunked mode */`
338	`if (ischunked) byteread = unchunk(buffer, byteread, unchstate);`	338	`if (ischunked) byteread = unchunk(buffer, byteread, unchstate);`
339		339
340	`/* if downloading to file, write stuff to disk */`	340	`/* if downloading to file, write stuff to disk */`
341	`if (fd != NULL) {`	341	`if (fd != NULL) {`
342	`int i;`	342	`int i;`
343	`if (fwrite(buffer, 1, byteread, fd) != byteread) {`	343	`if (fwrite(buffer, 1, byteread, fd) != byteread) {`
344	`printf(svarlang_strid(0x0907), outfname, flen); /* "ERROR: failed to write data to file %s after %ld bytes" */`	344	`printf(svarlang_strid(0x0907), outfname, flen); /* "ERROR: failed to write data to file %s after %ld bytes" */`
345	`puts("");`	345	`puts("");`
346	`break;`	346	`break;`
347	`}`	347	`}`
348	`flen += byteread;`	348	`flen += byteread;`
349	`/* update progress once a sec */`	349	`/* update progress once a sec */`
350	`if (lastprogressoutput != lastactivity) {`	350	`if (lastprogressoutput != lastactivity) {`
351	`lastprogressoutput = lastactivity;`	351	`lastprogressoutput = lastactivity;`
352	`printf("%ld KiB (%ld KiB/s) \r", flen >> 10, (flen >> 10) - (lastflen >> 10)); /* trailing spaces are meant to avoid leaving garbage on screen if speed goes from, say, 1000 KiB/s to 9 KiB/s */`	352	`printf("%ld KiB (%ld KiB/s) \r", flen >> 10, (flen >> 10) - (lastflen >> 10)); /* trailing spaces are meant to avoid leaving garbage on screen if speed goes from, say, 1000 KiB/s to 9 KiB/s */`
353	`lastflen = flen;`	353	`lastflen = flen;`
354	`fflush(stdout); /* avoid console buffering */`	354	`fflush(stdout); /* avoid console buffering */`
355	`}`	355	`}`
356	`/* update the bsd sum */`	356	`/* update the bsd sum */`
357	`for (i = 0; i < byteread; i++) {`	357	`for (i = 0; i < byteread; i++) {`
358	`/* rotr16 */`	358	`/* rotr16 */`
359	`unsigned short bsumlsb = *bsum & 1;`	359	`unsigned short bsumlsb = *bsum & 1;`
360	`*bsum >>= 1;`	360	`*bsum >>= 1;`
361	`*bsum \|= (bsumlsb << 15);`	361	`*bsum \|= (bsumlsb << 15);`
362	`*bsum += buffer[i];`	362	`*bsum += buffer[i];`
363	`}`	363	`}`
364	`} else { /* otherwise dump to screen */`	364	`} else { /* otherwise dump to screen */`
365	`buffer[byteread] = 0;`	365	`buffer[byteread] = 0;`
366	`printf("%s", buffer);`	366	`printf("%s", buffer);`
367	`}`	367	`}`
368		368
369	`} else if (byteread < 0) { /* end of connection */`	369	`} else if (byteread < 0) { /* end of connection */`
370	`break;`	370	`break;`
371		371
372	`} else { /* check for timeout (byteread == 0) */`	372	`} else { /* check for timeout (byteread == 0) */`
373	`if (time(NULL) - lastactivity > 20) { /* TIMEOUT! */`	373	`if (time(NULL) - lastactivity > 20) { /* TIMEOUT! */`
374	`putsnls(9, 8); /* "ERROR: Timeout while waiting for data" */`	374	`putsnls(9, 8); /* "ERROR: Timeout while waiting for data" */`
375	`goto SHITQUIT;`	375	`goto SHITQUIT;`
376	`}`	376	`}`
377	`/* waiting for packets - release a CPU cycle in the meantime */`	377	`/* waiting for packets - release a CPU cycle in the meantime */`
378	`_asm int 28h;`	378	`_asm int 28h;`
379	`}`	379	`}`
380	`}`	380	`}`
381		381
382	`goto ALLGOOD;`	382	`goto ALLGOOD;`
383		383
384	`SHITQUIT:`	384	`SHITQUIT:`
385	`flen = -1;`	385	`flen = -1;`
386		386
387	`ALLGOOD:`	387	`ALLGOOD:`
388	`if (fd != NULL) fclose(fd);`	388	`if (fd != NULL) fclose(fd);`
389	`net_close(sock);`	389	`net_close(sock);`
390	`return(flen);`	390	`return(flen);`
391	`}`	391	`}`
392		392
393		393
394	`/* checks if file exists, returns 0 if not, non-zero otherwise */`	394	`/* checks if file exists, returns 0 if not, non-zero otherwise */`
395	`static int fexists(const char *fname) {`	395	`static int fexists(const char *fname) {`
396	`FILE *fd = fopen(fname, "rb");`	396	`FILE *fd = fopen(fname, "rb");`
397	`if (fd == NULL) return(0);`	397	`if (fd == NULL) return(0);`
398	`fclose(fd);`	398	`fclose(fd);`
399	`return(1);`	399	`return(1);`
400	`}`	400	`}`
401		401
402		402
403	`int main(int argc, char **argv) {`	403	`int main(int argc, char **argv) {`
404	`unsigned short bsum = 0;`	404	`unsigned short bsum = 0;`
405	`long flen;`	405	`long flen;`
406	`int ispost; /* is the request a POST? */`	406	`int ispost; /* is the request a POST? */`
407		407
408	`struct {`	408	`struct {`
409	`unsigned char buffer[5000];`	409	`unsigned char buffer[5000];`
410	`char ipaddr[64];`	410	`char ipaddr[64];`
411	`char url[64];`	411	`char url[64];`
412	`char outfname[16];`	412	`char outfname[16];`
413	`} *mem;`	413	`} *mem;`
414		414
415	`svarlang_autoload("PKGNET");`	415	`svarlang_autoload("PKGNET");`
416		416
417	`/* allocate memory */`	417	`/* allocate memory */`
418	`mem = malloc(sizeof(*mem));`	418	`mem = malloc(sizeof(*mem));`
419	`if (mem == NULL) {`	419	`if (mem == NULL) {`
420	`putsnls(9, 9); /* "ERROR: out of memory" */`	420	`putsnls(9, 9); /* "ERROR: out of memory" */`
421	`return(1);`	421	`return(1);`
422	`}`	422	`}`
423		423
424	`/* parse command line arguments */`	424	`/* parse command line arguments */`
425	`if (parseargv(argc, argv, mem->outfname, mem->url, &ispost) != 0) return(1);`	425	`if (parseargv(argc, argv, mem->outfname, mem->url, &ispost) != 0) return(1);`
426		426
427	`/* if outfname requested, make sure that file does not exist yet */`	427	`/* if outfname requested, make sure that file does not exist yet */`
428	`if ((mem->outfname[0] != 0) && (fexists(mem->outfname))) {`	428	`if ((mem->outfname[0] != 0) && (fexists(mem->outfname))) {`
429	`printf(svarlang_strid(0x090A), mem->outfname); /* "ERROR: file %s already exists" */`	429	`printf(svarlang_strid(0x090A), mem->outfname); /* "ERROR: file %s already exists" */`
430	`puts("");`	430	`puts("");`
431	`return(1);`	431	`return(1);`
432	`}`	432	`}`
433		433
434	`/* init network stack */`	434	`/* init network stack */`
435	`if (net_init() != 0) {`	435	`if (net_init() != 0) {`
436	`putsnls(9, 11); /* "ERROR: Network subsystem initialization failed" */`	436	`putsnls(9, 11); /* "ERROR: Network subsystem initialization failed" */`
437	`return(1);`	437	`return(1);`
438	`}`	438	`}`
439		439
440	`puts(""); /* required because watt-32 likes to print out garbage sometimes ("configuring through DHCP...") */`	440	`puts(""); /* required because watt-32 likes to print out garbage sometimes ("configuring through DHCP...") */`
441		441
442	`if (net_dnsresolve(mem->ipaddr, HOSTADDR) != 0) {`	442	`if (net_dnsresolve(mem->ipaddr, HOSTADDR) != 0) {`
443	`putsnls(9, 12); /* "ERROR: DNS resolution failed" */`	443	`putsnls(9, 12); /* "ERROR: DNS resolution failed" */`
444	`return(1);`	444	`return(1);`
445	`}`	445	`}`
446		446
447	`flen = htget(mem->ipaddr, mem->url, mem->outfname, &bsum, ispost, mem->buffer, sizeof(mem->buffer));`	447	`flen = htget(mem->ipaddr, mem->url, mem->outfname, &bsum, ispost, mem->buffer, sizeof(mem->buffer));`
448	`if (flen < 1) return(1);`	448	`if (flen < 1) return(1);`
449		449
450	`if (mem->outfname[0] != 0) {`	450	`if (mem->outfname[0] != 0) {`
451	`/* print bsum, size, filename */`	451	`/* print bsum, size, filename */`
452	`printf(svarlang_strid(0x0200), flen >> 10, mem->outfname, bsum); /* Downloaded %ld KiB into %s (BSUM: %04X) */`	452	`printf(svarlang_strid(0x0200), flen >> 10, mem->outfname, bsum); /* Downloaded %ld KiB into %s (BSUM: %04X) */`
453	`puts("");`	453	`puts("");`
454	`}`	454	`}`
455		455
456	`return(0);`	456	`return(0);`
457	`}`	457	`}`
458		458

Subversion Repositories SvarDOS

(root)/pkgnet/tags/20220215/pkgnet.c – Rev 712 → 715