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


/*
 * pkgnet - pulls SvarDOS packages from the project's online repository
 * Copyright (C) 2021 Mateusz Viste
 *
 * PUBLISHED UNDER THE TERMS OF THE MIT LICENSE
 *
 * COPYRIGHT (C) 2016-2021 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.osdn.io
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
 
#include "net.h"
 
#define PVER "20210121"
#define PDATE "2021"
 
#define HOSTADDR "svardos.osdn.io"
 
 
/* strips http headers and returns new buff len */
static int detecthttpheadersend(unsigned char *buff, int len) {
  static char lastbyteislf = 0; /* static because I must potentially remember it for next packet/call */
  int i;
  for (i = 0; i < len; 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! rewind the buffer and return new len */
    len -= (i + 1);
    if (len > 0) memmove(buff, buff + i + 1, len);
    return(len);
  }
  return(0);
}
 
 
static void help(void) {
  puts("pkgnet ver " PVER " -- Copyright (C) " PDATE " Mateusz Viste");
  puts("");
  puts("pkgnet is the SvarDOS package downloader.");
  puts("");
  puts("usage:  pkgnet search <term>");
  puts("        pkgnet pull <package>");
  puts("        pkgnet checkup");
  puts("");
  puts("actions:");
  puts(" search   - asks remote repository for the list of matching packages");
  puts(" pull     - downloads package into current directory");
  puts(" checkup  - lists updates available for your system");
  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) {
  *outfname = 0;
  *url = 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)) {
    if ((strlen(argv[2]) > 8) || (argv[2][0] == 0)) {
      puts("ERROR: package name must be 8 characters maximum");
      return(-1);
    }
    sprintf(url, "/repo/?a=pull&p=%s", argv[2]);
    sprintf(outfname, "%s.zip", argv[2]);
  } else if ((argc == 2) && (strcasecmp(argv[1], "checkup") == 0)) {
    puts("NOT SUPPORTED YET");
    return(-1);
  } else {
    help();
    return(-1);
  }
  return(0);
}
 
 
/* 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
 * 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) {
  struct net_tcpsocket *sock;
  unsigned char buffer[4096];
  time_t lastactivity;
  int headersdone = 0;
  int httpcode = -1;
  long flen = 0;
  FILE *fd = NULL;
 
  sock = net_connect(ipaddr, 80);
  if (sock == NULL) {
    puts("ERROR: failed to connect to " HOSTADDR);
    goto SHITQUIT;
  }
 
  /* wait for net_connect() to actually connect */
  for (;;) {
    int connstate = net_isconnected(sock, 1);
    if (connstate > 0) break;
    if (connstate < 0) {
      puts("ERROR: connection error");
      goto SHITQUIT;
    }
    _asm int 28h;  /* DOS idle */
  }
 
  /* socket is connected - send the http request */
  snprintf((char *)buffer, sizeof(buffer), "GET %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet\r\nConnection: close\r\n\r\n", url);
 
  if (net_send(sock, (char *)buffer, strlen((char *)buffer)) != (int)strlen((char *)buffer)) {
    puts("ERROR: failed to send HTTP query to remote server");
    goto SHITQUIT;
  }
 
  lastactivity = time(NULL);
  for (;;) {
    int byteread = net_recv(sock, (char *)buffer, sizeof(buffer) - 1); /* -1 because I will append a NULL terminator */
 
    if (byteread < 0) break; /* end of connection */
 
    /*  */
    if (byteread == 0) {
      if (time(NULL) - lastactivity > 20) { /* TIMEOUT! */
        puts("ERROR: Timeout while waiting for data");
        goto SHITQUIT;
      }
      /* waiting for packets - release a CPU cycle in the meantime */
      _asm int 28h;
      /* */
      continue;
    }
 
    if (byteread > 0) {
      buffer[byteread] = 0;
      lastactivity = time(NULL);
      /* do I know the http code yet? */
      if (httpcode < 0) {
        httpcode = atoi((char *)buffer);
        /* on error, the answer should be always printed on screen */
        if ((httpcode == 200) && (*outfname != 0)) {
          fd = fopen(outfname, "wb");
          if (fd == NULL) {
            printf("ERROR: failed to create file %s", outfname);
            puts("");
            goto SHITQUIT;
          }
        }
      }
      /* skip headers: look for \r\n\r\n or \n\n within the stream */
      if (headersdone == 0) {
        byteread = detecthttpheadersend(buffer, byteread);
        headersdone = 1;
        if (byteread == 0) continue;
      }
      /* if downloading to file, write stuff to disk */
      if (fd != NULL) {
        int i;
        if (fwrite(buffer, 1, byteread, fd) != byteread) {
          printf("ERROR: failed to write data to file %s after %ld bytes", outfname, flen);
          puts("");
          break;
        }
        flen += byteread;
        /* update the bsd sum */
        for (i = 0; i < byteread; i++) {
          /* rotr16 */
          unsigned short bsumlsb = *bsum & 1;
          *bsum >>= 1;
          *bsum |= (bsumlsb << 15);
          /* bsum += ch */
          *bsum += buffer[i];
        }
      } else { /* otherwise dump to screen */
        printf("%s", buffer);
      }
    }
  }
  net_close(sock);
  return(flen);
 
  SHITQUIT:
  net_abort(sock);
  return(-1);
}
 
 
/* 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) {
  char ipaddr[64];
  char url[64];
  unsigned short bsum = 0;
  char outfname[16];
  long flen;
 
  /* parse command line arguments */
  if (parseargv(argc, argv, outfname, url) != 0) return(1);
 
  /* if outfname requested, make sure that file does not exist yet */
  if (fexists(outfname)) {
    printf("ERROR: file %s already exists", outfname);
    puts("");
    return(1);
  }
 
  /* init network stack */
  if (net_init() != 0) {
    puts("ERROR: Network subsystem initialization failed");
    return(1);
  }
 
  puts(""); /* required because watt-32 likes to print out garbage sometimes ("configuring through DHCP...") */
 
  if (net_dnsresolve(ipaddr, HOSTADDR) != 0) {
    puts("ERROR: DNS resolution failed");
    return(1);
  }
 
  flen = htget(ipaddr, url, outfname, &bsum);
  if (flen < 1) return(1);
 
  if (*outfname != 0) {
    /* print bsum, size, filename */
    printf("Downloaded %ld KiB into %s (BSUM: %04X)", flen >> 10, outfname, bsum);
    puts("");
  }
 
  return(0);
}
 

Rev 211	Rev 214
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	`* Copyright (C) 2021 Mateusz Viste`	3	`* Copyright (C) 2021 Mateusz Viste`
4	`*`	4	`*`
5	`* PUBLISHED UNDER THE TERMS OF THE MIT LICENSE`	5	`* PUBLISHED UNDER THE TERMS OF THE MIT LICENSE`
6	`*`	6	`*`
7	`* COPYRIGHT (C) 2016-2021 MATEUSZ VISTE, ALL RIGHTS RESERVED.`	7	`* COPYRIGHT (C) 2016-2021 MATEUSZ VISTE, ALL RIGHTS RESERVED.`
8	`*`	8	`*`
9	`* Permission is hereby granted, free of charge, to any person obtaining a`	9	`* Permission is hereby granted, free of charge, to any person obtaining a`
10	`* copy of this software and associated documentation files (the "Software"),`	10	`* copy of this software and associated documentation files (the "Software"),`
11	`* to deal in the Software without restriction, including without limitation`	11	`* to deal in the Software without restriction, including without limitation`
12	`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`	12	`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`
13	`* and/or sell copies of the Software, and to permit persons to whom the`	13	`* and/or sell copies of the Software, and to permit persons to whom the`
14	`* Software is furnished to do so, subject to the following conditions:`	14	`* Software is furnished to do so, subject to the following conditions:`
15	`*`	15	`*`
16	`* The above copyright notice and this permission notice shall be included in`	16	`* The above copyright notice and this permission notice shall be included in`
17	`* all copies or substantial portions of the Software.`	17	`* all copies or substantial portions of the Software.`
18	`*`	18	`*`
19	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`	19	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`
20	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`	20	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`
21	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`	21	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`
22	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`	22	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`
23	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`	23	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`
24	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER`	24	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER`
25	`* DEALINGS IN THE SOFTWARE.`	25	`* DEALINGS IN THE SOFTWARE.`
26	`*`	26	`*`
27	`* http://svardos.osdn.io`	27	`* http://svardos.osdn.io`
28	`*/`	28	`*/`
29		29
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		36
37	`#define PVER "20210121"`	37	`#define PVER "20210121"`
38	`#define PDATE "2021"`	38	`#define PDATE "2021"`
39		39
40	`#define HOSTADDR "svardos.osdn.io"`	40	`#define HOSTADDR "svardos.osdn.io"`
41		41
42		42
43	`/* strips http headers and returns new buff len */`	43	`/* strips http headers and returns new buff len */`
44	`static int detecthttpheadersend(unsigned char *buff, int len) {`	44	`static int detecthttpheadersend(unsigned char *buff, int len) {`
45	`static char lastbyteislf = 0; /* static because I must potentially remember it for next packet/call */`	45	`static char lastbyteislf = 0; /* static because I must potentially remember it for next packet/call */`
46	`int i;`	46	`int i;`
47	`for (i = 0; i < len; i++) {`	47	`for (i = 0; i < len; i++) {`
48	`if (buff[i] == '\r') continue; /* ignore CR characters */`	48	`if (buff[i] == '\r') continue; /* ignore CR characters */`
49	`if (buff[i] != '\n') {`	49	`if (buff[i] != '\n') {`
50	`lastbyteislf = 0;`	50	`lastbyteislf = 0;`
51	`continue;`	51	`continue;`
52	`}`	52	`}`
53	`/* cur byte is LF -> if last one was also LF then this is an empty line, meaning headers are over */`	53	`/* cur byte is LF -> if last one was also LF then this is an empty line, meaning headers are over */`
54	`if (lastbyteislf == 0) {`	54	`if (lastbyteislf == 0) {`
55	`lastbyteislf = 1;`	55	`lastbyteislf = 1;`
56	`continue;`	56	`continue;`
57	`}`	57	`}`
58	`/* end of headers! rewind the buffer and return new len */`	58	`/* end of headers! rewind the buffer and return new len */`
59	`len -= (i + 1);`	59	`len -= (i + 1);`
60	`if (len > 0) memmove(buff, buff + i + 1, len);`	60	`if (len > 0) memmove(buff, buff + i + 1, len);`
61	`return(len);`	61	`return(len);`
62	`}`	62	`}`
63	`return(0);`	63	`return(0);`
64	`}`	64	`}`
65		65
66		66
67	`static void help(void) {`	67	`static void help(void) {`
68	`puts("pkgnet ver " PVER " -- Copyright (C) " PDATE " Mateusz Viste");`	68	`puts("pkgnet ver " PVER " -- Copyright (C) " PDATE " Mateusz Viste");`
69	`puts("");`	69	`puts("");`
70	`puts("pkgnet is the SvarDOS package downloader.");`	70	`puts("pkgnet is the SvarDOS package downloader.");`
71	`puts("");`	71	`puts("");`
72	`puts("usage: pkgnet search <term>");`	72	`puts("usage: pkgnet search <term>");`
73	`puts(" pkgnet pull <package>");`	73	`puts(" pkgnet pull <package>");`
74	`puts(" pkgnet checkup");`	74	`puts(" pkgnet checkup");`
75	`puts("");`	75	`puts("");`
76	`puts("actions:");`	76	`puts("actions:");`
77	`puts(" search - asks remote repository for the list of matching packages");`	77	`puts(" search - asks remote repository for the list of matching packages");`
78	`puts(" pull - downloads package into current directory");`	78	`puts(" pull - downloads package into current directory");`
79	`puts(" checkup - lists updates available for your system");`	79	`puts(" checkup - lists updates available for your system");`
80	`puts("");`	80	`puts("");`
81	`}`	81	`}`
82		82
83		83
84	`/* parses command line arguments and fills outfname and url accordingly`	84	`/* parses command line arguments and fills outfname and url accordingly`
85	`* returns 0 on success, non-zero otherwise */`	85	`* returns 0 on success, non-zero otherwise */`
86	`static int parseargv(int argc, char * const argv, char outfname, char *url) {`	86	`static int parseargv(int argc, char * const argv, char outfname, char *url) {`
87	`*outfname = 0;`	87	`*outfname = 0;`
88	`*url = 0;`	88	`*url = 0;`
89	`if ((argc == 3) && (strcasecmp(argv[1], "search") == 0)) {`	89	`if ((argc == 3) && (strcasecmp(argv[1], "search") == 0)) {`
90	`sprintf(url, "/pkg.php?a=search&p=%s", argv[2]);`	90	`sprintf(url, "/repo/?a=search&p=%s", argv[2]);`
91	`} else if ((argc == 3) && (strcasecmp(argv[1], "pull") == 0)) {`	91	`} else if ((argc == 3) && (strcasecmp(argv[1], "pull") == 0)) {`
92	`if ((strlen(argv[2]) > 8) \|\| (argv[2][0] == 0)) {`	92	`if ((strlen(argv[2]) > 8) \|\| (argv[2][0] == 0)) {`
93	`puts("ERROR: package name must be 8 characters maximum");`	93	`puts("ERROR: package name must be 8 characters maximum");`
94	`return(-1);`	94	`return(-1);`
95	`}`	95	`}`
96	`sprintf(url, "/pkg.php?a=pull&p=%s", argv[2]);`	96	`sprintf(url, "/repo/?a=pull&p=%s", argv[2]);`
97	`sprintf(outfname, "%s.zip", argv[2]);`	97	`sprintf(outfname, "%s.zip", argv[2]);`
98	`} else if ((argc == 2) && (strcasecmp(argv[1], "checkup") == 0)) {`	98	`} else if ((argc == 2) && (strcasecmp(argv[1], "checkup") == 0)) {`
99	`puts("NOT SUPPORTED YET");`	99	`puts("NOT SUPPORTED YET");`
100	`return(-1);`	100	`return(-1);`
101	`} else {`	101	`} else {`
102	`help();`	102	`help();`
103	`return(-1);`	103	`return(-1);`
104	`}`	104	`}`
105	`return(0);`	105	`return(0);`
106	`}`	106	`}`
107		107
108		108
109	`/* fetch http data from ipaddr using url`	109	`/* fetch http data from ipaddr using url`
110	`* write result to file outfname if not null, or print to stdout otherwise`	110	`* write result to file outfname if not null, or print to stdout otherwise`
111	`* fills bsum with the BSD sum of the data`	111	`* fills bsum with the BSD sum of the data`
112	`* returns the length of data obtained, or neg value on error */`	112	`* returns the length of data obtained, or neg value on error */`
113	`static long htget(const char ipaddr, const char url, const char outfname, unsigned short bsum) {`	113	`static long htget(const char ipaddr, const char url, const char outfname, unsigned short bsum) {`
114	`struct net_tcpsocket *sock;`	114	`struct net_tcpsocket *sock;`
115	`unsigned char buffer[4096];`	115	`unsigned char buffer[4096];`
116	`time_t lastactivity;`	116	`time_t lastactivity;`
117	`int headersdone = 0;`	117	`int headersdone = 0;`
118	`int httpcode = -1;`	118	`int httpcode = -1;`
119	`long flen = 0;`	119	`long flen = 0;`
120	`FILE *fd = NULL;`	120	`FILE *fd = NULL;`
121		121
122	`sock = net_connect(ipaddr, 80);`	122	`sock = net_connect(ipaddr, 80);`
123	`if (sock == NULL) {`	123	`if (sock == NULL) {`
124	`puts("ERROR: failed to connect to " HOSTADDR);`	124	`puts("ERROR: failed to connect to " HOSTADDR);`
125	`goto SHITQUIT;`	125	`goto SHITQUIT;`
126	`}`	126	`}`
127		127
128	`/* wait for net_connect() to actually connect */`	128	`/* wait for net_connect() to actually connect */`
129	`for (;;) {`	129	`for (;;) {`
130	`int connstate = net_isconnected(sock, 1);`	130	`int connstate = net_isconnected(sock, 1);`
131	`if (connstate > 0) break;`	131	`if (connstate > 0) break;`
132	`if (connstate < 0) {`	132	`if (connstate < 0) {`
133	`puts("ERROR: connection error");`	133	`puts("ERROR: connection error");`
134	`goto SHITQUIT;`	134	`goto SHITQUIT;`
135	`}`	135	`}`
136	`_asm int 28h; /* DOS idle */`	136	`_asm int 28h; /* DOS idle */`
137	`}`	137	`}`
138		138
139	`/* socket is connected - send the http request */`	139	`/* socket is connected - send the http request */`
140	`snprintf((char *)buffer, sizeof(buffer), "GET %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet\r\nConnection: close\r\n\r\n", url);`	140	`snprintf((char *)buffer, sizeof(buffer), "GET %s HTTP/1.1\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet\r\nConnection: close\r\n\r\n", url);`
141		141
142	`if (net_send(sock, (char )buffer, strlen((char )buffer)) != (int)strlen((char *)buffer)) {`	142	`if (net_send(sock, (char )buffer, strlen((char )buffer)) != (int)strlen((char *)buffer)) {`
143	`puts("ERROR: failed to send HTTP query to remote server");`	143	`puts("ERROR: failed to send HTTP query to remote server");`
144	`goto SHITQUIT;`	144	`goto SHITQUIT;`
145	`}`	145	`}`
146		146
147	`lastactivity = time(NULL);`	147	`lastactivity = time(NULL);`
148	`for (;;) {`	148	`for (;;) {`
149	`int byteread = net_recv(sock, (char )buffer, sizeof(buffer) - 1); / -1 because I will append a NULL terminator */`	149	`int byteread = net_recv(sock, (char )buffer, sizeof(buffer) - 1); / -1 because I will append a NULL terminator */`
150		150
151	`if (byteread < 0) break; /* end of connection */`	151	`if (byteread < 0) break; /* end of connection */`
152		152
153	`/* */`	153	`/* */`
154	`if (byteread == 0) {`	154	`if (byteread == 0) {`
155	`if (time(NULL) - lastactivity > 20) { /* TIMEOUT! */`	155	`if (time(NULL) - lastactivity > 20) { /* TIMEOUT! */`
156	`puts("ERROR: Timeout while waiting for data");`	156	`puts("ERROR: Timeout while waiting for data");`
157	`goto SHITQUIT;`	157	`goto SHITQUIT;`
158	`}`	158	`}`
159	`/* waiting for packets - release a CPU cycle in the meantime */`	159	`/* waiting for packets - release a CPU cycle in the meantime */`
160	`_asm int 28h;`	160	`_asm int 28h;`
161	`/* */`	161	`/* */`
162	`continue;`	162	`continue;`
163	`}`	163	`}`
164		164
165	`if (byteread > 0) {`	165	`if (byteread > 0) {`
166	`buffer[byteread] = 0;`	166	`buffer[byteread] = 0;`
167	`lastactivity = time(NULL);`	167	`lastactivity = time(NULL);`
168	`/* do I know the http code yet? */`	168	`/* do I know the http code yet? */`
169	`if (httpcode < 0) {`	169	`if (httpcode < 0) {`
170	`httpcode = atoi((char *)buffer);`	170	`httpcode = atoi((char *)buffer);`
171	`/* on error, the answer should be always printed on screen */`	171	`/* on error, the answer should be always printed on screen */`
172	`if ((httpcode == 200) && (*outfname != 0)) {`	172	`if ((httpcode == 200) && (*outfname != 0)) {`
173	`fd = fopen(outfname, "wb");`	173	`fd = fopen(outfname, "wb");`
174	`if (fd == NULL) {`	174	`if (fd == NULL) {`
175	`printf("ERROR: failed to create file %s", outfname);`	175	`printf("ERROR: failed to create file %s", outfname);`
176	`puts("");`	176	`puts("");`
177	`goto SHITQUIT;`	177	`goto SHITQUIT;`
178	`}`	178	`}`
179	`}`	179	`}`
180	`}`	180	`}`
181	`/* skip headers: look for \r\n\r\n or \n\n within the stream */`	181	`/* skip headers: look for \r\n\r\n or \n\n within the stream */`
182	`if (headersdone == 0) {`	182	`if (headersdone == 0) {`
183	`byteread = detecthttpheadersend(buffer, byteread);`	183	`byteread = detecthttpheadersend(buffer, byteread);`
184	`headersdone = 1;`	184	`headersdone = 1;`
185	`if (byteread == 0) continue;`	185	`if (byteread == 0) continue;`
186	`}`	186	`}`
187	`/* if downloading to file, write stuff to disk */`	187	`/* if downloading to file, write stuff to disk */`
188	`if (fd != NULL) {`	188	`if (fd != NULL) {`
189	`int i;`	189	`int i;`
190	`if (fwrite(buffer, 1, byteread, fd) != byteread) {`	190	`if (fwrite(buffer, 1, byteread, fd) != byteread) {`
191	`printf("ERROR: failed to write data to file %s after %ld bytes", outfname, flen);`	191	`printf("ERROR: failed to write data to file %s after %ld bytes", outfname, flen);`
192	`puts("");`	192	`puts("");`
193	`break;`	193	`break;`
194	`}`	194	`}`
195	`flen += byteread;`	195	`flen += byteread;`
196	`/* update the bsd sum */`	196	`/* update the bsd sum */`
197	`for (i = 0; i < byteread; i++) {`	197	`for (i = 0; i < byteread; i++) {`
198	`/* rotr16 */`	198	`/* rotr16 */`
199	`unsigned short bsumlsb = *bsum & 1;`	199	`unsigned short bsumlsb = *bsum & 1;`
200	`*bsum >>= 1;`	200	`*bsum >>= 1;`
201	`*bsum \|= (bsumlsb << 15);`	201	`*bsum \|= (bsumlsb << 15);`
202	`/* bsum += ch */`	202	`/* bsum += ch */`
203	`*bsum += buffer[i];`	203	`*bsum += buffer[i];`
204	`}`	204	`}`
205	`} else { /* otherwise dump to screen */`	205	`} else { /* otherwise dump to screen */`
206	`printf("%s", buffer);`	206	`printf("%s", buffer);`
207	`}`	207	`}`
208	`}`	208	`}`
209	`}`	209	`}`
210	`net_close(sock);`	210	`net_close(sock);`
211	`return(flen);`	211	`return(flen);`
212		212
213	`SHITQUIT:`	213	`SHITQUIT:`
214	`net_abort(sock);`	214	`net_abort(sock);`
215	`return(-1);`	215	`return(-1);`
216	`}`	216	`}`
217		217
218		218
219	`/* checks if file exists, returns 0 if not, non-zero otherwise */`	219	`/* checks if file exists, returns 0 if not, non-zero otherwise */`
220	`static int fexists(const char *fname) {`	220	`static int fexists(const char *fname) {`
221	`FILE *fd = fopen(fname, "rb");`	221	`FILE *fd = fopen(fname, "rb");`
222	`if (fd == NULL) return(0);`	222	`if (fd == NULL) return(0);`
223	`fclose(fd);`	223	`fclose(fd);`
224	`return(1);`	224	`return(1);`
225	`}`	225	`}`
226		226
227		227
228	`int main(int argc, char **argv) {`	228	`int main(int argc, char **argv) {`
229	`char ipaddr[64];`	229	`char ipaddr[64];`
230	`char url[64];`	230	`char url[64];`
231	`unsigned short bsum = 0;`	231	`unsigned short bsum = 0;`
232	`char outfname[16];`	232	`char outfname[16];`
233	`long flen;`	233	`long flen;`
234		234
235	`/* parse command line arguments */`	235	`/* parse command line arguments */`
236	`if (parseargv(argc, argv, outfname, url) != 0) return(1);`	236	`if (parseargv(argc, argv, outfname, url) != 0) return(1);`
237		237
238	`/* if outfname requested, make sure that file does not exist yet */`	238	`/* if outfname requested, make sure that file does not exist yet */`
239	`if (fexists(outfname)) {`	239	`if (fexists(outfname)) {`
240	`printf("ERROR: file %s already exists", outfname);`	240	`printf("ERROR: file %s already exists", outfname);`
241	`puts("");`	241	`puts("");`
242	`return(1);`	242	`return(1);`
243	`}`	243	`}`
244		244
245	`/* init network stack */`	245	`/* init network stack */`
246	`if (net_init() != 0) {`	246	`if (net_init() != 0) {`
247	`puts("ERROR: Network subsystem initialization failed");`	247	`puts("ERROR: Network subsystem initialization failed");`
248	`return(1);`	248	`return(1);`
249	`}`	249	`}`
250		250
251	`puts(""); /* required because watt-32 likes to print out garbage sometimes ("configuring through DHCP...") */`	251	`puts(""); /* required because watt-32 likes to print out garbage sometimes ("configuring through DHCP...") */`
252		252
253	`if (net_dnsresolve(ipaddr, HOSTADDR) != 0) {`	253	`if (net_dnsresolve(ipaddr, HOSTADDR) != 0) {`
254	`puts("ERROR: DNS resolution failed");`	254	`puts("ERROR: DNS resolution failed");`
255	`return(1);`	255	`return(1);`
256	`}`	256	`}`
257		257
258	`flen = htget(ipaddr, url, outfname, &bsum);`	258	`flen = htget(ipaddr, url, outfname, &bsum);`
259	`if (flen < 1) return(1);`	259	`if (flen < 1) return(1);`
260		260
261	`if (*outfname != 0) {`	261	`if (*outfname != 0) {`
262	`/* print bsum, size, filename */`	262	`/* print bsum, size, filename */`
263	`printf("Downloaded %ld KiB into %s (BSUM: %04X)", flen >> 10, outfname, bsum);`	263	`printf("Downloaded %ld KiB into %s (BSUM: %04X)", flen >> 10, outfname, bsum);`
264	`puts("");`	264	`puts("");`
265	`}`	265	`}`
266		266
267	`return(0);`	267	`return(0);`
268	`}`	268	`}`
269		269

Subversion Repositories SvarDOS

(root)/pkgnet/pkgnet.c – Rev 211 → 214