| 0,0 → 1,285 |
|---|
| /* |
| * 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 "20210513" |
| #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 */ |
| i += 1; /* add 1 to skip the current \n character */ |
| len -= i; |
| if (len > 0) memmove(buff, buff + i, len + 1); /* +1 so I catch the string terminator as well */ |
| 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, lastprogressoutput = 0; |
| 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); |
| 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 (MUST be HTTP/1.0 because I do not support chunked transfers!) */ |
| snprintf((char *)buffer, sizeof(buffer), "GET %s HTTP/1.0\r\nHOST: " HOSTADDR "\r\nUSER-AGENT: pkgnet\r\nConnection: close\r\n\r\n", url); |
| |
| if (net_send(sock, 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, 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) { |
| int spc; |
| /* find the first space (HTTP/1.1 200 OK) */ |
| for (spc = 0; spc < 16; spc++) { |
| if (buffer[spc] == ' ') break; |
| if (buffer[spc] == 0) break; |
| } |
| if (buffer[spc] == 0) continue; /* not enough data received */ |
| if (buffer[spc] != ' ') { |
| puts("ERROR: server answered with invalid HTTP"); |
| goto SHITQUIT; |
| } |
| httpcode = atoi((char *)(buffer + spc + 1)); |
| /* 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 progress once a sec */ |
| if (lastprogressoutput != lastactivity) { |
| lastprogressoutput = lastactivity; |
| printf("%ld KiB\r", flen >> 10); |
| } |
| /* 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); |
| } |