Index: /trunk/ntripclient/NtripLinuxClient.c =================================================================== --- /trunk/ntripclient/NtripLinuxClient.c (revision 2) +++ /trunk/ntripclient/NtripLinuxClient.c (revision 2) @@ -0,0 +1,288 @@ +/* + Easy example NTRIP client for Linux/Unix. + Copyright (C) 2003 by Dirk Stoecker + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + or read http://www.gnu.org/licenses/gpl.txt +*/ + +/* Version history + Please always keep revision history and the two related strings up to date! + 1.1 2003-02-24 stoecker initial version + 1.2 2003-02-25 stoecker fixed agent string +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* The string, which is send as agent in HTTP request */ +#define AGENTSTRING "NTRIP NtripLinuxClient" + +#define MAXDATASIZE 1000 /* max number of bytes we can get at once */ +char buf[MAXDATASIZE]; + +/* CVS revision and version */ +static char revisionstr[] = "$Revision: 1.3 $"; +static char datestr[] = "$Date: 2003/03/20 13:00:00 $"; + +struct Args +{ + char *server; + int port; + char *user; + char *password; + char *data; +}; + +/* option parsing */ +#ifdef NO_LONG_OPTS +#define LONG_OPT(a) +#else +#define LONG_OPT(a) a +static struct option opts[] = { +{ "data", required_argument, 0, 'd'}, +{ "server", required_argument, 0, 's'}, +{ "password", required_argument, 0, 'p'}, +{ "port", required_argument, 0, 'r'}, +{ "user", required_argument, 0, 'u'}, +{ "help", no_argument, 0, 'h'}, +{0,0,0,0}}; +#endif +#define ARGOPT "d:hp:r:s:u:" + +static int getargs(int argc, char **argv, struct Args *args) +{ + int res = 1; + int getoptr; + char *a; + int i = 0, help = 0; + char *t; + + args->server = "129.217.182.51"; + args->port = 80; + args->user = ""; + args->password = ""; + args->data = 0; + help = 0; + + do + { +#ifdef NO_LONG_OPTS + switch((getoptr = getopt(argc, argv, ARGOPT))) +#else + switch((getoptr = getopt_long(argc, argv, ARGOPT, opts, 0))) +#endif + { + case 's': args->server = optarg; break; + case 'u': args->user = optarg; break; + case 'p': args->password = optarg; break; + case 'd': args->data = optarg; break; + case 'h': help=1; break; + case 'r': + args->port = strtoul(optarg, &t, 10); + if((t && *t) || args->port < 1 || args->port > 65535) + res = 0; + break; + case -1: break; + } + } while(getoptr != -1 || !res); + + for(a = revisionstr+11; *a && *a != ' '; ++a) + revisionstr[i++] = *a; + revisionstr[i] = 0; + datestr[0] = datestr[7]; + datestr[1] = datestr[8]; + datestr[2] = datestr[9]; + datestr[3] = datestr[10]; + datestr[5] = datestr[12]; + datestr[6] = datestr[13]; + datestr[8] = datestr[15]; + datestr[9] = datestr[16]; + datestr[4] = datestr[7] = '-'; + datestr[10] = 0; + + if(!res || help) + { + fprintf(stderr, "Version %s (%s) GPL\nUsage: %s -s server -u user ...\n" + " -d " LONG_OPT("--data ") "the requested data set\n" + " -s " LONG_OPT("--server ") "the server name or address\n" + " -p " LONG_OPT("--password ") "the login password\n" + " -r " LONG_OPT("--port ") "the server port number (default 80)\n" + " -u " LONG_OPT("--user ") "the user name\n" + , revisionstr, datestr, argv[0]); + exit(1); + } + return res; +} + +static char encodingTable [64] = { + 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P', + 'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f', + 'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v', + 'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/' +}; + +/* does not buffer overrun, but breaks directly after an error */ +/* returns the number of required bytes */ +static int encode(char *buf, int size, char *user, char *pwd) +{ + unsigned char inbuf[3]; + char *out = buf; + int i, sep = 0, fill = 0, bytes = 0; + + while(*user || *pwd) + { + i = 0; + while(i < 3 && *user) inbuf[i++] = *(user++); + if(i < 3 && !sep) {inbuf[i++] = ':'; ++sep; } + while(i < 3 && *pwd) inbuf[i++] = *(pwd++); + while(i < 3) {inbuf[i++] = 0; ++fill; } + if(out-buf < size-1) + *(out++) = encodingTable[(inbuf [0] & 0xFC) >> 2]; + if(out-buf < size-1) + *(out++) = encodingTable[((inbuf [0] & 0x03) << 4) + | ((inbuf [1] & 0xF0) >> 4)]; + if(out-buf < size-1) + { + if(fill == 2) + *(out++) = '='; + else + *(out++) = encodingTable[((inbuf [1] & 0x0F) << 2) + | ((inbuf [2] & 0xC0) >> 6)]; + } + if(out-buf < size-1) + { + if(fill >= 1) + *(out++) = '='; + else + *(out++) = encodingTable[inbuf [2] & 0x3F]; + } + bytes += 4; + } + if(out-buf < size) + *out = 0; + return bytes; +} + +int main(int argc, char **argv) +{ + struct Args args; + + if(getargs(argc, argv, &args)) + { + int i, sockfd, numbytes; + char buf[MAXDATASIZE]; + struct hostent *he; + struct sockaddr_in their_addr; /* connector's address information */ + + if(!(he=gethostbyname(args.server))) + { + perror("gethostbyname"); + exit(1); + } + if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) + { + perror("socket"); + exit(1); + } + their_addr.sin_family = AF_INET; /* host byte order */ + their_addr.sin_port = htons(args.port); /* short, network byte order */ + their_addr.sin_addr = *((struct in_addr *)he->h_addr); + memset(&(their_addr.sin_zero), '\0', 8); + if(connect(sockfd, (struct sockaddr *)&their_addr, + sizeof(struct sockaddr)) == -1) + { + perror("connect"); + exit(1); + } + + if(!args.data) + { + i = snprintf(buf, MAXDATASIZE, + "GET / HTTP/1.0\r\n" + "User-Agent: %s/%s\r\n" +// "Accept: */*\r\n" +// "Connection: close\r\n" + "\r\n" + , AGENTSTRING, revisionstr); + } + else + { + i=snprintf(buf, MAXDATASIZE-40, /* leave some space for login */ + "GET /%s HTTP/1.0\r\n" + "User-Agent: %s%s \r\n" +// "Accept: */*\r\n" +// "Connection: close\r\n" + "Authorization: Basic " + , args.data, AGENTSTRING, revisionstr); + if(i > MAXDATASIZE-40 && i < 0) /* second check for old glibc */ + { + fprintf(stderr, "Requested data too long\n"); + exit(1); + } + i += encode(buf+i, MAXDATASIZE-i-5, args.user, args.password); + if(i > MAXDATASIZE-5) + { + fprintf(stderr, "Username and/or password too long\n"); + exit(1); + } + snprintf(buf+i, 5, "\r\n\r\n"); + i += 5; + } + if(send(sockfd, buf, i, 0) != i) + { + perror("send"); + exit(1); + } + if(args.data) + { + int k = 0; + while((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1) + { + if(!k) + { + if(numbytes != 12 || strncmp("ICY 200 OK\r\n", buf, 12)) + { + fprintf(stderr, "Could not get the requested data\n"); + exit(1); + } + ++k; + } + else + fwrite(buf, numbytes, 1, stdout); + } + } + else + { + while((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1) + { + fwrite(buf, numbytes, 1, stdout); + if(!strncmp("ENDSOURCETABLE\r\n", buf+numbytes-16, 16)) + break; + } + } + + close(sockfd); + } + return 0; +}