Index: /trunk/ntripclient/NtripLinuxClient.c
===================================================================
--- /trunk/ntripclient/NtripLinuxClient.c	(revision 3)
+++ /trunk/ntripclient/NtripLinuxClient.c	(revision 3)
@@ -0,0 +1,288 @@
+/*
+  Easy example NTRIP client for Linux/Unix.
+  Copyright (C) 2003 by Dirk Stoecker <stoecker@epost.de>
+    
+  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 <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+
+/* 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: 1.1 $";
+static char datestr[]     = "$Date: 2003/08/21 13:38:47 $";
+
+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;
+}
