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/**********************************************************************
* csoget.c -- make a CSO request look like an MITdir finger query
*
* Copyright 1994 by the Massachusetts Institute of Technology
* For copying and distribution information, please see the file
* <mit-copyright.h>.
**********************************************************************/
#include "mit-copyright.h"
static char rcsid[]="$Header: /mit/wwwdev/src/cgi/RCS/csoget.c,v 1.11 1998/01/26 20:34:11 brlewis Exp $";
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <string.h>
#include <ctype.h>
#define WRITE_OR_CONT(fd, buf, nbytes) if (write(fd, buf, nbytes) < 0) continue
int
csoget(query, host, origbuf, origbufsize)
char *query, *host, *origbuf;
int origbufsize;
{
struct hostent *hp;
struct sockaddr_in sname;
u_short portnum;
int sock, red=1, total=0, bufsize;
char *remote_addr;
char *buf;
/* resolve hostname */
hp = gethostbyname(host);
if (!hp) return(-1);
/* build socket name for connect() */
memset(&sname, 0, sizeof(sname));
sname.sin_family = AF_INET;
memcpy(&(sname.sin_addr), hp->h_addr, hp->h_length);
/* Try port 106 first (MITdir limiter), then 105 (standard port) */
for (portnum=108; portnum >= 105; portnum -= 3)
{
sname.sin_port = htons(portnum);
/* create socket */
sock = socket(PF_INET, SOCK_STREAM, 0);
/* connect */
if (connect(sock, (struct sockaddr *)&sname, sizeof(sname)) < 0)
continue;
/* send ident */
remote_addr = getenv("REMOTE_ADDR");
if (remote_addr)
{
WRITE_OR_CONT(sock, "id NET ", 7);
WRITE_OR_CONT(sock, remote_addr, strlen(remote_addr));
WRITE_OR_CONT(sock, "\n", 1);
}
/* get motd */
WRITE_OR_CONT(sock, "help web motd\n", 14);
/* send query */
WRITE_OR_CONT(sock, "query ", 6);
WRITE_OR_CONT(sock, query, strlen(query));
WRITE_OR_CONT(sock, "\nquit\n", 6);
/* receive result */
buf=origbuf;
bufsize=origbufsize;
do
{
/* read more bytes into remaining buffer */
red = read(sock, buf, bufsize);
if (red > 0)
{
buf += red;
bufsize -= red;
total += red;
}
} while(bufsize > 1 && red > 0);
/* Write end-of-string marker */
buf[0] = '\0';
close(sock);
/*
* Return success except for read error
* or "Query refused" (an MITdir vagary)
*/
if (red == 0 && !strstr(origbuf, "Query refused")) return(total);
}
return(-1);
}
/* Clean up the CSO results to look more like a finger query. */
int
finger(query, host, buf, bufsize)
char *query, *host, *buf;
int bufsize;
{
char *textline1, *textline2, *colon1, *colon2;
int old_seq=0, new_seq=0, repeat_line=0;
/* Get the raw CSO results */
if (csoget(query, host, buf, bufsize) == -1) return(-1);
/* MITdir vagary: Results might already be cleaned up */
if (!isdigit(buf[0]) && buf[0] != '-') return(strlen(buf));
/* Clean each line */
for(textline1=buf;
textline1 > (char *) 1;
textline1=strchr(textline1, '\012' /* LF */) + 1)
{
do
{
repeat_line=0;
colon1=strpbrk(textline1, ":\012");
if (!colon1 || *colon1 == '\012') continue;
if (!strncmp(colon1-3, "200", 3)) /* query results */
{
colon2=strpbrk(1+colon1, ":\012");
if (!colon2 || *colon2 == '\012' /* "Ok." or "Bye!" */
|| !strncmp(colon2, ":motd:", 6)) /* skip motd */
{
textline2=strchr(1+colon1, '\012' /* LF */);
if (textline2)
{
/* Remove everything */
strcpy(textline1, textline2+1);
repeat_line=1; /* don't skip a line */
}
else
{
*textline1='\0';
break;
}
}
else
{
/* insert extra newline beginning of each result */
new_seq=atoi(1+colon1);
if (old_seq != new_seq)
{
old_seq = new_seq;
*(textline1++) = '\012';
}
/* Skip the -200:4: part */
strcpy(textline1, 1+colon2);
}
}
else
{
/* Line like "102:There was 1 match to your request"
or error or whatever */
strcpy(textline1, 1+colon1);
}
} while (repeat_line && *textline1);
}
return(strlen(buf));
}
#ifdef TEST_CSOGET
main(argc, argv)
int argc;
char *argv[];
{
char buf[BUFSIZ];
static char *sep="--------------------------------------------------------";
puts(sep);
csoget(argv[1], argv[2], buf, BUFSIZ);
puts(buf);
puts(sep);
finger(argv[1], argv[2], buf, BUFSIZ);
puts(buf);
puts(sep);
exit(0);
}
#endif
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