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/* CGI:IRC C Helper CGI
* Copyright (c) David Leadbeater 2002
* Released Under the GNU GPLv2 or Later
* NO WARRANTY - See GNU GPL for more
* $Id: client.c,v 1.9 2002/05/11 14:52:18 dgl Exp $
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
/* Change this to the tmpfile path set in the CGI:IRC Config */
#define TMPLOCATION "/tmp/cgiirc-"
int unix_connect(char *where);
int error(char *error);
int readinput(char *params);
int get_rand(char *params, char *rand);
int get_cookie(char *cookie);
int main(void) {
int fd;
char params[2048]; /* Keep input in here */
char rand[50]; /* Random value - used for the socket location */
char tmp[2148]; /* I decided to stop adding comments after here */
char cookie[100];
if(!readinput(params)) error("No input found\n");
if(!get_rand(params, rand)) error("Random Value not found\n");
if(get_cookie(cookie)) {
char tmp2[2148]; /* I'm sure there's a better way of doing this.. */
strncpy(tmp2, params, 2147);
snprintf(params, 2148, "COOKIE=%s&%s", cookie, tmp2);
}
fd = unix_connect(rand);
send(fd, params, strlen(params), 0);
send(fd, "\n", 1, 0);
while(read(fd, tmp, 2048) > 0) {
printf("%s",tmp);
}
return 1;
}
int error(char *error) {
printf("Content-type: text/html\n\n");
printf("An error occured: %s\n",error);
exit(1);
}
int readinput(char *params) {
char request[10];
if(!getenv("REQUEST_METHOD")) return 0;
strncpy(request, getenv("REQUEST_METHOD"), 9);
request[9] = 0;
if(!strlen(request)) return 0;
if(strncmp(request, "GET", 3) == 0) {
strncpy(params, getenv("QUERY_STRING"), 2048);
params[2048] = 0;
if(!strlen(params)) return 0;
return 1;
}else if(strncmp(request, "POST", 4) == 0) {
int length;
if(!getenv("CONTENT_LENGTH")) return 0;
length = atoi(getenv("CONTENT_LENGTH"));
if(!length || length == 0) return 0;
fread(params, length > 2048 ? 2048 : length, 1, stdin);
params[length] = 0;
return 1;
}else{
return 0;
}
}
int get_rand(char *params, char *rand) {
char *ptr, *end_ptr;
int r = 0, i = 0;
ptr = params;
end_ptr = ptr + strlen(ptr);
for(;ptr < end_ptr; ptr++) {
if(r == 1) {
if(*ptr == '&') break;
if(i > 48) break;
if(isalpha(*ptr) || isdigit(*ptr)) {
rand[i] = *ptr;
i++;
}
}else if(*ptr == 'R' && *(++ptr) == '=') {
r = 1;
}
}
rand[i] = 0;
if(r == 1 && strlen(rand)) return 1;
return 0;
}
int get_cookie(char *cookie) {
char ctmp[1024];
char *sptr, *end_ptr;
int i;
if(!getenv("HTTP_COOKIE")) return 0;
strncpy(ctmp, getenv("HTTP_COOKIE"), 1023);
sptr = strstr(ctmp, "cgiircauth=");
if(sptr == NULL) return 0;
if(strlen(sptr) < 12) return 0;
sptr += 11;
end_ptr = sptr + (strlen(sptr) < 99 ? strlen(sptr) : 99);
i = 0;
while((int)sptr < (int)end_ptr && *sptr != ';') {
cookie[i] = *sptr;
sptr++;
i++;
}
cookie[i] = '\0';
return 1;
}
int unix_connect(char *where) {
/*size_t size;*/
struct sockaddr_un saddr;
int sock, len;
char filename[100], errmsg[100];
len = strlen(TMPLOCATION) + strlen(where) + 6;
if(len > 100) error("Too long");
snprintf(filename, len, "%s%s/sock", TMPLOCATION, where);
filename[len] = 0;
sock = socket(AF_UNIX, SOCK_STREAM, 0);
if(sock == -1) error("socket() error\n");
saddr.sun_family = AF_UNIX;
strcpy(saddr.sun_path, filename);
if(connect(sock, (struct sockaddr *)&saddr, SUN_LEN(&saddr)) == -1) {
switch(errno) {
case EACCES:
error("Access Denied in connect()\n");
case ECONNREFUSED:
error("Connection refused in connect()\n");
case ENOENT:
error("No such file in connect()\n");
default:
snprintf(errmsg, 99, "Unhandled error in connect(): %s\n", strerror(errno));
error(errmsg);
}
}
return sock;
}
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