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/* $OpenBSD: check_http.c,v 1.2 2006/12/16 12:42:14 reyk Exp $ */
/*
* Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <net/if.h>
#include <sha1.h>
#include <limits.h>
#include <event.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "hostated.h"
struct buf *http_request(struct host *, struct table *, int, const char *);
struct buf *
http_request(struct host *host, struct table *table, int s, const char *req)
{
int fl;
ssize_t sz;
char rbuf[1024];
struct buf *buf;
if ((fl = fcntl(s, F_GETFL, 0)) == -1)
fatal("http_request: cannot get flags for socket");
if (fcntl(s, F_SETFL, fl & ~(O_NONBLOCK)) == -1)
fatal("http_request: cannot set blocking socket");
if ((buf = buf_dynamic(sizeof(rbuf), UINT_MAX)) == NULL)
fatalx("http_request: cannot create dynamic buffer");
if (write(s, req, strlen(req)) != (ssize_t) strlen(req)) {
close(s);
return (NULL);
}
for (; (sz = read(s, rbuf, sizeof(rbuf))) != 0; ) {
if (sz == -1)
fatal("http_request: read");
if (buf_add(buf, rbuf, sz) == -1)
fatal("http_request: buf_add");
}
return (buf);
}
int
check_http_code(struct host *host, struct table *table)
{
int s;
int code;
char scode[4];
char *req;
char *head;
const char *estr;
struct buf *buf;
if ((s = tcp_connect(host, table)) <= 0)
return (s);
asprintf(&req, "HEAD %s HTTP/1.0\r\n\r\n", table->path);
if ((buf = http_request(host, table, s, req)) == NULL)
return (HOST_UNKNOWN);
free(req);
head = buf->buf;
if (strncmp(head, "HTTP/1.1 ", strlen("HTTP/1.1 ")) &&
strncmp(head, "HTTP/1.0 ", strlen("HTTP/1.0 "))) {
log_debug("check_http_code: cannot parse HTTP version");
close(s);
return (HOST_DOWN);
}
head += strlen("HTTP/1.1 ");
if (strlen(head) < 5) /* code + \r\n */
return (HOST_DOWN);
strlcpy(scode, head, sizeof(scode));
code = strtonum(scode, 100, 999, &estr);
if (estr != NULL) {
log_debug("check_http_code: cannot parse HTTP code");
close(s);
return (HOST_DOWN);
}
if (code != table->retcode) {
log_debug("check_http_code: invalid HTTP code returned");
close(s);
return (HOST_DOWN);
}
close(s);
return (HOST_UP);
}
int
check_http_digest(struct host *host, struct table *table)
{
int s;
char *head;
char *req;
struct buf *buf;
char digest[(SHA1_DIGEST_LENGTH*2)+1];
if ((s = tcp_connect(host, table)) <= 0)
return (s);
asprintf(&req, "GET %s HTTP/1.0\r\n\r\n", table->path);
if ((buf = http_request(host, table, s, req)) == NULL)
return (HOST_UNKNOWN);
free(req);
head = buf->buf;
if ((head = strstr(head, "\r\n\r\n")) == NULL) {
log_debug("check_http_digest: host %u no end of headers",
host->id);
close(s);
return (HOST_DOWN);
}
head += strlen("\r\n\r\n");
SHA1Data(head, strlen(head), digest);
close(s);
buf_free(buf);
if (strcmp(table->digest, digest)) {
log_warnx("check_http_digest: wrong digest for host %u",
host->id);
return (HOST_DOWN);
}
return (HOST_UP);
}
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