diff options
Diffstat (limited to 'crypto/kerberosIV/lib/roken/roken_gethostby.c')
| -rw-r--r-- | crypto/kerberosIV/lib/roken/roken_gethostby.c | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/crypto/kerberosIV/lib/roken/roken_gethostby.c b/crypto/kerberosIV/lib/roken/roken_gethostby.c deleted file mode 100644 index 8eb2325..0000000 --- a/crypto/kerberosIV/lib/roken/roken_gethostby.c +++ /dev/null @@ -1,280 +0,0 @@ -/* - * Copyright (c) 1998 Kungliga Tekniska Högskolan - * (Royal Institute of Technology, Stockholm, Sweden). - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the Institute nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -RCSID("$Id: roken_gethostby.c,v 1.4 1999/12/02 16:58:52 joda Exp $"); -#endif - -#include <roken.h> -#ifdef HAVE_NETDB_H -#include <netdb.h> -#endif -#ifdef HAVE_ARPA_INET_H -#include <arpa/inet.h> -#endif - -#undef roken_gethostbyname -#undef roken_gethostbyaddr - -static struct sockaddr_in dns_addr; -static char *dns_req; - -static int -make_address(const char *address, struct in_addr *ip) -{ - if(inet_aton(address, ip) == 0){ - /* try to resolve as hostname, it might work if the address we - are trying to lookup is local, for instance a web proxy */ - struct hostent *he = gethostbyname(address); - if(he) { - unsigned char *p = (unsigned char*)he->h_addr; - ip->s_addr = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; - } else { - return -1; - } - } - return 0; -} - -static int -setup_int(const char *proxy_host, short proxy_port, - const char *dns_host, short dns_port, - const char *dns_path) -{ - memset(&dns_addr, 0, sizeof(dns_addr)); - if(dns_req) - free(dns_req); - if(proxy_host) { - if(make_address(proxy_host, &dns_addr.sin_addr) != 0) - return -1; - dns_addr.sin_port = htons(proxy_port); - asprintf(&dns_req, "http://%s:%d%s", dns_host, dns_port, dns_path); - } else { - if(make_address(dns_host, &dns_addr.sin_addr) != 0) - return -1; - dns_addr.sin_port = htons(dns_port); - asprintf(&dns_req, "%s", dns_path); - } - dns_addr.sin_family = AF_INET; - return 0; -} - -static void -split_spec(const char *spec, char **host, int *port, char **path, int def_port) -{ - char *p; - *host = strdup(spec); - p = strchr(*host, ':'); - if(p) { - *p++ = '\0'; - if(sscanf(p, "%d", port) != 1) - *port = def_port; - } else - *port = def_port; - p = strchr(p ? p : *host, '/'); - if(p) { - if(path) - *path = strdup(p); - *p = '\0'; - }else - if(path) - *path = NULL; -} - - -int -roken_gethostby_setup(const char *proxy_spec, const char *dns_spec) -{ - char *proxy_host = NULL; - int proxy_port; - char *dns_host, *dns_path; - int dns_port; - - int ret = -1; - - split_spec(dns_spec, &dns_host, &dns_port, &dns_path, 80); - if(dns_path == NULL) - goto out; - if(proxy_spec) - split_spec(proxy_spec, &proxy_host, &proxy_port, NULL, 80); - ret = setup_int(proxy_host, proxy_port, dns_host, dns_port, dns_path); -out: - free(proxy_host); - free(dns_host); - free(dns_path); - return ret; -} - - -/* Try to lookup a name or an ip-address using http as transport - mechanism. See the end of this file for an example program. */ -static struct hostent* -roken_gethostby(const char *hostname) -{ - int s; - struct sockaddr_in sin; - char *request; - char buf[1024]; - int offset = 0; - int n; - char *p, *foo; - - if(dns_addr.sin_family == 0) - return NULL; /* no configured host */ - sin = dns_addr; - asprintf(&request, "GET %s?%s HTTP/1.0\r\n\r\n", dns_req, hostname); - if(request == NULL) - return NULL; - s = socket(AF_INET, SOCK_STREAM, 0); - if(s < 0) { - free(request); - return NULL; - } - if(connect(s, (struct sockaddr*)&sin, sizeof(sin)) < 0) { - close(s); - free(request); - return NULL; - } - if(write(s, request, strlen(request)) != strlen(request)) { - close(s); - free(request); - return NULL; - } - free(request); - while(1) { - n = read(s, buf + offset, sizeof(buf) - offset); - if(n <= 0) - break; - offset += n; - } - buf[offset] = '\0'; - close(s); - p = strstr(buf, "\r\n\r\n"); /* find end of header */ - if(p) p += 4; - else return NULL; - foo = NULL; - p = strtok_r(p, " \t\r\n", &foo); - if(p == NULL) - return NULL; - { - /* make a hostent to return */ -#define MAX_ADDRS 16 - static struct hostent he; - static char addrs[4 * MAX_ADDRS]; - static char *addr_list[MAX_ADDRS]; - int num_addrs = 0; - - he.h_name = p; - he.h_aliases = NULL; - he.h_addrtype = AF_INET; - he.h_length = 4; - - while((p = strtok_r(NULL, " \t\r\n", &foo)) && num_addrs < MAX_ADDRS) { - struct in_addr ip; - inet_aton(p, &ip); - ip.s_addr = ntohl(ip.s_addr); - addr_list[num_addrs] = &addrs[num_addrs * 4]; - addrs[num_addrs * 4 + 0] = (ip.s_addr >> 24) & 0xff; - addrs[num_addrs * 4 + 1] = (ip.s_addr >> 16) & 0xff; - addrs[num_addrs * 4 + 2] = (ip.s_addr >> 8) & 0xff; - addrs[num_addrs * 4 + 3] = (ip.s_addr >> 0) & 0xff; - addr_list[++num_addrs] = NULL; - } - he.h_addr_list = addr_list; - return &he; - } -} - -struct hostent* -roken_gethostbyname(const char *hostname) -{ - struct hostent *he; - he = gethostbyname(hostname); - if(he) - return he; - return roken_gethostby(hostname); -} - -struct hostent* -roken_gethostbyaddr(const void *addr, size_t len, int type) -{ - struct in_addr a; - const char *p; - struct hostent *he; - he = gethostbyaddr(addr, len, type); - if(he) - return he; - if(type != AF_INET || len != 4) - return NULL; - p = addr; - a.s_addr = htonl((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); - return roken_gethostby(inet_ntoa(a)); -} - -#if 0 - -/* this program can be used as a cgi `script' to lookup names and - ip-addresses */ - -#include <stdio.h> -#include <stdlib.h> -#include <netdb.h> -#include <sys/param.h> - -int -main(int argc, char **argv) -{ - char *query = getenv("QUERY_STRING"); - char host[MAXHOSTNAMELEN]; - int i; - struct hostent *he; - - printf("Content-type: text/plain\n\n"); - if(query == NULL) - exit(0); - he = gethostbyname(query); - strncpy(host, he->h_name, sizeof(host)); - host[sizeof(host) - 1] = '\0'; - he = gethostbyaddr(he->h_addr, he->h_length, AF_INET); - printf("%s\n", he->h_name); - for(i = 0; he->h_addr_list[i]; i++) { - struct in_addr ip; - unsigned char *p = (unsigned char*)he->h_addr_list[i]; - ip.s_addr = htonl((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); - printf("%s\n", inet_ntoa(ip)); - } - exit(0); -} - -#endif |
