Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 292 insertions, 0 deletions

diff --git a/third_party/heimdal/lib/roken/roken_gethostby.c b/third_party/heimdal/lib/roken/roken_gethostby.c
new file mode 100644
index 0000000..a2febd0
--- /dev/null
+++ b/third_party/heimdal/lib/roken/roken_gethostby.c
@@ -0,0 +1,292 @@
+/*
+ * 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.
+ */
+
+#include <config.h>
+
+#include "roken.h"
+
+#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);
+    dns_req = NULL;
+    if(proxy_host) {
+	if(make_address(proxy_host, &dns_addr.sin_addr) != 0)
+	    return -1;
+	dns_addr.sin_port = htons(proxy_port);
+	if (asprintf(&dns_req, "http://%s:%d%s", dns_host, dns_port, dns_path) < 0)
+	    return -1;
+    } else {
+	if(make_address(dns_host, &dns_addr.sin_addr) != 0)
+	    return -1;
+	dns_addr.sin_port = htons(dns_port);
+	if (asprintf(&dns_req, "%s", dns_path) < 0)
+	    return -1;
+    }
+    dns_addr.sin_family = AF_INET;
+    return 0;
+}
+
+static int
+split_spec(const char *spec, char **host, int *port, char **path, int def_port)
+{
+    char *p;
+    *host = strdup(spec);
+    if (*host == NULL)
+	return -1;
+    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);
+	    if (*path == NULL) {
+		free(*host);
+		*host = NULL;
+		return -1;
+	    }
+	}
+	*p = '\0';
+    }else
+	if(path)
+	    *path = NULL;
+    return 0;
+}
+
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+roken_gethostby_setup(const char *proxy_spec, const char *dns_spec)
+{
+    char *proxy_host = NULL;
+    int proxy_port = 0;
+    char *dns_host = NULL, *dns_path = NULL;
+    int dns_port;
+    int ret;
+
+    ret = split_spec(dns_spec, &dns_host, &dns_port, &dns_path, 80);
+    if(ret)
+	goto out;
+    if(proxy_spec) {
+	ret = split_spec(proxy_spec, &proxy_host, &proxy_port, NULL, 80);
+	if (ret)
+	    goto out;
+    }
+    ret = setup_int(proxy_host, proxy_port, dns_host, dns_port, dns_path);
+    if (ret)
+	goto out;
+
+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 addr;
+    char *request = NULL;
+    char buf[1024];
+    int offset = 0;
+    int n;
+    char *p, *foo;
+    size_t len;
+
+    if(dns_addr.sin_family == 0)
+	return NULL; /* no configured host */
+    addr = dns_addr;
+    if (asprintf(&request, "GET %s?%s HTTP/1.0\r\n\r\n", dns_req, hostname) < 0)
+	return NULL;
+    if(request == NULL)
+	return NULL;
+    s  = socket(AF_INET, SOCK_STREAM, 0);
+    if(s < 0) {
+	free(request);
+	return NULL;
+    }
+    if(connect(s, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+	close(s);
+	free(request);
+	return NULL;
+    }
+
+    len = strlen(request);
+    if(write(s, request, len) != (ssize_t)len) {
+	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 + 1];
+	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;
+    }
+}
+
+ROKEN_LIB_FUNCTION struct hostent* ROKEN_LIB_CALL
+roken_gethostbyname(const char *hostname)
+{
+    struct hostent *he;
+    he = gethostbyname(hostname);
+    if(he)
+	return he;
+    return roken_gethostby(hostname);
+}
+
+ROKEN_LIB_FUNCTION struct hostent* ROKEN_LIB_CALL
+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