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Diffstat (limited to 'third_party/heimdal/lib/roken/getaddrinfo.c')
-rw-r--r--third_party/heimdal/lib/roken/getaddrinfo.c414
1 files changed, 414 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/roken/getaddrinfo.c b/third_party/heimdal/lib/roken/getaddrinfo.c
new file mode 100644
index 0000000..47affba
--- /dev/null
+++ b/third_party/heimdal/lib/roken/getaddrinfo.c
@@ -0,0 +1,414 @@
+/*
+ * Copyright (c) 1999 - 2001 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"
+
+/*
+ * uses hints->ai_socktype and hints->ai_protocol
+ */
+
+static int
+get_port_protocol_socktype (const char *servname,
+ const struct addrinfo *hints,
+ int *port,
+ int *protocol,
+ int *socktype)
+{
+ struct servent *se;
+ const char *proto_str = NULL;
+
+ *socktype = 0;
+
+ if (hints != NULL && hints->ai_protocol != 0) {
+ struct protoent *protoent = getprotobynumber (hints->ai_protocol);
+
+ if (protoent == NULL)
+ return EAI_SOCKTYPE; /* XXX */
+
+ proto_str = protoent->p_name;
+ *protocol = protoent->p_proto;
+ }
+
+ if (hints != NULL)
+ *socktype = hints->ai_socktype;
+
+ if (*socktype == SOCK_STREAM) {
+ se = getservbyname (servname, proto_str ? proto_str : "tcp");
+ if (proto_str == NULL)
+ *protocol = IPPROTO_TCP;
+ } else if (*socktype == SOCK_DGRAM) {
+ se = getservbyname (servname, proto_str ? proto_str : "udp");
+ if (proto_str == NULL)
+ *protocol = IPPROTO_UDP;
+ } else if (*socktype == 0) {
+ if (proto_str != NULL) {
+ se = getservbyname (servname, proto_str);
+ } else {
+ se = getservbyname (servname, "tcp");
+ *protocol = IPPROTO_TCP;
+ *socktype = SOCK_STREAM;
+ if (se == NULL) {
+ se = getservbyname (servname, "udp");
+ *protocol = IPPROTO_UDP;
+ *socktype = SOCK_DGRAM;
+ }
+ }
+ } else
+ return EAI_SOCKTYPE;
+
+ if (se == NULL) {
+ char *endstr;
+
+ *port = htons(strtol (servname, &endstr, 10));
+ if (servname == endstr)
+ return EAI_NONAME;
+ } else {
+ *port = se->s_port;
+ }
+ return 0;
+}
+
+static int
+add_one (int port, int protocol, int socktype,
+ struct addrinfo ***ptr,
+ int (*func)(struct addrinfo *, void *data, int port),
+ void *data,
+ char *canonname)
+{
+ struct addrinfo *a;
+ int ret;
+
+ a = malloc (sizeof (*a));
+ if (a == NULL)
+ return EAI_MEMORY;
+ memset (a, 0, sizeof(*a));
+ a->ai_flags = 0;
+ a->ai_next = NULL;
+ a->ai_protocol = protocol;
+ a->ai_socktype = socktype;
+ a->ai_canonname = canonname;
+ ret = (*func)(a, data, port);
+ if (ret) {
+ free (a);
+ return ret;
+ }
+ **ptr = a;
+ *ptr = &a->ai_next;
+ return 0;
+}
+
+static int
+const_v4 (struct addrinfo *a, void *data, int port)
+{
+ struct sockaddr_in *sin4;
+ struct in_addr *addr = (struct in_addr *)data;
+
+ a->ai_family = PF_INET;
+ a->ai_addrlen = sizeof(*sin4);
+ a->ai_addr = malloc (sizeof(*sin4));
+ if (a->ai_addr == NULL)
+ return EAI_MEMORY;
+ sin4 = (struct sockaddr_in *)a->ai_addr;
+ memset (sin4, 0, sizeof(*sin4));
+ sin4->sin_family = AF_INET;
+ sin4->sin_port = port;
+ sin4->sin_addr = *addr;
+ return 0;
+}
+
+#ifdef HAVE_IPV6
+static int
+const_v6 (struct addrinfo *a, void *data, int port)
+{
+ struct sockaddr_in6 *sin6;
+ struct in6_addr *addr = (struct in6_addr *)data;
+
+ a->ai_family = PF_INET6;
+ a->ai_addrlen = sizeof(*sin6);
+ a->ai_addr = malloc (sizeof(*sin6));
+ if (a->ai_addr == NULL)
+ return EAI_MEMORY;
+ sin6 = (struct sockaddr_in6 *)a->ai_addr;
+ memset (sin6, 0, sizeof(*sin6));
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = port;
+ sin6->sin6_addr = *addr;
+ return 0;
+}
+#endif
+
+/* this is mostly a hack for some versions of AIX that has a prototype
+ for in6addr_loopback but no actual symbol in libc */
+#if defined(HAVE_IPV6) && !defined(HAVE_IN6ADDR_LOOPBACK) && defined(IN6ADDR_LOOPBACK_INIT)
+#define in6addr_loopback _roken_in6addr_loopback
+struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
+#endif
+
+static int
+get_null (const struct addrinfo *hints,
+ int port, int protocol, int socktype,
+ struct addrinfo **res)
+{
+ struct in_addr v4_addr;
+#ifdef HAVE_IPV6
+ struct in6_addr v6_addr;
+#endif
+ struct addrinfo *first = NULL;
+ struct addrinfo **current = &first;
+ int family = PF_UNSPEC;
+ int ret = EAI_FAMILY;
+
+ if (hints != NULL)
+ family = hints->ai_family;
+
+ if (hints && hints->ai_flags & AI_PASSIVE) {
+ v4_addr.s_addr = INADDR_ANY;
+#ifdef HAVE_IPV6
+ v6_addr = in6addr_any;
+#endif
+ } else {
+ v4_addr.s_addr = htonl(INADDR_LOOPBACK);
+#ifdef HAVE_IPV6
+ v6_addr = in6addr_loopback;
+#endif
+ }
+
+#ifdef HAVE_IPV6
+ if (family == PF_INET6 || family == PF_UNSPEC) {
+ ret = add_one (port, protocol, socktype,
+ &current, const_v6, &v6_addr, NULL);
+ }
+#endif
+ if (family == PF_INET || family == PF_UNSPEC) {
+ ret = add_one (port, protocol, socktype,
+ &current, const_v4, &v4_addr, NULL);
+ }
+ *res = first;
+ return ret;
+}
+
+static int
+add_hostent (int port, int protocol, int socktype,
+ struct addrinfo ***current,
+ int (*func)(struct addrinfo *, void *data, int port),
+ struct hostent *he, int *flags)
+{
+ int ret;
+ char *canonname = NULL;
+ char **h;
+
+ if (*flags & AI_CANONNAME) {
+ struct hostent *he2 = NULL;
+ const char *tmp_canon;
+
+ tmp_canon = hostent_find_fqdn (he);
+ if (strchr (tmp_canon, '.') == NULL) {
+ int error;
+
+ he2 = getipnodebyaddr (he->h_addr_list[0], he->h_length,
+ he->h_addrtype, &error);
+ if (he2 != NULL) {
+ const char *tmp = hostent_find_fqdn (he2);
+
+ if (strchr (tmp, '.') != NULL)
+ tmp_canon = tmp;
+ }
+ }
+
+ canonname = strdup (tmp_canon);
+ if (he2 != NULL)
+ freehostent (he2);
+ if (canonname == NULL)
+ return EAI_MEMORY;
+ }
+
+ for (h = he->h_addr_list; *h != NULL; ++h) {
+ ret = add_one (port, protocol, socktype,
+ current, func, *h, canonname);
+ if (ret)
+ return ret;
+ if (*flags & AI_CANONNAME) {
+ *flags &= ~AI_CANONNAME;
+ canonname = NULL;
+ }
+ }
+ return 0;
+}
+
+static int
+get_number (const char *nodename,
+ const struct addrinfo *hints,
+ int port, int protocol, int socktype,
+ struct addrinfo **res)
+{
+ struct addrinfo *first = NULL;
+ struct addrinfo **current = &first;
+ int family = PF_UNSPEC;
+ int ret;
+
+ if (hints != NULL) {
+ family = hints->ai_family;
+ }
+
+#ifdef HAVE_IPV6
+ if (family == PF_INET6 || family == PF_UNSPEC) {
+ struct in6_addr v6_addr;
+
+ if (inet_pton (PF_INET6, nodename, &v6_addr) == 1) {
+ ret = add_one (port, protocol, socktype,
+ &current, const_v6, &v6_addr, NULL);
+ *res = first;
+ return ret;
+ }
+ }
+#endif
+ if (family == PF_INET || family == PF_UNSPEC) {
+ struct in_addr v4_addr;
+
+ if (inet_pton (PF_INET, nodename, &v4_addr) == 1) {
+ ret = add_one (port, protocol, socktype,
+ &current, const_v4, &v4_addr, NULL);
+ *res = first;
+ return ret;
+ }
+ }
+ return EAI_NONAME;
+}
+
+static int
+get_nodes (const char *nodename,
+ const struct addrinfo *hints,
+ int port, int protocol, int socktype,
+ struct addrinfo **res)
+{
+ struct addrinfo *first = NULL;
+ struct addrinfo **current = &first;
+ int family = PF_UNSPEC;
+ int flags = 0;
+ int ret = EAI_NONAME;
+ int error;
+
+ if (hints != NULL) {
+ family = hints->ai_family;
+ flags = hints->ai_flags;
+ }
+
+#ifdef HAVE_IPV6
+ if (family == PF_INET6 || family == PF_UNSPEC) {
+ struct hostent *he;
+
+ he = getipnodebyname (nodename, PF_INET6, 0, &error);
+
+ if (he != NULL) {
+ ret = add_hostent (port, protocol, socktype,
+ &current, const_v6, he, &flags);
+ freehostent (he);
+ }
+ }
+#endif
+ if (family == PF_INET || family == PF_UNSPEC) {
+ struct hostent *he;
+
+ he = getipnodebyname (nodename, PF_INET, 0, &error);
+
+ if (he != NULL) {
+ ret = add_hostent (port, protocol, socktype,
+ &current, const_v4, he, &flags);
+ freehostent (he);
+ }
+ }
+ *res = first;
+ return ret;
+}
+
+/*
+ * hints:
+ *
+ * struct addrinfo {
+ * int ai_flags;
+ * int ai_family;
+ * int ai_socktype;
+ * int ai_protocol;
+ * ...
+ * };
+ */
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+rk_getaddrinfo(const char *nodename,
+ const char *servname,
+ const struct addrinfo *hints,
+ struct addrinfo **res)
+{
+ int ret;
+ int port = 0;
+ int protocol = 0;
+ int socktype = 0;
+
+ *res = NULL;
+
+ if (servname == NULL && nodename == NULL)
+ return EAI_NONAME;
+
+ if (hints != NULL
+ && hints->ai_family != PF_UNSPEC
+ && hints->ai_family != PF_INET
+#ifdef HAVE_IPV6
+ && hints->ai_family != PF_INET6
+#endif
+ )
+ return EAI_FAMILY;
+
+ if (servname != NULL) {
+ ret = get_port_protocol_socktype (servname, hints,
+ &port, &protocol, &socktype);
+ if (ret)
+ return ret;
+ }
+ if (nodename != NULL) {
+ ret = get_number (nodename, hints, port, protocol, socktype, res);
+ if (ret) {
+ if(hints && hints->ai_flags & AI_NUMERICHOST)
+ ret = EAI_NONAME;
+ else
+ ret = get_nodes (nodename, hints, port, protocol, socktype,
+ res);
+ }
+ } else {
+ ret = get_null (hints, port, protocol, socktype, res);
+ }
+ if (ret)
+ rk_freeaddrinfo(*res);
+ return ret;
+}
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