1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2018 Nexenta Systems, Inc. All rights reserved.
25 */
26
27 /*
28 * Functions to get list of addresses (TCP and/or NetBIOS)
29 */
30
31 #include <errno.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <strings.h>
36 #include <unistd.h>
37 #include <netdb.h>
38 #include <libintl.h>
39 #include <xti.h>
40 #include <assert.h>
41
42 #include <sys/types.h>
43 #include <sys/time.h>
44 #include <sys/byteorder.h>
45 #include <sys/socket.h>
46 #include <sys/fcntl.h>
47
48 #include <netinet/in.h>
49 #include <netinet/tcp.h>
50 #include <arpa/inet.h>
51
52 #include <netsmb/smb.h>
53 #include <netsmb/smb_lib.h>
54 #include <netsmb/netbios.h>
55 #include <netsmb/nb_lib.h>
56 #include <netsmb/smb_dev.h>
57
58 #include "charsets.h"
59 #include "private.h"
60
61 static char smb_port[16] = "445";
62
63 void
64 dump_addrinfo(struct addrinfo *ai)
65 {
66 int i;
67
68 if (ai == NULL) {
69 printf("ai==NULL\n");
70 return;
71 }
72
73 for (i = 0; ai; i++, ai = ai->ai_next) {
74 printf("ai[%d]: af=%d, len=%d", i,
75 ai->ai_family, ai->ai_addrlen);
76 dump_sockaddr(ai->ai_addr);
77 if (ai->ai_canonname) {
78 printf("ai[%d]: cname=\"%s\"\n",
79 i, ai->ai_canonname);
80 }
81 }
82 }
83
84 void
85 dump_sockaddr(struct sockaddr *sa)
86 {
87 char paddrbuf[INET6_ADDRSTRLEN];
88 struct sockaddr_in *sin;
89 struct sockaddr_in6 *sin6;
90 int af = sa->sa_family;
91 const char *ip;
92
93 printf(" saf=%d,", af);
94 switch (af) {
95 case AF_NETBIOS: /* see nbns_rq.c */
96 case AF_INET:
97 sin = (void *)sa;
98 ip = inet_ntop(AF_INET, &sin->sin_addr,
99 paddrbuf, sizeof (paddrbuf));
100 break;
101 case AF_INET6:
102 sin6 = (void *)sa;
103 ip = inet_ntop(AF_INET6, &sin6->sin6_addr,
104 paddrbuf, sizeof (paddrbuf));
105 break;
106 default:
107 ip = "?";
108 break;
109 }
110 printf(" IP=%s\n", ip);
111 }
112
113
114 /*
115 * SMB client name resolution - normal, and/or NetBIOS.
116 * Returns an EAI_xxx error number like getaddrinfo(3)
117 */
118 int
119 smb_ctx_getaddr(struct smb_ctx *ctx)
120 {
121 struct nb_ctx *nbc = ctx->ct_nb;
122 struct addrinfo hints, *res;
123 char *srvaddr_str;
124 int gaierr;
125
126 if (ctx->ct_fullserver == NULL || ctx->ct_fullserver[0] == '\0')
127 return (EAI_NONAME);
128
129 if (ctx->ct_addrinfo != NULL) {
130 freeaddrinfo(ctx->ct_addrinfo);
131 ctx->ct_addrinfo = NULL;
132 }
133
134 /*
135 * If the user specified an address, use it,
136 * and don't do NetBIOS lookup.
137 */
138 if (ctx->ct_srvaddr_s) {
139 srvaddr_str = ctx->ct_srvaddr_s;
140 nbc->nb_flags &= ~NBCF_NS_ENABLE;
141 } else
142 srvaddr_str = ctx->ct_fullserver;
143
144 /*
145 * Default the server name we'll use in the
146 * protocol (i.e. NTLM, tree connect).
147 */
148 strlcpy(ctx->ct_srvname, ctx->ct_fullserver,
149 sizeof (ctx->ct_srvname));
150
151 /*
152 * Try to lookup the host address using the
153 * normal name-to-IP address mechanisms.
154 * If that fails, we MAY try NetBIOS.
155 */
156 memset(&hints, 0, sizeof (hints));
157 hints.ai_flags = AI_CANONNAME;
158 hints.ai_family = PF_UNSPEC;
159 hints.ai_socktype = SOCK_STREAM;
160 gaierr = getaddrinfo(srvaddr_str, smb_port, &hints, &res);
161 if (gaierr == 0) {
162 ctx->ct_addrinfo = res;
163 return (0);
164 }
165
166 /*
167 * If we really want to support NetBIOS, we should add
168 * an AF_NETBIOS entry to the address list here.
169 * For now, let's just skip NetBIOS.
170 * (Can we just kill NetBIOS? Please? :)
171 */
172 #if 0 /* XXX Just kill NetBIOS? */
173 /*
174 * If regular IP name lookup failed, try NetBIOS,
175 * but only if given a valid NetBIOS name and if
176 * NetBIOS name lookup is enabled.
177 */
178 if (nbc->nb_flags & NBCF_NS_ENABLE) {
179 int gaierr2 = nbns_getaddrinfo(ctx->ct_fullserver, nbc, &res);
180 if (gaierr2 == 0) {
181 if (res->ai_canonname)
182 strlcpy(ctx->ct_srvname,
183 res->ai_canonname,
184 sizeof (ctx->ct_srvname));
185 ctx->ct_addrinfo = res;
186 return (0);
187 }
188 }
189 #endif
190
191 /*
192 * Return the original error from getaddrinfo
193 */
194 if (smb_verbose) {
195 smb_error(dgettext(TEXT_DOMAIN,
196 "getaddrinfo: %s: %s"), 0,
197 ctx->ct_fullserver,
198 gai_strerror(gaierr));
199 }
200 return (gaierr);
201 }