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 */
25
26 /*
27 * Functions to get list of addresses (TCP and/or NetBIOS)
28 */
29
30 #include <errno.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <strings.h>
35 #include <unistd.h>
36 #include <netdb.h>
37 #include <libintl.h>
38 #include <xti.h>
39 #include <assert.h>
40
41 #include <sys/types.h>
42 #include <sys/time.h>
43 #include <sys/byteorder.h>
44 #include <sys/socket.h>
45 #include <sys/fcntl.h>
46
47 #include <netinet/in.h>
48 #include <netinet/tcp.h>
49 #include <arpa/inet.h>
50
51 #include <netsmb/smb.h>
52 #include <netsmb/smb_lib.h>
53 #include <netsmb/netbios.h>
54 #include <netsmb/nb_lib.h>
55 #include <netsmb/smb_dev.h>
56
57 #include "charsets.h"
58 #include "private.h"
59
60 void
dump_addrinfo(struct addrinfo * ai)61 dump_addrinfo(struct addrinfo *ai)
62 {
63 int i;
64
65 if (ai == NULL) {
66 printf("ai==NULL\n");
67 return;
68 }
69
70 for (i = 0; ai; i++, ai = ai->ai_next) {
71 printf("ai[%d]: af=%d, len=%d", i,
72 ai->ai_family, ai->ai_addrlen);
73 dump_sockaddr(ai->ai_addr);
74 if (ai->ai_canonname) {
75 printf("ai[%d]: cname=\"%s\"\n",
76 i, ai->ai_canonname);
77 }
78 }
79 }
80
81 void
dump_sockaddr(struct sockaddr * sa)82 dump_sockaddr(struct sockaddr *sa)
83 {
84 char paddrbuf[INET6_ADDRSTRLEN];
85 struct sockaddr_in *sin;
86 struct sockaddr_in6 *sin6;
87 int af = sa->sa_family;
88 const char *ip;
89
90 printf(" saf=%d,", af);
91 switch (af) {
92 case AF_NETBIOS: /* see nbns_rq.c */
93 case AF_INET:
94 sin = (void *)sa;
95 ip = inet_ntop(AF_INET, &sin->sin_addr,
96 paddrbuf, sizeof (paddrbuf));
97 break;
98 case AF_INET6:
99 sin6 = (void *)sa;
100 ip = inet_ntop(AF_INET6, &sin6->sin6_addr,
101 paddrbuf, sizeof (paddrbuf));
102 break;
103 default:
104 ip = "?";
105 break;
106 }
107 printf(" IP=%s\n", ip);
108 }
109
110
111 /*
112 * SMB client name resolution - normal, and/or NetBIOS.
113 * Returns an EAI_xxx error number like getaddrinfo(3)
114 */
115 int
smb_ctx_getaddr(struct smb_ctx * ctx)116 smb_ctx_getaddr(struct smb_ctx *ctx)
117 {
118 struct nb_ctx *nbc = ctx->ct_nb;
119 struct addrinfo hints, *res;
120 char *srvaddr_str;
121 int gaierr, gaierr2;
122
123 if (ctx->ct_fullserver == NULL || ctx->ct_fullserver[0] == '\0')
124 return (EAI_NONAME);
125
126 if (ctx->ct_addrinfo != NULL) {
127 freeaddrinfo(ctx->ct_addrinfo);
128 ctx->ct_addrinfo = NULL;
129 }
130
131 /*
132 * If the user specified an address, use it,
133 * and don't do NetBIOS lookup.
134 */
135 if (ctx->ct_srvaddr_s) {
136 srvaddr_str = ctx->ct_srvaddr_s;
137 nbc->nb_flags &= ~NBCF_NS_ENABLE;
138 } else
139 srvaddr_str = ctx->ct_fullserver;
140
141 /*
142 * Default the server name we'll use in the
143 * protocol (i.e. NTLM, tree connect).
144 */
145 strlcpy(ctx->ct_srvname, ctx->ct_fullserver,
146 sizeof (ctx->ct_srvname));
147
148 /*
149 * Try to lookup the host address using the
150 * normal name-to-IP address mechanisms.
151 * If that fails, we MAY try NetBIOS.
152 */
153 memset(&hints, 0, sizeof (hints));
154 hints.ai_flags = AI_CANONNAME;
155 hints.ai_family = PF_UNSPEC;
156 hints.ai_socktype = SOCK_STREAM;
157 gaierr = getaddrinfo(srvaddr_str, NULL, &hints, &res);
158 if (gaierr == 0) {
159 ctx->ct_addrinfo = res;
160 return (0);
161 }
162
163 /*
164 * If regular IP name lookup failed, try NetBIOS,
165 * but only if given a valid NetBIOS name and if
166 * NetBIOS name lookup is enabled.
167 */
168 if (nbc->nb_flags & NBCF_NS_ENABLE) {
169 gaierr2 = nbns_getaddrinfo(ctx->ct_fullserver, nbc, &res);
170 if (gaierr2 == 0) {
171 if (res->ai_canonname)
172 strlcpy(ctx->ct_srvname,
173 res->ai_canonname,
174 sizeof (ctx->ct_srvname));
175 ctx->ct_addrinfo = res;
176 return (0);
177 }
178 }
179
180 /*
181 * Return the original error from getaddrinfo
182 */
183 if (smb_verbose) {
184 smb_error(dgettext(TEXT_DOMAIN,
185 "getaddrinfo: %s: %s"), 0,
186 ctx->ct_fullserver,
187 gai_strerror(gaierr));
188 }
189 return (gaierr);
190 }
191