xref: /titanic_41/usr/src/uts/common/fs/smbclnt/netsmb/smb_tran.c (revision 02d09e03eb27f3a2dc299de704e45dae5173f43f)
1 /*
2  * Copyright (c) 2000-2001 Boris Popov
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *    This product includes software developed by Boris Popov.
16  * 4. Neither the name of the author nor the names of any co-contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  * Selected code from smb_conn.c
33  */
34 
35 /*
36  * Helper functions for smb_trantcp.c
37  * (and maybe future transports)
38  */
39 
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kmem.h>
43 #include <sys/cmn_err.h>
44 
45 #include <netinet/in.h>
46 #include <netinet/tcp.h>
47 
48 #include <netsmb/smb_osdep.h>
49 #include <netsmb/netbios.h>
50 
51 #include <netsmb/smb.h>
52 #include <netsmb/smb_conn.h>
53 #include <netsmb/smb_subr.h>
54 #include <netsmb/smb_tran.h>
55 
56 /*
57  * Return the length of a sockaddr structure.
58  * Only needs to handle the address formats
59  * used by smb_dup_sockaddr.
60  */
61 static size_t
SA_LEN(struct sockaddr * sa)62 SA_LEN(struct sockaddr *sa)
63 {
64 	size_t len;
65 
66 	switch (sa->sa_family) {
67 	case AF_INET:
68 		len = sizeof (struct sockaddr_in);
69 		break;
70 	case AF_INET6:
71 		len = sizeof (struct sockaddr_in6);
72 		break;
73 	case AF_NETBIOS:
74 		len = sizeof (struct sockaddr_nb);
75 		break;
76 	default:
77 		SMBSDEBUG("invalid address family %d\n", sa->sa_family);
78 		len = sizeof (struct sockaddr);
79 		break;
80 	}
81 
82 	return (len);
83 }
84 
85 /*
86  * Compare two sockaddr contents
87  * Return zero if identical.
88  */
89 int
smb_cmp_sockaddr(struct sockaddr * a1,struct sockaddr * a2)90 smb_cmp_sockaddr(struct sockaddr *a1, struct sockaddr *a2)
91 {
92 	size_t l1, l2;
93 
94 	l1 = SA_LEN(a1);
95 	l2 = SA_LEN(a2);
96 
97 	if (l1 != l2)
98 		return (-1);
99 
100 	return (bcmp(a1, a2, l1));
101 }
102 
103 /*
104  * Copy a socket address of varying size.
105  */
106 struct sockaddr *
smb_dup_sockaddr(struct sockaddr * sa)107 smb_dup_sockaddr(struct sockaddr *sa)
108 {
109 	struct sockaddr *sa2;
110 	size_t len;
111 
112 	/* Get the length (varies per family) */
113 	len = SA_LEN(sa);
114 
115 	sa2 = kmem_alloc(len, KM_SLEEP);
116 	if (sa2)
117 		bcopy(sa, sa2, len);
118 
119 	return (sa2);
120 }
121 
122 void
smb_free_sockaddr(struct sockaddr * sa)123 smb_free_sockaddr(struct sockaddr *sa)
124 {
125 	size_t len;
126 
127 	/* Get the length (varies per family) */
128 	len = SA_LEN(sa);
129 
130 	kmem_free(sa, len);
131 }
132