1 /*
2 * Copyright (C) 1996-2021 The Squid Software Foundation and contributors
3 *
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
7 */
8
9 /*
10 * RFC 1908: Coexistence between SNMPv1 and SNMPv2
11 */
12 /**********************************************************************
13 *
14 * Copyright 1997 by Carnegie Mellon University
15 *
16 * All Rights Reserved
17 *
18 * Permission to use, copy, modify, and distribute this software and its
19 * documentation for any purpose and without fee is hereby granted,
20 * provided that the above copyright notice appear in all copies and that
21 * both that copyright notice and this permission notice appear in
22 * supporting documentation, and that the name of CMU not be
23 * used in advertising or publicity pertaining to distribution of the
24 * software without specific, written prior permission.
25 *
26 * CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
27 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
28 * CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
29 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
30 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
31 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
32 * SOFTWARE.
33 *
34 * Author: Ryan Troll <ryan+@andrew.cmu.edu>
35 *
36 **********************************************************************/
37
38 #include "squid.h"
39
40 #if HAVE_UNISTD_H
41 #include <unistd.h>
42 #endif
43 #if HAVE_STDLIB_H
44 #include <stdlib.h>
45 #endif
46 #if HAVE_SYS_TYPES_H
47 #include <sys/types.h>
48 #endif
49 #if HAVE_CTYPE_H
50 #include <ctype.h>
51 #endif
52 #if HAVE_GNUMALLOC_H
53 #include <gnumalloc.h>
54 #elif HAVE_MALLOC_H
55 #include <malloc.h>
56 #endif
57 #if HAVE_MEMORY_H
58 #include <memory.h>
59 #endif
60 #if HAVE_STRING_H
61 #include <string.h>
62 #endif
63 #if HAVE_STRINGS_H
64 #include <strings.h>
65 #endif
66 #if HAVE_BSTRING_H
67 #include <bstring.h>
68 #endif
69 #if HAVE_SYS_SOCKET_H
70 #include <sys/socket.h>
71 #endif
72 #if HAVE_NETINET_IN_H
73 #include <netinet/in.h>
74 #endif
75 #if HAVE_ARPA_INET_H
76 #include <arpa/inet.h>
77 #endif
78 #if HAVE_SYS_TIME_H
79 #include <sys/time.h>
80 #endif
81 #if HAVE_NETDB_H
82 #include <netdb.h>
83 #endif
84
85 #include "asn1.h"
86 #include "snmp.h"
87 #include "snmp_api_error.h"
88 #include "snmp_error.h"
89 #include "snmp_pdu.h"
90 #include "snmp_vars.h"
91
92 #include "util.h"
93
94 /*
95 * RFC 1908: Coexistence between SNMPv1 and SNMPv2
96 *
97 * These convert:
98 *
99 * V1 PDUs from an ** AGENT ** to V2 PDUs for an ** MANAGER **
100 * V2 PDUs from an ** MANAGER ** to V1 PDUs for an ** AGENT **
101 *
102 * We will never convert V1 information from a manager into V2 PDUs. V1
103 * requests are always honored by V2 agents, and the responses will be
104 * valid V1 responses. (I think. XXXXX)
105 *
106 */
107 int
snmp_coexist_V2toV1(struct snmp_pdu * PDU)108 snmp_coexist_V2toV1(struct snmp_pdu *PDU)
109 {
110 /* Per 3.1.1:
111 */
112 switch (PDU->command) {
113
114 case SNMP_PDU_GET:
115 case SNMP_PDU_GETNEXT:
116 #if SNMP_PDU_SET
117 case SNMP_PDU_SET:
118 #endif
119 return (1);
120 break;
121
122 case SNMP_PDU_GETBULK:
123 PDU->non_repeaters = 0;
124 PDU->max_repetitions = 0;
125 PDU->command = SNMP_PDU_GETNEXT;
126 return (1);
127 break;
128
129 default:
130 snmplib_debug(2, "Unable to translate PDU %d to SNMPv1!\n", PDU->command);
131 snmp_set_api_error(SNMPERR_PDU_TRANSLATION);
132 return (0);
133 }
134 }
135
136