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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
3a4c9688 VB |
2 | /* SNMP support |
3 | * Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org> | |
3a4c9688 VB |
4 | */ |
5 | ||
6 | #include <zebra.h> | |
7 | ||
3a4c9688 VB |
8 | #include <net-snmp/net-snmp-config.h> |
9 | #include <net-snmp/net-snmp-includes.h> | |
10 | ||
11 | #include "smux.h" | |
12 | ||
d62a17ae | 13 | int oid_compare(const oid *o1, int o1_len, const oid *o2, int o2_len) |
3a4c9688 | 14 | { |
d62a17ae | 15 | int i; |
16 | ||
7a8ce9d5 | 17 | for (i = 0; i < MIN(o1_len, o2_len); i++) { |
d62a17ae | 18 | if (o1[i] < o2[i]) |
19 | return -1; | |
20 | else if (o1[i] > o2[i]) | |
21 | return 1; | |
22 | } | |
23 | if (o1_len < o2_len) | |
24 | return -1; | |
25 | if (o1_len > o2_len) | |
26 | return 1; | |
27 | ||
28 | return 0; | |
3a4c9688 VB |
29 | } |
30 | ||
d62a17ae | 31 | void *oid_copy(void *dest, const void *src, size_t size) |
3a4c9688 | 32 | { |
d62a17ae | 33 | return memcpy(dest, src, size * sizeof(oid)); |
3a4c9688 VB |
34 | } |
35 | ||
d62a17ae | 36 | void oid2in_addr(oid oid[], int len, struct in_addr *addr) |
3a4c9688 | 37 | { |
d62a17ae | 38 | int i; |
d7c0a89a | 39 | uint8_t *pnt; |
3a4c9688 | 40 | |
d62a17ae | 41 | if (len == 0) |
42 | return; | |
3a4c9688 | 43 | |
d7c0a89a | 44 | pnt = (uint8_t *)addr; |
d62a17ae | 45 | |
46 | for (i = 0; i < len; i++) | |
47 | *pnt++ = oid[i]; | |
3a4c9688 VB |
48 | } |
49 | ||
5a224c19 PR |
50 | void oid2in6_addr(oid oid[], struct in6_addr *addr) |
51 | { | |
52 | unsigned int i; | |
53 | uint8_t *pnt; | |
54 | ||
55 | pnt = (uint8_t *)addr; | |
56 | ||
57 | for (i = 0; i < sizeof(struct in6_addr); i++) | |
58 | *pnt++ = oid[i]; | |
59 | } | |
60 | ||
4f13e83d PR |
61 | void oid2int(oid oid[], int *dest) |
62 | { | |
63 | uint8_t i; | |
64 | uint8_t *pnt; | |
65 | int network_dest; | |
66 | ||
67 | pnt = (uint8_t *)&network_dest; | |
68 | ||
69 | for (i = 0; i < sizeof(int); i++) | |
70 | *pnt++ = oid[i]; | |
71 | *dest = ntohl(network_dest); | |
72 | } | |
73 | ||
9e263221 | 74 | void oid_copy_in_addr(oid oid[], const struct in_addr *addr) |
3a4c9688 | 75 | { |
d62a17ae | 76 | int i; |
4ce217af | 77 | const uint8_t *pnt; |
9e263221 | 78 | int len = sizeof(struct in_addr); |
d62a17ae | 79 | |
9e263221 PR |
80 | pnt = (uint8_t *)addr; |
81 | ||
82 | for (i = 0; i < len; i++) | |
83 | oid[i] = *pnt++; | |
84 | } | |
85 | ||
86 | ||
87 | void oid_copy_in6_addr(oid oid[], const struct in6_addr *addr) | |
88 | { | |
89 | int i; | |
90 | const uint8_t *pnt; | |
91 | int len = sizeof(struct in6_addr); | |
3a4c9688 | 92 | |
d7c0a89a | 93 | pnt = (uint8_t *)addr; |
3a4c9688 | 94 | |
d62a17ae | 95 | for (i = 0; i < len; i++) |
96 | oid[i] = *pnt++; | |
3a4c9688 VB |
97 | } |
98 | ||
4f13e83d PR |
99 | void oid_copy_int(oid oid[], int *val) |
100 | { | |
101 | uint8_t i; | |
102 | const uint8_t *pnt; | |
103 | int network_val; | |
104 | ||
105 | network_val = htonl(*val); | |
106 | pnt = (uint8_t *)&network_val; | |
107 | ||
108 | for (i = 0; i < sizeof(int); i++) | |
109 | oid[i] = *pnt++; | |
110 | } | |
111 | ||
0d020cd6 PR |
112 | void oid2string(oid oid[], int len, char *string) |
113 | { | |
114 | int i; | |
115 | uint8_t *pnt; | |
116 | ||
117 | if (len == 0) | |
118 | return; | |
119 | ||
120 | pnt = (uint8_t *)string; | |
121 | ||
122 | for (i = 0; i < len; i++) | |
4f13e83d | 123 | *pnt++ = (uint8_t)oid[i]; |
0d020cd6 PR |
124 | } |
125 | ||
126 | void oid_copy_str(oid oid[], const char *string, int len) | |
127 | { | |
128 | int i; | |
129 | const uint8_t *pnt; | |
130 | ||
131 | if (len == 0) | |
132 | return; | |
133 | ||
134 | pnt = (uint8_t *)string; | |
135 | ||
136 | for (i = 0; i < len; i++) | |
137 | oid[i] = *pnt++; | |
138 | } | |
139 | ||
d62a17ae | 140 | int smux_header_generic(struct variable *v, oid *name, size_t *length, |
141 | int exact, size_t *var_len, WriteMethod **write_method) | |
3a4c9688 | 142 | { |
d62a17ae | 143 | oid fulloid[MAX_OID_LEN]; |
144 | int ret; | |
3a4c9688 | 145 | |
d62a17ae | 146 | oid_copy(fulloid, v->name, v->namelen); |
147 | fulloid[v->namelen] = 0; | |
148 | /* Check against full instance. */ | |
149 | ret = oid_compare(name, *length, fulloid, v->namelen + 1); | |
3a4c9688 | 150 | |
d62a17ae | 151 | /* Check single instance. */ |
152 | if ((exact && (ret != 0)) || (!exact && (ret >= 0))) | |
153 | return MATCH_FAILED; | |
3a4c9688 | 154 | |
d62a17ae | 155 | /* In case of getnext, fill in full instance. */ |
156 | memcpy(name, fulloid, (v->namelen + 1) * sizeof(oid)); | |
157 | *length = v->namelen + 1; | |
3a4c9688 | 158 | |
d62a17ae | 159 | *write_method = 0; |
160 | *var_len = sizeof(long); /* default to 'long' results */ | |
3a4c9688 | 161 | |
d62a17ae | 162 | return MATCH_SUCCEEDED; |
3a4c9688 | 163 | } |
8046ba6e | 164 | |
d62a17ae | 165 | int smux_header_table(struct variable *v, oid *name, size_t *length, int exact, |
166 | size_t *var_len, WriteMethod **write_method) | |
8046ba6e | 167 | { |
d62a17ae | 168 | /* If the requested OID name is less than OID prefix we |
169 | handle, adjust it to our prefix. */ | |
170 | if ((oid_compare(name, *length, v->name, v->namelen)) < 0) { | |
171 | if (exact) | |
172 | return MATCH_FAILED; | |
173 | oid_copy(name, v->name, v->namelen); | |
174 | *length = v->namelen; | |
175 | } | |
176 | ||
177 | *write_method = 0; | |
178 | *var_len = sizeof(long); | |
179 | ||
180 | return MATCH_SUCCEEDED; | |
8046ba6e | 181 | } |