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Commit | Line | Data |
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c790b906 TL |
1 | /* listener.c |
2 | ||
3 | Subroutines that support the omapi extensible array type. */ | |
4 | ||
5 | /* | |
7512d88b | 6 | * Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC") |
98311e4b | 7 | * Copyright (c) 2001-2003 by Internet Software Consortium |
c790b906 | 8 | * |
7512d88b TM |
9 | * This Source Code Form is subject to the terms of the Mozilla Public |
10 | * License, v. 2.0. If a copy of the MPL was not distributed with this | |
11 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
c790b906 | 12 | * |
98311e4b DH |
13 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
14 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
15 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR | |
16 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
17 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
18 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
19 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
c790b906 | 20 | * |
98311e4b DH |
21 | * Internet Systems Consortium, Inc. |
22 | * 950 Charter Street | |
23 | * Redwood City, CA 94063 | |
24 | * <info@isc.org> | |
2c85ac9b | 25 | * https://www.isc.org/ |
c790b906 | 26 | * |
c790b906 TL |
27 | */ |
28 | ||
fe5b0fdd DH |
29 | #include "dhcpd.h" |
30 | ||
c790b906 TL |
31 | #include <omapip/omapip_p.h> |
32 | ||
33 | /* Allocate a new extensible array. */ | |
34 | ||
35 | isc_result_t omapi_array_allocate (omapi_array_t **array, | |
36 | omapi_array_ref_t ref, | |
37 | omapi_array_deref_t deref, | |
38 | const char *file, int line) | |
39 | { | |
c790b906 TL |
40 | omapi_array_t *aptr; |
41 | ||
42 | if (!array || *array) | |
98bf1607 | 43 | return DHCP_R_INVALIDARG; |
c790b906 TL |
44 | aptr = dmalloc (sizeof (omapi_array_t),file, line); |
45 | if (!aptr) | |
46 | return ISC_R_NOMEMORY; | |
47 | *array = aptr; | |
48 | aptr -> ref = ref; | |
49 | aptr -> deref = deref; | |
50 | return ISC_R_SUCCESS; | |
51 | } | |
52 | ||
d758ad8c TL |
53 | isc_result_t omapi_array_free (omapi_array_t **array, |
54 | const char *file, int line) | |
55 | { | |
d758ad8c TL |
56 | omapi_array_t *aptr; |
57 | int i; | |
58 | ||
59 | if (!array || !*array) | |
98bf1607 | 60 | return DHCP_R_INVALIDARG; |
d758ad8c TL |
61 | aptr = *array; |
62 | for (i = 0; i < aptr -> count; i++) | |
63 | if (aptr -> data [i] && aptr -> deref) | |
64 | (*aptr -> deref) (&aptr -> data [i], file, line); | |
65 | dfree (aptr -> data, MDL); | |
66 | dfree (aptr, MDL); | |
67 | *array = (omapi_array_t *)0; | |
68 | return ISC_R_SUCCESS; | |
69 | } | |
70 | ||
c790b906 TL |
71 | /* Extend the size of the array by one entry (we may allocate more than that) |
72 | and store the specified value in the new array element. */ | |
73 | ||
74 | isc_result_t omapi_array_extend (omapi_array_t *array, char *ptr, | |
75 | int *index, const char *file, int line) | |
76 | { | |
77 | isc_result_t status; | |
78 | int new = array -> count; | |
79 | status = omapi_array_set (array, ptr, new, file, line); | |
80 | if (index && status == ISC_R_SUCCESS) | |
81 | *index = new; | |
82 | return status; | |
83 | } | |
84 | ||
85 | /* Set a value in the specified array, extending it if necessary. */ | |
86 | ||
87 | isc_result_t omapi_array_set (omapi_array_t *array, void *ptr, int index, | |
88 | const char *file, int line) | |
89 | { | |
90 | char **newbuf; | |
91 | int delta; | |
92 | isc_result_t status; | |
93 | ||
94 | if (!array) | |
98bf1607 | 95 | return DHCP_R_INVALIDARG; |
c790b906 | 96 | if (!ptr) |
98bf1607 | 97 | return DHCP_R_INVALIDARG; |
c790b906 | 98 | if (index < 0) |
98bf1607 | 99 | return DHCP_R_INVALIDARG; |
c790b906 TL |
100 | |
101 | /* If the proposed index is larger than the current available | |
102 | space in the array, make more space in the array. */ | |
103 | if (array -> max <= index) { | |
104 | delta = index - array -> max + 10; | |
105 | newbuf = dmalloc ((array -> max + delta) * sizeof (char *), | |
106 | file, line); | |
107 | if (!newbuf) | |
108 | return ISC_R_NOMEMORY; | |
109 | /* Zero the new elements. */ | |
110 | memset (&newbuf [array -> max], 0, (sizeof (char *)) * delta); | |
111 | array -> max += delta; | |
112 | /* Copy the old array data into the new buffer. */ | |
113 | if (array -> data) { | |
114 | memcpy (newbuf, | |
115 | array -> data, array -> count * sizeof (char *)); | |
116 | dfree (array -> data, file, line); | |
117 | } | |
118 | array -> data = newbuf; | |
119 | } else { | |
120 | /* If there's already data there, and this is an array | |
121 | of references, dereference what's there. */ | |
122 | if (array -> data [index]) { | |
123 | status = ((*array -> deref) (&array -> data [index], | |
124 | file, line)); | |
125 | ||
126 | if (status != ISC_R_SUCCESS) | |
127 | return status; | |
128 | } | |
129 | } | |
130 | ||
131 | /* Store the pointer using the referencer function. We have | |
132 | either just memset this to zero or dereferenced what was | |
133 | there previously, so there is no need to do anything if the | |
134 | pointer we have been asked to store is null. */ | |
135 | if (ptr) { | |
136 | status = (*array -> ref) (&array -> data [index], ptr, | |
137 | file, line); | |
138 | if (status != ISC_R_SUCCESS) | |
139 | return status; | |
140 | } | |
141 | if (index >= array -> count) | |
142 | array -> count = index + 1; | |
143 | return ISC_R_SUCCESS; | |
144 | } | |
145 | ||
146 | isc_result_t omapi_array_lookup (char **ptr, omapi_array_t *array, int index, | |
147 | const char *file, int line) | |
148 | { | |
149 | if (!array || !ptr || *ptr || index < 0 || index >= array -> count) | |
98bf1607 | 150 | return DHCP_R_INVALIDARG; |
c790b906 TL |
151 | if (array -> data [index]) |
152 | return (*array -> ref) (ptr, | |
153 | array -> data [index], file, line); | |
154 | return ISC_R_NOTFOUND; | |
155 | } | |
156 |