Annotation of src/external/mpl/dhcp/dist/server/salloc.c, Revision 1.1.1.1
1.1 christos 1: /* $NetBSD$ */
2:
3: /* salloc.c
4:
5: Memory allocation for the DHCP server... */
6:
7: /*
8: * Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC")
9: * Copyright (c) 1996-2003 by Internet Software Consortium
10: *
11: * This Source Code Form is subject to the terms of the Mozilla Public
12: * License, v. 2.0. If a copy of the MPL was not distributed with this
13: * file, You can obtain one at http://mozilla.org/MPL/2.0/.
14: *
15: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
16: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
17: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
18: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
21: * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22: *
23: * Internet Systems Consortium, Inc.
24: * 950 Charter Street
25: * Redwood City, CA 94063
26: * <info@isc.org>
27: * https://www.isc.org/
28: *
29: */
30:
31: #include <sys/cdefs.h>
32: __RCSID("$NetBSD$");
33:
34: #include "dhcpd.h"
35: #include <omapip/omapip_p.h>
36:
37: #if defined (COMPACT_LEASES)
38: struct lease *free_leases;
39:
40: #if defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
41: struct lease *lease_hunks;
42:
43: void relinquish_lease_hunks ()
44: {
45: struct lease *c, *n, **p;
46: int i;
47:
48: /* Account for all the leases on the free list. */
49: for (n = lease_hunks; n; n = n->next) {
50: for (i = 1; i < n->starts + 1; i++) {
51: p = &free_leases;
52: for (c = free_leases; c; c = c->next) {
53: if (c == &n[i]) {
54: *p = c->next;
55: n->ends++;
56: break;
57: }
58: p = &c->next;
59: }
60: if (!c) {
61: log_info("lease %s refcnt %d",
62: piaddr (n[i].ip_addr), n[i].refcnt);
63: #if defined (DEBUG_RC_HISTORY)
64: dump_rc_history(&n[i]);
65: #endif
66: }
67: }
68: }
69:
70: for (c = lease_hunks; c; c = n) {
71: n = c->next;
72: if (c->ends != c->starts) {
73: log_info("lease hunk %lx leases %ld free %ld",
74: (unsigned long)c, (unsigned long)(c->starts),
75: (unsigned long)(c->ends));
76: }
77: dfree(c, MDL);
78: }
79:
80: /* Free all the rogue leases. */
81: for (c = free_leases; c; c = n) {
82: n = c->next;
83: dfree(c, MDL);
84: }
85: }
86:
87: #endif
88:
89: struct lease *new_leases (n, file, line)
90: unsigned n;
91: const char *file;
92: int line;
93: {
94: struct lease *rval;
95: #if defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
96: rval = dmalloc ((n + 1) * sizeof (struct lease), file, line);
97: if (rval != NULL) {
98: memset (rval, 0, sizeof (struct lease));
99: rval -> starts = n;
100: rval -> next = lease_hunks;
101: lease_hunks = rval;
102: rval++;
103: }
104: #else
105: rval = dmalloc (n * sizeof (struct lease), file, line);
106: #endif
107: return rval;
108: }
109:
110: /* If we are allocating leases in aggregations, there's really no way
111: to free one, although perhaps we can maintain a free list. */
112:
113: isc_result_t dhcp_lease_free (omapi_object_t *lo,
114: const char *file, int line)
115: {
116: struct lease *lease;
117: if (lo -> type != dhcp_type_lease)
118: return DHCP_R_INVALIDARG;
119: lease = (struct lease *)lo;
120: memset (lease, 0, sizeof (struct lease));
121: lease -> next = free_leases;
122: free_leases = lease;
123: return ISC_R_SUCCESS;
124: }
125:
126: isc_result_t dhcp_lease_get (omapi_object_t **lp,
127: const char *file, int line)
128: {
129: struct lease **lease = (struct lease **)lp;
130: struct lease *lt;
131:
132: if (free_leases) {
133: lt = free_leases;
134: free_leases = lt -> next;
135: *lease = lt;
136: return ISC_R_SUCCESS;
137: }
138: return ISC_R_NOMEMORY;
139: }
140: #endif /* COMPACT_LEASES */
141:
142: OMAPI_OBJECT_ALLOC (lease, struct lease, dhcp_type_lease)
143: OMAPI_OBJECT_ALLOC (class, struct class, dhcp_type_class)
144: OMAPI_OBJECT_ALLOC (subclass, struct class, dhcp_type_subclass)
145: OMAPI_OBJECT_ALLOC (pool, struct pool, dhcp_type_pool)
146:
147: #if !defined (NO_HOST_FREES) /* Scary debugging mode - don't enable! */
148: OMAPI_OBJECT_ALLOC (host, struct host_decl, dhcp_type_host)
149: #else
150: isc_result_t host_allocate (struct host_decl **p, const char *file, int line)
151: {
152: return omapi_object_allocate ((omapi_object_t **)p,
153: dhcp_type_host, 0, file, line);
154: }
155:
156: isc_result_t host_reference (struct host_decl **pptr, struct host_decl *ptr,
157: const char *file, int line)
158: {
159: return omapi_object_reference ((omapi_object_t **)pptr,
160: (omapi_object_t *)ptr, file, line);
161: }
162:
163: isc_result_t host_dereference (struct host_decl **ptr,
164: const char *file, int line)
165: {
166: if ((*ptr) -> refcnt == 1) {
167: log_error ("host dereferenced with refcnt == 1.");
168: #if defined (DEBUG_RC_HISTORY)
169: dump_rc_history ();
170: #endif
171: abort ();
172: }
173: return omapi_object_dereference ((omapi_object_t **)ptr, file, line);
174: }
175: #endif
176:
177: struct lease_state *free_lease_states;
178:
179: struct lease_state *new_lease_state (file, line)
180: const char *file;
181: int line;
182: {
183: struct lease_state *rval;
184:
185: if (free_lease_states) {
186: rval = free_lease_states;
187: free_lease_states =
188: (struct lease_state *)(free_lease_states -> next);
189: dmalloc_reuse (rval, file, line, 0);
190: } else {
191: rval = dmalloc (sizeof (struct lease_state), file, line);
192: if (!rval)
193: return rval;
194: }
195: memset (rval, 0, sizeof *rval);
196: if (!option_state_allocate (&rval -> options, file, line)) {
197: free_lease_state (rval, file, line);
198: return (struct lease_state *)0;
199: }
200: return rval;
201: }
202:
203: void free_lease_state (ptr, file, line)
204: struct lease_state *ptr;
205: const char *file;
206: int line;
207: {
208: if (ptr -> options)
209: option_state_dereference (&ptr -> options, file, line);
210: if (ptr -> packet)
211: packet_dereference (&ptr -> packet, file, line);
212: if (ptr -> shared_network)
213: shared_network_dereference (&ptr -> shared_network,
214: file, line);
215:
216: data_string_forget (&ptr -> parameter_request_list, file, line);
217: data_string_forget (&ptr -> filename, file, line);
218: data_string_forget (&ptr -> server_name, file, line);
219: ptr -> next = free_lease_states;
220: free_lease_states = ptr;
221: dmalloc_reuse (free_lease_states, (char *)0, 0, 0);
222: }
223:
224: #if defined (DEBUG_MEMORY_LEAKAGE) || \
225: defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
226: void relinquish_free_lease_states ()
227: {
228: struct lease_state *cs, *ns;
229:
230: for (cs = free_lease_states; cs; cs = ns) {
231: ns = cs -> next;
232: dfree (cs, MDL);
233: }
234: free_lease_states = (struct lease_state *)0;
235: }
236: #endif
237:
238: struct permit *new_permit (file, line)
239: const char *file;
240: int line;
241: {
242: struct permit *permit = ((struct permit *)
243: dmalloc (sizeof (struct permit), file, line));
244: if (!permit)
245: return permit;
246: memset (permit, 0, sizeof *permit);
247: return permit;
248: }
249:
250: void free_permit (permit, file, line)
251: struct permit *permit;
252: const char *file;
253: int line;
254: {
255: if (permit -> type == permit_class)
256: class_dereference (&permit -> class, MDL);
257: dfree (permit, file, line);
258: }
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