1/* 2 Unix SMB/CIFS implementation. 3 4 NTPTR base code 5 6 Copyright (C) Stefan (metze) Metzmacher 2005 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. 20*/ 21/* 22 this implements the core code for all NTPTR modules. Backends register themselves here. 23*/ 24 25#include "includes.h" 26#include "ntptr/ntptr.h" 27#include "param/param.h" 28 29/* the list of currently registered NTPTR backends */ 30static struct ntptr_backend { 31 const struct ntptr_ops *ops; 32} *backends = NULL; 33static int num_backends; 34 35/* 36 register a NTPTR backend. 37 38 The 'name' can be later used by other backends to find the operations 39 structure for this backend. 40*/ 41NTSTATUS ntptr_register(const void *_ops) 42{ 43 const struct ntptr_ops *ops = _ops; 44 struct ntptr_ops *new_ops; 45 46 if (ntptr_backend_byname(ops->name) != NULL) { 47 /* its already registered! */ 48 DEBUG(0,("NTPTR backend '%s' already registered\n", 49 ops->name)); 50 return NT_STATUS_OBJECT_NAME_COLLISION; 51 } 52 53 backends = realloc_p(backends, struct ntptr_backend, num_backends+1); 54 if (!backends) { 55 smb_panic("out of memory in ntptr_register"); 56 } 57 58 new_ops = smb_xmemdup(ops, sizeof(*ops)); 59 new_ops->name = smb_xstrdup(ops->name); 60 61 backends[num_backends].ops = new_ops; 62 63 num_backends++; 64 65 DEBUG(3,("NTPTR backend '%s'\n", 66 ops->name)); 67 68 return NT_STATUS_OK; 69} 70 71NTSTATUS ntptr_init(struct loadparm_context *lp_ctx) 72{ 73 extern NTSTATUS ntptr_simple_ldb_init(void); 74 init_module_fn static_init[] = { STATIC_ntptr_MODULES }; 75 init_module_fn *shared_init = load_samba_modules(NULL, lp_ctx, "ntptr"); 76 77 run_init_functions(static_init); 78 run_init_functions(shared_init); 79 80 talloc_free(shared_init); 81 82 return NT_STATUS_OK; 83} 84 85 86/* 87 return the operations structure for a named backend 88*/ 89const struct ntptr_ops *ntptr_backend_byname(const char *name) 90{ 91 int i; 92 93 for (i=0;i<num_backends;i++) { 94 if (strcmp(backends[i].ops->name, name) == 0) { 95 return backends[i].ops; 96 } 97 } 98 99 return NULL; 100} 101 102 103/* 104 return the NTPTR interface version, and the size of some critical types 105 This can be used by backends to either detect compilation errors, or provide 106 multiple implementations for different smbd compilation options in one module 107*/ 108static const struct ntptr_critical_sizes critical_sizes = { 109 .interface_version = NTPTR_INTERFACE_VERSION, 110 .sizeof_ntptr_critical_sizes = sizeof(struct ntptr_critical_sizes), 111 .sizeof_ntptr_context = sizeof(struct ntptr_context), 112 .sizeof_ntptr_ops = sizeof(struct ntptr_ops), 113}; 114const struct ntptr_critical_sizes *ntptr_interface_version(void) 115{ 116 return &critical_sizes; 117} 118 119/* 120 create a ntptr_context with a specified NTPTR backend 121*/ 122NTSTATUS ntptr_init_context(TALLOC_CTX *mem_ctx, struct tevent_context *ev_ctx, 123 struct loadparm_context *lp_ctx, 124 const char *providor, struct ntptr_context **_ntptr) 125{ 126 NTSTATUS status; 127 struct ntptr_context *ntptr; 128 129 if (!providor) { 130 return NT_STATUS_INTERNAL_ERROR; 131 } 132 133 ntptr = talloc(mem_ctx, struct ntptr_context); 134 NT_STATUS_HAVE_NO_MEMORY(ntptr); 135 ntptr->private_data = NULL; 136 ntptr->ops = ntptr_backend_byname(providor); 137 ntptr->ev_ctx = ev_ctx; 138 ntptr->lp_ctx = lp_ctx; 139 140 if (!ntptr->ops) { 141 DEBUG(1,("ntptr_init_context: failed to find NTPTR providor='%s'\n", 142 providor)); 143 return NT_STATUS_INTERNAL_ERROR; 144 } 145 146 status = ntptr->ops->init_context(ntptr); 147 NT_STATUS_NOT_OK_RETURN(status); 148 149 *_ntptr = ntptr; 150 return NT_STATUS_OK; 151} 152