lib/init.c

   1 /*
   2    Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
   3
   4
   5
   6    This program is distributed in the hope that it will be useful,
   7    but WITHOUT ANY WARRANTY; without even the implied warranty of
   8    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9    GNU Lesser General Public License for more details.
  10
  11    You should have received a copy of the GNU Lesser General Public License
  12    along with this program; if not, see <http://www.gnu.org/licenses/>.
  13 */
  14 #ifdef HAVE_CONFIG_H
  15 #include "config.h"
  16 #endif
  17
  18 #ifdef AROS
  19 #include "aros_compat.h"
  20 #endif
  21
  22 #ifdef WIN32
  23 #include "win32_compat.h"
  24 #endif
  25
  26 #define _GNU_SOURCE
  27
  28 #ifdef HAVE_UNISTD_H
  29 #include <unistd.h>
  30 #endif
  31
  32 #ifdef HAVE_STRINGS_H
  33 #include <strings.h>
  34 #endif
  35
  36 #include <stdio.h>
  37 #include <stdarg.h>
  38 #include <string.h>
  39 #include <stdlib.h>
  40 #include <assert.h>
  41 #include <time.h>
  42 #include "slist.h"
  43 #include "libnfs-zdr.h"
  44 #include "libnfs.h"
  45 #include "libnfs-raw.h"
  46 #include "libnfs-private.h"
  47
  48 struct rpc_context *rpc_init_context(void)
  49 {
  50         struct rpc_context *rpc;
  51         static uint32_t salt = 0;
  52
  53         rpc = malloc(sizeof(struct rpc_context));
  54         if (rpc == NULL) {
  55                 return NULL;
  56         }
  57         memset(rpc, 0, sizeof(struct rpc_context));
  58
  59         rpc->magic = RPC_CONTEXT_MAGIC;
  60
  61         /* Allow 1M of data (for writes) and some */
  62         rpc->encodebuflen = 1024 * 1024 + 4096;
  63         rpc->encodebuf = malloc(rpc->encodebuflen);
  64         if (rpc->encodebuf == NULL) {
  65                 free(rpc);
  66                 return NULL;
  67         }
  68
  69         rpc->auth = authunix_create_default();
  70         if (rpc->auth == NULL) {
  71                 free(rpc->encodebuf);
  72                 free(rpc);
  73                 return NULL;
  74         }
  75         rpc->xid = salt + time(NULL) + getpid() << 16;
  76         salt += 0x01000000;
  77         rpc->fd = -1;
  78         rpc->tcp_syncnt = RPC_PARAM_UNDEFINED;
  79 #if defined(WIN32) || defined(ANDROID)
  80         rpc->uid = 65534;
  81         rpc->gid = 65534;
  82 #else
  83         rpc->uid = getuid();
  84         rpc->gid = getgid();
  85 #endif
  86
  87         return rpc;
  88 }
  89
  90
  91 struct rpc_context *rpc_init_udp_context(void)
  92 {
  93         struct rpc_context *rpc;
  94
  95         rpc = rpc_init_context();
  96         if (rpc != NULL) {
  97                 rpc->is_udp = 1;
  98         }
  99
 100         return rpc;
 101 }
 102
 103 void rpc_set_auth(struct rpc_context *rpc, struct AUTH *auth)
 104 {
 105         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 106
 107         if (rpc->auth != NULL) {
 108                 auth_destroy(rpc->auth);
 109         }
 110         rpc->auth = auth;
 111 }
 112
 113 static void rpc_set_uid_gid(struct rpc_context *rpc, int uid, int gid) {
 114         if (uid != rpc->uid || gid != rpc->gid) {
 115                 struct AUTH *auth = libnfs_authunix_create("libnfs", uid, gid, 0, NULL);
 116                 if (auth != NULL) {
 117                         rpc_set_auth(rpc, auth);
 118                         rpc->uid = uid;
 119                         rpc->gid = gid;
 120                 }
 121         }
 122 }
 123
 124 void rpc_set_uid(struct rpc_context *rpc, int uid) {
 125         rpc_set_uid_gid(rpc, uid, rpc->gid);
 126 }
 127
 128 void rpc_set_gid(struct rpc_context *rpc, int gid) {
 129         rpc_set_uid_gid(rpc, rpc->uid, gid);
 130 }
 131
 132 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...)
 133 {
 134         va_list ap;
 135         char *old_error_string = rpc->error_string;
 136
 137         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 138
 139         va_start(ap, error_string);
 140         rpc->error_string = malloc(1024);
 141         vsnprintf(rpc->error_string, 1024, error_string, ap);
 142         va_end(ap);
 143
 144         if (old_error_string != NULL) {
 145                 free(old_error_string);
 146         }
 147 }
 148
 149 char *rpc_get_error(struct rpc_context *rpc)
 150 {
 151         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 152
 153         return rpc->error_string;
 154 }
 155
 156 void rpc_error_all_pdus(struct rpc_context *rpc, char *error)
 157 {
 158         struct rpc_pdu *pdu;
 159
 160         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 161
 162         while((pdu = rpc->outqueue) != NULL) {
 163                 pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 164                 SLIST_REMOVE(&rpc->outqueue, pdu);
 165                 rpc_free_pdu(rpc, pdu);
 166         }
 167         while((pdu = rpc->waitpdu) != NULL) {
 168                 pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 169                 SLIST_REMOVE(&rpc->waitpdu, pdu);
 170                 rpc_free_pdu(rpc, pdu);
 171         }
 172 }
 173
 174 static void rpc_free_fragment(struct rpc_fragment *fragment)
 175 {
 176         if (fragment->data != NULL) {
 177                 free(fragment->data);
 178         }
 179         free(fragment);
 180 }
 181
 182 void rpc_free_all_fragments(struct rpc_context *rpc)
 183 {
 184         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 185
 186         while (rpc->fragments != NULL) {
 187               struct rpc_fragment *fragment = rpc->fragments;
 188
 189               SLIST_REMOVE(&rpc->fragments, fragment);
 190               rpc_free_fragment(fragment);
 191         }
 192 }
 193
 194 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size)
 195 {
 196         struct rpc_fragment *fragment;
 197
 198         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 199
 200         fragment = malloc(sizeof(struct rpc_fragment));
 201         if (fragment == NULL) {
 202                 return -1;
 203         }
 204
 205         fragment->size = size;
 206         fragment->data = malloc(fragment->size);
 207         if(fragment->data == NULL) {
 208                 free(fragment);
 209                 return -1;
 210         }
 211
 212         memcpy(fragment->data, data, fragment->size);
 213         SLIST_ADD_END(&rpc->fragments, fragment);
 214         return 0;
 215 }
 216
 217 void rpc_destroy_context(struct rpc_context *rpc)
 218 {
 219         struct rpc_pdu *pdu;
 220
 221         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 222
 223         while((pdu = rpc->outqueue) != NULL) {
 224                 pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 225                 SLIST_REMOVE(&rpc->outqueue, pdu);
 226                 rpc_free_pdu(rpc, pdu);
 227         }
 228         while((pdu = rpc->waitpdu) != NULL) {
 229                 pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 230                 SLIST_REMOVE(&rpc->waitpdu, pdu);
 231                 rpc_free_pdu(rpc, pdu);
 232         }
 233
 234         rpc_free_all_fragments(rpc);
 235
 236         auth_destroy(rpc->auth);
 237         rpc->auth =NULL;
 238
 239         if (rpc->fd != -1) {
 240                 close(rpc->fd);
 241         }
 242
 243         if (rpc->encodebuf != NULL) {
 244                 free(rpc->encodebuf);
 245                 rpc->encodebuf = NULL;
 246         }
 247
 248         if (rpc->error_string != NULL) {
 249                 free(rpc->error_string);
 250                 rpc->error_string = NULL;
 251         }
 252
 253         if (rpc->udp_dest != NULL) {
 254                 free(rpc->udp_dest);
 255                 rpc->udp_dest = NULL;
 256         }
 257
 258         rpc->magic = 0;
 259         free(rpc);
 260 }
 261
 262