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         unsigned int i;
  53
  54         rpc = malloc(sizeof(struct rpc_context));
  55         if (rpc == NULL) {
  56                 return NULL;
  57         }
  58         memset(rpc, 0, sizeof(struct rpc_context));
  59
  60         rpc->magic = RPC_CONTEXT_MAGIC;
  61
  62         /* Allow 1M of data (for writes) and some */
  63         rpc->encodebuflen = 1024 * 1024 + 4096;
  64         rpc->encodebuf = malloc(rpc->encodebuflen);
  65         if (rpc->encodebuf == NULL) {
  66                 free(rpc);
  67                 return NULL;
  68         }
  69
  70         rpc->auth = authunix_create_default();
  71         if (rpc->auth == NULL) {
  72                 free(rpc->encodebuf);
  73                 free(rpc);
  74                 return NULL;
  75         }
  76         rpc->xid = salt + time(NULL) + getpid() << 16;
  77         salt += 0x01000000;
  78         rpc->fd = -1;
  79         rpc->tcp_syncnt = RPC_PARAM_UNDEFINED;
  80 #if defined(WIN32) || defined(ANDROID)
  81         rpc->uid = 65534;
  82         rpc->gid = 65534;
  83 #else
  84         rpc->uid = getuid();
  85         rpc->gid = getgid();
  86 #endif
  87         rpc_reset_queue(&rpc->outqueue);
  88         for (i = 0; i < HASHES; i++)
  89                 rpc_reset_queue(&rpc->waitpdu[i]);
  90
  91         return rpc;
  92 }
  93
  94
  95 struct rpc_context *rpc_init_udp_context(void)
  96 {
  97         struct rpc_context *rpc;
  98
  99         rpc = rpc_init_context();
 100         if (rpc != NULL) {
 101                 rpc->is_udp = 1;
 102         }
 103
 104         return rpc;
 105 }
 106
 107 void rpc_set_auth(struct rpc_context *rpc, struct AUTH *auth)
 108 {
 109         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 110
 111         if (rpc->auth != NULL) {
 112                 auth_destroy(rpc->auth);
 113         }
 114         rpc->auth = auth;
 115 }
 116
 117 static void rpc_set_uid_gid(struct rpc_context *rpc, int uid, int gid) {
 118         if (uid != rpc->uid || gid != rpc->gid) {
 119                 struct AUTH *auth = libnfs_authunix_create("libnfs", uid, gid, 0, NULL);
 120                 if (auth != NULL) {
 121                         rpc_set_auth(rpc, auth);
 122                         rpc->uid = uid;
 123                         rpc->gid = gid;
 124                 }
 125         }
 126 }
 127
 128 void rpc_set_uid(struct rpc_context *rpc, int uid) {
 129         rpc_set_uid_gid(rpc, uid, rpc->gid);
 130 }
 131
 132 void rpc_set_gid(struct rpc_context *rpc, int gid) {
 133         rpc_set_uid_gid(rpc, rpc->uid, gid);
 134 }
 135
 136 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...)
 137 {
 138         va_list ap;
 139         char *old_error_string = rpc->error_string;
 140
 141         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 142
 143         va_start(ap, error_string);
 144         rpc->error_string = malloc(1024);
 145         vsnprintf(rpc->error_string, 1024, error_string, ap);
 146         va_end(ap);
 147
 148         if (old_error_string != NULL) {
 149                 free(old_error_string);
 150         }
 151 }
 152
 153 char *rpc_get_error(struct rpc_context *rpc)
 154 {
 155         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 156
 157         return rpc->error_string;
 158 }
 159
 160 void rpc_error_all_pdus(struct rpc_context *rpc, char *error)
 161 {
 162         struct rpc_pdu *pdu, *next;
 163         unsigned int i;
 164
 165         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 166
 167         while ((pdu = rpc->outqueue.head) != NULL) {
 168                 pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 169                 rpc->outqueue.head = pdu->next;
 170                 rpc_free_pdu(rpc, pdu);
 171         }
 172         rpc->outqueue.tail = NULL;
 173
 174         for (i = 0; i < HASHES; i++) {
 175                 struct rpc_queue *q = &rpc->waitpdu[i];
 176
 177                 while((pdu = q->head) != NULL) {
 178                         pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 179                         q->head = pdu->next;
 180                         rpc_free_pdu(rpc, pdu);
 181                 }
 182                 q->tail = NULL;
 183         }
 184 }
 185
 186 static void rpc_free_fragment(struct rpc_fragment *fragment)
 187 {
 188         if (fragment->data != NULL) {
 189                 free(fragment->data);
 190         }
 191         free(fragment);
 192 }
 193
 194 void rpc_free_all_fragments(struct rpc_context *rpc)
 195 {
 196         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 197
 198         while (rpc->fragments != NULL) {
 199               struct rpc_fragment *fragment = rpc->fragments;
 200
 201               rpc->fragments = fragment->next;
 202               rpc_free_fragment(fragment);
 203         }
 204 }
 205
 206 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size)
 207 {
 208         struct rpc_fragment *fragment;
 209
 210         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 211
 212         fragment = malloc(sizeof(struct rpc_fragment));
 213         if (fragment == NULL) {
 214                 return -1;
 215         }
 216
 217         fragment->size = size;
 218         fragment->data = malloc(fragment->size);
 219         if(fragment->data == NULL) {
 220                 free(fragment);
 221                 return -1;
 222         }
 223
 224         memcpy(fragment->data, data, fragment->size);
 225         LIBNFS_LIST_ADD_END(&rpc->fragments, fragment);
 226         return 0;
 227 }
 228
 229 void rpc_destroy_context(struct rpc_context *rpc)
 230 {
 231         struct rpc_pdu *pdu;
 232         unsigned int i;
 233
 234         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 235
 236         while((pdu = rpc->outqueue.head) != NULL) {
 237                 pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 238                 rpc->outqueue.head = pdu->next;
 239                 rpc_free_pdu(rpc, pdu);
 240         }
 241
 242         for (i = 0; i < HASHES; i++) {
 243                 struct rpc_queue *q = &rpc->waitpdu[i];
 244
 245                 while((pdu = q->head) != NULL) {
 246                         pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 247                         rpc->outqueue.head = pdu->next;
 248                         rpc_free_pdu(rpc, pdu);
 249                 }
 250         }
 251
 252         rpc_free_all_fragments(rpc);
 253
 254         auth_destroy(rpc->auth);
 255         rpc->auth =NULL;
 256
 257         if (rpc->fd != -1) {
 258                 close(rpc->fd);
 259         }
 260
 261         if (rpc->encodebuf != NULL) {
 262                 free(rpc->encodebuf);
 263                 rpc->encodebuf = NULL;
 264         }
 265
 266         if (rpc->error_string != NULL) {
 267                 free(rpc->error_string);
 268                 rpc->error_string = NULL;
 269         }
 270
 271         if (rpc->udp_dest != NULL) {
 272                 free(rpc->udp_dest);
 273                 rpc->udp_dest = NULL;
 274         }
 275
 276         rpc->magic = 0;
 277         free(rpc);
 278 }
 279
 280