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         rpc_reset_queue(&rpc->outqueue);
  87         rpc_reset_queue(&rpc->waitpdu);
  88
  89         return rpc;
  90 }
  91
  92
  93 struct rpc_context *rpc_init_udp_context(void)
  94 {
  95         struct rpc_context *rpc;
  96
  97         rpc = rpc_init_context();
  98         if (rpc != NULL) {
  99                 rpc->is_udp = 1;
 100         }
 101
 102         return rpc;
 103 }
 104
 105 void rpc_set_auth(struct rpc_context *rpc, struct AUTH *auth)
 106 {
 107         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 108
 109         if (rpc->auth != NULL) {
 110                 auth_destroy(rpc->auth);
 111         }
 112         rpc->auth = auth;
 113 }
 114
 115 static void rpc_set_uid_gid(struct rpc_context *rpc, int uid, int gid) {
 116         if (uid != rpc->uid || gid != rpc->gid) {
 117                 struct AUTH *auth = libnfs_authunix_create("libnfs", uid, gid, 0, NULL);
 118                 if (auth != NULL) {
 119                         rpc_set_auth(rpc, auth);
 120                         rpc->uid = uid;
 121                         rpc->gid = gid;
 122                 }
 123         }
 124 }
 125
 126 void rpc_set_uid(struct rpc_context *rpc, int uid) {
 127         rpc_set_uid_gid(rpc, uid, rpc->gid);
 128 }
 129
 130 void rpc_set_gid(struct rpc_context *rpc, int gid) {
 131         rpc_set_uid_gid(rpc, rpc->uid, gid);
 132 }
 133
 134 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...)
 135 {
 136         va_list ap;
 137         char *old_error_string = rpc->error_string;
 138
 139         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 140
 141         va_start(ap, error_string);
 142         rpc->error_string = malloc(1024);
 143         vsnprintf(rpc->error_string, 1024, error_string, ap);
 144         va_end(ap);
 145
 146         if (old_error_string != NULL) {
 147                 free(old_error_string);
 148         }
 149 }
 150
 151 char *rpc_get_error(struct rpc_context *rpc)
 152 {
 153         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 154
 155         return rpc->error_string;
 156 }
 157
 158 void rpc_error_all_pdus(struct rpc_context *rpc, char *error)
 159 {
 160         struct rpc_pdu *pdu, *next;
 161
 162         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 163
 164         while ((pdu = rpc->outqueue.head) != NULL) {
 165                 pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 166                 rpc->outqueue.head = pdu->next;
 167                 rpc_free_pdu(rpc, pdu);
 168         }
 169         rpc->outqueue.tail = NULL;
 170
 171         while((pdu = rpc->waitpdu.head) != NULL) {
 172                 pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 173                 rpc->waitpdu.head = pdu->next;
 174                 rpc_free_pdu(rpc, pdu);
 175         }
 176         rpc->waitpdu.tail = NULL;
 177 }
 178
 179 static void rpc_free_fragment(struct rpc_fragment *fragment)
 180 {
 181         if (fragment->data != NULL) {
 182                 free(fragment->data);
 183         }
 184         free(fragment);
 185 }
 186
 187 void rpc_free_all_fragments(struct rpc_context *rpc)
 188 {
 189         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 190
 191         while (rpc->fragments != NULL) {
 192               struct rpc_fragment *fragment = rpc->fragments;
 193
 194               rpc->fragments = fragment->next;
 195               rpc_free_fragment(fragment);
 196         }
 197 }
 198
 199 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size)
 200 {
 201         struct rpc_fragment *fragment;
 202
 203         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 204
 205         fragment = malloc(sizeof(struct rpc_fragment));
 206         if (fragment == NULL) {
 207                 return -1;
 208         }
 209
 210         fragment->size = size;
 211         fragment->data = malloc(fragment->size);
 212         if(fragment->data == NULL) {
 213                 free(fragment);
 214                 return -1;
 215         }
 216
 217         memcpy(fragment->data, data, fragment->size);
 218         SLIST_ADD_END(&rpc->fragments, fragment);
 219         return 0;
 220 }
 221
 222 void rpc_destroy_context(struct rpc_context *rpc)
 223 {
 224         struct rpc_pdu *pdu;
 225
 226         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 227
 228         while((pdu = rpc->outqueue.head) != NULL) {
 229                 pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 230                 rpc->outqueue.head = pdu->next;
 231                 rpc_free_pdu(rpc, pdu);
 232         }
 233         while((pdu = rpc->waitpdu.head) != NULL) {
 234                 pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 235                 rpc->outqueue.head = pdu->next;
 236                 rpc_free_pdu(rpc, pdu);
 237         }
 238
 239         rpc_free_all_fragments(rpc);
 240
 241         auth_destroy(rpc->auth);
 242         rpc->auth =NULL;
 243
 244         if (rpc->fd != -1) {
 245                 close(rpc->fd);
 246         }
 247
 248         if (rpc->encodebuf != NULL) {
 249                 free(rpc->encodebuf);
 250                 rpc->encodebuf = NULL;
 251         }
 252
 253         if (rpc->error_string != NULL) {
 254                 free(rpc->error_string);
 255                 rpc->error_string = NULL;
 256         }
 257
 258         if (rpc->udp_dest != NULL) {
 259                 free(rpc->udp_dest);
 260                 rpc->udp_dest = NULL;
 261         }
 262
 263         rpc->magic = 0;
 264         free(rpc);
 265 }
 266
 267