lib/init.c

   1 /*
   2    Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as published by
   6    the Free Software Foundation; either version 2.1 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #ifdef AROS
  22 #include "aros_compat.h"
  23 #endif
  24
  25 #ifdef WIN32
  26 #include "win32_compat.h"
  27 #endif
  28
  29 #define _GNU_SOURCE
  30
  31 #ifdef HAVE_UNISTD_H
  32 #include <unistd.h>
  33 #endif
  34
  35 #ifdef HAVE_STRINGS_H
  36 #include <strings.h>
  37 #endif
  38
  39 #include <stdio.h>
  40 #include <stdarg.h>
  41 #include <string.h>
  42 #include <stdlib.h>
  43 #include <assert.h>
  44 #include <time.h>
  45 #include "slist.h"
  46 #include "libnfs-zdr.h"
  47 #include "libnfs.h"
  48 #include "libnfs-raw.h"
  49 #include "libnfs-private.h"
  50
  51 struct rpc_context *rpc_init_context(void)
  52 {
  53         struct rpc_context *rpc;
  54         static uint32_t salt = 0;
  55         unsigned int i;
  56
  57         rpc = malloc(sizeof(struct rpc_context));
  58         if (rpc == NULL) {
  59                 return NULL;
  60         }
  61         memset(rpc, 0, sizeof(struct rpc_context));
  62
  63         rpc->magic = RPC_CONTEXT_MAGIC;
  64
  65         /* Allow 1M of data (for writes) and some */
  66         rpc->encodebuflen = 1024 * 1024 + 4096;
  67         rpc->encodebuf = malloc(rpc->encodebuflen);
  68         if (rpc->encodebuf == NULL) {
  69                 free(rpc);
  70                 return NULL;
  71         }
  72
  73         rpc->auth = authunix_create_default();
  74         if (rpc->auth == NULL) {
  75                 free(rpc->encodebuf);
  76                 free(rpc);
  77                 return NULL;
  78         }
  79         rpc->xid = salt + time(NULL) + getpid() << 16;
  80         salt += 0x01000000;
  81         rpc->fd = -1;
  82         rpc->tcp_syncnt = RPC_PARAM_UNDEFINED;
  83 #if defined(WIN32) || defined(ANDROID)
  84         rpc->uid = 65534;
  85         rpc->gid = 65534;
  86 #else
  87         rpc->uid = getuid();
  88         rpc->gid = getgid();
  89 #endif
  90         rpc_reset_queue(&rpc->outqueue);
  91         for (i = 0; i < HASHES; i++)
  92                 rpc_reset_queue(&rpc->waitpdu[i]);
  93
  94         return rpc;
  95 }
  96
  97
  98 struct rpc_context *rpc_init_udp_context(void)
  99 {
 100         struct rpc_context *rpc;
 101
 102         rpc = rpc_init_context();
 103         if (rpc != NULL) {
 104                 rpc->is_udp = 1;
 105         }
 106
 107         return rpc;
 108 }
 109
 110 void rpc_set_auth(struct rpc_context *rpc, struct AUTH *auth)
 111 {
 112         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 113
 114         if (rpc->auth != NULL) {
 115                 auth_destroy(rpc->auth);
 116         }
 117         rpc->auth = auth;
 118 }
 119
 120 static void rpc_set_uid_gid(struct rpc_context *rpc, int uid, int gid) {
 121         if (uid != rpc->uid || gid != rpc->gid) {
 122                 struct AUTH *auth = libnfs_authunix_create("libnfs", uid, gid, 0, NULL);
 123                 if (auth != NULL) {
 124                         rpc_set_auth(rpc, auth);
 125                         rpc->uid = uid;
 126                         rpc->gid = gid;
 127                 }
 128         }
 129 }
 130
 131 void rpc_set_uid(struct rpc_context *rpc, int uid) {
 132         rpc_set_uid_gid(rpc, uid, rpc->gid);
 133 }
 134
 135 void rpc_set_gid(struct rpc_context *rpc, int gid) {
 136         rpc_set_uid_gid(rpc, rpc->uid, gid);
 137 }
 138
 139 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...)
 140 {
 141         va_list ap;
 142         char *old_error_string = rpc->error_string;
 143
 144         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 145
 146         va_start(ap, error_string);
 147         rpc->error_string = malloc(1024);
 148         vsnprintf(rpc->error_string, 1024, error_string, ap);
 149         va_end(ap);
 150
 151         if (old_error_string != NULL) {
 152                 free(old_error_string);
 153         }
 154 }
 155
 156 char *rpc_get_error(struct rpc_context *rpc)
 157 {
 158         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 159
 160         return rpc->error_string;
 161 }
 162
 163 void rpc_error_all_pdus(struct rpc_context *rpc, char *error)
 164 {
 165         struct rpc_pdu *pdu, *next;
 166         unsigned int i;
 167
 168         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 169
 170         while ((pdu = rpc->outqueue.head) != NULL) {
 171                 pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 172                 rpc->outqueue.head = pdu->next;
 173                 rpc_free_pdu(rpc, pdu);
 174         }
 175         rpc->outqueue.tail = NULL;
 176
 177         for (i = 0; i < HASHES; i++) {
 178                 struct rpc_queue *q = &rpc->waitpdu[i];
 179
 180                 while((pdu = q->head) != NULL) {
 181                         pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 182                         q->head = pdu->next;
 183                         rpc_free_pdu(rpc, pdu);
 184                 }
 185                 q->tail = NULL;
 186         }
 187 }
 188
 189 static void rpc_free_fragment(struct rpc_fragment *fragment)
 190 {
 191         if (fragment->data != NULL) {
 192                 free(fragment->data);
 193         }
 194         free(fragment);
 195 }
 196
 197 void rpc_free_all_fragments(struct rpc_context *rpc)
 198 {
 199         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 200
 201         while (rpc->fragments != NULL) {
 202               struct rpc_fragment *fragment = rpc->fragments;
 203
 204               rpc->fragments = fragment->next;
 205               rpc_free_fragment(fragment);
 206         }
 207 }
 208
 209 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size)
 210 {
 211         struct rpc_fragment *fragment;
 212
 213         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 214
 215         fragment = malloc(sizeof(struct rpc_fragment));
 216         if (fragment == NULL) {
 217                 return -1;
 218         }
 219
 220         fragment->size = size;
 221         fragment->data = malloc(fragment->size);
 222         if(fragment->data == NULL) {
 223                 free(fragment);
 224                 return -1;
 225         }
 226
 227         memcpy(fragment->data, data, fragment->size);
 228         LIBNFS_LIST_ADD_END(&rpc->fragments, fragment);
 229         return 0;
 230 }
 231
 232 void rpc_destroy_context(struct rpc_context *rpc)
 233 {
 234         struct rpc_pdu *pdu;
 235         unsigned int i;
 236
 237         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 238
 239         while((pdu = rpc->outqueue.head) != NULL) {
 240                 pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 241                 LIBNFS_LIST_REMOVE(&rpc->outqueue.head, pdu);
 242                 rpc_free_pdu(rpc, pdu);
 243         }
 244
 245         for (i = 0; i < HASHES; i++) {
 246                 struct rpc_queue *q = &rpc->waitpdu[i];
 247
 248                 while((pdu = q->head) != NULL) {
 249                         pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 250                         LIBNFS_LIST_REMOVE(&q->head, pdu);
 251                         rpc_free_pdu(rpc, pdu);
 252                 }
 253         }
 254
 255         rpc_free_all_fragments(rpc);
 256
 257         auth_destroy(rpc->auth);
 258         rpc->auth =NULL;
 259
 260         if (rpc->fd != -1) {
 261                 close(rpc->fd);
 262         }
 263
 264         if (rpc->encodebuf != NULL) {
 265                 free(rpc->encodebuf);
 266                 rpc->encodebuf = NULL;
 267         }
 268
 269         if (rpc->error_string != NULL) {
 270                 free(rpc->error_string);
 271                 rpc->error_string = NULL;
 272         }
 273
 274         if (rpc->udp_dest != NULL) {
 275                 free(rpc->udp_dest);
 276                 rpc->udp_dest = NULL;
 277         }
 278
 279         rpc->magic = 0;
 280         free(rpc);
 281 }
 282
 283