include/libnfs-private.h

   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 #include <rpc/xdr.h>
  18 #include <rpc/auth.h>
  19
  20 struct rpc_context {
  21         int fd;
  22         int is_connected;
  23
  24         char *error_string;
  25
  26         rpc_cb connect_cb;
  27         void *connect_data;
  28
  29         AUTH *auth;
  30         unsigned long xid;
  31
  32        /* buffer used for encoding RPC PDU */
  33        char *encodebuf;
  34        int encodebuflen;
  35
  36        struct rpc_pdu *outqueue;
  37        struct sockaddr_storage udp_src;
  38        struct rpc_pdu *waitpdu;
  39
  40        int inpos;
  41        int insize;
  42        char *inbuf;
  43
  44        /* special fields for UDP, which can sometimes be BROADCASTed */
  45        int is_udp;
  46        struct sockaddr *udp_dest;
  47        int is_broadcast;
  48
  49        /* track the address we connect to so we can auto-reconnect on session failure */
  50        struct sockaddr_storage s;
  51        int auto_reconnect;
  52 };
  53
  54 struct rpc_pdu {
  55         struct rpc_pdu *next;
  56
  57         unsigned long xid;
  58         XDR xdr;
  59
  60         int written;
  61         struct rpc_data outdata;
  62
  63         rpc_cb cb;
  64         void *private_data;
  65
  66         /* function to decode the xdr reply data and buffer to decode into */
  67         xdrproc_t xdr_decode_fn;
  68         caddr_t xdr_decode_buf;
  69         int xdr_decode_bufsize;
  70 };
  71
  72 struct rpc_pdu *rpc_allocate_pdu(struct rpc_context *rpc, int program, int version, int procedure, rpc_cb cb, void *private_data, xdrproc_t xdr_decode_fn, int xdr_bufsize);
  73 void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
  74 int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
  75 int rpc_get_pdu_size(char *buf);
  76 int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size);
  77 void rpc_error_all_pdus(struct rpc_context *rpc, char *error);
  78
  79 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...);
  80 void nfs_set_error(struct nfs_context *nfs, char *error_string, ...);
  81
  82 struct rpc_context *nfs_get_rpc_context(struct nfs_context *nfs);
  83 const char *nfs_get_server(struct nfs_context *nfs);
  84 const char *nfs_get_export(struct nfs_context *nfs);
  85
  86 /* we dont want to expose UDP to normal applications/users  this is private to libnfs to use exclusively for broadcast RPC */
  87 int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port);
  88 int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast);
  89 struct rpc_context *rpc_init_udp_context(void);
  90 struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc);
  91
  92 void rpc_set_autoreconnect(struct rpc_context *rpc);
  93 void rpc_unset_autoreconnect(struct rpc_context *rpc);
  94