c12d95909ab39a53dbaf293082f7e44fc48a61ba
[deb_libnfs.git] / 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 <sys/socket.h> /* struct sockaddr_storage */
18
19 #include "libnfs-zdr.h"
20
21 struct rpc_fragment {
22 struct rpc_fragment *next;
23 uint64_t size;
24 char *data;
25 };
26
27 struct rpc_context {
28 int fd;
29 int is_connected;
30
31 char *error_string;
32
33 rpc_cb connect_cb;
34 void *connect_data;
35
36 AUTH *auth;
37 unsigned long xid;
38
39 /* buffer used for encoding RPC PDU */
40 char *encodebuf;
41 int encodebuflen;
42
43 struct rpc_pdu *outqueue;
44 struct sockaddr_storage udp_src;
45 struct rpc_pdu *waitpdu;
46
47 uint32_t inpos;
48 uint32_t insize;
49 char *inbuf;
50
51 /* special fields for UDP, which can sometimes be BROADCASTed */
52 int is_udp;
53 struct sockaddr *udp_dest;
54 int is_broadcast;
55
56 /* track the address we connect to so we can auto-reconnect on session failure */
57 struct sockaddr_storage s;
58 int auto_reconnect;
59
60 /* fragment reassembly */
61 struct rpc_fragment *fragments;
62 };
63
64 struct rpc_pdu {
65 struct rpc_pdu *next;
66
67 unsigned long xid;
68 ZDR zdr;
69
70 uint32_t written;
71 struct rpc_data outdata;
72
73 rpc_cb cb;
74 void *private_data;
75
76 /* function to decode the zdr reply data and buffer to decode into */
77 zdrproc_t zdr_decode_fn;
78 caddr_t zdr_decode_buf;
79 uint32_t zdr_decode_bufsize;
80 };
81
82 struct rpc_pdu *rpc_allocate_pdu(struct rpc_context *rpc, int program, int version, int procedure, rpc_cb cb, void *private_data, zdrproc_t zdr_decode_fn, int zdr_bufsize);
83 void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
84 int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
85 int rpc_get_pdu_size(char *buf);
86 int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size);
87 void rpc_error_all_pdus(struct rpc_context *rpc, char *error);
88
89 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...);
90 void nfs_set_error(struct nfs_context *nfs, char *error_string, ...);
91
92 const char *nfs_get_server(struct nfs_context *nfs);
93 const char *nfs_get_export(struct nfs_context *nfs);
94
95 /* we dont want to expose UDP to normal applications/users this is private to libnfs to use exclusively for broadcast RPC */
96 int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port);
97 int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast);
98 struct rpc_context *rpc_init_udp_context(void);
99 struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc);
100
101 void rpc_set_autoreconnect(struct rpc_context *rpc);
102 void rpc_unset_autoreconnect(struct rpc_context *rpc);
103
104 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size);
105 void rpc_free_all_fragments(struct rpc_context *rpc);
106
107 const struct nfs_fh3 *nfs_get_rootfh(struct nfs_context *nfs);