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[deb_libnfs.git] / include / libnfs-private.h
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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" /* HAVE_SOCKADDR_STORAGE ? */
19#endif
20
21#include <sys/socket.h> /* struct sockaddr_storage */
22
23#include "libnfs-zdr.h"
24
25#ifndef HAVE_SOCKADDR_STORAGE
26/*
27 * RFC 2553: protocol-independent placeholder for socket addresses
28 */
29#define _SS_MAXSIZE 128
30#define _SS_ALIGNSIZE (sizeof(double))
31#define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(unsigned char) * 2)
32#define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(unsigned char) * 2 - \
33 _SS_PAD1SIZE - _SS_ALIGNSIZE)
34
35struct sockaddr_storage {
36#ifdef HAVE_SOCKADDR_LEN
37 unsigned char ss_len; /* address length */
38 unsigned char ss_family; /* address family */
39#else
40 unsigned short ss_family;
41#endif
42 char __ss_pad1[_SS_PAD1SIZE];
43 double __ss_align; /* force desired structure storage alignment */
44 char __ss_pad2[_SS_PAD2SIZE];
45};
46#endif
47
48
49struct rpc_fragment {
50 struct rpc_fragment *next;
51 uint64_t size;
52 char *data;
53};
54
55#define RPC_CONTEXT_MAGIC 0xc6e46435
56
57struct rpc_context {
58 uint32_t magic;
59 int fd;
60 int is_connected;
61
62 char *error_string;
63
64 rpc_cb connect_cb;
65 void *connect_data;
66
67 struct AUTH *auth;
68 unsigned long xid;
69
70 /* buffer used for encoding RPC PDU */
71 char *encodebuf;
72 int encodebuflen;
73
74 struct rpc_pdu *outqueue;
75 struct sockaddr_storage udp_src;
76 struct rpc_pdu *waitpdu;
77
78 uint32_t inpos;
79 uint32_t insize;
80 char *inbuf;
81
82 /* special fields for UDP, which can sometimes be BROADCASTed */
83 int is_udp;
84 struct sockaddr *udp_dest;
85 int is_broadcast;
86
87 /* track the address we connect to so we can auto-reconnect on session failure */
88 struct sockaddr_storage s;
89 int auto_reconnect;
90
91 /* fragment reassembly */
92 struct rpc_fragment *fragments;
93};
94
95struct rpc_pdu {
96 struct rpc_pdu *next;
97
98 unsigned long xid;
99 ZDR zdr;
100
101 uint32_t written;
102 struct rpc_data outdata;
103
104 rpc_cb cb;
105 void *private_data;
106
107 /* function to decode the zdr reply data and buffer to decode into */
108 zdrproc_t zdr_decode_fn;
109 caddr_t zdr_decode_buf;
110 uint32_t zdr_decode_bufsize;
111};
112
113struct 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);
114void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
115int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
116int rpc_get_pdu_size(char *buf);
117int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size);
118void rpc_error_all_pdus(struct rpc_context *rpc, char *error);
119
120void rpc_set_error(struct rpc_context *rpc, char *error_string, ...);
121void nfs_set_error(struct nfs_context *nfs, char *error_string, ...);
122
123const char *nfs_get_server(struct nfs_context *nfs);
124const char *nfs_get_export(struct nfs_context *nfs);
125
126/* we dont want to expose UDP to normal applications/users this is private to libnfs to use exclusively for broadcast RPC */
127int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port);
128int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast);
129struct rpc_context *rpc_init_udp_context(void);
130struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc);
131
132void rpc_set_autoreconnect(struct rpc_context *rpc);
133void rpc_unset_autoreconnect(struct rpc_context *rpc);
134
135int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size);
136void rpc_free_all_fragments(struct rpc_context *rpc);
137
138const struct nfs_fh3 *nfs_get_rootfh(struct nfs_context *nfs);