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84004dbf RS |
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 | */ | |
d7c6e9aa RS |
17 | #ifdef HAVE_CONFIG_H |
18 | #include "config.h" /* HAVE_SOCKADDR_STORAGE ? */ | |
19 | #endif | |
20 | ||
763cd6e3 RS |
21 | #include <sys/socket.h> /* struct sockaddr_storage */ |
22 | ||
23 | #include "libnfs-zdr.h" | |
84004dbf | 24 | |
d7c6e9aa RS |
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 | ||
35 | struct sockaddr_storage { | |
36 | #ifdef HAVE_SA_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 | ||
d678b73e RS |
49 | struct rpc_fragment { |
50 | struct rpc_fragment *next; | |
183451cf | 51 | uint64_t size; |
d678b73e RS |
52 | char *data; |
53 | }; | |
54 | ||
f3a75078 RS |
55 | #define RPC_CONTEXT_MAGIC 0xc6e46435 |
56 | ||
84004dbf | 57 | struct rpc_context { |
f3a75078 | 58 | uint32_t magic; |
84004dbf RS |
59 | int fd; |
60 | int is_connected; | |
61 | ||
62 | char *error_string; | |
63 | ||
64 | rpc_cb connect_cb; | |
65 | void *connect_data; | |
66 | ||
67ba2239 | 67 | struct AUTH *auth; |
84004dbf RS |
68 | unsigned long xid; |
69 | ||
70 | /* buffer used for encoding RPC PDU */ | |
71 | char *encodebuf; | |
72 | int encodebuflen; | |
73 | ||
74 | struct rpc_pdu *outqueue; | |
2d0c44ce | 75 | struct sockaddr_storage udp_src; |
84004dbf RS |
76 | struct rpc_pdu *waitpdu; |
77 | ||
d14e2838 RS |
78 | uint32_t inpos; |
79 | uint32_t insize; | |
84004dbf | 80 | char *inbuf; |
d16a3ca4 RS |
81 | |
82 | /* special fields for UDP, which can sometimes be BROADCASTed */ | |
83 | int is_udp; | |
a9b24162 | 84 | struct sockaddr *udp_dest; |
2ae46066 | 85 | int is_broadcast; |
1744ef90 RS |
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; | |
d678b73e RS |
90 | |
91 | /* fragment reassembly */ | |
92 | struct rpc_fragment *fragments; | |
84004dbf RS |
93 | }; |
94 | ||
95 | struct rpc_pdu { | |
96 | struct rpc_pdu *next; | |
97 | ||
98 | unsigned long xid; | |
763cd6e3 | 99 | ZDR zdr; |
84004dbf | 100 | |
d14e2838 | 101 | uint32_t written; |
84004dbf RS |
102 | struct rpc_data outdata; |
103 | ||
104 | rpc_cb cb; | |
105 | void *private_data; | |
106 | ||
763cd6e3 RS |
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; | |
d14e2838 | 110 | uint32_t zdr_decode_bufsize; |
84004dbf RS |
111 | }; |
112 | ||
763cd6e3 | 113 | 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); |
84004dbf RS |
114 | void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu); |
115 | int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu); | |
116 | int rpc_get_pdu_size(char *buf); | |
117 | int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size); | |
118 | void rpc_error_all_pdus(struct rpc_context *rpc, char *error); | |
119 | ||
1896d37b RS |
120 | void rpc_set_error(struct rpc_context *rpc, char *error_string, ...); |
121 | void nfs_set_error(struct nfs_context *nfs, char *error_string, ...); | |
122 | ||
b077fdeb RS |
123 | const char *nfs_get_server(struct nfs_context *nfs); |
124 | const char *nfs_get_export(struct nfs_context *nfs); | |
1896d37b | 125 | |
485bc9b9 RS |
126 | /* we dont want to expose UDP to normal applications/users this is private to libnfs to use exclusively for broadcast RPC */ |
127 | int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port); | |
5bf60dc6 | 128 | int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast); |
9e00b8c6 | 129 | struct rpc_context *rpc_init_udp_context(void); |
c481da67 RS |
130 | struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc); |
131 | ||
1744ef90 RS |
132 | void rpc_set_autoreconnect(struct rpc_context *rpc); |
133 | void rpc_unset_autoreconnect(struct rpc_context *rpc); | |
134 | ||
183451cf | 135 | int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size); |
d678b73e RS |
136 | void rpc_free_all_fragments(struct rpc_context *rpc); |
137 | ||
8724c833 | 138 | const struct nfs_fh3 *nfs_get_rootfh(struct nfs_context *nfs); |