1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* Copyright (C) 2009-2012 the libgit2 contributors
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#ifndef INCLUDE_git_transport_h__
#define INCLUDE_git_transport_h__
#include "indexer.h"
#include "net.h"
/**
* @file git2/transport.h
* @brief Git transport interfaces and functions
* @defgroup git_transport interfaces and functions
* @ingroup Git
* @{
*/
GIT_BEGIN_DECL
/*
*** Begin base transport interface ***
*/
typedef enum {
GIT_TRANSPORTFLAGS_NONE = 0,
/* If the connection is secured with SSL/TLS, the authenticity
* of the server certificate should not be verified. */
GIT_TRANSPORTFLAGS_NO_CHECK_CERT = 1
} git_transport_flags_t;
typedef void (*git_transport_message_cb)(const char *str, int len, void *data);
typedef struct git_transport {
/* Set progress and error callbacks */
int (*set_callbacks)(struct git_transport *transport,
git_transport_message_cb progress_cb,
git_transport_message_cb error_cb,
void *payload);
/* Connect the transport to the remote repository, using the given
* direction. */
int (*connect)(struct git_transport *transport,
const char *url,
int direction,
int flags);
/* This function may be called after a successful call to connect(). The
* provided callback is invoked for each ref discovered on the remote
* end. */
int (*ls)(struct git_transport *transport,
git_headlist_cb list_cb,
void *payload);
/* Reserved until push is implemented. */
int (*push)(struct git_transport *transport);
/* This function may be called after a successful call to connect(), when
* the direction is FETCH. The function performs a negotiation to calculate
* the wants list for the fetch. */
int (*negotiate_fetch)(struct git_transport *transport,
git_repository *repo,
const git_remote_head * const *refs,
size_t count);
/* This function may be called after a successful call to negotiate_fetch(),
* when the direction is FETCH. This function retrieves the pack file for
* the fetch from the remote end. */
int (*download_pack)(struct git_transport *transport,
git_repository *repo,
git_transfer_progress *stats,
git_transfer_progress_callback progress_cb,
void *progress_payload);
/* Checks to see if the transport is connected */
int (*is_connected)(struct git_transport *transport, int *connected);
/* Reads the flags value previously passed into connect() */
int (*read_flags)(struct git_transport *transport, int *flags);
/* Cancels any outstanding transport operation */
void (*cancel)(struct git_transport *transport);
/* This function is the reverse of connect() -- it terminates the
* connection to the remote end. */
int (*close)(struct git_transport *transport);
/* Frees/destructs the git_transport object. */
void (*free)(struct git_transport *transport);
} git_transport;
/**
* Function to use to create a transport from a URL. The transport database
* is scanned to find a transport that implements the scheme of the URI (i.e.
* git:// or http://) and a transport object is returned to the caller.
*
* @param transport The newly created transport (out)
* @param url The URL to connect to
* @return 0 or an error code
*/
GIT_EXTERN(int) git_transport_new(git_transport **transport, const char *url);
/**
* Function which checks to see if a transport could be created for the
* given URL (i.e. checks to see if libgit2 has a transport that supports
* the given URL's scheme)
*
* @param url The URL to check
* @return Zero if the URL is not valid; nonzero otherwise
*/
GIT_EXTERN(int) git_transport_valid_url(const char *url);
/* Signature of a function which creates a transport */
typedef int (*git_transport_cb)(git_transport **transport, void *param);
/* Transports which come with libgit2 (match git_transport_cb). The expected
* value for "param" is listed in-line below. */
/**
* Create an instance of the dummy transport.
*
* @param transport The newly created transport (out)
* @param param You must pass NULL for this parameter.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_transport_dummy(
git_transport **transport,
/* NULL */ void *param);
/**
* Create an instance of the local transport.
*
* @param transport The newly created transport (out)
* @param param You must pass NULL for this parameter.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_transport_local(
git_transport **transport,
/* NULL */ void *param);
/**
* Create an instance of the smart transport.
*
* @param transport The newly created transport (out)
* @param param A pointer to a git_smart_subtransport_definition
* @return 0 or an error code
*/
GIT_EXTERN(int) git_transport_smart(
git_transport **transport,
/* (git_smart_subtransport_definition *) */ void *param);
/*
*** End of base transport interface ***
*** Begin interface for subtransports for the smart transport ***
*/
/* The smart transport knows how to speak the git protocol, but it has no
* knowledge of how to establish a connection between it and another endpoint,
* or how to move data back and forth. For this, a subtransport interface is
* declared, and the smart transport delegates this work to the subtransports.
* Three subtransports are implemented: git, http, and winhttp. (The http and
* winhttp transports each implement both http and https.) */
/* Subtransports can either be RPC = 0 (persistent connection) or RPC = 1
* (request/response). The smart transport handles the differences in its own
* logic. The git subtransport is RPC = 0, while http and winhttp are both
* RPC = 1. */
/* Actions that the smart transport can ask
* a subtransport to perform */
typedef enum {
GIT_SERVICE_UPLOADPACK_LS = 1,
GIT_SERVICE_UPLOADPACK = 2,
} git_smart_service_t;
struct git_smart_subtransport;
/* A stream used by the smart transport to read and write data
* from a subtransport */
typedef struct git_smart_subtransport_stream {
/* The owning subtransport */
struct git_smart_subtransport *subtransport;
int (*read)(
struct git_smart_subtransport_stream *stream,
char *buffer,
size_t buf_size,
size_t *bytes_read);
int (*write)(
struct git_smart_subtransport_stream *stream,
const char *buffer,
size_t len);
void (*free)(
struct git_smart_subtransport_stream *stream);
} git_smart_subtransport_stream;
/* An implementation of a subtransport which carries data for the
* smart transport */
typedef struct git_smart_subtransport {
int (* action)(
git_smart_subtransport_stream **out,
struct git_smart_subtransport *transport,
const char *url,
git_smart_service_t action);
void (* free)(struct git_smart_subtransport *transport);
} git_smart_subtransport;
/* A function which creates a new subtransport for the smart transport */
typedef int (*git_smart_subtransport_cb)(
git_smart_subtransport **out,
git_transport* owner);
typedef struct git_smart_subtransport_definition {
/* The function to use to create the git_smart_subtransport */
git_smart_subtransport_cb callback;
/* True if the protocol is stateless; false otherwise. For example,
* http:// is stateless, but git:// is not. */
unsigned rpc : 1;
} git_smart_subtransport_definition;
/* Smart transport subtransports that come with libgit2 */
/**
* Create an instance of the http subtransport. This subtransport
* also supports https. On Win32, this subtransport may be implemented
* using the WinHTTP library.
*
* @param out The newly created subtransport
* @param owner The smart transport to own this subtransport
* @return 0 or an error code
*/
GIT_EXTERN(int) git_smart_subtransport_http(
git_smart_subtransport **out,
git_transport* owner);
/**
* Create an instance of the git subtransport.
*
* @param out The newly created subtransport
* @param owner The smart transport to own this subtransport
* @return 0 or an error code
*/
GIT_EXTERN(int) git_smart_subtransport_git(
git_smart_subtransport **out,
git_transport* owner);
/*
*** End interface for subtransports for the smart transport ***
*/
/** @} */
GIT_END_DECL
#endif
|
