/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* 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"
#include "types.h"
/**
* @file git2/transport.h
* @brief Git transport interfaces and functions
* @defgroup git_transport interfaces and functions
* @ingroup Git
* @{
*/
GIT_BEGIN_DECL
/*
*** Begin interface for credentials acquisition ***
*/
typedef enum {
/* git_cred_userpass_plaintext */
GIT_CREDTYPE_USERPASS_PLAINTEXT = 1,
} git_credtype_t;
/* The base structure for all credential types */
typedef struct git_cred {
git_credtype_t credtype;
void (*free)(
struct git_cred *cred);
} git_cred;
/* A plaintext username and password */
typedef struct git_cred_userpass_plaintext {
git_cred parent;
char *username;
char *password;
} git_cred_userpass_plaintext;
/**
* Creates a new plain-text username and password credential object.
* The supplied credential parameter will be internally duplicated.
*
* @param out The newly created credential object.
* @param username The username of the credential.
* @param password The password of the credential.
* @return 0 for success or an error code for failure
*/
GIT_EXTERN(int) git_cred_userpass_plaintext_new(
git_cred **out,
const char *username,
const char *password);
/**
* Signature of a function which acquires a credential object.
*
* @param cred The newly created credential object.
* @param url The resource for which we are demanding a credential.
* @param allowed_types A bitmask stating which cred types are OK to return.
* @param payload The payload provided when specifying this callback.
* @return 0 for success or an error code for failure
*/
typedef int (*git_cred_acquire_cb)(
git_cred **cred,
const char *url,
unsigned int allowed_types,
void *payload);
/*
*** End interface for credentials acquisition ***
*** 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 {
unsigned int version;
/* 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,
git_cred_acquire_cb cred_acquire_cb,
void *cred_acquire_payload,
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);
/* Executes the push whose context is in the git_push object. */
int (*push)(struct git_transport *transport, git_push *push);
/* 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);
/* 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;
#define GIT_TRANSPORT_VERSION 1
#define GIT_TRANSPORT_INIT {GIT_TRANSPORT_VERSION}
/**
* 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 out The newly created transport (out)
* @param owner The git_remote which will own this transport
* @param url The URL to connect to
* @return 0 or an error code
*/
GIT_EXTERN(int) git_transport_new(git_transport **out, git_remote *owner, 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 **out, git_remote *owner, 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 out The newly created transport (out)
* @param owner The git_remote which will own this transport
* @param payload You must pass NULL for this parameter.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_transport_dummy(
git_transport **out,
git_remote *owner,
/* NULL */ void *payload);
/**
* Create an instance of the local transport.
*
* @param out The newly created transport (out)
* @param owner The git_remote which will own this transport
* @param payload You must pass NULL for this parameter.
* @return 0 or an error code
*/
GIT_EXTERN(int) git_transport_local(
git_transport **out,
git_remote *owner,
/* NULL */ void *payload);
/**
* Create an instance of the smart transport.
*
* @param out The newly created transport (out)
* @param owner The git_remote which will own this transport
* @param payload A pointer to a git_smart_subtransport_definition
* @return 0 or an error code
*/
GIT_EXTERN(int) git_transport_smart(
git_transport **out,
git_remote *owner,
/* (git_smart_subtransport_definition *) */ void *payload);
/*
*** 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_SERVICE_RECEIVEPACK_LS = 3,
GIT_SERVICE_RECEIVEPACK = 4,
} 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);
/* Subtransports are guaranteed a call to close() between
* calls to action(), except for the following two "natural" progressions
* of actions against a constant URL.
*
* 1. UPLOADPACK_LS -> UPLOADPACK
* 2. RECEIVEPACK_LS -> RECEIVEPACK */
int (* close)(struct git_smart_subtransport *transport);
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
