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Merge TCP aborted(), timedout() and closed() methods into a single

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closed() method with a reason code.
This commit is contained in:
Michael Brown
2006-04-30 16:59:45 +00:00
parent 8afb6303fb
commit 9e1becaf8a
6 changed files with 131 additions and 102 deletions
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6
src/include/gpxe/ftp.h
View File

@@ -10,6 +10,12 @@
#include <stdint.h>
#include <gpxe/tcp.h>
/**
* FTP states
*
* These @b must be sequential, i.e. a successful FTP session must
* pass through each of these states in order.
*/
enum ftp_state {
FTP_CONNECT = 0,
FTP_USER,

26
src/include/gpxe/tcp.h
View File

@@ -19,28 +19,24 @@ struct tcp_connection;
*
*/
struct tcp_operations {
/**
* Connection aborted (RST received)
/*
* Connection closed
*
* @v conn TCP connection
*/
void ( * aborted ) ( struct tcp_connection *conn );
/**
* Connection timed out
* @v status Error code, if any
*
* @v conn TCP connection
*/
void ( * timedout ) ( struct tcp_connection *conn );
/**
* Connection aborted (FIN received)
*
* @v conn TCP connection
* This is called when the connection is closed for any
* reason, including timeouts or aborts. The status code
* contains the negative error number, if the closure is due
* to an error.
*
* Note that acked() and newdata() may be called after
* closed(), if the packet containing the FIN also
* acknowledged data or contained new data.
* acknowledged data or contained new data. Note also that
* connected() may not have been called before closed(), if
* the close is due to an error.
*/
void ( * closed ) ( struct tcp_connection *conn );
void ( * closed ) ( struct tcp_connection *conn, int status );
/**
* Connection established (SYNACK received)
*

21
src/net/tcp.c
View File

@@ -2,6 +2,7 @@
#include <assert.h>
#include <byteswap.h>
#include <latch.h>
#include <errno.h>
#include <gpxe/process.h>
#include <gpxe/init.h>
#include <gpxe/netdevice.h>
@@ -131,18 +132,14 @@ void uip_tcp_appcall ( void ) {
struct tcp_connection *conn = *( ( void ** ) uip_conn->appstate );
struct tcp_operations *op = conn->tcp_op;
assert ( conn->tcp_op->closed != NULL );
assert ( conn->tcp_op->connected != NULL );
assert ( conn->tcp_op->acked != NULL );
assert ( conn->tcp_op->newdata != NULL );
assert ( conn->tcp_op->senddata != NULL );
if ( uip_aborted() && op->aborted )
op->aborted ( conn );
if ( uip_timedout() && op->timedout )
op->timedout ( conn );
if ( uip_closed() && op->closed )
op->closed ( conn );
if ( op->closed ) {
if ( uip_aborted() )
op->closed ( conn, -ECONNABORTED );
if ( uip_timedout() )
op->closed ( conn, -ETIMEDOUT );
if ( uip_closed() )
op->closed ( conn, 0 );
}
if ( uip_connected() && op->connected )
op->connected ( conn );
if ( uip_acked() && op->acked )

144
src/net/tcp/ftp.c
View File

@@ -12,6 +12,12 @@
*
*/
/*****************************************************************************
*
* FTP control channel
*
*/
/** An FTP control channel string */
struct ftp_string {
/** String format */
@@ -25,8 +31,18 @@ struct ftp_string {
off_t data_offset;
};
#define ftp_string_offset( fieldname ) \
offsetof ( struct ftp_request, fieldname )
/** FTP control channel strings */
static const struct ftp_string ftp_strings[] = {
[FTP_CONNECT] = { "", 0 },
[FTP_USER] = { "USER anonymous\r\n", 0 },
[FTP_PASS] = { "PASS etherboot@etherboot.org\r\n", 0 },
[FTP_TYPE] = { "TYPE I\r\n", 0 },
[FTP_PASV] = { "PASV\r\n", 0 },
[FTP_RETR] = { "RETR %s\r\n",
offsetof ( struct ftp_request, filename ) },
[FTP_QUIT] = { "QUIT\r\n", 0 },
[FTP_DONE] = { "", 0 },
};
/**
* Get data associated with an FTP control channel string
@@ -40,23 +56,23 @@ static inline const void * ftp_string_data ( struct ftp_request *ftp,
return * ( ( void ** ) ( ( ( void * ) ftp ) + data_offset ) );
}
/** FTP control channel strings */
const struct ftp_string ftp_strings[] = {
[FTP_CONNECT] = { "", 0 },
[FTP_USER] = { "USER anonymous\r\n", 0 },
[FTP_PASS] = { "PASS etherboot@etherboot.org\r\n", 0 },
[FTP_TYPE] = { "TYPE I\r\n", 0 },
[FTP_PASV] = { "PASV\r\n", 0 },
[FTP_RETR] = { "RETR %s\r\n", ftp_string_offset ( filename ) },
[FTP_QUIT] = { "QUIT\r\n", 0 },
[FTP_DONE] = { "", 0 },
};
static inline struct ftp_request *
tcp_to_ftp ( struct tcp_connection *conn ) {
/**
* Get FTP request from control TCP connection
*
* @v conn TCP connection
* @ret ftp FTP request
*/
static inline struct ftp_request * tcp_to_ftp ( struct tcp_connection *conn ) {
return container_of ( conn, struct ftp_request, tcp );
}
/**
* Mark FTP request as complete
*
* @v ftp FTP request
* @v complete Completion indicator
*
*/
static void ftp_complete ( struct ftp_request *ftp, int complete ) {
ftp->complete = complete;
tcp_close ( &ftp->tcp_data );
@@ -87,7 +103,7 @@ static void ftp_parse_value ( char **text, uint8_t *value, size_t len ) {
}
/**
* Handle a response from an FTP server
* Handle an FTP control channel response
*
* @v ftp FTP request
*
@@ -132,6 +148,16 @@ static void ftp_reply ( struct ftp_request *ftp ) {
ftp_complete ( ftp, -EPROTO );
}
/**
* Handle new data arriving on FTP control channel
*
* @v conn TCP connection
* @v data New data
* @v len Length of new data
*
* Data is collected until a complete line is received, at which point
* its information is passed to ftp_reply().
*/
static void ftp_newdata ( struct tcp_connection *conn,
void *data, size_t len ) {
struct ftp_request *ftp = tcp_to_ftp ( conn );
@@ -178,6 +204,11 @@ static void ftp_newdata ( struct tcp_connection *conn,
ftp->recvsize = recvsize;
}
/**
* Handle acknowledgement of data sent on FTP control channel
*
* @v conn TCP connection
*/
static void ftp_acked ( struct tcp_connection *conn, size_t len ) {
struct ftp_request *ftp = tcp_to_ftp ( conn );
@@ -185,6 +216,11 @@ static void ftp_acked ( struct tcp_connection *conn, size_t len ) {
ftp->already_sent += len;
}
/**
* Construct data to send on FTP control channel
*
* @v conn TCP connection
*/
static void ftp_senddata ( struct tcp_connection *conn ) {
struct ftp_request *ftp = tcp_to_ftp ( conn );
const struct ftp_string *string;
@@ -200,50 +236,72 @@ static void ftp_senddata ( struct tcp_connection *conn ) {
len - ftp->already_sent );
}
static void ftp_aborted ( struct tcp_connection *conn ) {
/**
* Handle control channel being closed
*
* @v conn TCP connection
*
* When the control channel is closed, the data channel must also be
* closed, if it is currently open.
*/
static void ftp_closed ( struct tcp_connection *conn, int status ) {
struct ftp_request *ftp = tcp_to_ftp ( conn );
ftp_complete ( ftp, -ECONNABORTED );
}
static void ftp_timedout ( struct tcp_connection *conn ) {
struct ftp_request *ftp = tcp_to_ftp ( conn );
ftp_complete ( ftp, -ETIMEDOUT );
}
static void ftp_closed ( struct tcp_connection *conn ) {
struct ftp_request *ftp = tcp_to_ftp ( conn );
ftp_complete ( ftp, 1 );
ftp_complete ( ftp, status ? status : 1 );
}
/** FTP control channel operations */
static struct tcp_operations ftp_tcp_operations = {
.aborted = ftp_aborted,
.timedout = ftp_timedout,
.closed = ftp_closed,
.acked = ftp_acked,
.newdata = ftp_newdata,
.senddata = ftp_senddata,
};
/*****************************************************************************
*
* FTP control channel
*
*/
/**
* Get FTP request from data TCP connection
*
* @v conn TCP connection
* @ret ftp FTP request
*/
static inline struct ftp_request *
tcp_to_ftp_data ( struct tcp_connection *conn ) {
return container_of ( conn, struct ftp_request, tcp_data );
}
static void ftp_data_aborted ( struct tcp_connection *conn ) {
/**
* Handle data channel being closed
*
* @v conn TCP connection
*
* When the data channel is closed, the control channel should be left
* alone; the server will send a completion message via the control
* channel which we'll pick up.
*
* If the data channel is closed due to an error, we abort the request.
*/
static void ftp_data_closed ( struct tcp_connection *conn, int status ) {
struct ftp_request *ftp = tcp_to_ftp_data ( conn );
ftp_complete ( ftp, -ECONNABORTED );
}
static void ftp_data_timedout ( struct tcp_connection *conn ) {
struct ftp_request *ftp = tcp_to_ftp_data ( conn );
ftp_complete ( ftp, -ETIMEDOUT );
if ( status )
ftp_complete ( ftp, status );
}
/**
* Handle new data arriving on the FTP data channel
*
* @v conn TCP connection
* @v data New data
* @v len Length of new data
*
* Data is handed off to the callback registered in the FTP request.
*/
static void ftp_data_newdata ( struct tcp_connection *conn,
void *data, size_t len ) {
struct ftp_request *ftp = tcp_to_ftp_data ( conn );
@@ -251,9 +309,9 @@ static void ftp_data_newdata ( struct tcp_connection *conn,
ftp->callback ( data, len );
}
/** FTP data channel operations */
static struct tcp_operations ftp_data_tcp_operations = {
.aborted = ftp_data_aborted,
.timedout = ftp_data_timedout,
.closed = ftp_data_closed,
.newdata = ftp_data_newdata,
};

22
src/net/tcp/hello.c
View File

@@ -13,7 +13,7 @@
* message (hello_request::message). Any data received from the
* server will be passed to the callback function,
* hello_request::callback(), and once the connection has been closed,
* hello_request::complete will be set to 1.
* hello_request::complete will be set to a non-zero value.
*
* To use this code, do something like:
*
@@ -49,24 +49,10 @@ tcp_to_hello ( struct tcp_connection *conn ) {
return container_of ( conn, struct hello_request, tcp );
}
static void hello_aborted ( struct tcp_connection *conn ) {
static void hello_closed ( struct tcp_connection *conn, int status ) {
struct hello_request *hello = tcp_to_hello ( conn );
printf ( "Connection aborted\n" );
hello->complete = 1;
}
static void hello_timedout ( struct tcp_connection *conn ) {
struct hello_request *hello = tcp_to_hello ( conn );
printf ( "Connection timed out\n" );
hello->complete = 1;
}
static void hello_closed ( struct tcp_connection *conn ) {
struct hello_request *hello = tcp_to_hello ( conn );
hello->complete = 1;
hello->complete = ( status ? status : 1 );
}
static void hello_connected ( struct tcp_connection *conn ) {
@@ -113,8 +99,6 @@ static void hello_senddata ( struct tcp_connection *conn ) {
}
static struct tcp_operations hello_tcp_operations = {
.aborted = hello_aborted,
.timedout = hello_timedout,
.closed = hello_closed,
.connected = hello_connected,
.acked = hello_acked,

14
src/proto/iscsi.c
View File

@@ -251,17 +251,7 @@ tcp_to_iscsi ( struct tcp_connection *conn ) {
return container_of ( conn, struct iscsi_session, tcp );
}
static void iscsi_aborted ( struct tcp_connection *conn ) {
struct iscsi_session *iscsi = tcp_to_iscsi ( conn );
}
static void iscsi_timedout ( struct tcp_connection *conn ) {
struct iscsi_session *iscsi = tcp_to_iscsi ( conn );
}
static void iscsi_closed ( struct tcp_connection *conn ) {
static void iscsi_closed ( struct tcp_connection *conn, int status ) {
struct iscsi_session *iscsi = tcp_to_iscsi ( conn );
}
@@ -523,8 +513,6 @@ static void iscsi_newdata ( struct tcp_connection *conn, void *data,
/** iSCSI TCP operations */
static struct tcp_operations iscsi_tcp_operations = {
.aborted = iscsi_aborted,
.timedout = iscsi_timedout,
.closed = iscsi_closed,
.connected = iscsi_connected,
.acked = iscsi_acked,