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- Markus Koetter provided a polished and updated version of Chad Monroe's TFTP 

rework patch that now integrates TFTP properly into libcurl so that it can
  be used non-blocking with the multi interface and more. BLKSIZE also works.

  The --tftp-blksize option was added to allow setting the TFTP BLKSIZE from
  the command line.
This commit is contained in:
Daniel Stenberg 2009-11-27 23:46:29 +00:00
Родитель a240f4d1df
Коммит 6e38cc9048
5 изменённых файлов: 509 добавлений и 235 удалений
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8
CHANGES
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@ -8,6 +8,14 @@
Daniel Stenberg (28 Nov 2009)
- Markus Koetter provided a polished and updated version of Chad Monroe's TFTP
rework patch that now integrates TFTP properly into libcurl so that it can
be used non-blocking with the multi interface and more. BLKSIZE also works.
The --tftp-blksize option was added to allow setting the TFTP BLKSIZE from
the command line.
Daniel Stenberg (26 Nov 2009)
- Extended and fixed the change I did on Dec 11 for the the progress
meter/callback during FTP command/response sequences. It turned out it was

5
RELEASE-NOTES
Просмотреть файл

@ -11,6 +11,7 @@ This release includes the following changes:
o support SSL_FILETYPE_ENGINE for client certificate
o curl-config can now show the arguments used when building curl
o non-blocking TFTP
This release includes the following bugfixes:
@ -26,6 +27,7 @@ This release includes the following bugfixes:
o HTTP proxy tunnel re-used connection even if tunnel got disabled
o SSL lib post-close write
o curl failed to report write errors for tiny failed downloads
o TFTP BLKSIZE
This release includes the following known bugs:
@ -36,6 +38,7 @@ advice from friends like these:
Yang Tse, Kamil Dudka, Christian Schmitz, Constantine Sapuntzakis,
Marco Maggi, Camille Moncelier, Claes Jakobsson, Kevin Baughman,
Marc Kleine-Budde, Jad Chamcham, Bjorn Augustsson, David Byron
Marc Kleine-Budde, Jad Chamcham, Bjorn Augustsson, David Byron,
Markus Koetter, Chad Monroe
Thanks! (and sorry if I forgot to mention someone)

673
lib/tftp.c
Просмотреть файл

@ -70,6 +70,7 @@
#include "connect.h"
#include "strerror.h"
#include "sockaddr.h" /* required for Curl_sockaddr_storage */
#include "multiif.h"
#include "url.h"
#include "rawstr.h"
@ -103,6 +104,7 @@ typedef enum {
} tftp_state_t;
typedef enum {
TFTP_EVENT_NONE = -1,
TFTP_EVENT_INIT = 0,
TFTP_EVENT_RRQ = 1,
TFTP_EVENT_WRQ = 2,
@ -137,20 +139,22 @@ typedef struct tftp_state_data {
tftp_state_t state;
tftp_mode_t mode;
tftp_error_t error;
tftp_event_t event;
struct connectdata *conn;
curl_socket_t sockfd;
int retries;
time_t retry_time;
time_t retry_max;
int retry_time;
int retry_max;
time_t start_time;
time_t max_time;
time_t rx_time;
unsigned short block;
struct Curl_sockaddr_storage local_addr;
struct Curl_sockaddr_storage remote_addr;
curl_socklen_t remote_addrlen;
ssize_t rbytes;
size_t sbytes;
size_t blksize;
socklen_t remote_addrlen;
int rbytes;
int sbytes;
int blksize;
int requested_blksize;
tftp_packet_t rpacket;
tftp_packet_t spacket;
@ -166,6 +170,11 @@ static CURLcode tftp_do(struct connectdata *conn, bool *done);
static CURLcode tftp_done(struct connectdata *conn,
CURLcode, bool premature);
static CURLcode tftp_setup_connection(struct connectdata * conn);
static CURLcode tftp_multi_statemach(struct connectdata *conn, bool *done);
static CURLcode tftp_doing(struct connectdata *conn, bool *dophase_done);
static int tftp_getsock(struct connectdata *conn, curl_socket_t *socks,
int numsocks);
CURLcode tftp_translate_code(tftp_error_t error);
/*
@ -179,17 +188,16 @@ const struct Curl_handler Curl_handler_tftp = {
tftp_done, /* done */
ZERO_NULL, /* do_more */
tftp_connect, /* connect_it */
ZERO_NULL, /* connecting */
ZERO_NULL, /* doing */
ZERO_NULL, /* proto_getsock */
ZERO_NULL, /* doing_getsock */
tftp_multi_statemach, /* connecting */
tftp_doing, /* doing */
tftp_getsock, /* proto_getsock */
tftp_getsock, /* doing_getsock */
ZERO_NULL, /* perform_getsock */
tftp_disconnect, /* disconnect */
PORT_TFTP, /* defport */
PROT_TFTP /* protocol */
};
/**********************************************************
*
* tftp_set_timeouts -
@ -226,14 +234,14 @@ static CURLcode tftp_set_timeouts(tftp_state_data_t *state)
timeout = maxtime ;
/* Average restart after 5 seconds */
state->retry_max = timeout/5;
state->retry_max = (int)timeout/5;
if(state->retry_max < 1)
/* avoid division by zero below */
state->retry_max = 1;
/* Compute the re-start interval to suit the timeout */
state->retry_time = timeout/state->retry_max;
state->retry_time = (int)timeout/state->retry_max;
if(state->retry_time<1)
state->retry_time=1;
@ -250,7 +258,7 @@ static CURLcode tftp_set_timeouts(tftp_state_data_t *state)
timeout = maxtime/10 ;
/* Average reposting an ACK after 15 seconds */
state->retry_max = timeout/15;
state->retry_max = (int)timeout/15;
}
/* But bound the total number */
if(state->retry_max<3)
@ -269,6 +277,9 @@ static CURLcode tftp_set_timeouts(tftp_state_data_t *state)
state->state, (state->max_time-state->start_time),
state->retry_time, state->retry_max);
/* init RX time */
time(&state->rx_time);
return CURLE_OK;
}
@ -352,9 +363,9 @@ static CURLcode tftp_parse_option_ack(tftp_state_data_t *state,
infof(data, "got option=(%s) value=(%s)\n", option, value);
if(checkprefix(option, TFTP_OPTION_BLKSIZE)) {
int blksize;
long blksize;
blksize = (int)strtol( value, NULL, 10 );
blksize = strtol( value, NULL, 10 );
if(!blksize) {
failf(data, "invalid blocksize value in OACK packet");
@ -379,7 +390,7 @@ static CURLcode tftp_parse_option_ack(tftp_state_data_t *state,
return CURLE_TFTP_ILLEGAL;
}
state->blksize = blksize;
state->blksize = (int)blksize;
infof(data, "%s (%d) %s (%d)\n", "blksize parsed from OACK",
state->blksize, "requested", state->requested_blksize);
}
@ -402,13 +413,14 @@ static CURLcode tftp_parse_option_ack(tftp_state_data_t *state,
static size_t tftp_option_add(tftp_state_data_t *state, size_t csize,
char *buf, const char *option)
{
if( ( strlen(option) + csize + 1U ) > state->blksize )
if( ( strlen(option) + csize + 1 ) > (size_t)state->blksize )
return 0;
strcpy(buf, option);
return( strlen(option) + 1 );
}
static CURLcode tftp_connect_for_tx(tftp_state_data_t *state, tftp_event_t event)
static CURLcode tftp_connect_for_tx(tftp_state_data_t *state,
tftp_event_t event)
{
CURLcode res;
#ifndef CURL_DISABLE_VERBOSE_STRINGS
@ -423,7 +435,8 @@ static CURLcode tftp_connect_for_tx(tftp_state_data_t *state, tftp_event_t event
return tftp_tx(state, event);
}
static CURLcode tftp_connect_for_rx(tftp_state_data_t *state, tftp_event_t event)
static CURLcode tftp_connect_for_rx(tftp_state_data_t *state,
tftp_event_t event)
{
CURLcode res;
#ifndef CURL_DISABLE_VERBOSE_STRINGS
@ -441,6 +454,7 @@ static CURLcode tftp_connect_for_rx(tftp_state_data_t *state, tftp_event_t event
static CURLcode tftp_send_first(tftp_state_data_t *state, tftp_event_t event)
{
size_t sbytes;
ssize_t senddata;
const char *mode = "octet";
char *filename;
char buf[64];
@ -506,18 +520,19 @@ static CURLcode tftp_send_first(tftp_state_data_t *state, tftp_event_t event)
TFTP_OPTION_BLKSIZE);
sbytes += tftp_option_add(state, sbytes,
(char *)state->spacket.data+sbytes, buf );
/* add timeout option */
snprintf( buf, sizeof(buf), "%d", state->retry_time );
/* add timeout option, this is the max time the session may live */
snprintf( buf, sizeof(buf), "%d", state->retry_time*state->retry_max );
sbytes += tftp_option_add(state, sbytes,
(char *)state->spacket.data+sbytes,
TFTP_OPTION_INTERVAL);
sbytes += tftp_option_add(state, sbytes,
(char *)state->spacket.data+sbytes, buf );
if (sendto(state->sockfd, (void *)state->spacket.data,
senddata = sendto(state->sockfd, (void *)state->spacket.data,
sbytes, 0,
state->conn->ip_addr->ai_addr,
state->conn->ip_addr->ai_addrlen) < 0) {
state->conn->ip_addr->ai_addrlen);
if(senddata != (ssize_t)sbytes) {
failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
}
Curl_safefree(filename);
@ -560,6 +575,7 @@ static CURLcode tftp_send_first(tftp_state_data_t *state, tftp_event_t event)
**********************************************************/
static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event)
{
ssize_t sbytes;
int rblock;
struct SessionHandle *data = state->conn->data;
@ -584,10 +600,11 @@ static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event)
state->retries = 0;
setpacketevent(&state->spacket, TFTP_EVENT_ACK);
setpacketblock(&state->spacket, state->block);
if(sendto(state->sockfd, (void *)state->spacket.data,
sbytes = sendto(state->sockfd, (void *)state->spacket.data,
4, SEND_4TH_ARG,
(struct sockaddr *)&state->remote_addr,
state->remote_addrlen) < 0) {
state->remote_addrlen);
if(sbytes < 0) {
failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
return CURLE_SEND_ERROR;
}
@ -599,6 +616,7 @@ static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event)
else {
state->state = TFTP_STATE_RX;
}
time(&state->rx_time);
break;
case TFTP_EVENT_OACK:
@ -607,16 +625,18 @@ static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event)
state->retries = 0;
setpacketevent(&state->spacket, TFTP_EVENT_ACK);
setpacketblock(&state->spacket, state->block);
if(sendto(state->sockfd, (void *)state->spacket.data,
sbytes = sendto(state->sockfd, (void *)state->spacket.data,
4, SEND_4TH_ARG,
(struct sockaddr *)&state->remote_addr,
state->remote_addrlen) < 0) {
state->remote_addrlen);
if(sbytes < 0) {
failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
return CURLE_SEND_ERROR;
}
/* we're ready to RX data */
state->state = TFTP_STATE_RX;
time(&state->rx_time);
break;
case TFTP_EVENT_TIMEOUT:
@ -629,11 +649,13 @@ static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event)
state->state = TFTP_STATE_FIN;
}
else {
/* Resend the previous ACK and check all sbytes were sent */
if(sendto(state->sockfd, (void *)state->spacket.data,
/* Resend the previous ACK */
sbytes = sendto(state->sockfd, (void *)state->spacket.data,
4, SEND_4TH_ARG,
(struct sockaddr *)&state->remote_addr,
state->remote_addrlen) < 0) {
state->remote_addrlen);
/* Check all sbytes were sent */
if(sbytes<0) {
failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
return CURLE_SEND_ERROR;
}
@ -641,6 +663,14 @@ static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event)
break;
case TFTP_EVENT_ERROR:
setpacketevent(&state->spacket, TFTP_EVENT_ERROR);
setpacketblock(&state->spacket, state->block);
sbytes = sendto(state->sockfd, (void *)state->spacket.data,
4, SEND_4TH_ARG,
(struct sockaddr *)&state->remote_addr,
state->remote_addrlen);
/* don't bother with the return code, but if the socket is still up we
* should be a good TFTP client and let the server know we're done */
state->state = TFTP_STATE_FIN;
break;
@ -662,8 +692,8 @@ static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event)
static CURLcode tftp_tx(tftp_state_data_t *state, tftp_event_t event)
{
struct SessionHandle *data = state->conn->data;
ssize_t sbytes;
int rblock;
int readcount;
CURLcode res = CURLE_OK;
struct SingleRequest *k = &data->req;
@ -685,38 +715,40 @@ static CURLcode tftp_tx(tftp_state_data_t *state, tftp_event_t event)
res = CURLE_SEND_ERROR;
}
else {
/* Re-send the data packet and check all sbytes were sent */
if(sendto(state->sockfd, (void *)&state->spacket,
/* Re-send the data packet */
sbytes = sendto(state->sockfd, (void *)&state->spacket,
4+state->sbytes, SEND_4TH_ARG,
(struct sockaddr *)&state->remote_addr,
state->remote_addrlen) < 0) {
state->remote_addrlen);
/* Check all sbytes were sent */
if(sbytes<0) {
failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
res = CURLE_SEND_ERROR;
}
}
return res;
}
/* fall-through */
case TFTP_EVENT_OACK:
/* This is the expected packet. Reset the counters and send the next
block */
time(&state->rx_time);
state->block++;
state->retries = 0;
setpacketevent(&state->spacket, TFTP_EVENT_DATA);
setpacketblock(&state->spacket, state->block);
if(state->block > 1 && state->sbytes < state->blksize) {
if(state->block > 1 && state->sbytes < (int)state->blksize) {
state->state = TFTP_STATE_FIN;
return CURLE_OK;
}
res = Curl_fillreadbuffer(state->conn, (int)state->blksize, &readcount);
state->sbytes = readcount;
res = Curl_fillreadbuffer(state->conn, (size_t)state->blksize,
&state->sbytes);
if(res)
return res;
/* Send the data packet and check all sbytes were sent */
if(sendto(state->sockfd, (void *)state->spacket.data,
sbytes = sendto(state->sockfd, (void *)state->spacket.data,
4+state->sbytes, SEND_4TH_ARG,
(struct sockaddr *)&state->remote_addr,
state->remote_addrlen) < 0) {
state->remote_addrlen);
/* Check all sbytes were sent */
if(sbytes<0) {
failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
return CURLE_SEND_ERROR;
}
@ -736,11 +768,13 @@ static CURLcode tftp_tx(tftp_state_data_t *state, tftp_event_t event)
state->state = TFTP_STATE_FIN;
}
else {
/* Re-send the data packet and check all sbytes were sent */
if(sendto(state->sockfd, (void *)state->spacket.data,
/* Re-send the data packet */
sbytes = sendto(state->sockfd, (void *)state->spacket.data,
4+state->sbytes, SEND_4TH_ARG,
(struct sockaddr *)&state->remote_addr,
state->remote_addrlen) < 0) {
state->remote_addrlen);
/* Check all sbytes were sent */
if(sbytes<0) {
failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
return CURLE_SEND_ERROR;
}
@ -751,6 +785,15 @@ static CURLcode tftp_tx(tftp_state_data_t *state, tftp_event_t event)
case TFTP_EVENT_ERROR:
state->state = TFTP_STATE_FIN;
setpacketevent(&state->spacket, TFTP_EVENT_ERROR);
setpacketblock(&state->spacket, state->block);
sbytes = sendto(state->sockfd, (void *)state->spacket.data,
4, SEND_4TH_ARG,
(struct sockaddr *)&state->remote_addr,
state->remote_addrlen);
/* don't bother with the return code, but if the socket is still up we
* should be a good TFTP client and let the server know we're done */
state->state = TFTP_STATE_FIN;
break;
default:
@ -761,6 +804,59 @@ static CURLcode tftp_tx(tftp_state_data_t *state, tftp_event_t event)
return res;
}
/**********************************************************
*
* tftp_translate_code
*
* Translate internal error codes to CURL error codes
*
**********************************************************/
CURLcode tftp_translate_code(tftp_error_t error)
{
CURLcode code = CURLE_OK;
if(error != TFTP_ERR_NONE) {
switch(error) {
case TFTP_ERR_NOTFOUND:
code = CURLE_TFTP_NOTFOUND;
break;
case TFTP_ERR_PERM:
code = CURLE_TFTP_PERM;
break;
case TFTP_ERR_DISKFULL:
code = CURLE_REMOTE_DISK_FULL;
break;
case TFTP_ERR_UNDEF:
case TFTP_ERR_ILLEGAL:
code = CURLE_TFTP_ILLEGAL;
break;
case TFTP_ERR_UNKNOWNID:
code = CURLE_TFTP_UNKNOWNID;
break;
case TFTP_ERR_EXISTS:
code = CURLE_REMOTE_FILE_EXISTS;
break;
case TFTP_ERR_NOSUCHUSER:
code = CURLE_TFTP_NOSUCHUSER;
break;
case TFTP_ERR_TIMEOUT:
code = CURLE_OPERATION_TIMEDOUT;
break;
case TFTP_ERR_NORESPONSE:
code = CURLE_COULDNT_CONNECT;
break;
default:
code= CURLE_ABORTED_BY_CALLBACK;
break;
}
}
else {
code = CURLE_OK;
}
return(code);
}
/**********************************************************
*
* tftp_state_machine
@ -883,11 +979,11 @@ static CURLcode tftp_connect(struct connectdata *conn, bool *done)
/* If not already bound, bind to any interface, random UDP port. If it is
* reused or a custom local port was desired, this has already been done!
*
* We once used the size of the local_addr struct as the third argument for
* bind() to better work with IPv6 or whatever size the struct could have,
* but we learned that at least Tru64, AIX and IRIX *requires* the size of
* that argument to match the exact size of a 'sockaddr_in' struct when
* running IPv4-only.
* We once used the size of the local_addr struct as the third argument
* for bind() to better work with IPv6 or whatever size the struct could
* have, but we learned that at least Tru64, AIX and IRIX *requires* the
* size of that argument to match the exact size of a 'sockaddr_in' struct
* when running IPv4-only.
*
* Therefore we use the size from the address we connected to, which we
* assume uses the same IP version and thus hopefully this works for both
@ -920,38 +1016,342 @@ static CURLcode tftp_connect(struct connectdata *conn, bool *done)
static CURLcode tftp_done(struct connectdata *conn, CURLcode status,
bool premature)
{
CURLcode code = CURLE_OK;
tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
(void)status; /* unused */
(void)premature; /* not used */
Curl_pgrsDone(conn);
return CURLE_OK;
/* If we have encountered an error */
code = tftp_translate_code(state->error);
return code;
}
/**********************************************************
*
* tftp_getsock
*
* The getsock callback
*
**********************************************************/
static int tftp_getsock(struct connectdata *conn, curl_socket_t *socks,
int numsocks)
{
if(!numsocks)
return GETSOCK_BLANK;
socks[0] = conn->sock[FIRSTSOCKET];
return GETSOCK_READSOCK(0);
}
/**********************************************************
*
* tftp_receive_packet
*
* Called once select fires and data is ready on the socket
*
**********************************************************/
static CURLcode tftp_receive_packet(struct connectdata *conn)
{
struct Curl_sockaddr_storage fromaddr;
socklen_t fromlen;
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
struct SingleRequest *k = &data->req;
/* Receive the packet */
fromlen = sizeof(fromaddr);
state->rbytes = (int)recvfrom(state->sockfd,
(void *)state->rpacket.data,
state->blksize+4,
0,
(struct sockaddr *)&fromaddr,
&fromlen);
if(state->remote_addrlen==0) {
memcpy(&state->remote_addr, &fromaddr, fromlen);
state->remote_addrlen = fromlen;
}
/* Sanity check packet length */
if(state->rbytes < 4) {
failf(data, "Received too short packet");
/* Not a timeout, but how best to handle it? */
state->event = TFTP_EVENT_TIMEOUT;
}
else {
/* The event is given by the TFTP packet time */
state->event = (tftp_event_t)getrpacketevent(&state->rpacket);
switch(state->event) {
case TFTP_EVENT_DATA:
/* Don't pass to the client empty or retransmitted packets */
if(state->rbytes > 4 &&
((state->block+1) == getrpacketblock(&state->rpacket))) {
result = Curl_client_write(conn, CLIENTWRITE_BODY,
(char *)state->rpacket.data+4,
state->rbytes-4);
if(result) {
tftp_state_machine(state, TFTP_EVENT_ERROR);
return result;
}
k->bytecount += state->rbytes-4;
Curl_pgrsSetDownloadCounter(data, (curl_off_t) k->bytecount);
}
break;
case TFTP_EVENT_ERROR:
state->error = (tftp_error_t)getrpacketblock(&state->rpacket);
infof(data, "%s\n", (const char *)state->rpacket.data+4);
break;
case TFTP_EVENT_ACK:
break;
case TFTP_EVENT_OACK:
result = tftp_parse_option_ack(state,
(const char *)state->rpacket.data+2,
state->rbytes-2);
if(result)
return result;
break;
case TFTP_EVENT_RRQ:
case TFTP_EVENT_WRQ:
default:
failf(data, "%s", "Internal error: Unexpected packet");
break;
}
/* Update the progress meter */
if(Curl_pgrsUpdate(conn)) {
tftp_state_machine(state, TFTP_EVENT_ERROR);
return CURLE_ABORTED_BY_CALLBACK;
}
}
return result;
}
/**********************************************************
*
* tftp_state_timeout
*
* Check if timeouts have been reached
*
**********************************************************/
static long tftp_state_timeout(struct connectdata *conn, tftp_event_t *event)
{
time_t current;
struct SessionHandle *data = conn->data;
tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
if (event)
*event = TFTP_EVENT_NONE;
time(&current);
if(current > state->max_time) {
DEBUGF(infof(data, "timeout: %d > %d\n",
current, state->max_time));
state->error = TFTP_ERR_TIMEOUT;
state->state = TFTP_STATE_FIN;
return(0);
}
else if (current > state->rx_time+state->retry_time) {
if (event)
*event = TFTP_EVENT_TIMEOUT;
time(&state->rx_time); /* update even though we received nothing */
return(state->max_time-current);
}
else {
return(state->max_time-current);
}
}
/**********************************************************
*
* tftp_easy_statemach
*
* Handle easy request until completion
*
**********************************************************/
static CURLcode tftp_easy_statemach(struct connectdata *conn)
{
int rc;
int check_time = 0;
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
/* Run the TFTP State Machine */
for(;
(state->state != TFTP_STATE_FIN) && (result == CURLE_OK);
result=tftp_state_machine(state, state->event) ) {
/* Wait until ready to read or timeout occurs */
rc=Curl_socket_ready(state->sockfd, CURL_SOCKET_BAD,
state->retry_time * 1000);
if(rc == -1) {
/* bail out */
int error = SOCKERRNO;
failf(data, "%s", Curl_strerror(conn, error));
state->event = TFTP_EVENT_ERROR;
}
else if(rc==0) {
/* A timeout occured */
state->event = TFTP_EVENT_TIMEOUT;
/* Force a look at transfer timeouts */
check_time = 0;
}
else {
result = tftp_receive_packet(conn);
}
/* Check for transfer timeout every 10 blocks, or after timeout */
if(check_time%10==0) {
/* ignore the event here as Curl_socket_ready() handles
* retransmission timeouts inside the easy state mach */
tftp_state_timeout(conn, NULL);
}
if(result)
return(result);
}
/* Tell curl we're done */
result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
return(result);
}
/**********************************************************
*
* tftp_multi_statemach
*
* Handle single RX socket event and return
*
**********************************************************/
static CURLcode tftp_multi_statemach(struct connectdata *conn, bool *done)
{
int rc;
tftp_event_t event;
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
long timeout_ms = tftp_state_timeout(conn, &event);
*done = FALSE;
if(timeout_ms <= 0) {
failf(data, "TFTP response timeout");
return CURLE_OPERATION_TIMEDOUT;
}
else if (event != TFTP_EVENT_NONE) {
result = tftp_state_machine(state, event);
if(result != CURLE_OK)
return(result);
*done = (bool)(state->state == TFTP_STATE_FIN);
if(*done)
/* Tell curl we're done */
result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
}
else {
/* no timeouts to handle, check our socket */
rc = Curl_socket_ready(state->sockfd, CURL_SOCKET_BAD, 0);
if(rc == -1) {
/* bail out */
int error = SOCKERRNO;
failf(data, "%s", Curl_strerror(conn, error));
state->event = TFTP_EVENT_ERROR;
}
else if(rc != 0) {
result = tftp_receive_packet(conn);
if(result != CURLE_OK)
return(result);
result = tftp_state_machine(state, state->event);
if(result != CURLE_OK)
return(result);
*done = (bool)(state->state == TFTP_STATE_FIN);
if(*done)
/* Tell curl we're done */
result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
}
/* if rc == 0, then select() timed out */
}
return result;
}
/**********************************************************
*
* tftp_doing
*
* Called from multi.c while DOing
*
**********************************************************/
static CURLcode tftp_doing(struct connectdata *conn, bool *dophase_done)
{
CURLcode result;
result = tftp_multi_statemach(conn, dophase_done);
if(*dophase_done) {
DEBUGF(infof(conn->data, "DO phase is complete\n"));
}
return result;
}
/**********************************************************
*
* tftp_peform
*
* Entry point for transfer from tftp_do, sarts state mach
*
**********************************************************/
static CURLcode tftp_perform(struct connectdata *conn, bool *dophase_done)
{
CURLcode result = CURLE_OK;
tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
*dophase_done = FALSE;
result = tftp_state_machine(state, TFTP_EVENT_INIT);
if(state->state == TFTP_STATE_FIN || result != CURLE_OK)
return(result);
if(conn->data->state.used_interface == Curl_if_multi)
tftp_multi_statemach(conn, dophase_done);
else {
result = tftp_easy_statemach(conn);
*dophase_done = TRUE; /* with the easy interface we are done here */
}
if(*dophase_done)
DEBUGF(infof(conn->data, "DO phase is complete\n"));
return result;
}
/**********************************************************
*
* tftp
* tftp_do
*
* The do callback
*
* This callback handles the entire TFTP transfer
* This callback initiates the TFTP transfer
*
**********************************************************/
static CURLcode tftp_do(struct connectdata *conn, bool *done)
{
struct SessionHandle *data = conn->data;
tftp_state_data_t *state;
tftp_event_t event;
CURLcode code;
int rc;
struct Curl_sockaddr_storage fromaddr;
curl_socklen_t fromlen;
int check_time = 0;
struct SingleRequest *k = &data->req;
*done = TRUE;
*done = FALSE;
/*
Since connections can be re-used between SessionHandles, this might be a
@ -968,156 +1368,11 @@ static CURLcode tftp_do(struct connectdata *conn, bool *done)
}
state = (tftp_state_data_t *)conn->proto.tftpc;
/* Run the TFTP State Machine */
for(code=tftp_state_machine(state, TFTP_EVENT_INIT);
(state->state != TFTP_STATE_FIN) && (code == CURLE_OK);
code=tftp_state_machine(state, event) ) {
/* Wait until ready to read or timeout occurs */
rc=Curl_socket_ready(state->sockfd, CURL_SOCKET_BAD,
(int)(state->retry_time * 1000));
if(rc == -1) {
/* bail out */
int error = SOCKERRNO;
failf(data, "%s", Curl_strerror(conn, error));
event = TFTP_EVENT_ERROR;
}
else if(rc==0) {
/* A timeout occured */
event = TFTP_EVENT_TIMEOUT;
/* Force a look at transfer timeouts */
check_time = 0;
}
else {
/* Receive the packet */
fromlen = sizeof(fromaddr);
state->rbytes = (ssize_t)recvfrom(state->sockfd,
(void *)state->rpacket.data,
state->blksize+4,
0,
(struct sockaddr *)&fromaddr,
&fromlen);
if(state->remote_addrlen==0) {
memcpy(&state->remote_addr, &fromaddr, fromlen);
state->remote_addrlen = fromlen;
}
/* Sanity check packet length */
if(state->rbytes < 4) {
failf(data, "Received too short packet");
/* Not a timeout, but how best to handle it? */
event = TFTP_EVENT_TIMEOUT;
}
else {
/* The event is given by the TFTP packet time */
event = (tftp_event_t)getrpacketevent(&state->rpacket);
switch(event) {
case TFTP_EVENT_DATA:
/* Don't pass to the client empty or retransmitted packets */
if(state->rbytes > 4 &&
((state->block+1) == getrpacketblock(&state->rpacket))) {
code = Curl_client_write(conn, CLIENTWRITE_BODY,
(char *)state->rpacket.data+4,
state->rbytes-4);
if(code)
return code;
k->bytecount += state->rbytes-4;
Curl_pgrsSetDownloadCounter(data, (curl_off_t) k->bytecount);
}
break;
case TFTP_EVENT_ERROR:
state->error = (tftp_error_t)getrpacketblock(&state->rpacket);
infof(data, "%s\n", (const char *)state->rpacket.data+4);
break;
case TFTP_EVENT_ACK:
break;
case TFTP_EVENT_OACK:
code = tftp_parse_option_ack(state,
(const char *)state->rpacket.data+2,
(int)state->rbytes-2);
if(code)
return code;
break;
case TFTP_EVENT_RRQ:
case TFTP_EVENT_WRQ:
default:
failf(data, "%s", "Internal error: Unexpected packet");
break;
}
/* Update the progress meter */
if(Curl_pgrsUpdate(conn))
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* Check for transfer timeout every 10 blocks, or after timeout */
if(check_time%10==0) {
time_t current;
time(&current);
if(current>state->max_time) {
DEBUGF(infof(data, "timeout: %d > %d\n",
current, state->max_time));
state->error = TFTP_ERR_TIMEOUT;
state->state = TFTP_STATE_FIN;
}
}
}
if(code)
return code;
/* Tell curl we're done */
code = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
if(code)
return code;
code = tftp_perform(conn, done);
/* If we have encountered an error */
if(state->error != TFTP_ERR_NONE) {
code = tftp_translate_code(state->error);
/* Translate internal error codes to curl error codes */
switch(state->error) {
case TFTP_ERR_NOTFOUND:
code = CURLE_TFTP_NOTFOUND;
break;
case TFTP_ERR_PERM:
code = CURLE_TFTP_PERM;
break;
case TFTP_ERR_DISKFULL:
code = CURLE_REMOTE_DISK_FULL;
break;
case TFTP_ERR_UNDEF:
case TFTP_ERR_ILLEGAL:
code = CURLE_TFTP_ILLEGAL;
break;
case TFTP_ERR_UNKNOWNID:
code = CURLE_TFTP_UNKNOWNID;
break;
case TFTP_ERR_EXISTS:
code = CURLE_REMOTE_FILE_EXISTS;
break;
case TFTP_ERR_NOSUCHUSER:
code = CURLE_TFTP_NOSUCHUSER;
break;
case TFTP_ERR_TIMEOUT:
code = CURLE_OPERATION_TIMEDOUT;
break;
case TFTP_ERR_NORESPONSE:
code = CURLE_COULDNT_CONNECT;
break;
default:
code= CURLE_ABORTED_BY_CALLBACK;
break;
}
}
else
code = CURLE_OK;
return code;
}

4
lib/urldata.h
Просмотреть файл

@ -932,8 +932,8 @@ struct connectdata {
#define PROT_SSL (1<<22) /* protocol requires SSL */
#define PROT_MISSING (1<<23)
#define PROT_CLOSEACTION PROT_FTP /* these ones need action before socket
close */
/* these ones need action before socket close */
#define PROT_CLOSEACTION (PROT_FTP | PROT_TFTP)
#define PROT_DUALCHANNEL PROT_FTP /* these protocols use two connections */
/* 'dns_entry' is the particular host we use. This points to an entry in the

12
src/main.c
Просмотреть файл

@ -602,7 +602,7 @@ struct Configurable {
char *ftp_account; /* for ACCT */
char *ftp_alternative_to_user; /* send command if USER/PASS fails */
int ftp_filemethod;
long tftp_blksize; /* TFTP BLKSIZE option */
bool ignorecl; /* --ignore-content-length */
bool disable_sessionid;
@ -877,6 +877,7 @@ static void help(void)
" --stderr <file> Where to redirect stderr. - means stdout",
" --tcp-nodelay Use the TCP_NODELAY option",
" -t/--telnet-option <OPT=val> Set telnet option",
" --tftp-blksize <value> Set TFTP BLKSIZE option (must be >512)",
" -z/--time-cond <time> Transfer based on a time condition",
" -1/--tlsv1 Use TLSv1 (SSL)",
" --trace <file> Write a debug trace to the given file",
@ -1732,12 +1733,13 @@ static ParameterError getparameter(char *flag, /* f or -long-flag */
{"$3", "keepalive-time", TRUE},
{"$4", "post302", FALSE},
{"$5", "noproxy", TRUE},
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
{"$6", "socks5-gssapi-service", TRUE},
{"$7", "socks5-gssapi-nec", FALSE},
#endif
{"$8", "proxy1.0", TRUE},
{"$9", "tftp-blksize", TRUE},
{"0", "http1.0", FALSE},
{"1", "tlsv1", FALSE},
{"2", "sslv2", FALSE},
@ -2264,6 +2266,9 @@ static ParameterError getparameter(char *flag, /* f or -long-flag */
GetStr(&config->proxy, nextarg);
config->proxyver = CURLPROXY_HTTP_1_0;
break;
case '9': /* --tftp-blksize */
str2num(&config->tftp_blksize, nextarg);
break;
}
break;
case '#': /* --progress-bar */
@ -5000,6 +5005,9 @@ operate(struct Configurable *config, int argc, argv_item_t argv[])
my_setopt(curl, CURLOPT_POSTREDIR, config->post301 |
(config->post302 ? CURL_REDIR_POST_302 : FALSE));
if(config->tftp_blksize)
my_setopt(curl, CURLOPT_TFTP_BLKSIZE, config->tftp_blksize);
retry_numretries = config->req_retry;
retrystart = cutil_tvnow();