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- Refactored a lot of timeout code into a few functions in an attempt to make

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them all use the same (hopefully correct) logic to make it less error-prone
  and easier to introduce library-wide where it should be used.
This commit is contained in:
Daniel Stenberg 2008-02-07 22:25:04 +00:00
parent 15bf168527
commit 1b701c746f
10 changed files with 123 additions and 181 deletions
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5
CHANGES
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@ -6,6 +6,11 @@
Changelog
Daniel S (7 Feb 2008)
- Refactored a lot of timeout code into a few functions in an attempt to make
them all use the same (hopefully correct) logic to make it less error-prone
and easier to introduce library-wide where it should be used.
Yang Tse (6 Feb 2008)
- Fix an issue in strdup replacement function when dealing with absolutely
huge strings. Only systems without a standard strdup would be affected.

3
RELEASE-NOTES
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@ -32,6 +32,7 @@ New curl mirrors:
This release would not have looked like this without help, code, reports and
advice from friends like these:
Michal Marek, Dmitry Kurochkin, Niklas Angebrand
Michal Marek, Dmitry Kurochkin, Niklas Angebrand, Günter Knauf, Yang Tse,
Dan Fandrich
Thanks! (and sorry if I forgot to mention someone)

138
lib/connect.c
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@ -101,6 +101,66 @@ singleipconnect(struct connectdata *conn,
long timeout_ms,
bool *connected);
/*
* Curl_timeleft() returns the amount of milliseconds left allowed for the
* transfer/connection. If the value is negative, the timeout time has already
* elapsed.
*
* If 'nowp' is non-NULL, it points to the current time.
* 'duringconnect' is FALSE if not during a connect, as then of course the
* connect timeout is not taken into account!
*/
long Curl_timeleft(struct connectdata *conn,
struct timeval *nowp,
bool duringconnect)
{
struct SessionHandle *data = conn->data;
int timeout_set = 0;
long timeout_ms = duringconnect?DEFAULT_CONNECT_TIMEOUT:0;
struct timeval now;
/* if a timeout is set, use the most restrictive one */
if(data->set.timeout > 0)
timeout_set |= 1;
if(duringconnect && (data->set.connecttimeout > 0))
timeout_set |= 2;
switch (timeout_set) {
case 1:
timeout_ms = data->set.timeout;
break;
case 2:
timeout_ms = data->set.connecttimeout;
break;
case 3:
if(data->set.timeout < data->set.connecttimeout)
timeout_ms = data->set.timeout;
else
timeout_ms = data->set.connecttimeout;
break;
default:
/* use the default */
if(!duringconnect)
/* if we're not during connect, there's no default timeout so if we're
at zero we better just return zero and not make it a negative number
by the math below */
return 0;
break;
}
if(!nowp) {
now = Curl_tvnow();
nowp = &now;
}
/* substract elapsed time */
timeout_ms -= Curl_tvdiff(*nowp, data->progress.t_startsingle);
return timeout_ms;
}
/*
* Curl_nonblock() set the given socket to either blocking or non-blocking
* mode based on the 'nonblock' boolean argument. This function is highly
@ -533,42 +593,33 @@ CURLcode Curl_is_connected(struct connectdata *conn,
CURLcode code = CURLE_OK;
curl_socket_t sockfd = conn->sock[sockindex];
long allow = DEFAULT_CONNECT_TIMEOUT;
long allow_total = 0;
long has_passed;
DEBUGASSERT(sockindex >= FIRSTSOCKET && sockindex <= SECONDARYSOCKET);
*connected = FALSE; /* a very negative world view is best */
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.t_startsingle);
/* subtract the most strict timeout of the ones */
if(data->set.timeout && data->set.connecttimeout) {
if(data->set.timeout < data->set.connecttimeout)
allow_total = allow = data->set.timeout;
else
allow = data->set.connecttimeout;
}
else if(data->set.timeout) {
allow_total = allow = data->set.timeout;
}
else if(data->set.connecttimeout) {
allow = data->set.connecttimeout;
}
if(has_passed > allow ) {
/* time-out, bail out, go home */
failf(data, "Connection time-out after %ld ms", has_passed);
return CURLE_OPERATION_TIMEDOUT;
}
if(conn->bits.tcpconnect) {
/* we are connected already! */
long allow_total = 0;
/* subtract the most strict timeout of the ones */
if(data->set.timeout)
allow_total = data->set.timeout;
Curl_expire(data, allow_total);
*connected = TRUE;
return CURLE_OK;
}
/* figure out how long time we have left to connect */
allow = Curl_timeleft(conn, NULL, TRUE);
if(allow < 0) {
/* time-out, bail out, go home */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
Curl_expire(data, allow);
/* check for connect without timeout as we want to return immediately */
@ -821,7 +872,6 @@ CURLcode Curl_connecthost(struct connectdata *conn, /* context */
int num_addr;
Curl_addrinfo *ai;
Curl_addrinfo *curr_addr;
int timeout_set = 0;
struct timeval after;
struct timeval before = Curl_tvnow();
@ -834,39 +884,13 @@ CURLcode Curl_connecthost(struct connectdata *conn, /* context */
*connected = FALSE; /* default to not connected */
/* if a timeout is set, use the most restrictive one */
/* get the timeout left */
timeout_ms = Curl_timeleft(conn, &before, TRUE);
if(data->set.timeout > 0)
timeout_set += 1;
if(data->set.connecttimeout > 0)
timeout_set += 2;
switch (timeout_set) {
case 1:
timeout_ms = data->set.timeout;
break;
case 2:
timeout_ms = data->set.connecttimeout;
break;
case 3:
if(data->set.timeout < data->set.connecttimeout)
timeout_ms = data->set.timeout;
else
timeout_ms = data->set.connecttimeout;
break;
default:
timeout_ms = DEFAULT_CONNECT_TIMEOUT;
break;
}
if(timeout_set > 0) {
/* if a timeout was already set, substract elapsed time */
timeout_ms -= Curl_tvdiff(before, data->progress.t_startsingle);
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
Curl_expire(data, timeout_ms);

14
lib/connect.h
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@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@ -31,14 +31,20 @@ CURLcode Curl_is_connected(struct connectdata *conn,
bool *connected);
CURLcode Curl_connecthost(struct connectdata *conn,
const struct Curl_dns_entry *host, /* connect to this */
const struct Curl_dns_entry *host, /* connect to
this */
curl_socket_t *sockconn, /* not set if error */
Curl_addrinfo **addr, /* the one we used */
bool *connected /* truly connected? */
);
bool *connected); /* truly connected? */
CURLcode Curl_store_ip_addr(struct connectdata *conn);
/* generic function that returns how much time there's left to run, according
to the timeouts set */
long Curl_timeleft(struct connectdata *conn,
struct timeval *nowp,
bool duringconnect);
#define DEFAULT_CONNECT_TIMEOUT 300000 /* milliseconds == five minutes */
#endif

39
lib/ftp.c
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@ -300,43 +300,14 @@ static bool isBadFtpString(const char *string)
*/
static CURLcode AllowServerConnect(struct connectdata *conn)
{
long timeout_ms;
struct SessionHandle *data = conn->data;
curl_socket_t sock = conn->sock[SECONDARYSOCKET];
int timeout_set = 0;
long timeout_ms = Curl_timeleft(conn, NULL, TRUE);
/* if a timeout is set, use the most restrictive one */
if(data->set.timeout > 0)
timeout_set += 1;
if(data->set.connecttimeout > 0)
timeout_set += 2;
switch (timeout_set) {
case 1:
timeout_ms = data->set.timeout;
break;
case 2:
timeout_ms = data->set.connecttimeout;
break;
case 3:
if(data->set.timeout < data->set.connecttimeout)
timeout_ms = data->set.timeout;
else
timeout_ms = data->set.connecttimeout;
break;
default:
timeout_ms = 60000; /* 60 seconds default timeout */
break;
}
if(timeout_set > 0) {
/* if a timeout was already set, substract elapsed time */
timeout_ms -= Curl_tvdiff(Curl_tvnow(), conn->now);
if(timeout_ms < 0) {
failf(data, "Timed out before server could connect to us");
return CURLE_OPERATION_TIMEDOUT;
}
if(timeout_ms < 0) {
/* if a timeout was already reached, bail out */
failf(data, "Timed out before server could connect to us");
return CURLE_OPERATION_TIMEDOUT;
}
switch (Curl_socket_ready(sock, CURL_SOCKET_BAD, (int)timeout_ms)) {

20
lib/gtls.c
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@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@ -154,23 +154,7 @@ static CURLcode handshake(struct connectdata *conn,
rc = gnutls_handshake(session);
if((rc == GNUTLS_E_AGAIN) || (rc == GNUTLS_E_INTERRUPTED)) {
long timeout_ms = DEFAULT_CONNECT_TIMEOUT;
long has_passed;
if(duringconnect && data->set.connecttimeout)
timeout_ms = data->set.connecttimeout;
if(data->set.timeout) {
/* get the strictest timeout of the ones converted to milliseconds */
if(data->set.timeout < timeout_ms)
timeout_ms = data->set.timeout;
}
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.t_startsingle);
/* subtract the passed time */
timeout_ms -= has_passed;
long timeout_ms = Curl_connecttimeleft(conn, NULL, duringconnect);
if(timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */

13
lib/qssl.c
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@ -172,17 +172,8 @@ static CURLcode Curl_qsossl_handshake(struct connectdata * conn, int sockindex)
if(!data->set.ssl.verifyhost)
h->exitPgm = Curl_qsossl_trap_cert;
if(data->set.connecttimeout) {
timeout_ms = data->set.connecttimeout;
if(data->set.timeout)
if(timeout_ms > data->set.timeout)
timeout_ms = data->set.timeout;
}
else if(data->set.timeout)
timeout_ms = data->set.timeout;
else
timeout_ms = DEFAULT_CONNECT_TIMEOUT;
/* figure out how long time we should wait at maximum */
timeout_ms = Curl_timeleft(conn, NULL, TRUE);
/* SSL_Handshake() timeout resolution is second, so round up. */

26
lib/socks.c
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@ -138,18 +138,7 @@ CURLcode Curl_SOCKS4(const char *proxy_name,
struct SessionHandle *data = conn->data;
/* get timeout */
if(data->set.timeout && data->set.connecttimeout) {
if(data->set.timeout < data->set.connecttimeout)
timeout = data->set.timeout;
else
timeout = data->set.connecttimeout;
}
else if(data->set.timeout)
timeout = data->set.timeout;
else if(data->set.connecttimeout)
timeout = data->set.connecttimeout;
else
timeout = DEFAULT_CONNECT_TIMEOUT;
timeout = Curl_timeleft(conn, NULL, TRUE);
Curl_nonblock(sock, FALSE);
@ -403,18 +392,7 @@ CURLcode Curl_SOCKS5(const char *proxy_name,
}
/* get timeout */
if(data->set.timeout && data->set.connecttimeout) {
if(data->set.timeout < data->set.connecttimeout)
timeout = data->set.timeout;
else
timeout = data->set.connecttimeout;
}
else if(data->set.timeout)
timeout = data->set.timeout;
else if(data->set.connecttimeout)
timeout = data->set.connecttimeout;
else
timeout = DEFAULT_CONNECT_TIMEOUT;
timeout = Curl_timeleft(conn, NULL, TRUE);
Curl_nonblock(sock, TRUE);

29
lib/ssluse.c
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@ -1448,40 +1448,17 @@ ossl_connect_step2(struct connectdata *conn,
{
struct SessionHandle *data = conn->data;
int err;
long has_passed;
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
DEBUGASSERT(ssl_connect_2 == connssl->connecting_state
|| ssl_connect_2_reading == connssl->connecting_state
|| ssl_connect_2_writing == connssl->connecting_state);
/* Find out if any timeout is set. If not, use 300 seconds.
Otherwise, figure out the most strict timeout of the two possible one
and then how much time that has elapsed to know how much time we
allow for the connect call */
if(data->set.timeout && data->set.connecttimeout) {
/* get the most strict timeout of the ones converted to milliseconds */
if(data->set.timeout<data->set.connecttimeout)
*timeout_ms = data->set.timeout;
else
*timeout_ms = data->set.connecttimeout;
}
else if(data->set.timeout)
*timeout_ms = data->set.timeout;
else if(data->set.connecttimeout)
*timeout_ms = data->set.connecttimeout;
else
/* no particular time-out has been set */
*timeout_ms = DEFAULT_CONNECT_TIMEOUT;
/* Evaluate in milliseconds how much time that has passed */
has_passed = Curl_tvdiff(Curl_tvnow(), data->progress.t_startsingle);
/* subtract the passed time */
*timeout_ms -= has_passed;
/* Find out how much more time we're allowed */
*timeout_ms = Curl_timeleft(conn, NULL, TRUE);
if(*timeout_ms < 0) {
/* a precaution, no need to continue if time already is up */
/* no need to continue if time already is up */
failf(data, "SSL connection timeout");
return CURLE_OPERATION_TIMEDOUT;
}

17
lib/tftp.c
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@ -114,7 +114,7 @@ typedef enum {
TFTP_ERR_ILLEGAL,
TFTP_ERR_UNKNOWNID,
TFTP_ERR_EXISTS,
TFTP_ERR_NOSUCHUSER, /* This will never be triggered by this code */
TFTP_ERR_NOSUCHUSER, /* This will never be triggered by this code */
/* The remaining error codes are internal to curl */
TFTP_ERR_NONE = -100,
@ -194,12 +194,14 @@ static void tftp_set_timeouts(tftp_state_data_t *state)
struct SessionHandle *data = state->conn->data;
time_t maxtime, timeout;
long timeout_ms;
time(&state->start_time);
if(state->state == TFTP_STATE_START) {
/* Compute drop-dead time */
maxtime = (time_t)(data->set.connecttimeout/1000L?
data->set.connecttimeout/1000L:30);
timeout_ms = Curl_timeleft(state->conn, NULL, TRUE);
maxtime = (time_t)(timeout_ms + 500) / 1000;
state->max_time = state->start_time+maxtime;
/* Set per-block timeout to total */
@ -219,10 +221,13 @@ static void tftp_set_timeouts(tftp_state_data_t *state)
}
else {
/* Compute drop-dead time */
maxtime = (time_t)(data->set.timeout/1000L?
data->set.timeout/1000L:3600);
timeout_ms = Curl_timeleft(state->conn, NULL, TRUE);
if(timeout_ms > 0)
maxtime = (time_t)(timeout_ms + 500) / 1000;
else
maxtime = 3600;
state->max_time = state->start_time+maxtime;
/* Set per-block timeout to 10% of total */