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imap: make imap_send use dynbuf for the send buffer management

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Reuses the buffer and thereby reduces number of mallocs over a transfer.

Closes #6010
This commit is contained in:
Daniel Stenberg 2020-09-24 23:04:15 +02:00
parent 92a9b88ebf
commit c4693adc62
No known key found for this signature in database
GPG Key ID: 5CC908FDB71E12C2
4 changed files with 19 additions and 20 deletions
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1
lib/dynbuf.h
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@ -84,4 +84,5 @@ int Curl_dyn_vprintf(struct dynbuf *dyn, const char *format, va_list ap_save);
#define DYN_QLOG_NAME 1024
#define DYN_H1_TRAILER 4096
#define DYN_PINGPPONG_CMD (64*1024)
#define DYN_IMAP_CMD (64*1024)
#endif

27
lib/imap.c
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@ -1429,6 +1429,7 @@ static CURLcode imap_connect(struct connectdata *conn, bool *done)
imapc->preftype = IMAP_TYPE_ANY;
Curl_sasl_init(&imapc->sasl, &saslimap);
Curl_dyn_init(&imapc->dyn, DYN_IMAP_CMD);
/* Initialise the pingpong layer */
Curl_pp_setup(pp);
Curl_pp_init(pp);
@ -1632,6 +1633,7 @@ static CURLcode imap_disconnect(struct connectdata *conn, bool dead_connection)
/* Disconnect from the server */
Curl_pp_disconnect(&imapc->pp);
Curl_dyn_free(&imapc->dyn);
/* Cleanup the SASL module */
Curl_sasl_cleanup(conn, imapc->sasl.authused);
@ -1733,30 +1735,25 @@ static CURLcode imap_sendf(struct connectdata *conn, const char *fmt, ...)
{
CURLcode result = CURLE_OK;
struct imap_conn *imapc = &conn->proto.imapc;
char *taggedfmt;
va_list ap;
DEBUGASSERT(fmt);
/* Calculate the next command ID wrapping at 3 digits */
imapc->cmdid = (imapc->cmdid + 1) % 1000;
/* Calculate the tag based on the connection ID and command ID */
msnprintf(imapc->resptag, sizeof(imapc->resptag), "%c%03d",
'A' + curlx_sltosi(conn->connection_id % 26), imapc->cmdid);
'A' + curlx_sltosi(conn->connection_id % 26),
(++imapc->cmdid)%1000);
/* Prefix the format with the tag */
taggedfmt = aprintf("%s %s", imapc->resptag, fmt);
if(!taggedfmt)
return CURLE_OUT_OF_MEMORY;
/* start with a blank buffer */
Curl_dyn_reset(&imapc->dyn);
/* Send the data with the tag */
/* append tag + space + fmt */
result = Curl_dyn_addf(&imapc->dyn, "%s %s", imapc->resptag, fmt);
if(!result) {
va_list ap;
va_start(ap, fmt);
result = Curl_pp_vsendf(&imapc->pp, taggedfmt, ap);
result = Curl_pp_vsendf(&imapc->pp, Curl_dyn_ptr(&imapc->dyn), ap);
va_end(ap);
free(taggedfmt);
}
return result;
}

5
lib/imap.h
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@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2009 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 2009 - 2020, 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
@ -75,13 +75,14 @@ struct imap_conn {
bool preauth; /* Is this connection PREAUTH? */
struct SASL sasl; /* SASL-related parameters */
unsigned int preftype; /* Preferred authentication type */
int cmdid; /* Last used command ID */
unsigned int cmdid; /* Last used command ID */
char resptag[5]; /* Response tag to wait for */
bool tls_supported; /* StartTLS capability supported by server */
bool login_disabled; /* LOGIN command disabled by server */
bool ir_supported; /* Initial response supported by server */
char *mailbox; /* The last selected mailbox */
char *mailbox_uidvalidity; /* UIDVALIDITY parsed from select response */
struct dynbuf dyn; /* for the IMAP commands */
};
extern const struct Curl_handler Curl_handler_imap;

2
tests/runtests.pl
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@ -166,7 +166,7 @@ my $SSHSRVMD5 = "[uninitialized]"; # MD5 of ssh server public key
my $srcdir = $ENV{'srcdir'} || '.';
my $CURL="../src/curl".exe_ext('TOOL'); # what curl executable to run on the tests
my $VCURL=$CURL; # what curl binary to use to verify the servers with
my $VCURL="curl"; # what curl binary to use to verify the servers with
# VCURL is handy to set to the system one when the one you
# just built hangs or crashes and thus prevent verification
my $DBGCURL=$CURL; #"../src/.libs/curl"; # alternative for debugging