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[peerdist] Allow PeerDist to be globally enabled or disabled 

Allow the use of PeerDist content encoding to be enabled or disabled
via the ${peerdist} setting, e.g.:

  # Disable PeerDist
  set peerdist 0

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/99/head
Michael Brown 2019-12-13 14:44:22 +00:00
parent 3fe683ebab
commit 53af9905e0
1 changed files with 38 additions and 0 deletions
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38
src/net/peerdist.c
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@ -25,6 +25,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdio.h> #include <stdio.h>
#include <ipxe/http.h> #include <ipxe/http.h>
#include <ipxe/settings.h>
#include <ipxe/peermux.h> #include <ipxe/peermux.h>
/** @file /** @file
@ -35,6 +36,9 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
* misfortune to encounter, and I've encountered multicast TFTP. * misfortune to encounter, and I've encountered multicast TFTP.
*/ */
/** PeerDist is globally enabled */
static long peerdist_enabled = 1;
/** /**
* Check whether or not to support PeerDist encoding for this request * Check whether or not to support PeerDist encoding for this request
* *
@ -43,6 +47,10 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
*/ */
static int http_peerdist_supported ( struct http_transaction *http ) { static int http_peerdist_supported ( struct http_transaction *http ) {
/* Allow PeerDist to be globally enabled/disabled */
if ( ! peerdist_enabled )
return 0;
/* Support PeerDist encoding only if we can directly access an /* Support PeerDist encoding only if we can directly access an
* underlying data transfer buffer. Direct access is required * underlying data transfer buffer. Direct access is required
* in order to support decryption of data received via the * in order to support decryption of data received via the
@ -143,3 +151,33 @@ struct http_content_encoding peerdist_encoding __http_content_encoding = {
.supported = http_peerdist_supported, .supported = http_peerdist_supported,
.init = http_peerdist_init, .init = http_peerdist_init,
}; };
/** PeerDist enabled setting */
const struct setting peerdist_setting __setting ( SETTING_MISC, peerdist ) = {
.name = "peerdist",
.description = "PeerDist enabled",
.type = &setting_type_int8,
};
/**
* Apply PeerDist settings
*
* @ret rc Return status code
*/
static int apply_peerdist_settings ( void ) {
/* Fetch global PeerDist enabled setting */
if ( fetch_int_setting ( NULL, &peerdist_setting,
&peerdist_enabled ) < 0 ) {
peerdist_enabled = 1;
}
DBGC ( &peerdist_enabled, "PEERDIST is %s\n",
( peerdist_enabled ? "enabled" : "disabled" ) );
return 0;
}
/** PeerDist settings applicator */
struct settings_applicator peerdist_applicator __settings_applicator = {
.apply = apply_peerdist_settings,
};