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prop289: Add two consensus parameters

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In order to be able to deploy the authenticated SENDMEs, these two consensus
parameters are needed to control the minimum version that we can emit and
accept.

See section 4 in prop289 for more details.

Note that at this commit, the functions that return the values aren't used so
compilation fails if warnings are set to errors.

Closes #26842

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2019-01-09 12:02:01 -05:00
parent 0e6e800c89
commit c38d46bf4a
1 changed files with 33 additions and 0 deletions
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33
src/core/or/sendme.c
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@ -15,6 +15,39 @@
#include "core/or/circuituse.h"
#include "core/or/relay.h"
#include "core/or/sendme.h"
#include "feature/nodelist/networkstatus.h"
/* The cell version constants for when emitting a cell. */
#define SENDME_EMIT_MIN_VERSION_DEFAULT 0
#define SENDME_EMIT_MIN_VERSION_MIN 0
#define SENDME_EMIT_MIN_VERSION_MAX UINT8_MAX
/* The cell version constants for when accepting a cell. */
#define SENDME_ACCEPT_MIN_VERSION_DEFAULT 0
#define SENDME_ACCEPT_MIN_VERSION_MIN 0
#define SENDME_ACCEPT_MIN_VERSION_MAX UINT8_MAX
/* Return the minimum version given by the consensus (if any) that should be
* used when emitting a SENDME cell. */
static int
get_emit_min_version(void)
{
return networkstatus_get_param(NULL, "sendme_emit_min_version",
SENDME_EMIT_MIN_VERSION_DEFAULT,
SENDME_EMIT_MIN_VERSION_MIN,
SENDME_EMIT_MIN_VERSION_MAX);
}
/* Return the minimum version given by the consensus (if any) that should be
* accepted when receiving a SENDME cell. */
static int
get_accept_min_version(void)
{
return networkstatus_get_param(NULL, "sendme_accept_min_version",
SENDME_ACCEPT_MIN_VERSION_DEFAULT,
SENDME_ACCEPT_MIN_VERSION_MIN,
SENDME_ACCEPT_MIN_VERSION_MAX);
}
/** Called when we've just received a relay data cell, when we've just
* finished flushing all bytes to stream <b>conn</b>, or when we've flushed