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The protocol documentation states that the maximum length of a cancel key is 256 bytes. This starts checking for that limit in libpq. Otherwise third party backend implementations will probably start using more bytes anyway. We also start requiring that a protocol 3.0 connection does not send a longer cancel key, to make sure that servers don't start breaking old 3.0-only clients by accident. Finally this also restricts the minimum key length to 4 bytes (both in the protocol spec and in the libpq implementation). Author: Jelte Fennema-Nio <postgres@jeltef.nl> Reviewed-by: Jacob Champion <jchampion@postgresql.org> Discussion: https://www.postgresql.org/message-id/df892f9f-5923-4046-9d6f-8c48d8980b50@iki.fi Backpatch-through: 18 |
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| .. | ||
| po | ||
| t | ||
| test | ||
| .gitignore | ||
| exports.txt | ||
| fe-auth-oauth.c | ||
| fe-auth-oauth.h | ||
| fe-auth-sasl.h | ||
| fe-auth-scram.c | ||
| fe-auth.c | ||
| fe-auth.h | ||
| fe-cancel.c | ||
| fe-connect.c | ||
| fe-exec.c | ||
| fe-gssapi-common.c | ||
| fe-gssapi-common.h | ||
| fe-lobj.c | ||
| fe-misc.c | ||
| fe-print.c | ||
| fe-protocol3.c | ||
| fe-secure-common.c | ||
| fe-secure-common.h | ||
| fe-secure-gssapi.c | ||
| fe-secure-openssl.c | ||
| fe-secure.c | ||
| fe-trace.c | ||
| legacy-pqsignal.c | ||
| libpq-events.c | ||
| libpq-events.h | ||
| libpq-fe.h | ||
| libpq-int.h | ||
| Makefile | ||
| meson.build | ||
| nls.mk | ||
| pg_service.conf.sample | ||
| pqexpbuffer.c | ||
| pqexpbuffer.h | ||
| pthread-win32.c | ||
| README | ||
| win32.c | ||
| win32.h | ||
src/interfaces/libpq/README This directory contains the C version of Libpq, the POSTGRES frontend library.