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Files

Viktor Szakats 4ee56c613a src: return LIBSSH2_ERROR_BAD_USE when session == NULL

Replacing various stray error codes and/or calling `ssh2_err()` with
the NULL `session`, resulting in a NULL pointer dereference.

Also:
- return it from `libssh2_trace()` and `libssh2_trace_sethandler()`.

Ref: #2282

Closes #2283

2026-07-13 02:24:43 +02:00

1.2 KiB

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c, SPDX-License-Identifier, Title, Section, Source, See-also

c	SPDX-License-Identifier	Title	Section	Source	See-also
Copyright (C) The libssh2 project and its contributors.	BSD-3-Clause	libssh2_trace	3	libssh2

NAME

libssh2_trace - enable debug info from inside libssh2

SYNOPSIS

#include <libssh2.h>

int libssh2_trace(LIBSSH2_SESSION *session, int bitmask);

DESCRIPTION

This is a function present in the library that can be used to get debug info from within libssh2 when it is running. Helpful when trying to trace or debug behaviors. Note that this function has no effect unless libssh2 was built to support tracing! It is usually disabled in release builds.

bitmask can be set to the logical OR of none, one or more of these:

LIBSSH2_TRACE_SOCKET

Socket low-level debugging

LIBSSH2_TRACE_TRANS

Transport layer debugging

LIBSSH2_TRACE_KEX

Key exchange debugging

LIBSSH2_TRACE_AUTH

Authentication debugging

LIBSSH2_TRACE_CONN

Connection layer debugging

LIBSSH2_TRACE_SCP

SCP debugging

LIBSSH2_TRACE_SFTP

SFTP debugging

LIBSSH2_TRACE_ERROR

Error debugging

LIBSSH2_TRACE_PUBLICKEY

Public Key debugging

RETURN VALUE

0 on success, LIBSSH2_ERROR_BAD_USE if the session is invalid.

1.2 KiB Raw Blame History