mirror of
https://github.com/morgan9e/systemd
synced 2026-04-14 16:37:19 +09:00
cb42df5310
The previous commit removed the UINT_MAX check for the fd array. Let's now re-add one, but at a better place, and with a more useful limit. As it turns out the kernel does not allow passing more than 253 fds at the same time, hence use that as limit. And do so immediately before calculating the control buffer size, so that we catch multiplication overflows.
78 lines
1.3 KiB
C
78 lines
1.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <sys/socket.h>
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#ifndef AF_VSOCK
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#define AF_VSOCK 40
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#endif
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#ifndef SO_REUSEPORT
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#define SO_REUSEPORT 15
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#endif
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#ifndef SO_PEERGROUPS
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#define SO_PEERGROUPS 59
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#endif
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#ifndef SO_PASSPIDFD
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#define SO_PASSPIDFD 76
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#endif
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#ifndef SO_PEERPIDFD
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#define SO_PEERPIDFD 77
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#endif
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#ifndef SO_BINDTOIFINDEX
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#define SO_BINDTOIFINDEX 62
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#endif
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#ifndef SOL_NETLINK
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#define SOL_NETLINK 270
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#endif
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#ifndef SOL_ALG
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#define SOL_ALG 279
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#endif
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/* Not exposed yet. Defined in include/linux/socket.h. */
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#ifndef SOL_SCTP
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#define SOL_SCTP 132
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#endif
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#ifndef SCM_SECURITY
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#define SCM_SECURITY 0x03
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#endif
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#ifndef SCM_PIDFD
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#define SCM_PIDFD 0x04
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#endif
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/* netinet/in.h */
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#ifndef IP_FREEBIND
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#define IP_FREEBIND 15
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#endif
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#ifndef IP_TRANSPARENT
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#define IP_TRANSPARENT 19
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#endif
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#ifndef IPV6_FREEBIND
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#define IPV6_FREEBIND 78
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#endif
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#ifndef IP_RECVFRAGSIZE
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#define IP_RECVFRAGSIZE 25
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#endif
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#ifndef IPV6_RECVFRAGSIZE
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#define IPV6_RECVFRAGSIZE 77
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#endif
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/* The maximum number of fds that SCM_RIGHTS accepts. This is an internal kernel constant, but very much
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* useful for userspace too. It's documented in unix(7) these days, hence should be fairly reliable to define
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* here. */
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#ifndef SCM_MAX_FD
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#define SCM_MAX_FD 253U
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#endif
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