Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
29 lines
519 B
C
29 lines
519 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <string.h>
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#include <linux/stddef.h>
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#include <linux/bpf.h>
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#include <sys/socket.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_endian.h>
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#define VERDICT_REJECT 0
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#define VERDICT_PROCEED 1
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int port;
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SEC("cgroup/connect4")
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int connect_v4_dropper(struct bpf_sock_addr *ctx)
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{
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if (ctx->type != SOCK_STREAM)
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return VERDICT_PROCEED;
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if (ctx->user_port == bpf_htons(port))
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return VERDICT_REJECT;
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return VERDICT_PROCEED;
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}
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char _license[] SEC("license") = "GPL";
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