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62476cc1bf
Can be used to query/modify socket state for unconnected UDP sendmsg. Those hooks run as BPF_CGROUP_RUN_SA_PROG_LOCK and operate on a locked socket. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210127232853.3753823-2-sdf@google.com
21 lines
457 B
C
21 lines
457 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <sys/socket.h>
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#include <bpf/bpf_helpers.h>
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int get_set_sk_priority(void *ctx)
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{
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int prio;
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/* Verify that context allows calling bpf_getsockopt and
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* bpf_setsockopt by reading and writing back socket
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* priority.
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*/
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if (bpf_getsockopt(ctx, SOL_SOCKET, SO_PRIORITY, &prio, sizeof(prio)))
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return 0;
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if (bpf_setsockopt(ctx, SOL_SOCKET, SO_PRIORITY, &prio, sizeof(prio)))
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return 0;
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return 1;
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}
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