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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2026 Isovalent */
#ifndef _KSOCK_COMMON_H
#define _KSOCK_COMMON_H
#include "errno.h"
#define SOCK_DGRAM 2
#define IPPROTO_UDP 17
struct bpf_ksock *bpf_ksock_create(const struct bpf_ksock_create_opts *opts,
u32 opts__sz, int *err__uninit) __ksym;
int bpf_ksock_connect(struct bpf_ksock *ks, const union bpf_ksock_addr *addr,
u32 addr__sz) __ksym;
struct bpf_ksock *bpf_ksock_acquire(struct bpf_ksock *ks) __ksym;
void bpf_ksock_release(struct bpf_ksock *ks) __ksym;
int bpf_ksock_send(struct bpf_ksock *ks, const void *data, u32 data__sz) __ksym;
void bpf_rcu_read_lock(void) __ksym;
void bpf_rcu_read_unlock(void) __ksym;
struct __ksock_ctx_value {
struct bpf_ksock __kptr * ctx;
};
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__type(key, int);
__type(value, struct __ksock_ctx_value);
__uint(max_entries, 1);
} __ksock_ctx_map SEC(".maps");
static inline struct __ksock_ctx_value *ksock_ctx_value_lookup(void)
{
u32 key = 0;
return bpf_map_lookup_elem(&__ksock_ctx_map, &key);
}
static inline struct bpf_ksock *ksock_ctx_get(void)
{
struct __ksock_ctx_value *v;
struct bpf_ksock *ks = NULL, *tmp;
v = ksock_ctx_value_lookup();
if (!v)
return NULL;
bpf_rcu_read_lock();
tmp = v->ctx;
if (tmp)
ks = bpf_ksock_acquire(tmp);
bpf_rcu_read_unlock();
return ks;
}
static inline int ksock_ctx_insert(struct bpf_ksock *ctx)
{
struct __ksock_ctx_value *v;
struct bpf_ksock *old;
v = ksock_ctx_value_lookup();
if (!v) {
bpf_ksock_release(ctx);
return -ENOENT;
}
old = bpf_kptr_xchg(&v->ctx, ctx);
if (old) {
bpf_ksock_release(old);
return -EEXIST;
}
return 0;
}
#endif /* _KSOCK_COMMON_H */
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