bpf/progs/sockopt_sk.c

30 int _getsockopt(struct bpf_sockopt *ctx)
32 	__u8 *optval_end = ctx->optval_end;
33 	__u8 *optval = ctx->optval;
38 	sk = ctx->sk;
47 	if (bpf_get_netns_cookie(ctx) == 0)
50 	if (ctx->level == SOL_IP && ctx->optname == IP_TOS) {
58 	if (ctx->level == SOL_SOCKET && ctx->optname == SO_SNDBUF) {
66 	if (ctx->level == SOL_TCP && ctx->optname == TCP_CONGESTION) {
74 	if (ctx->level == SOL_TCP && ctx->optname == TCP_ZEROCOPY_RECEIVE) {
90 	if (ctx->level == SOL_IP && ctx->optname == IP_FREEBIND) {
94 		ctx->retval = 0; /* Reset system call return value to zero */
98 		ctx->optlen = 1;
110 	if (ctx->level != SOL_CUSTOM)
116 	storage = bpf_sk_storage_get(&socket_storage_map, ctx->sk, 0,
121 	if (!ctx->retval)
125 	ctx->retval = 0; /* Reset system call return value to zero */
128 	ctx->optlen = 1;
134 	if (ctx->optlen > page_size)
135 		ctx->optlen = 0;
140 int _setsockopt(struct bpf_sockopt *ctx)
142 	__u8 *optval_end = ctx->optval_end;
143 	__u8 *optval = ctx->optval;
148 	sk = ctx->sk;
157 	if (bpf_get_netns_cookie(ctx) == 0)
160 	if (ctx->level == SOL_IP && ctx->optname == IP_TOS) {
165 		ctx->optlen = 0; /* bypass optval>PAGE_SIZE */
169 	if (ctx->level == SOL_SOCKET && ctx->optname == SO_SNDBUF) {
176 		ctx->optlen = 4;
181 	if (ctx->level == SOL_TCP && ctx->optname == TCP_CONGESTION) {
188 		ctx->optlen = 5;
193 	if (ctx->level == SOL_IP && ctx->optname == IP_FREEBIND) {
195 		if (ctx->optlen != page_size * 2)
203 		ctx->optlen = 1;
215 	if (ctx->level != SOL_CUSTOM)
221 	storage = bpf_sk_storage_get(&socket_storage_map, ctx->sk, 0,
227 	ctx->optlen = -1; /* BPF has consumed this option, don't call kernel
235 	if (ctx->optlen > page_size)
236 		ctx->optlen = 0;