135749060SStanislav Fomichev // SPDX-License-Identifier: GPL-2.0 235749060SStanislav Fomichev 335749060SStanislav Fomichev #include <linux/stddef.h> 435749060SStanislav Fomichev #include <linux/bpf.h> 535749060SStanislav Fomichev #include <linux/in6.h> 635749060SStanislav Fomichev #include <sys/socket.h> 735749060SStanislav Fomichev 835749060SStanislav Fomichev #include <bpf/bpf_helpers.h> 935749060SStanislav Fomichev #include <bpf/bpf_endian.h> 1035749060SStanislav Fomichev 11*4c3384d7SStanislav Fomichev #include <bpf_sockopt_helpers.h> 12*4c3384d7SStanislav Fomichev 1335749060SStanislav Fomichev #define SERV6_IP_0 0xfaceb00c /* face:b00c:1234:5678::abcd */ 1435749060SStanislav Fomichev #define SERV6_IP_1 0x12345678 1535749060SStanislav Fomichev #define SERV6_IP_2 0x00000000 1635749060SStanislav Fomichev #define SERV6_IP_3 0x0000abcd 1735749060SStanislav Fomichev #define SERV6_PORT 6060 1835749060SStanislav Fomichev 1935749060SStanislav Fomichev SEC("cgroup/recvmsg6") recvmsg6_prog(struct bpf_sock_addr * ctx)2035749060SStanislav Fomichevint recvmsg6_prog(struct bpf_sock_addr *ctx) 2135749060SStanislav Fomichev { 2235749060SStanislav Fomichev struct bpf_sock *sk; 2335749060SStanislav Fomichev 2435749060SStanislav Fomichev sk = ctx->sk; 2535749060SStanislav Fomichev if (!sk) 2635749060SStanislav Fomichev return 1; 2735749060SStanislav Fomichev 2835749060SStanislav Fomichev if (sk->family != AF_INET6) 2935749060SStanislav Fomichev return 1; 3035749060SStanislav Fomichev 3135749060SStanislav Fomichev if (ctx->type != SOCK_STREAM && ctx->type != SOCK_DGRAM) 3235749060SStanislav Fomichev return 1; 3335749060SStanislav Fomichev 34*4c3384d7SStanislav Fomichev if (!get_set_sk_priority(ctx)) 35*4c3384d7SStanislav Fomichev return 1; 36*4c3384d7SStanislav Fomichev 3735749060SStanislav Fomichev ctx->user_ip6[0] = bpf_htonl(SERV6_IP_0); 3835749060SStanislav Fomichev ctx->user_ip6[1] = bpf_htonl(SERV6_IP_1); 3935749060SStanislav Fomichev ctx->user_ip6[2] = bpf_htonl(SERV6_IP_2); 4035749060SStanislav Fomichev ctx->user_ip6[3] = bpf_htonl(SERV6_IP_3); 4135749060SStanislav Fomichev ctx->user_port = bpf_htons(SERV6_PORT); 4235749060SStanislav Fomichev 4335749060SStanislav Fomichev return 1; 4435749060SStanislav Fomichev } 4535749060SStanislav Fomichev 4635749060SStanislav Fomichev char _license[] SEC("license") = "GPL"; 47