static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) { struct inet_sock *inet = inet_sk(sk); struct ipv6_pinfo *np = inet6_sk(sk); struct icmp6hdr user_icmph; int addr_type; struct in6_addr *daddr; int oif = 0; struct flowi6 fl6; int err; struct dst_entry *dst; struct rt6_info *rt; struct pingfakehdr pfh; struct sockcm_cookie junk = {0}; struct ipcm6_cookie ipc6; pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num); err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph, sizeof(user_icmph)); if (err) return err; if (msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name); if (msg->msg_namelen < sizeof(*u)) return -EINVAL; if (u->sin6_family != AF_INET6) { return -EAFNOSUPPORT; } daddr = &(u->sin6_addr); if (__ipv6_addr_needs_scope_id(ipv6_addr_type(daddr))) oif = u->sin6_scope_id; } else {
int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t len) { struct inet_sock *inet = inet_sk(sk); struct ipv6_pinfo *np = inet6_sk(sk); struct icmp6hdr user_icmph; int addr_type; struct in6_addr *daddr; int iif = 0; struct flowi6 fl6; int err; int hlimit; struct dst_entry *dst; struct rt6_info *rt; struct pingfakehdr pfh; pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num); err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph, sizeof(user_icmph)); if (err) return err; if (msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name); if (msg->msg_namelen < sizeof(*u)) return -EINVAL; if (u->sin6_family != AF_INET6) { return -EAFNOSUPPORT; } if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != u->sin6_scope_id) { return -EINVAL; } daddr = &(u->sin6_addr); iif = u->sin6_scope_id; } else {
int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t len) { struct inet_sock *inet = inet_sk(sk); struct ipv6_pinfo *np = inet6_sk(sk); struct icmp6hdr user_icmph; int addr_type; struct in6_addr *daddr; int iif = 0; struct flowi6 fl6; int err; int hlimit; struct dst_entry *dst; struct rt6_info *rt; struct pingfakehdr pfh; pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num); err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph, sizeof(user_icmph)); if (err) return err; if (msg->msg_name) { struct sockaddr_in6 *u = (struct sockaddr_in6 *) msg->msg_name; if (msg->msg_namelen < sizeof(struct sockaddr_in6) || u->sin6_family != AF_INET6) { return -EINVAL; } if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != u->sin6_scope_id) { return -EINVAL; } daddr = &(u->sin6_addr); iif = u->sin6_scope_id; } else { if (sk->sk_state != TCP_ESTABLISHED) return -EDESTADDRREQ; daddr = &np->daddr; } if (!iif) iif = sk->sk_bound_dev_if; addr_type = ipv6_addr_type(daddr); if (__ipv6_addr_needs_scope_id(addr_type) && !iif) return -EINVAL; if (addr_type & IPV6_ADDR_MAPPED) return -EINVAL; /* TODO: use ip6_datagram_send_ctl to get options from cmsg */ memset(&fl6, 0, sizeof(fl6)); fl6.flowi6_proto = IPPROTO_ICMPV6; fl6.saddr = np->saddr; fl6.daddr = *daddr; fl6.flowi6_mark = sk->sk_mark; fl6.fl6_icmp_type = user_icmph.icmp6_type; fl6.fl6_icmp_code = user_icmph.icmp6_code; fl6.flowi6_uid = sock_i_uid(sk); security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) fl6.flowi6_oif = np->mcast_oif; else if (!fl6.flowi6_oif) fl6.flowi6_oif = np->ucast_oif; dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr, 1); if (IS_ERR(dst)) return PTR_ERR(dst); rt = (struct rt6_info *) dst; np = inet6_sk(sk); if (!np) return -EBADF; if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) fl6.flowi6_oif = np->mcast_oif; else if (!fl6.flowi6_oif) fl6.flowi6_oif = np->ucast_oif; pfh.icmph.type = user_icmph.icmp6_type; pfh.icmph.code = user_icmph.icmp6_code; pfh.icmph.checksum = 0; pfh.icmph.un.echo.id = inet->inet_sport; pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence; pfh.iov = msg->msg_iov; pfh.wcheck = 0; pfh.family = AF_INET6; if (ipv6_addr_is_multicast(&fl6.daddr)) hlimit = np->mcast_hops; else hlimit = np->hop_limit; if (hlimit < 0) hlimit = ip6_dst_hoplimit(dst); lock_sock(sk); err = ip6_append_data(sk, ping_getfrag, &pfh, len, 0, hlimit, np->tclass, NULL, &fl6, rt, MSG_DONTWAIT, np->dontfrag); if (err) { ICMP6_INC_STATS_BH(sock_net(sk), rt->rt6i_idev, ICMP6_MIB_OUTERRORS); ip6_flush_pending_frames(sk); } else { err = icmpv6_push_pending_frames(sk, &fl6, (struct icmp6hdr *) &pfh.icmph, len); } release_sock(sk); if (err) return err; return len; }