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author | Matthias Schiffer <mschiffer@universe-factory.net> | 2013-07-25 15:33:17 +0200 |
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committer | Matthias Schiffer <mschiffer@universe-factory.net> | 2013-07-25 15:33:17 +0200 |
commit | 5cda45defd17211375236c41d4d98dee1a534672 (patch) | |
tree | d9f0725a51f895bda400cab7b8fdecbe8c08434a /src/fastd.c | |
parent | 900ac61351cabc78b5126adbe9c9936d1c3b5ca6 (diff) | |
download | fastd-5cda45defd17211375236c41d4d98dee1a534672.tar fastd-5cda45defd17211375236c41d4d98dee1a534672.zip |
Move more code out of fastd.c
Diffstat (limited to 'src/fastd.c')
-rw-r--r-- | src/fastd.c | 169 |
1 files changed, 3 insertions, 166 deletions
diff --git a/src/fastd.c b/src/fastd.c index 9bd534d..37e841f 100644 --- a/src/fastd.c +++ b/src/fastd.c @@ -561,160 +561,6 @@ static void handle_tun(fastd_context_t *ctx) { fastd_send_all(ctx, NULL, buffer); } -static inline void handle_socket_control(fastd_context_t *ctx, struct msghdr *message, const fastd_socket_t *sock, fastd_peer_address_t *local_addr) { - memset(local_addr, 0, sizeof(fastd_peer_address_t)); - - const char *end = (char*)message->msg_control + message->msg_controllen; - - struct cmsghdr *cmsg; - for (cmsg = CMSG_FIRSTHDR(message); cmsg; cmsg = CMSG_NXTHDR(message, cmsg)) { - if ((char*)cmsg + sizeof(*cmsg) > end) - return; - - if (cmsg->cmsg_level == IPPROTO_IP && cmsg->cmsg_type == IP_PKTINFO) { - struct in_pktinfo *pktinfo = (struct in_pktinfo*)CMSG_DATA(cmsg); - if ((char*)pktinfo + sizeof(*pktinfo) > end) - return; - - local_addr->in.sin_family = AF_INET; - local_addr->in.sin_addr = pktinfo->ipi_addr; - local_addr->in.sin_port = fastd_peer_address_get_port(sock->bound_addr); - - return; - } - - if (cmsg->cmsg_level == IPPROTO_IPV6 && cmsg->cmsg_type == IPV6_PKTINFO) { - struct in6_pktinfo *pktinfo = (struct in6_pktinfo*)CMSG_DATA(cmsg); - if ((char*)pktinfo + sizeof(*pktinfo) > end) - return; - - local_addr->in6.sin6_family = AF_INET6; - local_addr->in6.sin6_addr = pktinfo->ipi6_addr; - local_addr->in6.sin6_port = fastd_peer_address_get_port(sock->bound_addr); - - if (IN6_IS_ADDR_LINKLOCAL(&local_addr->in6.sin6_addr)) - local_addr->in6.sin6_scope_id = pktinfo->ipi6_ifindex; - - return; - } - } -} - -static inline void handle_socket_receive_known(fastd_context_t *ctx, fastd_socket_t *sock, const fastd_peer_address_t *local_addr, const fastd_peer_address_t *remote_addr, fastd_peer_t *peer, fastd_buffer_t buffer) { - if (!fastd_peer_may_connect(ctx, peer)) { - fastd_buffer_free(buffer); - return; - } - - const uint8_t *packet_type = buffer.data; - fastd_buffer_push_head(ctx, &buffer, 1); - - switch (*packet_type) { - case PACKET_DATA: - if (!fastd_peer_is_established(peer) || !fastd_peer_address_equal(&peer->local_address, local_addr)) { - fastd_buffer_free(buffer); - ctx->conf->protocol->handshake_init(ctx, sock, local_addr, remote_addr, NULL); - return; - } - - ctx->conf->protocol->handle_recv(ctx, peer, buffer); - break; - - case PACKET_HANDSHAKE: - fastd_handshake_handle(ctx, sock, local_addr, remote_addr, peer, buffer); - } -} - -static inline bool is_unknown_peer_valid(fastd_context_t *ctx, const fastd_peer_address_t *remote_addr) { - return ctx->conf->has_floating || ctx->conf->on_verify; -} - -static inline void handle_socket_receive_unknown(fastd_context_t *ctx, fastd_socket_t *sock, const fastd_peer_address_t *local_addr, const fastd_peer_address_t *remote_addr, fastd_buffer_t buffer) { - const uint8_t *packet_type = buffer.data; - fastd_buffer_push_head(ctx, &buffer, 1); - - switch (*packet_type) { - case PACKET_DATA: - fastd_buffer_free(buffer); - ctx->conf->protocol->handshake_init(ctx, sock, local_addr, remote_addr, NULL); - break; - - case PACKET_HANDSHAKE: - fastd_handshake_handle(ctx, sock, local_addr, remote_addr, NULL, buffer); - } -} - -static inline void handle_socket_receive(fastd_context_t *ctx, fastd_socket_t *sock, const fastd_peer_address_t *local_addr, const fastd_peer_address_t *remote_addr, fastd_buffer_t buffer) { - fastd_peer_t *peer = NULL; - - if (sock->peer) { - if (!fastd_peer_address_equal(&sock->peer->address, remote_addr)) { - fastd_buffer_free(buffer); - return; - } - - peer = sock->peer; - } - else { - for (peer = ctx->peers; peer; peer = peer->next) { - if (fastd_peer_address_equal(&peer->address, remote_addr)) - break; - } - } - - if (peer) { - handle_socket_receive_known(ctx, sock, local_addr, remote_addr, peer, buffer); - } - else if(is_unknown_peer_valid(ctx, remote_addr)) { - handle_socket_receive_unknown(ctx, sock, local_addr, remote_addr, buffer); - } - else { - pr_debug(ctx, "received packet from unknown peer %I", remote_addr); - fastd_buffer_free(buffer); - } -} - -static void handle_socket(fastd_context_t *ctx, fastd_socket_t *sock) { - size_t max_len = PACKET_TYPE_LEN + ctx->conf->max_packet_size; - fastd_buffer_t buffer = fastd_buffer_alloc(ctx, max_len, ctx->conf->min_decrypt_head_space, ctx->conf->min_decrypt_tail_space); - fastd_peer_address_t local_addr; - fastd_peer_address_t recvaddr; - struct iovec buffer_vec = { .iov_base = buffer.data, .iov_len = buffer.len }; - char cbuf[1024]; - - struct msghdr message = { - .msg_name = &recvaddr, - .msg_namelen = sizeof(recvaddr), - .msg_iov = &buffer_vec, - .msg_iovlen = 1, - .msg_control = cbuf, - .msg_controllen = sizeof(cbuf), - }; - - ssize_t len = recvmsg(sock->fd, &message, 0); - if (len <= 0) { - if (len < 0 && errno != EINTR) - pr_warn_errno(ctx, "recvmsg"); - - fastd_buffer_free(buffer); - return; - } - - buffer.len = len; - - handle_socket_control(ctx, &message, sock, &local_addr); - - if (!local_addr.sa.sa_family) { - pr_error(ctx, "received packet without packet info"); - fastd_buffer_free(buffer); - return; - } - - fastd_peer_address_simplify(&recvaddr); - - handle_socket_receive(ctx, sock, &local_addr, &recvaddr, buffer); -} - static void handle_resolve_returns(fastd_context_t *ctx) { fastd_resolve_return_t resolve_return; @@ -745,15 +591,6 @@ static void handle_resolve_returns(fastd_context_t *ctx) { fastd_remote_unref(resolve_return.remote); } -static inline void handle_socket_error(fastd_context_t *ctx, fastd_socket_t *sock) { - if (sock->addr->bindtodev) - pr_warn(ctx, "socket bind %I on `%s' lost", &sock->addr->addr, sock->addr->bindtodev); - else - pr_warn(ctx, "socket bind %I lost", &sock->addr->addr); - - fastd_socket_close(ctx, sock); -} - static void handle_input(fastd_context_t *ctx) { const size_t n_fds = 2 + ctx->n_socks + ctx->n_peers; struct pollfd fds[n_fds]; @@ -805,16 +642,16 @@ static void handle_input(fastd_context_t *ctx) { for (i = 2; i < ctx->n_socks+2; i++) { if (fds[i].revents & (POLLERR|POLLHUP|POLLNVAL)) - handle_socket_error(ctx, &ctx->socks[i-2]); + fastd_socket_error(ctx, &ctx->socks[i-2]); else if (fds[i].revents & POLLIN) - handle_socket(ctx, &ctx->socks[i-2]); + fastd_receive(ctx, &ctx->socks[i-2]); } for (peer = ctx->peers; peer; peer = peer->next) { if (fds[i].revents & (POLLERR|POLLHUP|POLLNVAL)) fastd_peer_reset_socket(ctx, peer); else if (fds[i].revents & POLLIN) - handle_socket(ctx, peer->sock); + fastd_receive(ctx, peer->sock); i++; } |