X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fubus.git;a=blobdiff_plain;f=ubusd.c;h=f1f8ac7f003024b0661d0651f7935212c32c265a;hp=798761dc7b51508463374ecd12f0b99dfbd41de8;hb=619f3a160de4f417226b69039538882787b3811c;hpb=d80ebf55afcde808265e4702c162d6b40d649260 diff --git a/ubusd.c b/ubusd.c index 798761d..f1f8ac7 100644 --- a/ubusd.c +++ b/ubusd.c @@ -1,5 +1,23 @@ +/* + * Copyright (C) 2011-2014 Felix Fietkau + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + #include +#include #include +#ifdef FreeBSD +#include +#endif +#include #include #include #include @@ -12,24 +30,10 @@ #include "ubusd.h" -static struct avl_tree clients; - -static struct ubus_msg_buf *ubus_msg_unshare(struct ubus_msg_buf *ub) -{ - ub = realloc(ub, sizeof(*ub) + ub->len); - if (!ub) - return NULL; - - ub->refcount = 1; - memcpy(ub + 1, ub->data, ub->len); - ub->data = (void *) (ub + 1); - return ub; -} - -struct ubus_msg_buf *ubus_msg_ref(struct ubus_msg_buf *ub) +static struct ubus_msg_buf *ubus_msg_ref(struct ubus_msg_buf *ub) { if (ub->refcount == ~0) - return ubus_msg_unshare(ub); + return ubus_msg_new(ub->data, ub->len, false); ub->refcount++; return ub; @@ -47,6 +51,8 @@ struct ubus_msg_buf *ubus_msg_new(void *data, int len, bool shared) if (!ub) return NULL; + ub->fd = -1; + if (shared) { ub->refcount = ~0; ub->data = data; @@ -66,6 +72,9 @@ void ubus_msg_free(struct ubus_msg_buf *ub) switch (ub->refcount) { case 1: case ~0: + if (ub->fd >= 0) + close(ub->fd); + free(ub); break; default: @@ -76,57 +85,107 @@ void ubus_msg_free(struct ubus_msg_buf *ub) static int ubus_msg_writev(int fd, struct ubus_msg_buf *ub, int offset) { - struct iovec iov[2]; + static struct iovec iov[2]; + static struct { + struct cmsghdr h; + int fd; + } fd_buf = { + .h = { + .cmsg_len = sizeof(fd_buf), + .cmsg_level = SOL_SOCKET, + .cmsg_type = SCM_RIGHTS, + }, + }; + struct msghdr msghdr = { + .msg_iov = iov, + .msg_iovlen = ARRAY_SIZE(iov), + .msg_control = &fd_buf, + .msg_controllen = sizeof(fd_buf), + }; + + fd_buf.fd = ub->fd; + if (ub->fd < 0) { + msghdr.msg_control = NULL; + msghdr.msg_controllen = 0; + } if (offset < sizeof(ub->hdr)) { iov[0].iov_base = ((char *) &ub->hdr) + offset; iov[0].iov_len = sizeof(ub->hdr) - offset; iov[1].iov_base = (char *) ub->data; iov[1].iov_len = ub->len; - return writev(fd, iov, 2); + + return sendmsg(fd, &msghdr, 0); } else { offset -= sizeof(ub->hdr); return write(fd, ((char *) ub->data) + offset, ub->len - offset); } } +static void ubus_msg_enqueue(struct ubus_client *cl, struct ubus_msg_buf *ub) +{ + if (cl->tx_queue[cl->txq_tail]) + return; + + cl->tx_queue[cl->txq_tail] = ubus_msg_ref(ub); + cl->txq_tail = (cl->txq_tail + 1) % ARRAY_SIZE(cl->tx_queue); +} + /* takes the msgbuf reference */ -void ubus_msg_send(struct ubus_client *cl, struct ubus_msg_buf *ub) +void ubus_msg_send(struct ubus_client *cl, struct ubus_msg_buf *ub, bool free) { int written; - if (cl->buf_head) - goto queue; + if (ub->hdr.type != UBUS_MSG_MONITOR) + ubusd_monitor_message(cl, ub, true); + + if (!cl->tx_queue[cl->txq_cur]) { + written = ubus_msg_writev(cl->sock.fd, ub, 0); + if (written >= ub->len + sizeof(ub->hdr)) + goto out; - written = ubus_msg_writev(cl->sock.fd, ub, 0); - if (written > 0 && written < ub->len + sizeof(ub->hdr)) { - cl->buf_head_ofs = written; + if (written < 0) + written = 0; + + cl->txq_ofs = written; /* get an event once we can write to the socket again */ uloop_fd_add(&cl->sock, ULOOP_READ | ULOOP_WRITE | ULOOP_EDGE_TRIGGER); - goto queue; } + ubus_msg_enqueue(cl, ub); - ubus_msg_free(ub); - return; +out: + if (free) + ubus_msg_free(ub); +} -queue: - ub = ubus_msg_unshare(ub); - ub->next = NULL; - *cl->buf_tail = ub; - cl->buf_tail = &ub->next; +static struct ubus_msg_buf *ubus_msg_head(struct ubus_client *cl) +{ + return cl->tx_queue[cl->txq_cur]; } -static void handle_client_disconnect(struct ubus_client *cl) +static void ubus_msg_dequeue(struct ubus_client *cl) { - struct ubus_object *obj; + struct ubus_msg_buf *ub = ubus_msg_head(cl); - while (!list_empty(&cl->objects)) { - obj = list_first_entry(&cl->objects, struct ubus_object, list); - ubusd_free_object(obj); - } + if (!ub) + return; + + ubus_msg_free(ub); + cl->txq_ofs = 0; + cl->tx_queue[cl->txq_cur] = NULL; + cl->txq_cur = (cl->txq_cur + 1) % ARRAY_SIZE(cl->tx_queue); +} - ubus_free_id(&clients, &cl->id); +static void handle_client_disconnect(struct ubus_client *cl) +{ + while (ubus_msg_head(cl)) + ubus_msg_dequeue(cl); + + ubusd_monitor_disconnect(cl); + ubusd_proto_free_client(cl); + if (cl->pending_msg_fd >= 0) + close(cl->pending_msg_fd); uloop_fd_delete(&cl->sock); close(cl->sock.fd); free(cl); @@ -136,13 +195,27 @@ static void client_cb(struct uloop_fd *sock, unsigned int events) { struct ubus_client *cl = container_of(sock, struct ubus_client, sock); struct ubus_msg_buf *ub; + static struct iovec iov; + static struct { + struct cmsghdr h; + int fd; + } fd_buf = { + .h = { + .cmsg_type = SCM_RIGHTS, + .cmsg_level = SOL_SOCKET, + .cmsg_len = sizeof(fd_buf), + } + }; + struct msghdr msghdr = { + .msg_iov = &iov, + .msg_iovlen = 1, + }; /* first try to tx more pending data */ - while (cl->buf_head) { - struct ubus_msg_buf *ub = cl->buf_head; + while ((ub = ubus_msg_head(cl))) { int written; - written = ubus_msg_writev(sock->fd, ub, cl->buf_head_ofs); + written = ubus_msg_writev(sock->fd, ub, cl->txq_ofs); if (written < 0) { switch(errno) { case EINTR: @@ -153,22 +226,17 @@ static void client_cb(struct uloop_fd *sock, unsigned int events) } break; } - if (written == 0) - break; - cl->buf_head_ofs += written; - if (cl->buf_head_ofs < ub->len + sizeof(ub->hdr)) + cl->txq_ofs += written; + if (cl->txq_ofs < ub->len + sizeof(ub->hdr)) break; - cl->buf_head_ofs = 0; - cl->buf_head = ub->next; - if (!cl->buf_head) - cl->buf_tail = &cl->buf_head; + ubus_msg_dequeue(cl); } /* prevent further ULOOP_WRITE events if we don't have data * to send anymore */ - if (!cl->buf_head && (events & ULOOP_WRITE)) + if (!ubus_msg_head(cl) && (events & ULOOP_WRITE)) uloop_fd_add(sock, ULOOP_READ | ULOOP_EDGE_TRIGGER); retry: @@ -176,15 +244,31 @@ retry: int offset = cl->pending_msg_offset; int bytes; - bytes = read(sock->fd, (char *)&cl->hdrbuf + offset, sizeof(cl->hdrbuf) - offset); + fd_buf.fd = -1; + + iov.iov_base = ((char *) &cl->hdrbuf) + offset; + iov.iov_len = sizeof(cl->hdrbuf) - offset; + + if (cl->pending_msg_fd < 0) { + msghdr.msg_control = &fd_buf; + msghdr.msg_controllen = sizeof(fd_buf); + } else { + msghdr.msg_control = NULL; + msghdr.msg_controllen = 0; + } + + bytes = recvmsg(sock->fd, &msghdr, 0); if (bytes < 0) goto out; + if (fd_buf.fd >= 0) + cl->pending_msg_fd = fd_buf.fd; + cl->pending_msg_offset += bytes; if (cl->pending_msg_offset < sizeof(cl->hdrbuf)) goto out; - if (blob_len(&cl->hdrbuf.data) + sizeof(cl->hdrbuf) > UBUS_MAX_MSGLEN) + if (blob_pad_len(&cl->hdrbuf.data) > UBUS_MAX_MSGLEN) goto disconnect; cl->pending_msg = ubus_msg_new(NULL, blob_raw_len(&cl->hdrbuf.data), false); @@ -213,31 +297,23 @@ retry: } /* accept message */ + ub->fd = cl->pending_msg_fd; + cl->pending_msg_fd = -1; cl->pending_msg_offset = 0; cl->pending_msg = NULL; - ubusd_receive_message(cl, ub); + ubusd_monitor_message(cl, ub, false); + ubusd_proto_receive_message(cl, ub); goto retry; } out: - if (!sock->eof || cl->buf_head) + if (!sock->eof || ubus_msg_head(cl)) return; disconnect: handle_client_disconnect(cl); } -struct ubus_client *ubusd_get_client_by_id(uint32_t id) -{ - struct ubus_id *clid; - - clid = ubus_find_id(&clients, id); - if (!clid) - return NULL; - - return container_of(clid, struct ubus_client, id); -} - static bool get_next_connection(int fd) { struct ubus_client *cl; @@ -254,26 +330,13 @@ static bool get_next_connection(int fd) } } - cl = calloc(1, sizeof(*cl)); - cl->sock.fd = client_fd; - - INIT_LIST_HEAD(&cl->objects); - if (!ubus_alloc_id(&clients, &cl->id, 0)) - goto error; - - cl->sock.cb = client_cb; - uloop_fd_add(&cl->sock, ULOOP_READ | ULOOP_EDGE_TRIGGER); - if (!ubusd_send_hello(cl)) - goto error_free; + cl = ubusd_proto_new_client(client_fd, client_cb); + if (cl) + uloop_fd_add(&cl->sock, ULOOP_READ | ULOOP_EDGE_TRIGGER); + else + close(client_fd); return true; - -error_free: - ubus_free_id(&clients, &cl->id); -error: - close(cl->sock.fd); - free(cl); - return true; } static void server_cb(struct uloop_fd *fd, unsigned int events) @@ -289,26 +352,59 @@ static struct uloop_fd server_fd = { .cb = server_cb, }; +static int usage(const char *progname) +{ + fprintf(stderr, "Usage: %s []\n" + "Options: \n" + " -A : Set the path to ACL files\n" + " -s : Set the unix domain socket to listen on\n" + "\n", progname); + return 1; +} + +static void sighup_handler(int sig) +{ + ubusd_acl_load(); +} + int main(int argc, char **argv) { + const char *ubus_socket = UBUS_UNIX_SOCKET; int ret = 0; + int ch; signal(SIGPIPE, SIG_IGN); + signal(SIGHUP, sighup_handler); - ubus_init_id_tree(&clients); - + openlog("ubusd", LOG_PID, LOG_DAEMON); uloop_init(); - unlink(UBUS_UNIX_SOCKET); - server_fd.fd = usock(USOCK_UNIX | USOCK_SERVER | USOCK_NONBLOCK, UBUS_UNIX_SOCKET, NULL); + while ((ch = getopt(argc, argv, "A:s:")) != -1) { + switch (ch) { + case 's': + ubus_socket = optarg; + break; + case 'A': + ubusd_acl_dir = optarg; + break; + default: + return usage(argv[0]); + } + } + + unlink(ubus_socket); + umask(0111); + server_fd.fd = usock(USOCK_UNIX | USOCK_SERVER | USOCK_NONBLOCK, ubus_socket, NULL); if (server_fd.fd < 0) { perror("usock"); ret = -1; goto out; } uloop_fd_add(&server_fd, ULOOP_READ | ULOOP_EDGE_TRIGGER); + ubusd_acl_load(); uloop_run(); + unlink(ubus_socket); out: uloop_done();