static struct interface_proto_state *
static_attach(const struct proto_handler *h, struct interface *iface,
struct blob_attr *attr)
{
struct static_proto_state *state;
state = calloc(1, sizeof(*state));
if (!state)
return NULL;
state->config = malloc(blob_pad_len(attr));
if (!state->config)
goto error;
memcpy(state->config, attr, blob_pad_len(attr));
state->proto.free = static_free;
state->proto.cb = static_handler;
return &state->proto;
error:
free(state);
return NULL;
}
int __hidden ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
struct blob_attr *msg, int cmd, uint32_t peer)
{
memset(req, 0, sizeof(*req));
if (msg && blob_pad_len(msg) > UBUS_MAX_MSGLEN)
return -1;
INIT_LIST_HEAD(&req->list);
INIT_LIST_HEAD(&req->pending);
req->ctx = ctx;
req->peer = peer;
req->seq = ++ctx->request_seq;
return ubus_send_msg(ctx, req->seq, msg, cmd, peer);
}
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 ((ub = ubus_msg_head(cl))) {
int written;
written = ubus_msg_writev(sock->fd, ub, cl->txq_ofs);
if (written < 0) {
switch(errno) {
case EINTR:
case EAGAIN:
break;
default:
goto disconnect;
}
break;
}
cl->txq_ofs += written;
if (cl->txq_ofs < ub->len + sizeof(ub->hdr))
break;
ubus_msg_dequeue(cl);
}
/* prevent further ULOOP_WRITE events if we don't have data
* to send anymore */
if (!ubus_msg_head(cl) && (events & ULOOP_WRITE))
uloop_fd_add(sock, ULOOP_READ | ULOOP_EDGE_TRIGGER);
retry:
if (!sock->eof && cl->pending_msg_offset < sizeof(cl->hdrbuf)) {
int offset = cl->pending_msg_offset;
int bytes;
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_pad_len(&cl->hdrbuf.data) > UBUS_MAX_MSGLEN)
goto disconnect;
cl->pending_msg = ubus_msg_new(NULL, blob_raw_len(&cl->hdrbuf.data), false);
if (!cl->pending_msg)
goto disconnect;
memcpy(&cl->pending_msg->hdr, &cl->hdrbuf.hdr, sizeof(cl->hdrbuf.hdr));
memcpy(cl->pending_msg->data, &cl->hdrbuf.data, sizeof(cl->hdrbuf.data));
}
ub = cl->pending_msg;
if (ub) {
int offset = cl->pending_msg_offset - sizeof(ub->hdr);
int len = blob_raw_len(ub->data) - offset;
int bytes = 0;
if (len > 0) {
bytes = read(sock->fd, (char *) ub->data + offset, len);
if (bytes <= 0)
goto out;
}
if (bytes < len) {
cl->pending_msg_offset += bytes;
goto out;
}
/* accept message */
ub->fd = cl->pending_msg_fd;
cl->pending_msg_fd = -1;
cl->pending_msg_offset = 0;
cl->pending_msg = NULL;
ubusd_proto_receive_message(cl, ub);
goto retry;
}
out:
if (!sock->eof || ubus_msg_head(cl))
return;
disconnect:
handle_client_disconnect(cl);
}
static bool get_next_connection(int fd)
{
struct ubus_client *cl;
int client_fd;
client_fd = accept(fd, NULL, 0);
if (client_fd < 0) {
switch (errno) {
case ECONNABORTED:
case EINTR:
return true;
default:
return false;
}
}
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;
}
static void server_cb(struct uloop_fd *fd, unsigned int events)
{
bool next;
do {
next = get_next_connection(fd->fd);
} while (next);
}
static int
rrdns_next_query(struct rrdns_context *rctx)
{
const char *addr = NULL, *hex = "0123456789abcdef";
struct rrdns_request *req;
int i, alen, family;
char *p, dname[73];
union {
unsigned char uchar[4];
struct in6_addr in6;
struct in_addr in;
} a = { };
union {
unsigned char buf[512];
HEADER hdr;
} msg;
if (rctx->addr_rem > 0 &&
blob_pad_len(rctx->addr_cur) <= rctx->addr_rem &&
blob_pad_len(rctx->addr_cur) >= sizeof(struct blob_attr)) {
addr = blobmsg_get_string(rctx->addr_cur);
rctx->addr_rem -= blob_pad_len(rctx->addr_cur);
rctx->addr_cur = blob_next(rctx->addr_cur);
}
if (!addr)
return 0;
if (inet_pton(AF_INET6, addr, &a.in6)) {
memset(dname, 0, sizeof(dname));
for (i = 0, p = dname; i < 16; i++) {
*p++ = hex[a.in6.s6_addr[15-i] % 16];
*p++ = '.';
*p++ = hex[a.in6.s6_addr[15-i] / 16];
*p++ = '.';
}
p += snprintf(p, p - dname - 1, "ip6.arpa");
family = AF_INET6;
alen = p - dname;
}
else if (inet_pton(AF_INET, addr, &a.in)) {
family = AF_INET;
alen = snprintf(dname, sizeof(dname), "%u.%u.%u.%u.in-addr.arpa",
a.uchar[3], a.uchar[2], a.uchar[1], a.uchar[0]);
}
else {
return -EINVAL;
}
alen = res_mkquery(QUERY, dname, C_IN, T_PTR, NULL, 0, NULL,
msg.buf, sizeof(msg.buf));
if (alen < 0)
return alen;
if (avl_find(&rctx->request_addrs, &a.in6))
return -ENOTUNIQ;
if (send(rctx->socket.fd, msg.buf, alen, 0) != alen)
return -errno;
req = calloc(1, sizeof(*req));
if (!req)
return -ENOMEM;
req->id = msg.hdr.id;
req->by_id.key = &req->id;
avl_insert(&rctx->request_ids, &req->by_id);
req->family = family;
req->addr.in6 = a.in6;
req->by_addr.key = &req->addr.in6;
avl_insert(&rctx->request_addrs, &req->by_addr);
return 0;
}
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;
/* first try to tx more pending data */
while ((ub = ubus_msg_head(cl))) {
int written;
written = ubus_msg_writev(sock->fd, ub, cl->txq_ofs);
if (written < 0) {
switch(errno) {
case EINTR:
case EAGAIN:
break;
default:
goto disconnect;
}
break;
}
cl->txq_ofs += written;
if (cl->txq_ofs < ub->len + sizeof(ub->hdr))
break;
ubus_msg_dequeue(cl);
}
/* prevent further ULOOP_WRITE events if we don't have data
* to send anymore */
if (!ubus_msg_head(cl) && (events & ULOOP_WRITE))
uloop_fd_add(sock, ULOOP_READ | ULOOP_EDGE_TRIGGER);
retry:
if (!sock->eof && cl->pending_msg_offset < sizeof(cl->hdrbuf)) {
int offset = cl->pending_msg_offset;
int bytes;
bytes = read(sock->fd, (char *)&cl->hdrbuf + offset, sizeof(cl->hdrbuf) - offset);
if (bytes < 0)
goto out;
cl->pending_msg_offset += bytes;
if (cl->pending_msg_offset < sizeof(cl->hdrbuf))
goto out;
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);
if (!cl->pending_msg)
goto disconnect;
memcpy(&cl->pending_msg->hdr, &cl->hdrbuf.hdr, sizeof(cl->hdrbuf.hdr));
memcpy(cl->pending_msg->data, &cl->hdrbuf.data, sizeof(cl->hdrbuf.data));
}
ub = cl->pending_msg;
if (ub) {
int offset = cl->pending_msg_offset - sizeof(ub->hdr);
int len = blob_raw_len(ub->data) - offset;
int bytes = 0;
if (len > 0) {
bytes = read(sock->fd, (char *) ub->data + offset, len);
if (bytes <= 0)
goto out;
}
if (bytes < len) {
cl->pending_msg_offset += bytes;
goto out;
}
/* accept message */
cl->pending_msg_offset = 0;
cl->pending_msg = NULL;
ubusd_proto_receive_message(cl, ub);
goto retry;
}
out:
if (!sock->eof || ubus_msg_head(cl))
return;
disconnect:
handle_client_disconnect(cl);
}
