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wsockd: add some stub i/o code

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This commit is contained in:
William Pitcock 2016-03-26 05:30:52 -05:00
parent 1fcba37404
commit 05e0aa9ac9
1 changed files with 151 additions and 33 deletions
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184
wsockd/wsockd.c
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@ -111,6 +111,8 @@ typedef struct _conn
static rb_dlink_list connid_hash_table[CONN_HASH_SIZE];
static rb_dlink_list dead_list;
static void conn_plain_read_shutdown_cb(rb_fde_t *fd, void *data);
#ifndef _WIN32
static void
dummy_handler(int sig)
@ -207,6 +209,87 @@ clean_dead_conns(void *unused)
dead_list.tail = dead_list.head = NULL;
}
static void
mod_write_ctl(rb_fde_t *F, void *data)
{
mod_ctl_t *ctl = data;
mod_ctl_buf_t *ctl_buf;
rb_dlink_node *ptr, *next;
int retlen, x;
RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head)
{
ctl_buf = ptr->data;
retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf,
ctl_buf->buflen, ppid);
if(retlen > 0)
{
rb_dlinkDelete(ptr, &ctl->writeq);
for(x = 0; x < ctl_buf->nfds; x++)
rb_close(ctl_buf->F[x]);
rb_free(ctl_buf->buf);
rb_free(ctl_buf);
}
if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
exit(0);
}
if(rb_dlink_list_length(&ctl->writeq) > 0)
rb_setselect(ctl->F, RB_SELECT_WRITE, mod_write_ctl, ctl);
}
static void
mod_cmd_write_queue(mod_ctl_t * ctl, const void *data, size_t len)
{
mod_ctl_buf_t *ctl_buf;
ctl_buf = rb_malloc(sizeof(mod_ctl_buf_t));
ctl_buf->buf = rb_malloc(len);
ctl_buf->buflen = len;
memcpy(ctl_buf->buf, data, len);
ctl_buf->nfds = 0;
rb_dlinkAddTail(ctl_buf, &ctl_buf->node, &ctl->writeq);
mod_write_ctl(ctl->F, ctl);
}
static void
close_conn(conn_t * conn, int wait_plain, const char *fmt, ...)
{
va_list ap;
char reason[128]; /* must always be under 250 bytes */
uint8_t buf[256];
int len;
if(IsDead(conn))
return;
rb_rawbuf_flush(conn->modbuf_out, conn->mod_fd);
rb_rawbuf_flush(conn->plainbuf_out, conn->plain_fd);
rb_close(conn->mod_fd);
SetDead(conn);
rb_dlinkDelete(&conn->node, connid_hash(conn->id));
if(!wait_plain || fmt == NULL)
{
rb_close(conn->plain_fd);
rb_dlinkAdd(conn, &conn->node, &dead_list);
return;
}
rb_setselect(conn->plain_fd, RB_SELECT_READ, conn_plain_read_shutdown_cb, conn);
rb_setselect(conn->plain_fd, RB_SELECT_WRITE, NULL, NULL);
va_start(ap, fmt);
vsnprintf(reason, sizeof(reason), fmt, ap);
va_end(ap);
buf[0] = 'D';
uint32_to_buf(&buf[1], conn->id);
rb_strlcpy((char *) &buf[5], reason, sizeof(buf) - 5);
len = (strlen(reason) + 1) + 5;
mod_cmd_write_queue(conn->ctl, buf, len);
}
static conn_t *
make_conn(mod_ctl_t * ctl, rb_fde_t *mod_fd, rb_fde_t *plain_fd)
{
@ -233,7 +316,72 @@ cleanup_bad_message(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb)
}
static void
wsock_process_accept(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb)
conn_mod_handshake_cb(rb_fde_t *fd, void *data)
{
char inbuf[READBUF_SIZE];
conn_t *conn = data;
int length = 0;
if (conn == NULL)
return;
if (IsDead(conn))
return;
while (1)
{
if (IsDead(conn))
return;
length = rb_read(conn->plain_fd, inbuf, sizeof(inbuf));
if (length == 0 || (length < 0 && !rb_ignore_errno(errno)))
{
close_conn(conn, NO_WAIT, "Connection closed");
return;
}
}
}
static void
conn_mod_read_cb(rb_fde_t *fd, void *data)
{
}
static void
conn_plain_read_cb(rb_fde_t *fd, void *data)
{
}
static void
conn_plain_read_shutdown_cb(rb_fde_t *fd, void *data)
{
char inbuf[READBUF_SIZE];
conn_t *conn = data;
int length = 0;
if(conn == NULL)
return;
while(1)
{
length = rb_read(conn->plain_fd, inbuf, sizeof(inbuf));
if(length == 0 || (length < 0 && !rb_ignore_errno(errno)))
{
rb_close(conn->plain_fd);
rb_dlinkAdd(conn, &conn->node, &dead_list);
return;
}
if(length < 0)
{
rb_setselect(conn->plain_fd, RB_SELECT_READ, conn_plain_read_shutdown_cb, conn);
return;
}
}
}
static void
wsock_process(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb)
{
conn_t *conn;
uint32_t id;
@ -250,7 +398,7 @@ wsock_process_accept(mod_ctl_t * ctl, mod_ctl_buf_t * ctlb)
if(rb_get_type(conn->plain_fd) == RB_FD_UNKNOWN)
rb_set_type(conn->plain_fd, RB_FD_SOCKET);
// XXX todo
conn_mod_handshake_cb(conn->mod_fd, conn);
}
static void
@ -272,7 +420,7 @@ mod_process_cmd_recv(mod_ctl_t * ctl)
cleanup_bad_message(ctl, ctl_buf);
break;
}
wsock_process_accept(ctl, ctl_buf);
wsock_process(ctl, ctl_buf);
break;
}
default:
@ -324,36 +472,6 @@ mod_read_ctl(rb_fde_t *F, void *data)
rb_setselect(ctl->F, RB_SELECT_READ, mod_read_ctl, ctl);
}
static void
mod_write_ctl(rb_fde_t *F, void *data)
{
mod_ctl_t *ctl = data;
mod_ctl_buf_t *ctl_buf;
rb_dlink_node *ptr, *next;
int retlen, x;
RB_DLINK_FOREACH_SAFE(ptr, next, ctl->writeq.head)
{
ctl_buf = ptr->data;
retlen = rb_send_fd_buf(ctl->F, ctl_buf->F, ctl_buf->nfds, ctl_buf->buf,
ctl_buf->buflen, ppid);
if(retlen > 0)
{
rb_dlinkDelete(ptr, &ctl->writeq);
for(x = 0; x < ctl_buf->nfds; x++)
rb_close(ctl_buf->F[x]);
rb_free(ctl_buf->buf);
rb_free(ctl_buf);
}
if(retlen == 0 || (retlen < 0 && !rb_ignore_errno(errno)))
exit(0);
}
if(rb_dlink_list_length(&ctl->writeq) > 0)
rb_setselect(ctl->F, RB_SELECT_WRITE, mod_write_ctl, ctl);
}
static void
read_pipe_ctl(rb_fde_t *F, void *data)
{