ch32v307v-r1的bsp，socket套接字设置FIONBIO提示失败

发布于 2024-07-26 20:01:32 浏览：281 订阅该版

1 个回答

shanqs 2024-07-29

这家伙很懒，什么也没写！

串口log如下，看样子是lwip_ioctl没有走进case: FIONBIO

```bash
msh />mb_slave_sample TCP
lwip_socket(PF_INET, SOCK_STREAM, 0) = 0
lwip_setsockopt(0, SOL_SOCKET, optname=0x4, ..) -> on
lwip_bind(0, addr=0.0.0.0 port=502)
lwip_bind(0) succeeded
lwip_listen(0, backlog=4)
msh />
msh />lwip_ioctl(0, UNIMPL: 0x4004667e, 200141cc)
[E/tcpserv] set socket ctl failed

```

```c
int
lwip_ioctl(int s, long cmd, void *argp)
{
  struct lwip_sock *sock = get_socket(s);
  u8_t val;
#if LWIP_SO_RCVBUF
  u16_t buflen = 0;
  int recv_avail;
#endif /* LWIP_SO_RCVBUF */

if (!sock) {
    return -1;
  }

switch (cmd) {
#if LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE
  case FIONREAD:
    if (!argp) {
      sock_set_errno(sock, EINVAL);
      return -1;
    }
#if LWIP_FIONREAD_LINUXMODE
    if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
      struct pbuf *p;
      if (sock->lastdata) {
        p = ((struct netbuf *)sock->lastdata)->p;
        *((int*)argp) = p->tot_len - sock->lastoffset;
      } else {
        struct netbuf *rxbuf;
        err_t err;
        if (sock->rcvevent <= 0) {
          *((int*)argp) = 0;
        } else {
          err = netconn_recv(sock->conn, &rxbuf);
          if (err != ERR_OK) {
            *((int*)argp) = 0;
          } else {
            sock->lastdata = rxbuf;
            sock->lastoffset = 0;
            *((int*)argp) = rxbuf->p->tot_len;
          }
        }
      }
      return 0;
    }
#endif /* LWIP_FIONREAD_LINUXMODE */

#if LWIP_SO_RCVBUF
    /* we come here if either LWIP_FIONREAD_LINUXMODE==0 or this is a TCP socket */
    SYS_ARCH_GET(sock->conn->recv_avail, recv_avail);
    if (recv_avail < 0) {
      recv_avail = 0;
    }
    *((int*)argp) = recv_avail;

/* Check if there is data left from the last recv operation. /maq 041215 */
    if (sock->lastdata) {
      struct pbuf *p = (struct pbuf *)sock->lastdata;
      if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) {
        p = ((struct netbuf *)p)->p;
      }
      buflen = p->tot_len;
      buflen -= sock->lastoffset;

*((int*)argp) += buflen;
    }

LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONREAD, %p) = %"U16_F"\n", s, argp, *((u16_t*)argp)));
    sock_set_errno(sock, 0);
    return 0;
#else /* LWIP_SO_RCVBUF */
    break;
#endif /* LWIP_SO_RCVBUF */
#endif /* LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE */

case (long)FIONBIO:
    val = 0;
    if (argp && *(u32_t*)argp) {
      val = 1;
    }
    netconn_set_nonblocking(sock->conn, val);
    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONBIO, %d)\n", s, val));
    sock_set_errno(sock, 0);
    return 0;

default:
    break;
  } /* switch (cmd) */
  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, UNIMPL: 0x%lx, %p)\n", s, cmd, argp));
  sock_set_errno(sock, ENOSYS); /* not yet implemented */
  return -1;
}
```