static ssize_t socket_read(struct idesc *desc, void *buff,
size_t size) {
int ret;
struct msghdr msg;
struct iovec iov;
struct sock *sk = (struct sock *)desc;
assert(desc);
assert(desc->idesc_ops == &task_idx_ops_socket);
if (sk->shutdown_flag & (SHUT_RD + 1)) {
return -EPIPE;
}
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
iov.iov_base = buff;
iov.iov_len = size;
ret = krecvmsg(sk, &msg, desc->idesc_flags);
if (ret != 0) {
return ret;
}
return iov.iov_len;
}
/* read */
ssize_t recv(int sockfd, void *buff, size_t size, int flags) {
int ret;
struct msghdr msg;
struct iovec iov;
struct sock *sk;
socket_idesc_check(sockfd, sk);
if (sk->shutdown_flag & (SHUT_RD + 1))
return SET_ERRNO(EPIPE);
/* TODO remove this */
if (flags != 0) {
LOG_ERROR("recv", "flags are not supported");
return SET_ERRNO(EOPNOTSUPP);
}
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = flags;
iov.iov_base = buff;
iov.iov_len = size;
ret = krecvmsg(sk, &msg, sk->idesc.idesc_flags);
if (ret < 0) {
return SET_ERRNO(-ret);
}
return ret;
}
/* open? read */
ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags) {
int ret;
struct msghdr msg_;
struct sock *sk;
socket_idesc_check(sockfd, sk);
if (sk->shutdown_flag & (SHUT_RD + 1))
return SET_ERRNO(EPIPE);
if ((msg == NULL) || (msg->msg_iov == NULL)
|| (msg->msg_iovlen == 0)) {
return SET_ERRNO(EINVAL);
}
/* TODO remove this */
if (flags != 0) {
LOG_ERROR("recv", "flags are not supported");
return SET_ERRNO(EOPNOTSUPP);
}
memcpy(&msg_, msg, sizeof msg_);
msg_.msg_flags = flags;
ret = krecvmsg(sk, &msg_, sk->idesc.idesc_flags);
if (ret < 0) {
return SET_ERRNO(-ret);
}
msg->msg_name = msg_.msg_name;
msg->msg_namelen = msg_.msg_namelen;
msg->msg_flags = msg_.msg_flags;
return ret;
}
