/*
* scamper_fd_private
*
* allocate a private fd for scamper to manage. this fd is not shared amongst
* scamper.
*/
scamper_fd_t *scamper_fd_private(int fd,
scamper_fd_cb_t read_cb, void *read_param,
scamper_fd_cb_t write_cb, void *write_param)
{
scamper_fd_t *fdn = NULL;
if((fdn = fd_alloc(SCAMPER_FD_TYPE_PRIVATE, fd)) == NULL)
{
goto err;
}
if((fdn->fd_list_node = dlist_tail_push(fd_list, fdn)) == NULL)
goto err;
if(read_cb != NULL)
{
scamper_fd_read_set(fdn, read_cb, read_param);
scamper_fd_read_unpause(fdn);
}
if(write_cb != NULL)
{
scamper_fd_write_set(fdn, write_cb, write_param);
scamper_fd_write_unpause(fdn);
}
return fdn;
err:
if(fdn != NULL) fd_free(fdn);
return NULL;
}
/*
* scamper_writebuf_send
*
* register an iovec to send when it can be sent without blocking the
* rest of scamper.
*/
int scamper_writebuf_send(scamper_writebuf_t *wb, const void *data, size_t len)
{
struct iovec *iov = NULL;
/* make sure there is data to send */
if(len < 1)
return 0;
/*
* an error occured last time sendmsg(2) was called which makes this
* writebuf invalid
*/
if(wb->error != 0)
return -1;
/* allocate the iovec and fill it out */
if((iov = malloc_zero(sizeof(struct iovec))) == NULL ||
(iov->iov_base = memdup(data, len)) == NULL)
{
goto err;
}
iov->iov_len = len;
/* put the iovec at the tail of iovecs to send */
if(slist_tail_push(wb->iovs, iov) == NULL)
goto err;
if(wb->fdn != NULL)
scamper_fd_write_unpause(wb->fdn);
return 0;
err:
if(iov == NULL)
return -1;
if(iov->iov_base != NULL) free(iov->iov_base);
free(iov);
return -1;
}
