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libipm: Add support for receiving file descriptors

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This commit is contained in:
matt335672
2023-01-09 14:11:43 +00:00
parent 8a71322fe4
commit c9adb3a2a6
4 changed files with 123 additions and 1 deletions
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libipm/libipm_recv.c
+35
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@@ -460,6 +460,36 @@ extract_char_ptr_type(char c, struct trans *trans, va_list *argptr)
return rv;
}
/**************************************************************************//**
* Extract a file descriptor from the input stream
*
* @param c Type letter which triggered the call
* @param trans libipm transport
* @param argptr argptr to pointer to receive the value
* @return != 0 for error
*/
static enum libipm_status
extract_fd_type(char c, struct trans *trans, va_list *argptr)
{
enum libipm_status rv = E_LI_SUCCESS;
struct libipm_priv *priv = (struct libipm_priv *)trans->extra_data;
/* File descriptor available? */
if (priv->in_fd_index >= priv->in_fd_count)
{
log_parse_error(trans, "No file descriptors available");
rv = E_LI_TOO_MANY_FDS;
}
else
{
int *tmp = va_arg(*argptr, int *);
*tmp = priv->in_fds[priv->in_fd_index++];
}
return rv;
}
/**************************************************************************//**
* Extract a fixed size block from the input stream
*
@@ -588,6 +618,10 @@ libipm_msg_in_parsev(struct trans *trans, const char *format, va_list *argptr)
rv = extract_char_ptr_type(c, trans, argptr);
break;
case 'h':
rv = extract_fd_type(c, trans, argptr);
break;
case 'B':
rv = extract_fsb_type(c, trans, argptr);
break;
@@ -650,6 +684,7 @@ libipm_msg_in_reset(struct trans *trans)
}
priv->in_msgno = 0;
priv->in_param_count = 0;
libipm_msg_in_close_file_descriptors(trans);
}
trans->extra_flags = 0;