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# lrs_get_user_buffer_size

Buffer Functions

Retrieves the size of the user data buffer.

    long lrs_get_user_buffer_size( char *s_desc );

s_desc | A descriptor identifying a socket.

The lrs_get_user_buffer_size function retrieves the size of the user data buffer for the specified socket.

## Return Values

If this function fails, it returns NULL. If it succeeds, it returns a pointer to the converted buffer. You can also retrieve the converted buffer using lrs_get_user_buffer.

## Parameterization

You cannot use standard parameterization for any arguments in this function.

## Example

In the following example, lrs_get_user_buffer_size retrieves the size of the user buffer, "buf10", received on "socket1", containing "\x17\x01X-AUTHENTICATION-1".

    char *UserBuf, *StrToLog;

    int LenOfUserBuf;

    lrs_get_static_buffer("socket1", "buf10", 0, -1, NULL);

    UserBuf = lrs_get_user_buffer("socket1");

    LenOfUserBuf = lrs_get_user_buffer_size("socket1");

    StrToLog = (char*)malloc(LenOfUserBuf + 1);

    /* Copy user buffer and skip two unprintable characters at the beginning */

    strncpy(StrToLog, UserBuf+2, LenOfUserBuf-2);

    lr_output_message("UserBuf = \"%s\"", StrToLog);

    lr_output_message("The buffer size = \"%d\"", LenOfUserBuf);

The output generated by the above code, as seen in the VuGen Execution log is:
Message from run.c(52): UserBuf = "X-AUTHENTICATION-1"
Message from run.c(52): The buffer size = 20

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