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libwmc: add testcases that talk to the device

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This commit is contained in:
Dan Williams
2011-11-11 12:21:41 -06:00
parent 83c9058376
commit ae3f1cd578
9 changed files with 293 additions and 30 deletions
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libwmc/src/utils.c
+77 -2
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@@ -236,7 +236,7 @@ hdlc_encapsulate_buffer (char *inbuf,
*
* Returns: size of the encapsulated data writted to @outbuf.
*/
gsize
static gsize
uml290_wmc_encapsulate (char *inbuf,
gsize cmd_len,
gsize inbuf_len,
@@ -251,7 +251,7 @@ uml290_wmc_encapsulate (char *inbuf,
g_return_val_if_fail (inbuf_len >= cmd_len + 2, 0); /* space for CRC */
g_return_val_if_fail (outbuf != NULL, 0);
estimated_out_len = inbuf_len + strlen (AT_WMC_PREFIX);
estimated_out_len = cmd_len + strlen (AT_WMC_PREFIX);
estimated_out_len += 3; /* CRC + trailer */
estimated_out_len += cmd_len * 1.3; /* escaping */
g_return_val_if_fail (outbuf_len > estimated_out_len, 0);
@@ -270,6 +270,40 @@ uml290_wmc_encapsulate (char *inbuf,
return encap_len;
}
/**
* wmc_encapsulate:
* @inbuf: data buffer to encapsulate
* @cmd_len: size of the data contained in @inbuf
* @inbuf_len: total size of @inbuf itself (not just the data)
* @outbuf: buffer in which to put the encapsulated data
* @outbuf_len: total size of @outbuf
* @uml290: if %TRUE return buffer suitable for sending to UML290 devices
*
* Escapes and CRCs given data using HDLC-style mechanisms.
*
* Returns: size of the encapsulated data writted to @outbuf.
*/
gsize
wmc_encapsulate (char *inbuf,
gsize cmd_len,
gsize inbuf_len,
char *outbuf,
gsize outbuf_len,
gboolean uml290)
{
g_return_val_if_fail (inbuf != NULL, 0);
g_return_val_if_fail (cmd_len >= 1, 0);
g_return_val_if_fail (inbuf_len >= cmd_len + 3, 0); /* space for CRC + trailer */
g_return_val_if_fail (outbuf != NULL, 0);
if (uml290)
return uml290_wmc_encapsulate (inbuf, cmd_len, inbuf_len, outbuf, outbuf_len);
/* Otherwise do normal WMC */
return hdlc_encapsulate_buffer (inbuf, cmd_len, inbuf_len,
0, TRUE, FALSE, outbuf, outbuf_len);
}
/**
* hdlc_decapsulate_buffer:
* @inbuf: buffer in which to look for an HDLC frame
@@ -382,3 +416,44 @@ hdlc_decapsulate_buffer (const char *inbuf,
return TRUE;
}
/**
* wmc_decapsulate:
* @inbuf: buffer in which to look for an HDLC frame
* @inbuf_len: length of valid data in @inbuf
* @outbuf: buffer in which to put decapsulated data from the HDLC frame
* @outbuf_len: max size of @outbuf
* @out_decap_len: on success, size of the decapsulated data
* @out_used: on either success or failure, amount of data used; caller should
* discard this much data from @inbuf before the next call to this function
* @out_need_more: when TRUE, indicates that more data is required before
* a determination about a valid HDLC frame can be made; caller should add
* more data to @inbuf before calling this function again.
* @uml290: if %TRUE decapsulate response from UML290 devices
*
* Attempts to retrieve, unescape, and CRC-check an HDLC frame from the given
* buffer.
*
* Returns: FALSE on error (packet was invalid or malformed, or the CRC check
* failed, etc) and places number of bytes to discard from @inbuf in @out_used.
* When TRUE, either more data is required (in which case @out_need_more will
* be TRUE), or a data packet was successfully retrieved from @inbuf and the
* decapsulated packet of length @out_decap_len was placed into @outbuf. In
* all cases the caller should advance the buffer by the number of bytes
* returned in @out_used before calling this function again.
**/
gboolean
wmc_decapsulate (const char *inbuf,
gsize inbuf_len,
char *outbuf,
gsize outbuf_len,
gsize *out_decap_len,
gsize *out_used,
gboolean *out_need_more,
gboolean uml290)
{
return hdlc_decapsulate_buffer (inbuf, inbuf_len,
uml290, uml290 ? 0x3030 : 0,
outbuf, outbuf_len,
out_decap_len, out_used, out_need_more);
}