Re: [Bluez-devel] [patch] alignment trap in hcid

["Frédéric Dalleau" <frederic.dalleau@access-company.com>]

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Damn me, I always forget this space after ifs...
Is there any way to test this, or hope it's ok ?

Frederic

Johan Hedberg wrote:
> On Feb 29, 2008, at 20:27, Marcel Holtmann wrote:
>   
>>> I recently met an alignment trap in hcid.
>>> Some device sent me an sdp request and the answer had to be
>>> fragmented because the device reception buffer was very small.
>>> After that i saw alignment trap.
>>> The last trace I saw was : Continuation state size: 8
>>> The trace is located at sdpd/request.c : static sdp_cont_state_t
>>> *sdp_cstate_get(uint8_t *buffer)
>>> This function returns an unaligned pointer.
>>>       
>> this is so funny since I know it was there, but the new qualification
>> tests don't find it anymore :)
>>
>> Please fix the coding style. You are missing some spaces after the  
>> "if".
>>
>> Johan, please have second look at the patch. It looks good to me.
>>     
>
> Looks good to me too.
>
> Johan
>
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diff --git a/sdpd/request.c b/sdpd/request.c
index 20e68b6..5e3c715 100644
--- a/sdpd/request.c
+++ b/sdpd/request.c
@@ -179,7 +179,10 @@ static sdp_cont_state_t *sdp_cstate_get(uint8_t *buffer)
 
 	pdata += sizeof(uint8_t);
 	if (cStateSize != 0) {
-		sdp_cont_state_t *cstate = (sdp_cont_state_t *)pdata;
+		sdp_cont_state_t *cstate = malloc(sizeof(sdp_cont_state_t));
+		if (!cstate)
+			return NULL;
+		memcpy(cstate, (sdp_cont_state_t *)pdata, sizeof(sdp_cont_state_t));
 		debug("Cstate TS : 0x%lx", cstate->timestamp);
 		debug("Bytes sent : %d", cstate->cStateValue.maxBytesSent);
 		return cstate;
@@ -408,6 +411,8 @@ static int service_search_req(sdp_req_t *req, sdp_buf_t *buf)
 	}
 
 done:	
+	if (cstate)
+		free(cstate);
 	if (pattern)
 		sdp_list_free(pattern, free);
 
@@ -593,6 +598,8 @@ static int service_attr_req(sdp_req_t *req, sdp_buf_t *buf)
 	buf->buf_size += sizeof(uint16_t);
 
 done:
+	if (cstate)
+		free(cstate);
 	if (seq)
                 sdp_list_free(seq, free);
 	if (status)
@@ -754,6 +761,8 @@ static int service_search_attr_req(sdp_req_t *req, sdp_buf_t *buf)
 	}
 
 done:
+	if (cstate)
+		free(cstate);
 	if (tmpbuf.data)
 		free(tmpbuf.data);
 	if (pattern)

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