Re: [lwip-users] Pbuf Copy to Another Pbuf

[Duygu D.]

Hello,

Sorry for the wrong copy paste, my code is like in below: 

  mpBuf = pbuf_alloc(PBUF_RAW, p->len + (p->next? p->next->tot_len: 0) + 1, PBUF_POOL);

  mpBuf->len = p->len + 1;

  mpBuf->tot_len = mpBuf->tot_len + 1;

  for(i = 0; i < (p->len) ; i++)

  {

  ((uint8_t*)mpBuf->payload)[i] = ((uint8_t*)p->payload)[i];

  }

murat palaci <askermp@hotmail.com>, 4 Eki 2021 Pzt, 13:21 tarihinde şunu yazdı:

Hello;

The variable dummyCounter never changes in the for loop.. So result of dummyCounter is equal to zero always

you need to change variable dummyCounter to variable i. 

for(i = 0; i < (p->len) ; i++)

  {

  ((uint8_t*)mpBuf->payload)[dummyCounter] = ((uint8_t*)p->payload)[dummyCounter];

  }

Murat PALACI
Electronic & Software Designer

---

From: lwip-users <lwip-users-bounces+askermp=hotmail.com@nongnu.org> on behalf of Duygu D. <duygudemirpence@gmail.com>
Sent: Monday, October 4, 2021 11:53:33 AM
To: Mailing list for lwIP users <lwip-users@nongnu.org>
Subject: [lwip-users] Pbuf Copy to Another Pbuf

 

Hello,

I need to copy pBuf to another pBuf member, and I need to change size of the new buffer to be 1 larger than the previous one.

I am doing like these,

  mpBuf = pbuf_alloc(PBUF_RAW, p->len + (p->next? p->next->tot_len: 0) + 1, PBUF_POOL);

  mpBuf->len = p->len + 1;

  mpBuf->tot_len = mpBuf->tot_len + 1;

  for(i = 0; i < (p->len) ; i++)

  {

  ((uint8_t*)mpBuf->payload)[dummyCounter] = ((uint8_t*)p->payload)[dummyCounter];

  }

But I couldnt sure, successfully copied. What is the correct way ?

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Embeded System Engineer 

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Embeded System Engineer