Look at the definition of 'data' in the .h or in the docs: https://docs.fd.io/vpp/17.04/dd/d10/structvlib__buffer__t.html
It's not a pointer, ergo you cannot do this. That is not how the buffer mechanism works. Chris. From: vpp-dev-boun...@lists.fd.io [mailto:vpp-dev-boun...@lists.fd.io] On Behalf Of Li, Rujun Sent: Tuesday, February 28, 2017 3:44 To: vpp-dev@lists.fd.io Subject: [vpp-dev] wrong when i want to change vlib_buffer_t->data to my pointer Hi ,all Now I am working on VPP and I met a problem. I have a pointer pointing to packets receive from my changed DPDK and now I want to change vlib_buffer_t->data to my pointer to avoid memory copy, but the errors were reported that the vlib_buffer_t->data cannot be used as left value. My code looks like: Uint8_t * pktbuf; //do assignment to pktbuf Vlib_buffer_t * b = vlib_get_buffer(vm, tm->rx_buffers[i_rx]); b->data = pktbuf; and the error is : error: lvalue required as left operand of assignment is there is something wrong with my code or vlib_buffer_t is projected from assignment? Best Wishes, Rujun, Li
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