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Update network.c #6

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add check in artnet_net_recv() for not receiving ArtPoll from the sender (autoloop)

add check in artnet_net_recv() for not receiving ArtPoll from the sender (autoloop)
@@ -622,7 +622,8 @@ int artnet_net_recv(node n, artnet_packet p, int delay) {
return ARTNET_ENET;
}

if (cliAddr.sin_addr.s_addr == n->state.ip_addr.s_addr ||
if (((cliAddr.sin_addr.s_addr == n->state.ip_addr.s_addr) &&
!memcmp(p->data.ar.longname, n->state.long_name, ARTNET_LONG_NAME_LENGTH * sizeof(uint8_t)))||
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This is dangerous, it doesn't check the length of the received packet so it touched an out-of-bounds memory location.

See my comments on the issue.

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