void ArtNet::flush() { construct_packet(); _udp.beginPacket(_dest_ip, _port); _udp.write(_artnet_buffer,ART_NET_HEADER_SIZE+_num_channels+1); _udp.endPacket(); }
int main() { display_description(); unsigned char * packet; packet = (unsigned char *)malloc(28); int ret = construct_packet(packet); pcap_if_t *alldevs; pcap_if_t *d; int inum; int i=0; pcap_t *adhandle; char errbuf[PCAP_ERRBUF_SIZE]; u_int netmask; char packet_filter[] = ""; struct bpf_program fcode; /* Retrieve the device list */ if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL, &alldevs, errbuf) == -1) { fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf); exit(1); } /* Print the list */ for(d=alldevs; d; d=d->next) { printf("%d. %s", ++i, d->name); if (d->description) printf(" (%s)\n", d->description); else printf(" (No description available)\n"); } if(i==0) { printf("\nNo interfaces found! Make sure WinPcap is installed.\n"); return -1; } printf("Enter the interface number (1-%d):",i); scanf_s("%d", &inum); if(inum < 1 || inum > i) { printf("\nInterface number out of range.\n"); /* Free the device list */ pcap_freealldevs(alldevs); return -1; } /* Jump to the selected adapter */ for(d=alldevs, i=0; i< inum-1 ;d=d->next, i++); /* Open the adapter */ if ( (adhandle= pcap_open(d->name, // name of the device 65536, // portion of the packet to capture. // 65536 grants that the whole packet will be captured on all the MACs. PCAP_OPENFLAG_PROMISCUOUS, // promiscuous mode 1000, // read timeout NULL, // remote authentication errbuf // error buffer ) ) == NULL) { fprintf(stderr,"\nUnable to open the adapter. %s is not supported by WinPcap\n"); /* Free the device list */ pcap_freealldevs(alldevs); return -1; } /* Check the link layer. We support only Ethernet for simplicity. */ if(pcap_datalink(adhandle) != DLT_EN10MB) { fprintf(stderr,"\nThis program works only on Ethernet networks.\n"); /* Free the device list */ pcap_freealldevs(alldevs); return -1; } if(d->addresses != NULL) /* Retrieve the mask of the first address of the interface */ netmask=((struct sockaddr_in *)(d->addresses->netmask))->sin_addr.S_un.S_addr; else /* If the interface is without addresses we suppose to be in a C class network */ netmask=0xffffff; //compile the filter if (pcap_compile(adhandle, &fcode, packet_filter, 1, netmask) <0 ) { fprintf(stderr,"\nUnable to compile the packet filter. Check the syntax.\n"); /* Free the device list */ pcap_freealldevs(alldevs); return -1; } //set the filter if (pcap_setfilter(adhandle, &fcode)<0) { fprintf(stderr,"\nError setting the filter.\n"); /* Free the device list */ pcap_freealldevs(alldevs); return -1; } printf("\nlistening on %s...\n", d->description); /* At this point, we don't need any more the device list. Free it */ pcap_freealldevs(alldevs); // for(int y = 0; y < 100; y++){ // if (pcap_sendpacket(adhandle, packet, sizeof(packet) /* size */) != 0) // { // fprintf(stderr,"\nError sending the packet: \n", pcap_geterr(adhandle)); // return -1; // } //} /* start the capture */ pcap_loop(adhandle, 0, handle_packet, NULL); return 0; }
void ArtNet::begin(EthernetUDP udp, IPAddress destination_ip) { _udp = udp; _dest_ip = destination_ip; construct_packet(); }