void peisk_bluetoothParseHELLO(char *buf,int len) {
int version;
char str[64];
PeisHostInfoPackage package;
if(len != sizeof(int) + 64 + sizeof(package)) {
fprintf(stderr,"Warning, received bluetooth HELLO of wrong length (%d)\n",len);
return;
}
memcpy((void*) &version, buf, sizeof(int)); buf += sizeof(int);
memcpy(str,buf,64); buf += 64;
memcpy(&package,buf,sizeof(package));
if(version != htonl(peisk_protocollVersion)) {
fprintf(stderr,"Warning, received bluetooth HELLO of wrong version\n");
return;
}
str[62]=0;
if(strcmp(str,peisk_networkString) != 0) {
fprintf(stderr,"Warning, received bluetooth HELLO with wrong networkstring %s\n",str);
return;
}
/* Convert package to be in HOST byte order */
peisk_ntoh_hostInfo(&package.hostInfo);
/* Send hostinfo to be processed by the P2P layer */
peisk_handleBroadcastedHostInfo(&package.hostInfo);
}
/** Listen to multicast/broadcasted UDP packages announcing peiskernels on the local network */
void peisk_acceptUDPMulticasts() {
int size;
PeisUDPBroadcastAnnounceMessage message;
if(peiskernel.tcp_broadcast_receiver <= 0) return;
while(1) {
size=recvfrom(peiskernel.tcp_broadcast_receiver,(void*)&message,sizeof(message),MSG_DONTWAIT,NULL,NULL);
if(size == -1) return;
if(size == sizeof(message)) {
/* convert broadcasted message so that all subfields within it is now in HOST order */
message.protocollVersion = ntohl(message.protocollVersion);
peisk_ntoh_hostInfo(&message.hostinfo);
if(message.hostinfo.id > 65535) {
/* Just for debugging - until we start using longer PEIS-id's */
printf("Warning - getting hostinfo with id = %d (%x) on the multicast\n",message.hostinfo.id,message.hostinfo.id);
}
/* Check if it matches the network connection strings */
message.networkString[63]=0;
if(strcmp(message.networkString,peisk_networkString) != 0) return;
if(message.protocollVersion > peisk_protocollVersion && message.protocollVersion < 1000) {
printf("ERROR - A newer version of the PEIS kernel exists - you should upgrade!\n");
peisk_shutdown();
}
if(message.protocollVersion != peisk_protocollVersion) return;
message.hostinfo.fullname[PEISK_MAX_HOSTINFO_NAME_LEN-1]=0; /* force name part of hostinfo to be a null terminated string */
/*printf("peisk: received host announcement for '%s'\n",hostinfo.fullname);*/
/* We received a full PeisHostInfo field describing another available host */
if(message.hostinfo.id == -1 || message.hostinfo.id == peisk_id) return;
peisk_handleBroadcastedHostInfo(&message.hostinfo);
/* Reset counter for deciding if we are allowed to broadcast if this one comes from our
host and have a lower ID than us. */
if(message.hostinfo.id < peiskernel.id &&
strcmp(message.hostinfo.hostname,peiskernel.hostInfo.hostname) == 0)
peiskernel.broadcastingCounter = 0;
}
}
}
