These code from googlecode tinyos-main, r5538
In tos/lib/net/blip/UdpP.nc line 27 - 52 .
the alloc_lport function is used to allocate a port number for a udp client
by the sendtov() command of the UDP Interface.
but the statment " *last_localport = (last_localport < LOCAL_PORT_START) ?
last_localport + 1 : LOCAL_PORT_START; *" will always return the value
LOCAL_PORT_START since the condition *(last_localport <
LOCAL_PORT_START) *will
always be false;
it seem that this statement should be modified to *last_localport =
(last_localport < LOCAL_PORT_STOP) ? last_localport + 1 : LOCAL_PORT_START;*
*uint16_t local_ports[N_CLIENTS];
enum {
LOCAL_PORT_START = 51024U, // 0xc750
LOCAL_PORT_STOP = 54999U, // 0xd6d7
};
uint16_t last_localport = LOCAL_PORT_START;
uint16_t alloc_lport(uint8_t clnt) {
int i, done = 0;
uint16_t compare = htons(last_localport);
last_localport = (last_localport < LOCAL_PORT_START) ? last_localport +
1 : LOCAL_PORT_START;
while (!done) {
done = 1;
for (i = 0; i < N_CLIENTS; i++) {
if (local_ports[i] == compare) {
last_localport = (last_localport < LOCAL_PORT_START) ?
last_localport + 1 : LOCAL_PORT_START;
compare = htons(last_localport);
done = 0;
break;
}
}
}
return last_localport;
}*
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