LOWPAN_NHC_UDP_8BIT_PORT
LOWPAN_NHC_UDP_8BIT_PORT) {
tmp = ntohs(uh->dest) - LOWPAN_NHC_UDP_8BIT_PORT;
LOWPAN_NHC_UDP_8BIT_PORT) {
tmp = ntohs(uh->source) - LOWPAN_NHC_UDP_8BIT_PORT;
uh.dest = htons(val + LOWPAN_NHC_UDP_8BIT_PORT);
uh.source = htons(val + LOWPAN_NHC_UDP_8BIT_PORT);