With the call graph shown in Figure 5.3 , you can trace udp_sendmsg () and tcp_sendmsg () to figure out how exactly these functions are implemented. Explain what the two big “while” loops in...

With the call graph shown in Figure 5.3 , you can trace udp_sendmsg () and tcp_sendmsg () to figure out how exactly these functions are implemented.

Explain what the two big “while” loops in tcp_sendmsg () are intended for. Why are such loop structures not shown in udp_sendmsg ()?