10.3 Sequence number calculations…………………………………………………………………….12
10.4 Queuing and transmitting data…………………………………………………………………….12
10.4.1 Silly window avoidance…………………………………………………………………………13
10.5 Receiving segments………………………………………………………………………………..13
10.5.1 Demultiplexing…………………………………………………………………………………..13
10.5.2 Receiving data…………………………………………………………………………………...14
10.6 Accepting new connections ……………………………………………………………………….14
10.7 Fast retransmit……………………………………………………………………………………..14
10.8 Timers……………………………………………………………………………………………..14
10.9 Round-trip time estimation………………………………………………………………………..15
10.10Congestion control………………………………………………………………………………..15
11 Interfacing the stack ………………………………………………………………………………15
12 Application Program Interface……………………………………………………………. ……..16
12.1 Basic concepts……………………………………………………………………………………..16
12.2 Implementation of the API……………………………………………………………………….. 17
13 Statistical code analysis ……………………………………………………………………………17
13.1 Lines of code………………………………………………………………………………………18
13.2 Object code size…………………………………………………………………………………...19
14 Performance analysis……………………………………………………………………… ……...20
15 API reference………………………………………………………………………………. ……...21
15.1 Data types………………………………………………………………………………………….21
15.1.1 Netbufs…………………………………………………………………………………………..21
15.2 Bu®er functions …………………………………………………………………………………..21
15.2.1 netbuf new()……………………………………………………………………………………..21
15.2.2 netbuf delete()…………………………………………………………………………………...21
15.2.3 netbuf alloc()…………………………………………………………………………………….22
15.2.4 netbuf free()……………………………………………………………………………………..22
15.2.5 netbuf ref()………………………………………………………………………………………22
15.2.6 netbuf len()……………………………………………………………………………………... 23
15.2.7 netbuf data()……………………………………………………………………………………. 23
15.2.8 netbuf next()……………………………………………………………………………………. 23
15.2.9 netbuf ¯rst()……………………………………………………………………………………..24
15.2.10 netbuf copy()…………………………………………………………………………………...24
15.2.11 netbuf chain()…………………………………………………………………………………..
24
15.2.12 netbuf fromaddr()………………………………………………………………………………24
15.2.13 netbuf fromport()……………………………………………………………………………… 25
16 Network connection functions …………………………………………………………………….25
16.0.14 netconn new()…………………………………………………………………………………..25
16.0.15 netconn delete()………………………………………………………………………………...25
16.0.16 netconn type()…………………………………………………………………………………..25
16.0.17 netconn peer()…………………………………………………………………………………. 25
16.0.18 netconn addr()………………………………………………………………………………… 26
16.0.19 netconn bind()………………………………………………………………………………… 26
16.0.20 netconn connect(……………………………………………………………………………….26
16.0.21 netconn listen()…………………………………………………………………………………26
16.0.22 netconn accept()………………………………………………………………………………..26
16.0.23 netconn recv()………………………………………………………………………………….27
16.0.24 netconn write()…………………………………………………………………………………28
16.0.25 netconn send()………………………………………………………………………………….29
16.0.26 netconn close()…………………………………………………………………………………30
17 BSD socket library ………………………………………………………………………………...30
17.1 The representation of a socket…………………………………………………………………….30
17.2 Allocating a socket ………………………………………………………………………………..30
17.2.1 The socket() call…………………………………………………………………………………30
17.3 Connection setup…………………………………………………………………………………..31
17.3.1 The bind() call…………………………………………………………………………………...31
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