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1 /* TCP_SEQ.H |
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2 * Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 */ |
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5 |
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6 /* |
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7 * Copyright (c) 1982, 1986 Regents of the University of California. |
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8 * All rights reserved. The Berkeley software License Agreement |
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9 * specifies the terms and conditions for redistribution. |
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10 */ |
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11 |
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12 /** @file |
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13 @publishedAll |
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14 @released |
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15 */ |
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16 |
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17 #ifndef _NETINET_TCP_SEQ_H |
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18 #define _NETINET_TCP_SEQ_H |
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19 |
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20 #ifdef __cplusplus |
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21 extern "C" { |
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22 #endif |
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23 |
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24 /** |
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25 TCP sequence numbers are 32 bit integers operated |
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26 on with modular arithmetic. These macros can be |
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27 used to compare such integers. |
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28 */ |
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29 #define SEQ_LT(a, b) ((int)((a)-(b)) < 0) |
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30 #define SEQ_LEQ(a, b) ((int)((a)-(b)) <= 0) |
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31 #define SEQ_GT(a, b) ((int)((a)-(b)) > 0) |
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32 #define SEQ_GEQ(a, b) ((int)((a)-(b)) >= 0) |
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33 |
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34 /** |
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35 Macros to initialize tcp sequence numbers for |
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36 send and receive from initial send and receive |
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37 sequence numbers. |
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38 */ |
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39 #define tcp_rcvseqinit(tp) \ |
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40 (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1 |
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41 |
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42 #define tcp_sendseqinit(tp) \ |
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43 (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \ |
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44 (tp)->iss |
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45 |
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46 #define TCP_ISSINCR (125*1024) /* increment for tcp_iss each second */ |
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47 |
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48 #ifdef __cplusplus |
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49 } |
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50 #endif |
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51 |
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52 #endif /* _NETINET_TCP_SEQ_H */ |