Dependencies:
NetServices
Dependents:
HvZ
net/net.h@0:7e2eb93442e7, 2010-12-12 (annotated)
- Committer:
- etherealflaim
- Date:
- Sun Dec 12 19:34:41 2010 +0000
- Revision:
- 0:7e2eb93442e7
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
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| etherealflaim |
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/**
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@file net.h
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@brief This file encompasses all of the networking headers and includes them automatically
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This file has some utility functions and definitions used by all of the networking headers,
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and includes them all. This is the only file necessary to include to use all of the networking
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facilities in nettool
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*/
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#ifndef NETWORK_H
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#define NETWORK_H
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#include "mbed.h"
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#include "ctype.h"
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/// General networking checksum - Used for IP, TCP, UDP, ICMP, etc.
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/// Computes the one's complement of the one's complement sum of all of the given bytes except for the memory
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/// at skip_byte for skip_count bytes (e.g. the checksum). Optionally resumes computation from the (given) last checksum.
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inline u16 checksum(void *_mem, unsigned int bytes, void *skip_byte = NULL, unsigned int skip_count = 0, u16 last = 0)
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{
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u32 sum = 0;
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u16 *mem = (u16*)_mem;
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unsigned int skip_start = (u16*)skip_byte - mem;
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if (last)
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sum = last ^ 0xFFFF;
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//main_log.printf("CK: 0x%8X", sum);
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for (register unsigned int i = 0; i < bytes/sizeof(u16); ++i)
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{
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// Skip bytes we don't use (e.g. the checksum itself)
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if (i == skip_start)
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i += skip_count/sizeof(u16);
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// Sum them up
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sum += mem[i];
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//main_log.printf("CK: + 0x%04X = 0x%8X", mem[i], sum);
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}
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// One's complement of the one's complement sum
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sum += sum >> 16;
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sum &= 0xFFFF;
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sum ^= 0xFFFF;
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//main_log.printf("CK: ~ 0x%8X", sum);
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return (u16)(sum);
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}
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/// Generic u16 endian swapping
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inline void fix_endian_u16(u16 *p)
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{
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char *bytes = (char*)p;
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bytes[0] ^= bytes[1];
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bytes[1] ^= bytes[0];
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bytes[0] ^= bytes[1];
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}
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/// Generic u32 endian swapping
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inline void fix_endian_u32(u32 *p)
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{
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char *bytes = (char*)p;
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// Swap outer bytes
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bytes[0] ^= bytes[3];
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bytes[3] ^= bytes[0];
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bytes[0] ^= bytes[3];
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// Swap inner bytes
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bytes[1] ^= bytes[2];
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bytes[2] ^= bytes[1];
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bytes[1] ^= bytes[2];
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}
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/* Printing character */
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#define PCHAR(x) (isprint(x)?(x):'.')
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// Ethernet
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#include "ethernet.h"
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// ARP and IP
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#include "ip.h"
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// TCP, UDP, and ICMP
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#include "udp.h"
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#endif // NETWORK_H |
Kyle Lemons