Kyle Lemons / Mbed 2 deprecated NetTool

This is a low-level network debugging utility that utilizes raw packet i/o to construct and deconstruct tcp, udp, ipv4, arp, and icmp packets over ethernet.

Dependencies:   mbed

net/net.h@0:d494b853ce97, 2010-10-12 (annotated)

Committer:
etherealflaim
Date:
Tue Oct 12 05:32:59 2010 +0000
Revision:
0:d494b853ce97
Child:
2:e8e09adc41fc
Initial Publish - Slightly unfinished, but usable

Who changed what in which revision?

UserRevisionLine numberNew contents of line
etherealflaim 0:d494b853ce97 1 #ifndef NETWORK_H
etherealflaim 0:d494b853ce97 2 #define NETWORK_H
etherealflaim 0:d494b853ce97 3
etherealflaim 0:d494b853ce97 4 #include "mbed.h"
etherealflaim 0:d494b853ce97 5 #include "main.h"
etherealflaim 0:d494b853ce97 6
etherealflaim 0:d494b853ce97 7 #include "ctype.h"
etherealflaim 0:d494b853ce97 8
etherealflaim 0:d494b853ce97 9 // General networking checksum
etherealflaim 0:d494b853ce97 10 inline u16 checksum(void *_mem, unsigned int bytes, void *skip_byte = NULL, unsigned int skip_count = 0, u16 last = 0)
etherealflaim 0:d494b853ce97 11 {
etherealflaim 0:d494b853ce97 12 u32 sum = 0;
etherealflaim 0:d494b853ce97 13 u16 *mem = (u16*)_mem;
etherealflaim 0:d494b853ce97 14 unsigned int skip_start = (u16*)skip_byte - mem;
etherealflaim 0:d494b853ce97 15
etherealflaim 0:d494b853ce97 16 if (last)
etherealflaim 0:d494b853ce97 17 sum = last ^ 0xFFFF;
etherealflaim 0:d494b853ce97 18
etherealflaim 0:d494b853ce97 19 //main_log.printf("CK: 0x%8X", sum);
etherealflaim 0:d494b853ce97 20 for (register unsigned int i = 0; i < bytes/sizeof(u16); ++i)
etherealflaim 0:d494b853ce97 21 {
etherealflaim 0:d494b853ce97 22 // Skip bytes we don't use (e.g. the checksum itself)
etherealflaim 0:d494b853ce97 23 if (i == skip_start)
etherealflaim 0:d494b853ce97 24 i += skip_count/sizeof(u16);
etherealflaim 0:d494b853ce97 25
etherealflaim 0:d494b853ce97 26 // Sum them up
etherealflaim 0:d494b853ce97 27 sum += mem[i];
etherealflaim 0:d494b853ce97 28
etherealflaim 0:d494b853ce97 29 //main_log.printf("CK: + 0x%04X = 0x%8X", mem[i], sum);
etherealflaim 0:d494b853ce97 30 }
etherealflaim 0:d494b853ce97 31
etherealflaim 0:d494b853ce97 32 // One's complement of the one's complement sum
etherealflaim 0:d494b853ce97 33 sum += sum >> 16;
etherealflaim 0:d494b853ce97 34 sum &= 0xFFFF;
etherealflaim 0:d494b853ce97 35 sum ^= 0xFFFF;
etherealflaim 0:d494b853ce97 36
etherealflaim 0:d494b853ce97 37 //main_log.printf("CK: ~ 0x%8X", sum);
etherealflaim 0:d494b853ce97 38
etherealflaim 0:d494b853ce97 39 return (u16)(sum);
etherealflaim 0:d494b853ce97 40 }
etherealflaim 0:d494b853ce97 41
etherealflaim 0:d494b853ce97 42 // Generic u16 endian swapping
etherealflaim 0:d494b853ce97 43 inline void fix_endian_u16(u16 *p)
etherealflaim 0:d494b853ce97 44 {
etherealflaim 0:d494b853ce97 45 char *bytes = (char*)p;
etherealflaim 0:d494b853ce97 46 bytes[0] ^= bytes[1];
etherealflaim 0:d494b853ce97 47 bytes[1] ^= bytes[0];
etherealflaim 0:d494b853ce97 48 bytes[0] ^= bytes[1];
etherealflaim 0:d494b853ce97 49 }
etherealflaim 0:d494b853ce97 50
etherealflaim 0:d494b853ce97 51 // Generic u32 endian swapping
etherealflaim 0:d494b853ce97 52 inline void fix_endian_u32(u32 *p)
etherealflaim 0:d494b853ce97 53 {
etherealflaim 0:d494b853ce97 54 char *bytes = (char*)p;
etherealflaim 0:d494b853ce97 55 // Swap outer bytes
etherealflaim 0:d494b853ce97 56 bytes[0] ^= bytes[3];
etherealflaim 0:d494b853ce97 57 bytes[3] ^= bytes[0];
etherealflaim 0:d494b853ce97 58 bytes[0] ^= bytes[3];
etherealflaim 0:d494b853ce97 59 // Swap inner bytes
etherealflaim 0:d494b853ce97 60 bytes[1] ^= bytes[2];
etherealflaim 0:d494b853ce97 61 bytes[2] ^= bytes[1];
etherealflaim 0:d494b853ce97 62 bytes[1] ^= bytes[2];
etherealflaim 0:d494b853ce97 63 }
etherealflaim 0:d494b853ce97 64
etherealflaim 0:d494b853ce97 65 /* Printing character */
etherealflaim 0:d494b853ce97 66 #define PCHAR(x) (isprint(x)?(x):'.')
etherealflaim 0:d494b853ce97 67
etherealflaim 0:d494b853ce97 68 /* Hex dump a word-aligned number of bytes (may misbehave if length is not a multiple of 32 bits */
etherealflaim 0:d494b853ce97 69 inline void hex_dump(void *base, unsigned int length)
etherealflaim 0:d494b853ce97 70 {
etherealflaim 0:d494b853ce97 71 char line[/*indent*/ 2 + /*0x*/ 2 + /*addr*/ 8 + /* : */ 3 + /*4xXXXX */ 4*5 + /*: */ 2 + /*8x.*/ 8 + /*\0*/ 1];
etherealflaim 0:d494b853ce97 72 for (char *p = (char*)base; p - (char*)base < length; p += 8)
etherealflaim 0:d494b853ce97 73 {
etherealflaim 0:d494b853ce97 74 sprintf(line, " 0x%08X : %02X%02X %02X%02X %02X%02X %02X%02X : %c%c%c%c%c%c%c%c", p,
etherealflaim 0:d494b853ce97 75 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
etherealflaim 0:d494b853ce97 76 PCHAR(p[0]), PCHAR(p[1]), PCHAR(p[2]), PCHAR(p[3]), PCHAR(p[4]), PCHAR(p[5]), PCHAR(p[6]), PCHAR(p[7]));
etherealflaim 0:d494b853ce97 77 main_log.printf(line);
etherealflaim 0:d494b853ce97 78 }
etherealflaim 0:d494b853ce97 79 }
etherealflaim 0:d494b853ce97 80
etherealflaim 0:d494b853ce97 81 // Ethernet
etherealflaim 0:d494b853ce97 82 #include "ethernet.h"
etherealflaim 0:d494b853ce97 83
etherealflaim 0:d494b853ce97 84 // ARP and IP
etherealflaim 0:d494b853ce97 85 #include "arp.h"
etherealflaim 0:d494b853ce97 86 #include "ip.h"
etherealflaim 0:d494b853ce97 87
etherealflaim 0:d494b853ce97 88 // TCP, UDP, and ICMP
etherealflaim 0:d494b853ce97 89 #include "tcp.h"
etherealflaim 0:d494b853ce97 90 #include "udp.h"
etherealflaim 0:d494b853ce97 91 #include "icmp.h"
etherealflaim 0:d494b853ce97 92
etherealflaim 0:d494b853ce97 93 #endif // NETWORK_H