main.c File Reference

ping — sends 4 ICMP echo requests via SOCK_RAW, measures RTT with clock_gettime(CLOCK_MONOTONIC), and prints per-packet timing + summary. Per D-08 through D-12. More...

#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <time.h>
#include <stdint.h>

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Macros
#define	SOCK_RAW   3
#define	IPPROTO_ICMP   1
#define	PING_COUNT   4
#define	ICMP_ECHO_ID   0x1234

Functions
static void	rprint (const char *s)
static void	rprint_int (long val)
	Convert a signed integer to decimal string and write via rprint.
static unsigned short	icmp_checksum (const void *data, int len)
	Compute ones-complement Internet checksum. Verbatim copy from user/rawtest/main.c.
static uint32_t	parse_ipv4 (const char *s)
	Parse "A.B.C.D" into the packed IPv4 layout used by miniOS raw sockets.
int	main (int argc, char *argv[])

Detailed Description

ping — sends 4 ICMP echo requests via SOCK_RAW, measures RTT with clock_gettime(CLOCK_MONOTONIC), and prints per-packet timing + summary. Per D-08 through D-12.

Macro Definition Documentation

ICMP_ECHO_ID

#define ICMP_ECHO_ID   0x1234

IPPROTO_ICMP

#define IPPROTO_ICMP   1

PING_COUNT

#define PING_COUNT   4

SOCK_RAW

#define SOCK_RAW   3

Function Documentation

icmp_checksum()

unsigned short icmp_checksum ( const void * data, int len )

static

Compute ones-complement Internet checksum. Verbatim copy from user/rawtest/main.c.

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main()

int main	(	int	argc,
		char *	argv[] )

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parse_ipv4()

uint32_t parse_ipv4 ( const char * s )

static

Parse "A.B.C.D" into the packed IPv4 layout used by miniOS raw sockets.

Per T-44-02-02: rejects malformed input by returning 0 when any octet exceeds 255 or fewer than 4 octets are present.

Returns

Packed IPv4 uint32 compatible with rawtest/QEMU_GW_ADDR, or 0 on parse failure.

rprint()

void rprint ( const char * s )

static

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rprint_int()

void rprint_int ( long val )

static

Convert a signed integer to decimal string and write via rprint.

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