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#pragma once
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define eprintf(fmt, ...) fprintf(stderr, "netstack: "fmt"\n" __VA_OPT__(,) __VA_ARGS__)
uint32_t crc32(const uint8_t *buf, size_t len);
uint16_t ip_checksum(const uint8_t *buf, size_t len);
uint16_t ip_checksumphdr(
const uint8_t *buf, size_t len,
uint32_t ip1, uint32_t ip2,
uint16_t proto);
/* 0 on success, negative failure */
int ip_parse(const char *s, uint32_t *ip);
static inline void nput16(void *vbuf, uint16_t n) {
uint8_t *b = vbuf;
b[0] = n >> 8;
b[1] = n >> 0;
}
static inline void nput32(void *vbuf, uint32_t n) {
uint8_t *b = vbuf;
b[0] = n >> 24;
b[1] = n >> 16;
b[2] = n >> 8;
b[3] = n >> 0;
}
static inline uint16_t nget16(const void *vbuf) {
const uint8_t *b = vbuf;
return (b[0] << 8)
| (b[1] << 0);
}
static inline uint32_t nget32(const void *vbuf) {
const uint8_t *b = vbuf;
return (b[0] << 24)
| (b[1] << 16)
| (b[2] << 8)
| (b[3] << 0);
}
|
