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#pragma once
/*
* Packet Sockets
*/
#include <c-stdaux.h>
#include <inttypes.h>
#include <linux/if_packet.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <unistd.h>
/*
* `struct sockaddr_ll` is too small to fit the Infiniband hardware address.
* Introduce `struct packet_sockaddr_ll` which is the same as the original,
* except the `sl_addr` field is extended to fit all the supported hardware
* addresses.
*/
struct packet_sockaddr_ll {
unsigned short sll_family;
__be16 sll_protocol;
int sll_ifindex;
unsigned short sll_hatype;
unsigned char sll_pkttype;
unsigned char sll_halen;
unsigned char sll_addr[32]; /* MAX_ADDR_LEN */
};
uint16_t packet_internet_checksum(const uint8_t *data, size_t len);
uint16_t packet_internet_checksum_udp(const struct in_addr *src_addr,
const struct in_addr *dst_addr,
uint16_t src_port,
uint16_t dst_port,
const uint8_t *data,
size_t size,
uint16_t checksum);
int packet_sendto_udp(int sockfd,
const void *buf,
size_t n_buf,
size_t *n_transmittedp,
const struct sockaddr_in *src_paddr,
const struct packet_sockaddr_ll *dest_haddr,
const struct sockaddr_in *dest_paddr,
uint8_t dscp);
int packet_recvfrom_udp(int sockfd,
void *buf,
size_t n_buf,
size_t *n_transmittedp,
struct sockaddr_in *src);
int packet_shutdown(int sockfd);
/* inline helpers */
static inline int packet_recv_udp(int sockfd,
void *buf,
size_t n_buf,
size_t *n_transmittedp) {
return packet_recvfrom_udp(sockfd, buf, n_buf, n_transmittedp, NULL);
}
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