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314134a445
In particular, avoid including linux/netdevice.h from headers. This is not a problem on newer distros, but required for CentOS 7.6. Signed-off-by: Tom Gundersen <teg@jklm.no>
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
#pragma once
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/*
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* Packet Sockets
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*/
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#include <c-stdaux.h>
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#include <inttypes.h>
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#include <linux/if_packet.h>
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#include <netinet/in.h>
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#include <stdlib.h>
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#include <unistd.h>
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/*
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* `struct sockaddr_ll` is too small to fit the Infiniband hardware address.
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* Introduce `struct packet_sockaddr_ll` which is the same as the original,
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* except the `sl_addr` field is extended to fit all the supported hardware
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* addresses.
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*/
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struct packet_sockaddr_ll {
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unsigned short sll_family;
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__be16 sll_protocol;
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int sll_ifindex;
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unsigned short sll_hatype;
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unsigned char sll_pkttype;
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unsigned char sll_halen;
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unsigned char sll_addr[32]; /* MAX_ADDR_LEN */
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};
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uint16_t packet_internet_checksum(const uint8_t *data, size_t len);
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uint16_t packet_internet_checksum_udp(const struct in_addr *src_addr,
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const struct in_addr *dst_addr,
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uint16_t src_port,
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uint16_t dst_port,
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const uint8_t *data,
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size_t size,
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uint16_t checksum);
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int packet_sendto_udp(int sockfd,
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const void *buf,
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size_t n_buf,
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size_t *n_transmittedp,
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const struct sockaddr_in *src_paddr,
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const struct packet_sockaddr_ll *dest_haddr,
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const struct sockaddr_in *dest_paddr);
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int packet_recvfrom_udp(int sockfd,
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void *buf,
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size_t n_buf,
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size_t *n_transmittedp,
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struct sockaddr_in *src);
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int packet_shutdown(int sockfd);
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/* inline helpers */
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static inline int packet_recv_udp(int sockfd,
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void *buf,
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size_t n_buf,
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size_t *n_transmittedp) {
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return packet_recvfrom_udp(sockfd, buf, n_buf, n_transmittedp, NULL);
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}
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