github.com/google/syzkaller@v0.0.0-20240517125934-c0f1611a36d6/sys/linux/socket_packet.txt (about)

     1  # Copyright 2017 syzkaller project authors. All rights reserved.
     2  # Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
     3  
     4  # http://man7.org/linux/man-pages/man7/packet.7.html
     5  # https://www.kernel.org/doc/Documentation/networking/packet_mmap.txt
     6  
     7  # AF_PACKET support.
     8  
     9  include <linux/socket.h>
    10  include <linux/net.h>
    11  include <linux/if_ether.h>
    12  include <linux/if_arp.h>
    13  
    14  define ETH_P_ALL_BE	htons(ETH_P_ALL)
    15  
    16  resource sock_packet[sock]
    17  
    18  socket$packet(domain const[AF_PACKET], type flags[packet_socket_type], proto const[ETH_P_ALL_BE]) sock_packet
    19  bind$packet(fd sock_packet, addr ptr[in, sockaddr_ll], addrlen len[addr])
    20  connect$packet(fd sock_packet, addr ptr[in, sockaddr_ll], addrlen len[addr])
    21  accept$packet(fd sock_packet, peer ptr[out, sockaddr_ll, opt], peerlen ptr[inout, len[peer, int32]]) sock_packet
    22  accept4$packet(fd sock_packet, peer ptr[out, sockaddr_ll, opt], peerlen ptr[inout, len[peer, int32]], flags flags[accept_flags]) sock_packet
    23  
    24  sendto$packet(fd sock_packet, buf buffer[in], len len[buf], f flags[send_flags], addr ptr[in, sockaddr_ll, opt], addrlen len[addr])
    25  recvfrom$packet(fd sock_packet, buf buffer[out], len len[buf], f flags[recv_flags], addr ptr[in, sockaddr_ll, opt], addrlen len[addr])
    26  getsockname$packet(fd sock_packet, addr ptr[out, sockaddr_ll], addrlen ptr[inout, len[addr, int32]])
    27  getpeername$packet(fd sock_packet, peer ptr[out, sockaddr_ll], peerlen ptr[inout, len[peer, int32]])
    28  
    29  packet_socket_type = SOCK_RAW, SOCK_DGRAM
    30  packet_protocols = ETH_P_802_3, ETH_P_AX25, ETH_P_ALL, ETH_P_802_2, ETH_P_SNAP, ETH_P_DDCMP, ETH_P_WAN_PPP, ETH_P_PPP_MP, ETH_P_LOCALTALK, ETH_P_CAN, ETH_P_CANFD, ETH_P_PPPTALK, ETH_P_TR_802_2, ETH_P_MOBITEX, ETH_P_CONTROL, ETH_P_IRDA, ETH_P_ECONET, ETH_P_HDLC, ETH_P_ARCNET, ETH_P_DSA, ETH_P_TRAILER, ETH_P_PHONET, ETH_P_IEEE802154, ETH_P_CAIF, ETH_P_XDSA
    31  
    32  sockaddr_ll {
    33  	sll_family	const[AF_PACKET, int16]
    34  	sll_protocol	flags[packet_protocols, int16be]
    35  	sll_ifindex	ifindex
    36  	sll_hatype	const[ARPHRD_ETHER, int16]
    37  	sll_pkttype	int8
    38  	sll_halen	const[6, int8]
    39  	sll_addr	mac_addr
    40  	pad		array[const[0, int8], 2]
    41  }
    42  
    43  # Generic options
    44  
    45  packet_option_types_int = PACKET_RECV_OUTPUT, PACKET_COPY_THRESH, PACKET_AUXDATA, PACKET_ORIGDEV, PACKET_VERSION, PACKET_HDRLEN, PACKET_RESERVE, PACKET_LOSS, PACKET_VNET_HDR, PACKET_TX_TIMESTAMP, PACKET_TIMESTAMP, PACKET_FANOUT, PACKET_TX_HAS_OFF, PACKET_QDISC_BYPASS
    46  
    47  packet_option_types_buf = PACKET_ADD_MEMBERSHIP, PACKET_DROP_MEMBERSHIP, PACKET_RX_RING, PACKET_STATISTICS, PACKET_TX_RING, PACKET_FANOUT_DATA
    48  
    49  getsockopt$packet_int(fd sock_packet, level const[SOL_PACKET], optname flags[packet_option_types_int], optval ptr[out, int32], optlen ptr[inout, len[optval, int32]])
    50  setsockopt$packet_int(fd sock_packet, level const[SOL_PACKET], optname flags[packet_option_types_int], optval ptr[in, int32], optlen len[optval])
    51  getsockopt$packet_buf(fd sock_packet, level const[SOL_PACKET], optname flags[packet_option_types_buf], optval buffer[out], optlen ptr[inout, len[optval, int32]])
    52  setsockopt$packet_buf(fd sock_packet, level const[SOL_PACKET], optname flags[packet_option_types_buf], optval buffer[in], optlen len[optval])
    53  
    54  # Specific options
    55  
    56  packet_mreq {
    57  	mr_ifindex	ifindex
    58  	mr_type		const[ARPHRD_ETHER, int16]
    59  	mr_alen		len[mr_address, int16]
    60  	mr_address	mac_addr
    61  	pad		array[const[0, int8], 2]
    62  }
    63  
    64  setsockopt$packet_add_memb(fd sock_packet, level const[SOL_PACKET], optname const[PACKET_ADD_MEMBERSHIP], optval ptr[in, packet_mreq], optlen len[optval])
    65  setsockopt$packet_drop_memb(fd sock_packet, level const[SOL_PACKET], optname const[PACKET_DROP_MEMBERSHIP], optval ptr[in, packet_mreq], optlen len[optval])
    66  
    67  tpacket_req {
    68  	tp_block_size	int32
    69  	tp_block_nr	int32
    70  	tp_frame_size	int32
    71  	tp_frame_nr	int32
    72  }
    73  
    74  tpacket_req3 {
    75  	tp_block_size		int32
    76  	tp_block_nr		int32
    77  	tp_frame_size		int32
    78  	tp_frame_nr		int32
    79  	tp_retire_blk_tov	int32
    80  	tp_sizeof_priv		int32
    81  	tp_feature_req_word	int32
    82  }
    83  
    84  tpacket_req_u [
    85  	req	tpacket_req
    86  	req3	tpacket_req3
    87  ] [varlen]
    88  
    89  setsockopt$packet_rx_ring(fd sock_packet, level const[SOL_PACKET], optname const[PACKET_RX_RING], optval ptr[in, tpacket_req_u], optlen len[optval])
    90  setsockopt$packet_tx_ring(fd sock_packet, level const[SOL_PACKET], optname const[PACKET_TX_RING], optval ptr[in, tpacket_req_u], optlen len[optval])
    91  
    92  packet_fanout_types = PACKET_FANOUT_HASH, PACKET_FANOUT_LB, PACKET_FANOUT_CPU, PACKET_FANOUT_ROLLOVER, PACKET_FANOUT_RND, PACKET_FANOUT_QM, PACKET_FANOUT_CBPF, PACKET_FANOUT_EBPF, PACKET_FANOUT_FLAG_ROLLOVER, PACKET_FANOUT_FLAG_DEFRAG, PACKET_FANOUT_FLAG_UNIQUEID
    93  
    94  # TODO: Add descriptions
    95  _ = PACKET_MR_MULTICAST, PACKET_MR_PROMISC, PACKET_MR_ALLMULTI, PACKET_MR_UNICAST
    96  
    97  packet_fanout_val {
    98  	id	int16[0:4]
    99  	type	flags[packet_fanout_types, int16]
   100  }
   101  
   102  setsockopt$packet_fanout(fd sock_packet, level const[SOL_PACKET], optname const[PACKET_FANOUT], optval ptr[in, packet_fanout_val], optlen len[optval])
   103  
   104  setsockopt$packet_fanout_data(fd sock_packet, level const[SOL_PACKET], optname const[PACKET_FANOUT_DATA], optval ptr[in, sock_fprog], optlen len[optval])