e07f539ae0
This is in preparation for scatter-gather IO on the UDP receive path: save a getsockname() syscall by setting a flag if we get the numbering of all bound sockets in a strict sequence (expected, in practice) and repurpose the tap buffer to be also a socket receive buffer, passing it down to protocol handlers. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
#define UNIX_SOCK_PATH "/tmp/passt.socket"
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/**
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* struct tap_msg - Generic message descriptor for arrays of messages
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* @start: Pointer to message start
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* @l4_start: Pointer to L4 header
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* @len: Message length, with L2 headers
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* @l4_len: Message length, with L4 headers
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*/
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struct tap_msg {
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char *start;
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char *l4h;
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size_t len;
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size_t l4_len;
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};
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#define SOCK_BUF_BYTES (ETH_MAX_MTU * 4)
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#include "icmp.h"
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#include "tcp.h"
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#include "udp.h"
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/**
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* struct ctx - Execution context
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* @epollfd: file descriptor for epoll instance
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* @fd_unix: AF_UNIX socket for tap file descriptor
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* @v4: Enable IPv4 transport
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* @mac: Host MAC address
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* @mac_guest: Guest MAC address
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* @addr4: IPv4 address for external, routable interface
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* @addr4_seen: Latest IPv4 address seen as source from tap
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* @mask4: IPv4 netmask, network order
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* @gw4: Default IPv4 gateway, network order
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* @dns4: IPv4 DNS address, network order
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* @v6: Enable IPv6 transport
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* @addr6: IPv6 address for external, routable interface
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* @addr6_seen: Latest IPv6 global/site address seen as source from tap
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* @addr6_ll_seen: Latest IPv6 link-local address seen as source from tap
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* @gw6: Default IPv6 gateway
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* @dns4: IPv6 DNS address
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* @ifn: Name of routable interface
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*/
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struct ctx {
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int epollfd;
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int fd_unix;
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unsigned char mac[ETH_ALEN];
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unsigned char mac_guest[ETH_ALEN];
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int v4;
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uint32_t addr4;
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uint32_t addr4_seen;
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uint32_t mask4;
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uint32_t gw4;
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uint32_t dns4;
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int v6;
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struct in6_addr addr6;
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struct in6_addr addr6_seen;
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struct in6_addr addr6_ll_seen;
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struct in6_addr gw6;
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struct in6_addr dns6;
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char ifn[IF_NAMESIZE];
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struct icmp_ctx icmp;
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struct tcp_ctx tcp;
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struct udp_ctx udp;
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};
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