410 lines
11 KiB
C
410 lines
11 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause */
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#ifndef SLIRP_H
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#define SLIRP_H
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#define SLIRP_VERSION_STRING "4.8.0"
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#ifdef __CYGWIN__
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#define __USE_W32_SOCKETS
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#define _WIN32
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#endif
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#ifdef BX_PLUGGABLE
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#include "bochs.h"
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#else
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#include "config.h"
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#endif
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#ifdef _WIN32
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/* as defined in sdkddkver.h */
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#ifdef _WIN32_WINNT
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#if _WIN32_WINNT < 0x0601
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#undef _WIN32_WINNT
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#endif
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#endif
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#ifndef _WIN32_WINNT
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#define _WIN32_WINNT 0x0601 /* Windows 7 */
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#endif
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/* reduces the number of implicitly included headers */
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <winsock2.h>
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#include <windows.h>
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#include <ws2tcpip.h>
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#include <sys/timeb.h>
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#include <iphlpapi.h>
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#else
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#define O_BINARY 0
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#endif
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#ifndef _WIN32
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#include <sys/uio.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#endif
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#ifdef __APPLE__
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#include <sys/filio.h>
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#endif
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#include "compat.h"
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#include "debug.h"
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#include "util.h"
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#include "libslirp.h"
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#include "ip.h"
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#include "ip6.h"
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#include "tcp.h"
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#include "tcp_timer.h"
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#include "tcp_var.h"
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#include "tcpip.h"
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#include "udp.h"
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#include "ip_icmp.h"
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#include "ip6_icmp.h"
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#include "mbuf.h"
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#include "sbuf.h"
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#include "socket.h"
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#include "if.h"
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#include "main.h"
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#include "misc.h"
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#include "bootp.h"
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#include "tftp.h"
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#define ARPOP_REQUEST 1 /* ARP request */
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#define ARPOP_REPLY 2 /* ARP reply */
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struct ethhdr {
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unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
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unsigned char h_source[ETH_ALEN]; /* source ether addr */
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unsigned short h_proto; /* packet type ID field */
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};
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SLIRP_PACKED_BEGIN
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struct slirp_arphdr {
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unsigned short ar_hrd; /* format of hardware address */
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unsigned short ar_pro; /* format of protocol address */
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unsigned char ar_hln; /* length of hardware address */
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unsigned char ar_pln; /* length of protocol address */
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unsigned short ar_op; /* ARP opcode (command) */
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/*
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* Ethernet looks like this : This bit is variable sized however...
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*/
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uint8_t ar_sha[ETH_ALEN]; /* sender hardware address */
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uint32_t ar_sip; /* sender IP address */
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uint8_t ar_tha[ETH_ALEN]; /* target hardware address */
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uint32_t ar_tip; /* target IP address */
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} SLIRP_PACKED_END;
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#define ARP_TABLE_SIZE 16
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typedef struct ArpTable {
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struct slirp_arphdr table[ARP_TABLE_SIZE];
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int next_victim;
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} ArpTable;
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/* Add a new ARP entry for the given addresses */
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void arp_table_add(Slirp *slirp, uint32_t ip_addr,
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const uint8_t ethaddr[ETH_ALEN]);
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/* Look for an ARP entry for the given IP address */
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bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
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uint8_t out_ethaddr[ETH_ALEN]);
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struct ndpentry {
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uint8_t eth_addr[ETH_ALEN]; /* sender hardware address */
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struct in6_addr ip_addr; /* sender IP address */
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};
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#define NDP_TABLE_SIZE 16
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typedef struct NdpTable {
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struct ndpentry table[NDP_TABLE_SIZE];
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/*
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* The table is a cache with old entries overwritten when the table fills.
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* Preserve the first entry: it is the guest, which is needed for lazy
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* hostfwd guest address assignment.
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*/
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struct in6_addr guest_in6_addr;
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int next_victim;
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} NdpTable;
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/* Add a new NDP entry for the given addresses */
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void ndp_table_add(Slirp *slirp, struct in6_addr ip_addr,
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uint8_t ethaddr[ETH_ALEN]);
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/* Look for an NDP entry for the given IPv6 address */
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bool ndp_table_search(Slirp *slirp, struct in6_addr ip_addr,
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uint8_t out_ethaddr[ETH_ALEN]);
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/* Slirp configuration, specified by the application */
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struct Slirp {
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int cfg_version;
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unsigned time_fasttimo;
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unsigned last_slowtimo;
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bool do_slowtimo;
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bool in_enabled, in6_enabled;
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/* virtual network configuration */
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struct in_addr vnetwork_addr;
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struct in_addr vnetwork_mask;
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struct in_addr vhost_addr;
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struct in6_addr vprefix_addr6;
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uint8_t vprefix_len;
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struct in6_addr vhost_addr6;
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bool disable_dhcp; /* slirp will not reply to any DHCP requests */
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struct in_addr vdhcp_startaddr;
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struct in_addr vnameserver_addr;
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struct in6_addr vnameserver_addr6;
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struct in_addr client_ipaddr;
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char client_hostname[33];
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int restricted;
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struct gfwd_list *guestfwd_list;
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int if_mtu;
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int if_mru;
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bool disable_host_loopback;
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uint32_t mfr_id;
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uint8_t oob_eth_addr[ETH_ALEN];
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/* mbuf states */
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struct slirp_quehead m_freelist;
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struct slirp_quehead m_usedlist;
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int mbuf_alloced;
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/* if states */
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struct slirp_quehead if_fastq; /* fast queue (for interactive data) */
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struct slirp_quehead if_batchq; /* queue for non-interactive data */
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bool if_start_busy; /* avoid if_start recursion */
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/* ip states */
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struct ipq ipq; /* ip reass. queue */
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uint16_t ip_id; /* ip packet ctr, for ids */
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/* bootp/dhcp states */
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BOOTPClient bootp_clients[NB_BOOTP_CLIENTS];
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char *bootp_filename;
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size_t vdnssearch_len;
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uint8_t *vdnssearch;
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char *vdomainname;
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/* tcp states */
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struct socket tcb;
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struct socket *tcp_last_so;
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tcp_seq tcp_iss; /* tcp initial send seq # */
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uint32_t tcp_now; /* for RFC 1323 timestamps */
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/* udp states */
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struct socket udb;
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struct socket *udp_last_so;
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/* icmp states */
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struct socket icmp;
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struct socket *icmp_last_so;
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/* tftp states */
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char *tftp_prefix;
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struct tftp_session tftp_sessions[TFTP_SESSIONS_MAX];
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char *tftp_server_name;
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ArpTable arp_table;
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NdpTable ndp_table;
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void *ra_timer;
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bool enable_emu;
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const SlirpCb *cb;
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void *opaque;
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struct sockaddr_in *outbound_addr;
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struct sockaddr_in6 *outbound_addr6;
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bool disable_dns; /* slirp will not redirect/serve any DNS packet */
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};
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/*
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* Send one packet from each session.
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* If there are packets on the fastq, they are sent FIFO, before
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* everything else. Then we choose the first packet from each
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* batchq session (socket) and send it.
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* For example, if there are 3 ftp sessions fighting for bandwidth,
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* one packet will be sent from the first session, then one packet
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* from the second session, then one packet from the third.
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*/
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void if_start(Slirp *);
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/* Get the address of the DNS server on the host side */
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int get_dns_addr(struct in_addr *pdns_addr);
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/* Get the IPv6 address of the DNS server on the host side */
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int get_dns6_addr(struct in6_addr *pdns6_addr, uint32_t *scope_id);
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/* ncsi.c */
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/* Process NCSI packet coming from the guest */
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void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len);
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#ifndef _WIN32
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#include <netdb.h>
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#endif
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/* Whether we should send TCP keepalive packets */
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extern bool slirp_do_keepalive;
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#define TCP_MAXIDLE (TCPTV_KEEPCNT * TCPTV_KEEPINTVL)
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/* dnssearch.c */
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/* Translate from vdnssearch in configuration, into Slirp */
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int translate_dnssearch(Slirp *s, const char ** names);
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/* cksum.c */
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/* Compute the checksum of the mbuf */
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int cksum(struct mbuf *m, int len);
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/* Compute the checksum of the mbuf which contains an IPv6 packet */
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int ip6_cksum(struct mbuf *m);
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/* if.c */
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/* Called from slirp_new */
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void if_init(Slirp *);
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/* Queue packet into an output queue (fast or batch), for sending to the guest */
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void if_output(struct socket *, struct mbuf *);
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/* ip_input.c */
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/* Called from slirp_new */
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void ip_init(Slirp *);
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/* Called from slirp_cleanup */
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void ip_cleanup(Slirp *);
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/* Process IPv4 packet coming from the guest */
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void ip_input(struct mbuf *);
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/*
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* IP timer processing;
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* if a timer expires on a reassembly
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* queue, discard it.
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*/
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void ip_slowtimo(Slirp *);
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/*
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* Strip out IP options, at higher
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* level protocol in the kernel.
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*/
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void ip_stripoptions(struct mbuf *);
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/* ip_output.c */
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/* Send IPv4 packet to the guest */
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int ip_output(struct socket *, struct mbuf *);
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/* ip6_input.c */
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/* Called from slirp_new, but after other initialization */
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void ip6_post_init(Slirp *);
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/* Called from slirp_cleanup */
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void ip6_cleanup(Slirp *);
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/* Process IPv6 packet coming from the guest */
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void ip6_input(struct mbuf *);
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/* ip6_output */
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/* Send IPv6 packet to the guest */
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int ip6_output(struct socket *, struct mbuf *, int fast);
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/* tcp_input.c */
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/* Process TCP datagram coming from the guest */
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void tcp_input(struct mbuf *, int, struct socket *, unsigned short af);
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/* Determine a reasonable value for maxseg size */
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int tcp_mss(struct tcpcb *, unsigned offer);
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/* tcp_output.c */
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/* Send TCP datagram to the guest */
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int tcp_output(struct tcpcb *);
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/* Start/restart persistence timer */
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void tcp_setpersist(struct tcpcb *);
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/* tcp_subr.c */
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/* Called from slirp_new */
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void tcp_init(Slirp *);
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/* Called from slirp_cleanup */
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void tcp_cleanup(Slirp *);
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/*
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* Create template to be used to send tcp packets on a connection.
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* Call after host entry created, fills
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* in a skeletal tcp/ip header, minimizing the amount of work
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* necessary when the connection is used.
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*/
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void tcp_template(struct tcpcb *);
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/*
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* Send a single message to the TCP at address specified by
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* the given TCP/IP header.
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*/
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void tcp_respond(struct tcpcb *, struct tcpiphdr *,
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struct mbuf *, tcp_seq, tcp_seq, int, unsigned short);
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/*
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* Create a new TCP control block, making an
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* empty reassembly queue and hooking it to the argument
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* protocol control block.
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*/
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struct tcpcb * tcp_newtcpcb(struct socket *);
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/*
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* Close a TCP control block:
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* discard all space held by the tcp
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* discard internet protocol block
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* wake up any sleepers
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*/
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struct tcpcb *tcp_close(struct tcpcb *);
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/* The Internet socket got closed, tell the guest */
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void tcp_sockclosed(struct tcpcb *);
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/*
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* Connect to a host on the Internet
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* Called by tcp_input
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*/
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int tcp_fconnect(struct socket *, unsigned short af);
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/* Accept the connection from the Internet, and connect to the guest */
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void tcp_connect(struct socket *);
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/* Attach a TCPCB to a socket */
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void tcp_attach(struct socket *);
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/* * Return TOS according to the ports */
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uint8_t tcp_tos(struct socket *);
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/*
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* We received a packet from the guest.
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*
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* Emulate programs that try and connect to us
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* This includes ftp (the data connection is
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* initiated by the server) and IRC (DCC CHAT and
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* DCC SEND) for now
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*/
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int tcp_emu(struct socket *, struct mbuf *);
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/* Configure the socket, now that the guest completed accepting the connection */
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int tcp_ctl(struct socket *);
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/*
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* Drop a TCP connection, reporting
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* the specified error. If connection is synchronized,
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* then send a RST to peer.
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*/
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struct tcpcb *tcp_drop(struct tcpcb *tp, int err);
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/* Find the socket for the guest address and port */
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struct socket *slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr,
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int guest_port);
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/* Send a frame to the virtual Ethernet board, i.e. call the application send_packet callback */
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void slirp_send_packet_all(Slirp *slirp, const void *buf, size_t len);
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/* Create a new timer, i.e. call the application timer_new callback */
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void *slirp_timer_new(Slirp *slirp, SlirpTimerId id, void *cb_opaque);
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/* Bochs addition */
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void slirplog_error(const char *fmt, ...) BX_CPP_AttrPrintf(1, 2);
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void slirplog_debug(const char *fmt, ...) BX_CPP_AttrPrintf(1, 2);
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#endif
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