b1c99fcdf5
Once again this was a long journey to reach the destination: Allow to instantiate slirp multiple times. But as in the past, the journey was worthwhile, cleaning up, fixing and enhancing various parts of the user space network stack along the way. What is this particular change good for? Multiple slirps instances allow separated user space networks for guests with multiple NICs. This is already possible, but without any slirp support for the second network, ie. without a chance to talk to that network from the host via IP. We have a legacy guest system here that benefits from this slirp enhancement, allowing us to run both of its NICs purely over unprivileged user space IP stacks. Another benefit of this patch is that it simply removes an artificial restriction of the configuration space qemu is providing, avoiding another source of surprises that users may face when playing with possible setups. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
373 lines
7.5 KiB
C
373 lines
7.5 KiB
C
#ifndef __COMMON_H__
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#define __COMMON_H__
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#include "config-host.h"
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#include "slirp_config.h"
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#ifdef _WIN32
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# include <inttypes.h>
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typedef uint8_t u_int8_t;
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typedef uint16_t u_int16_t;
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typedef uint32_t u_int32_t;
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typedef uint64_t u_int64_t;
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typedef char *caddr_t;
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# include <windows.h>
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# include <winsock2.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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# define EWOULDBLOCK WSAEWOULDBLOCK
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# define EINPROGRESS WSAEINPROGRESS
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# define ENOTCONN WSAENOTCONN
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# define EHOSTUNREACH WSAEHOSTUNREACH
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# define ENETUNREACH WSAENETUNREACH
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# define ECONNREFUSED WSAECONNREFUSED
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#else
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# define ioctlsocket ioctl
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# define closesocket(s) close(s)
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# define O_BINARY 0
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#endif
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#include <sys/types.h>
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#ifdef HAVE_SYS_BITYPES_H
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# include <sys/bitypes.h>
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#endif
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#include <sys/time.h>
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#ifdef NEED_TYPEDEFS
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typedef char int8_t;
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typedef unsigned char u_int8_t;
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# if SIZEOF_SHORT == 2
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typedef short int16_t;
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typedef unsigned short u_int16_t;
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# else
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# if SIZEOF_INT == 2
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typedef int int16_t;
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typedef unsigned int u_int16_t;
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# else
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#error Cannot find a type with sizeof() == 2
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# endif
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# endif
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# if SIZEOF_SHORT == 4
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typedef short int32_t;
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typedef unsigned short u_int32_t;
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# else
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# if SIZEOF_INT == 4
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typedef int int32_t;
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typedef unsigned int u_int32_t;
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# else
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#error Cannot find a type with sizeof() == 4
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# endif
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# endif
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#endif /* NEED_TYPEDEFS */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#include <stdio.h>
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#include <errno.h>
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#ifndef HAVE_MEMMOVE
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#define memmove(x, y, z) bcopy(y, x, z)
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#endif
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#if TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# include <strings.h>
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#endif
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#ifndef _WIN32
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#include <sys/uio.h>
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#endif
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#undef _P
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#ifndef NO_PROTOTYPES
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# define _P(x) x
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#else
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# define _P(x) ()
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#endif
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#ifndef _WIN32
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#endif
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#ifdef GETTIMEOFDAY_ONE_ARG
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#define gettimeofday(x, y) gettimeofday(x)
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#endif
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/* Systems lacking strdup() definition in <string.h>. */
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#if defined(ultrix)
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char *strdup _P((const char *));
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#endif
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/* Systems lacking malloc() definition in <stdlib.h>. */
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#if defined(ultrix) || defined(hcx)
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void *malloc _P((size_t arg));
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void free _P((void *ptr));
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#endif
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#ifndef HAVE_INET_ATON
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int inet_aton _P((const char *cp, struct in_addr *ia));
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#endif
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#include <fcntl.h>
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#ifndef NO_UNIX_SOCKETS
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#include <sys/un.h>
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#endif
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#include <signal.h>
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#ifdef HAVE_SYS_SIGNAL_H
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# include <sys/signal.h>
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#endif
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#ifndef _WIN32
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#include <sys/socket.h>
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#endif
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#if defined(HAVE_SYS_IOCTL_H)
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# include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_SELECT_H
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# include <sys/select.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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# include <sys/wait.h>
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#endif
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#ifdef HAVE_SYS_FILIO_H
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# include <sys/filio.h>
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#endif
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#ifdef USE_PPP
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#include <ppp/slirppp.h>
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#endif
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#ifdef __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#include <sys/stat.h>
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/* Avoid conflicting with the libc insque() and remque(), which
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have different prototypes. */
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#define insque slirp_insque
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#define remque slirp_remque
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#ifdef HAVE_SYS_STROPTS_H
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#include <sys/stropts.h>
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#endif
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#include "debug.h"
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#include "sys-queue.h"
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#include "libslirp.h"
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#include "ip.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 "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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#ifdef USE_PPP
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#include "ppp/pppd.h"
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#include "ppp/ppp.h"
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#endif
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#include "bootp.h"
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#include "tftp.h"
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struct Slirp {
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TAILQ_ENTRY(Slirp) entry;
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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 in_addr vdhcp_startaddr;
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struct in_addr vnameserver_addr;
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/* ARP cache for the guest IP addresses (XXX: allow many entries) */
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uint8_t client_ethaddr[6];
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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 timeval tt;
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struct ex_list *exec_list;
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/* mbuf states */
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struct mbuf m_freelist, m_usedlist;
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int mbuf_alloced;
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/* if states */
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int if_queued; /* number of packets queued so far */
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struct mbuf if_fastq; /* fast queue (for interactive data) */
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struct mbuf if_batchq; /* queue for non-interactive data */
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struct mbuf *next_m; /* pointer to next mbuf to output */
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/* ip states */
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struct ipq ipq; /* ip reass. queue */
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u_int16_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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/* 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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u_int32_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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/* 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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void *opaque;
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};
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extern Slirp *slirp_instance;
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#ifndef NULL
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#define NULL (void *)0
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#endif
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#ifndef FULL_BOLT
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void if_start _P((Slirp *));
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#else
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void if_start _P((struct ttys *));
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#endif
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#ifdef BAD_SPRINTF
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# define vsprintf vsprintf_len
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# define sprintf sprintf_len
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extern int vsprintf_len _P((char *, const char *, va_list));
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extern int sprintf_len _P((char *, const char *, ...));
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#endif
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#ifdef DECLARE_SPRINTF
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# ifndef BAD_SPRINTF
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extern int vsprintf _P((char *, const char *, va_list));
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# endif
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extern int vfprintf _P((FILE *, const char *, va_list));
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#endif
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#ifndef HAVE_STRERROR
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extern char *strerror _P((int error));
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#endif
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#ifndef HAVE_INDEX
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char *index _P((const char *, int));
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#endif
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#ifndef HAVE_GETHOSTID
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long gethostid _P((void));
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#endif
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void lprint _P((const char *, ...));
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#ifndef _WIN32
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#include <netdb.h>
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#endif
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#define DEFAULT_BAUD 115200
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#define SO_OPTIONS DO_KEEPALIVE
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#define TCP_MAXIDLE (TCPTV_KEEPCNT * TCPTV_KEEPINTVL)
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/* cksum.c */
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int cksum(struct mbuf *m, int len);
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/* if.c */
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void if_init _P((Slirp *));
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void if_output _P((struct socket *, struct mbuf *));
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/* ip_input.c */
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void ip_init _P((Slirp *));
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void ip_input _P((struct mbuf *));
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void ip_slowtimo _P((Slirp *));
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void ip_stripoptions _P((register struct mbuf *, struct mbuf *));
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/* ip_output.c */
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int ip_output _P((struct socket *, struct mbuf *));
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/* tcp_input.c */
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void tcp_input _P((register struct mbuf *, int, struct socket *));
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int tcp_mss _P((register struct tcpcb *, u_int));
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/* tcp_output.c */
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int tcp_output _P((register struct tcpcb *));
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void tcp_setpersist _P((register struct tcpcb *));
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/* tcp_subr.c */
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void tcp_init _P((Slirp *));
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void tcp_template _P((struct tcpcb *));
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void tcp_respond _P((struct tcpcb *, register struct tcpiphdr *, register struct mbuf *, tcp_seq, tcp_seq, int));
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struct tcpcb * tcp_newtcpcb _P((struct socket *));
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struct tcpcb * tcp_close _P((register struct tcpcb *));
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void tcp_sockclosed _P((struct tcpcb *));
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int tcp_fconnect _P((struct socket *));
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void tcp_connect _P((struct socket *));
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int tcp_attach _P((struct socket *));
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u_int8_t tcp_tos _P((struct socket *));
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int tcp_emu _P((struct socket *, struct mbuf *));
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int tcp_ctl _P((struct socket *));
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struct tcpcb *tcp_drop(struct tcpcb *tp, int err);
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#ifdef USE_PPP
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#define MIN_MRU MINMRU
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#define MAX_MRU MAXMRU
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#else
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#define MIN_MRU 128
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#define MAX_MRU 16384
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#endif
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#ifndef _WIN32
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#define min(x,y) ((x) < (y) ? (x) : (y))
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#define max(x,y) ((x) > (y) ? (x) : (y))
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#endif
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#ifdef _WIN32
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#undef errno
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#define errno (WSAGetLastError())
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#endif
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#endif
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