IPNetwork Class Reference

Inheritance diagram for IPNetwork:

[legend]Collaboration diagram for IPNetwork:

[legend]List of all members.

Public Member Functions
	IPNetwork ()
int	ttl () const
int	noloopback_broken ()
int	setmttl (Socket, int)
int	setmloop (Socket, int)
int	command (int argc, const char *const *argv)
Socket	rchannel ()
Socket	schannel ()
int	send (u_char *buf, int len)
int	recv (u_char *buf, int len, sockaddr &from, double &)
in_addr &	laddr ()
in_addr &	dstaddr ()
int	add_membership (Socket, in_addr &grp)
int	drop_membership (Socket, in_addr &grp)
virtual int	recv (netpkt_handler callback, void *clientdata)
int	mode ()
Static Public Member Functions
int	bindsock (Socket, in_addr &, u_int16_t, sockaddr_in &)
int	connectsock (Socket, in_addr &, u_int16_t, sockaddr_in &)
int	rbufsize (Socket, int)
int	sbufsize (Socket, int)
int	nonblock (int fd)
int	parsemode (const char *)
char *	modename (int)
Protected Member Functions
void	reset (int reconfigure)
virtual int	open (int mode)
virtual void	reconfigure ()
int	close ()
Protected Attributes
in_addr	destaddr_
in_addr	localaddr_
int	mttl_
Socket	rsock_
Socket	ssock_
int	noloopback_broken_
int	loop_
time_t	last_reset_
int	mode_

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Constructor & Destructor Documentation

IPNetwork::IPNetwork (   )

Definition at line 178 of file net-ip.cc. References destaddr_, localaddr_, and NIDEBUG. : mttl_(0), rsock_(-1), ssock_(-1), noloopback_broken_(0), loop_(1) { localaddr_.s_addr = 0L; destaddr_.s_addr = 0L; NIDEBUG("IPNetwork: ctor\n"); }

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Member Function Documentation

int IPNetwork::add_membership (  Socket  , in_addr &  grp )

Definition at line 769 of file net-ip.cc. References NIDEBUG3. Referenced by UDPIPNetwork::add_membership(), and command(). { #if defined(IP_ADD_MEMBERSHIP) if (IN_CLASSD(ntohl(addr.s_addr))) { #ifdef notdef /* * Try to bind the multicast address as the socket * dest address. On many systems this won't work * so fall back to a destination of INADDR_ANY if * the first bind fails. */ sockaddr_in sin; memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_addr = addr; if (::bind(fd, (struct sockaddr *) &sin, sizeof(sin)) < 0) { sin.sin_addr.s_addr = INADDR_ANY; if (::bind(fd, (struct sockaddr *) &sin, sizeof(sin)) < 0) { fprintf(stderr, "IPNetwork(%s): add_membership: unable to bind to addr %s: %s\n", name(), inet_ntoa(sin.sin_addr), strerror(errno)); return (-1); } } #endif /* * XXX This is bogus multicast setup that really * shouldn't have to be done (group membership should be * implicit in the IP class D address, route should contain * ttl & no loopback flag, etc.). Steve Deering has promised * to fix this for the 4.4bsd release. We're all waiting * with bated breath. */ struct ip_mreq mr; mr.imr_multiaddr = addr; mr.imr_interface.s_addr = INADDR_ANY; if (::setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&mr, sizeof(mr)) < 0) { fprintf(stderr, "IPNetwork(%s): add_membership: unable to add membership for addr %s: %s\n", name(), inet_ntoa(addr), strerror(errno)); return (-1); } NIDEBUG3("IPNetwork(%s): add_membership for grp %s done\n", name(), inet_ntoa(addr)); return (0); } #else fprintf(stderr, "IPNetwork(%s): add_membership: host does not support IP multicast\n", name()); #endif NIDEBUG3("IPNetwork(%s): add_membership for grp %s failed\n", name(), inet_ntoa(addr)); return (-1); }

int IPNetwork::bindsock (  Socket  , in_addr &  , u_int16_t  , sockaddr_in &  )  [static]

Definition at line 861 of file net-ip.cc. Referenced by UDPIPNetwork::add_membership(), and UDPIPNetwork::bind(). { memset((char *)&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_port = port; sin.sin_addr = addr; return(::bind(s, (struct sockaddr *)&sin, sizeof(sin))); }

int IPNetwork::close (   )  [protected]

Definition at line 751 of file net-ip.cc. References rsock_, and ssock_. Referenced by command(). { if (ssock_ >= 0) { (void)::close(ssock_); ssock_ = -1; } if (rsock_ >= 0) { (void)::close(rsock_); rsock_ = -1; } return (0); }

int IPNetwork::command (  int  argc, const char *const *  argv )  [virtual]

Reimplemented from Network. Reimplemented in UDPIPNetwork. Definition at line 594 of file net-ip.cc. References add_membership(), close(), Network::command(), destaddr_, drop_membership(), localaddr_, LookupHostAddr(), Network::mode(), mttl_, open(), Network::parsemode(), rchannel(), schannel(), and setmloop(). Referenced by UDPIPNetwork::command(). { Tcl& tcl = Tcl::instance(); if (argc == 2) { if (strcmp(argv[1], "close") == 0) { close(); return (TCL_OK); } char* cp = tcl.result(); if (strcmp(argv[1], "destaddr") == 0) { strcpy(cp, inet_ntoa(destaddr_)); return (TCL_OK); } if (strcmp(argv[1], "localaddr") == 0) { strcpy(cp, inet_ntoa(localaddr_)); return (TCL_OK); } if (strcmp(argv[1], "mttl") == 0) { tcl.resultf("%d", mttl_); return (TCL_OK); } /* for backward compatability */ if (strcmp(argv[1], "ismulticast") == 0) { tcl.result(IN_CLASSD(ntohl(destaddr_.s_addr)) ? "1" : "0"); return (TCL_OK); } if (strcmp(argv[1], "addr") == 0) { strcpy(cp, inet_ntoa(destaddr_)); return (TCL_OK); } if (strcmp(argv[1], "ttl") == 0) { tcl.resultf("%d", mttl_); return (TCL_OK); } if (strcmp(argv[1], "interface") == 0) { strcpy(cp, inet_ntoa(localaddr_)); return (TCL_OK); } } else if (argc == 3) { if (strcmp(argv[1], "open") == 0) { int mode = parsemode(argv[2]); if (open(mode) < 0) return (TCL_ERROR); return (TCL_OK); } if (strcmp(argv[1], "add-membership") == 0) { in_addr addr; addr.s_addr = LookupHostAddr(argv[2]); if (add_membership(rchannel(), addr) < 0) tcl.result("0"); else tcl.result("1"); return (TCL_OK); } if (strcmp(argv[1], "drop-membership") == 0) { in_addr addr; addr.s_addr = LookupHostAddr(argv[2]); if (drop_membership(rchannel(), addr) < 0) tcl.result("0"); else tcl.result("1"); return (TCL_OK); } if (strcmp(argv[1], "loopback") == 0) { int val = atoi(argv[2]); if (strcmp(argv[2], "true") == 0) val = 1; else if (strcmp(argv[2], "false") == 0) val = 0; if (setmloop(schannel(), val) < 0) tcl.result("0"); else tcl.result("1"); return (TCL_OK); } } return (Network::command(argc, argv)); }

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int IPNetwork::connectsock (  Socket  , in_addr &  , u_int16_t  , sockaddr_in &  )  [static]

Definition at line 871 of file net-ip.cc. Referenced by UDPIPNetwork::bind(), UDPIPNetwork::connect(), and open(). { memset((char *)&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_port = port; sin.sin_addr = addr; return(::connect(s, (struct sockaddr *)&sin, sizeof(sin))); }

int IPNetwork::drop_membership (  Socket  , in_addr &  grp )

Definition at line 832 of file net-ip.cc. References NIDEBUG3. Referenced by command(). { #if defined(IP_DROP_MEMBERSHIP) if (IN_CLASSD(ntohl(addr.s_addr))) { struct ip_mreq mr; mr.imr_multiaddr = addr; mr.imr_interface.s_addr = INADDR_ANY; if (::setsockopt(fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (char *)&mr, sizeof(mr)) < 0) { fprintf(stderr, "IPNetwork(%s): drop_membership: unable to drop membership for addr %s: %s\n", name(), inet_ntoa(addr), strerror(errno)); return (-1); } NIDEBUG3("IPNetwork(%s): drop_membership for grp %s done\n", name(), inet_ntoa(addr)); return (0); } #else fprintf(stderr, "IPNetwork(%s): drop_membership: host does not support IP multicast\n", name()); #endif NIDEBUG3("IPNetwork(%s): drop_membership for grp %s failed\n", name(), inet_ntoa(addr)); return (-1); }

in_addr& IPNetwork::dstaddr (   )  [inline]

Definition at line 114 of file net-ip.cc. References destaddr_. { return (destaddr_); }

in_addr& IPNetwork::laddr (   )  [inline]

Definition at line 113 of file net-ip.cc. References localaddr_. { return (localaddr_); }

int Network::mode (   )  [inline, inherited]

Definition at line 71 of file net.h. References Network::mode_. Referenced by PcapFileNetwork::command(), PcapLiveNetwork::command(), command(), TapAgent::linknet(), TCPTapAgent::recvpkt(), TapAgent::recvpkt(), IPTapAgent::recvpkt(), TCPTapAgent::sendpkt(), TapAgent::sendpkt(), and IPTapAgent::sendpkt(). { return mode_; }

char * Network::modename (  int   )  [static, inherited]

Definition at line 154 of file net.cc. Referenced by Network::command(). { switch (mode) { case O_RDONLY: return ("readonly"); case O_WRONLY: return ("writeonly"); case O_RDWR: return ("readwrite"); } return ("unknown"); }

int IPNetwork::noloopback_broken (   )  [inline]

Definition at line 101 of file net-ip.cc. References noloopback_broken_. { // no loopback filter? return (noloopback_broken_); }

int Network::nonblock (  int  fd  )  [static, inherited]

Definition at line 111 of file net.cc. Referenced by UDPIPNetwork::open(). { #ifdef WIN32 u_long flag = 1; if (ioctlsocket(fd, FIONBIO, &flag) == -1) { fprintf(stderr, "Network::nonblock(): ioctlsocket: FIONBIO: %lu\n", GetLastError()); return -1; } #else int flags; if ((flags = fcntl(fd, F_GETFL, 0)) < 0) { perror("Network::nonblock(): fcntl"); return (-1); } #if defined(hpux) || defined(__hpux) flags |= O_NONBLOCK; #else flags |= O_NONBLOCK|O_NDELAY; #endif if (fcntl(fd, F_SETFL, flags) == -1) { perror("Network::nonblock(): fcntl: F_SETFL"); return -1; } #endif return 0; }

int IPNetwork::open (  int  mode  )  [protected, virtual]

Reimplemented in UDPIPNetwork. Definition at line 702 of file net-ip.cc. References connectsock(), Network::mode_, NIDEBUG5, rsock_, Socket, and ssock_. Referenced by command(), and reset(). { // obtain a raw socket we can use to send ip datagrams Socket fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); if (fd < 0) { perror("socket(RAW)"); if (::getuid() != 0 && ::geteuid() != 0) { fprintf(stderr, "IPNetwork(%s): open: use of the Network/IP object requires super-user privs\n", name()); } return (-1); } // turn on HDRINCL option (we will be writing IP header) // in FreeBSD 2.2.5 (and possibly others), the IP id field // is set by the kernel routine rip_output() // only if it is non-zero, so we should be ok. int one = 1; if (::setsockopt(fd, IPPROTO_IP, IP_HDRINCL, &one, sizeof(one)) < 0) { fprintf(stderr, "IPNetwork(%s): open: unable to turn on IP_HDRINCL: %s\n", name(), strerror(errno)); return (-1); } #ifndef __linux__ // sort of curious, but do a connect() even though we have // HDRINCL on. Otherwise, we get ENOTCONN when doing a send() sockaddr_in sin; in_addr ia = { INADDR_ANY }; if (connectsock(fd, ia, 0, sin) < 0) { fprintf(stderr, "IPNetwork(%s): open: unable to connect : %s\n", name(), strerror(errno)); } #endif rsock_ = ssock_ = fd; mode_ = mode; NIDEBUG5("IPNetwork(%s): opened with mode %d, rsock_:%d, ssock_:%d\n", name(), mode_, rsock_, ssock_); return 0; }

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int Network::parsemode (  const char *   )  [static, inherited]

Definition at line 141 of file net.cc. Referenced by PcapFileNetwork::command(), PcapLiveNetwork::command(), and command(). { if (strcmp(mname, "readonly") == 0) { return (O_RDONLY); } else if (strcmp(mname, "readwrite") == 0) { return (O_RDWR); } else if (strcmp(mname, "writeonly") == 0) { return (O_WRONLY); } return (::atoi(mname)); }

int IPNetwork::rbufsize (  Socket  , int  )  [static]

Definition at line 886 of file net-ip.cc. Referenced by UDPIPNetwork::open(). { return(::setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&cnt, sizeof(cnt))); }

Socket IPNetwork::rchannel (   )  [inline, virtual]

Implements Network. Definition at line 107 of file net-ip.cc. References rsock_, and Socket. Referenced by command(). { return(rsock_); } // virtual in Network

void IPNetwork::reconfigure (   )  [protected, virtual]

Reimplemented in UDPIPNetwork. Definition at line 950 of file net-ip.cc. Referenced by reset(). { }

virtual int Network::recv (  netpkt_handler  callback, void *  clientdata )  [inline, virtual, inherited]

Reimplemented in PcapNetwork. Definition at line 62 of file net.h. { Tcl::instance().evalf("%s info class", name()); fprintf( stderr, "Callback Interface to receiving packets" " unsupported in class %s\n", Tcl::instance().result() ); return 0; } // callback called for every packet

int IPNetwork::recv (  u_char *  buf, int  len, sockaddr &  from, double &  )  [virtual]

Implements Network. Reimplemented in UDPIPNetwork. Definition at line 547 of file net-ip.cc. References abort(), Scheduler::clock(), Scheduler::instance(), len, Network::mode_, rsock_, socklen_t, and ts. { if (mode_ == O_WRONLY) { fprintf(stderr, "IPNetwork(%s) recv while in writeonly mode!\n", name()); abort(); } int fromlen = sizeof(sa); int cc = ::recvfrom(rsock_, (char*)buf, len, 0, &sa, (socklen_t*)&fromlen); if (cc < 0) { if (errno != EWOULDBLOCK) perror("recvfrom"); return (-1); } ts = Scheduler::instance().clock(); return (cc); }

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void IPNetwork::reset (  int  reconfigure  )  [protected]

Definition at line 921 of file net-ip.cc. References last_reset_, Network::mode_, NIDEBUG2, open(), reconfigure(), rsock_, and ssock_. Referenced by UDPIPNetwork::send(). { time_t t = time(0); int d = int(t - last_reset_); NIDEBUG2("IPNetwork(%s): reset\n", name()); if (d > 3) { // Steve: why? last_reset_ = t; if (ssock_ >= 0) (void)::close(ssock_); if (rsock_ >= 0) (void)::close(rsock_); if (open(mode_) < 0) { fprintf(stderr, "IPNetwork(%s): couldn't reset\n", name()); mode_ = -1; return; } if (restart) (void) reconfigure(); } }

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int IPNetwork::sbufsize (  Socket  , int  )  [static]

Definition at line 880 of file net-ip.cc. Referenced by UDPIPNetwork::open(). { return(::setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&cnt, sizeof(cnt))); }

Socket IPNetwork::schannel (   )  [inline, virtual]

Implements Network. Definition at line 108 of file net-ip.cc. References Socket, and ssock_. Referenced by command(), and UDPIPNetwork::send(). { return(ssock_); } // virtual in Network

int IPNetwork::send (  u_char *  buf, int  len )  [virtual]

Implements Network. Reimplemented in UDPIPNetwork. Definition at line 573 of file net-ip.cc. References len, and ssock_. { struct ip *ip = (struct ip*) buf; #ifdef __linux__ // For raw sockets on linux the send does not work, // all packets show up only on the loopback device and are not routed // to the correct host. Using sendto on a closed socket solves this problem ip->ip_len = (ip->ip_len); ip->ip_off = (ip->ip_off); sockaddr_in sin; memset((char *)&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_addr = ip->ip_dst; return (::sendto(ssock_, (char*)buf, len, 0,(sockaddr *) &sin,sizeof(sin))); #else ip->ip_len = ntohs(ip->ip_len); ip->ip_off = ntohs(ip->ip_off); return (::send(ssock_, (char*)buf, len, 0)); #endif }

int IPNetwork::setmloop (  Socket  , int  )

Definition at line 892 of file net-ip.cc. References loop_, and noloopback_broken_. Referenced by command(). { #ifdef IP_MULTICAST_LOOP u_char c = loop; if (::setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &c, sizeof(c)) < 0) { /* * If we cannot turn off loopback (Like on the * Microsoft TCP/IP stack), then declare this * option broken so that our packets can be * filtered on the recv path. */ if (c != loop) { noloopback_broken_ = 1; loop_ = c; } return (-1); } noloopback_broken_ = 0; #else fprintf(stderr, "IPNetwork(%s): msetloop: host does not support IP multicast\n", name()); #endif loop_ = c; return (0); }

int IPNetwork::setmttl (  Socket  , int  )

Definition at line 675 of file net-ip.cc. { /* set the multicast TTL */ #ifdef WIN32 u_int t = ttl; #else u_char t = ttl; #endif t = (ttl > 255) ? 255 : (ttl < 0) ? 0 : ttl; if (::setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, (char*)&t, sizeof(t)) < 0) { fprintf(stderr, "IPNetwork(%s): couldn't set multicast ttl to %d\n", name(), t); return (-1); } return (0); }

int IPNetwork::ttl (   )  const [inline]

Definition at line 100 of file net-ip.cc. References mttl_. { return (mttl_); } // current mcast ttl

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Member Data Documentation

in_addr IPNetwork::destaddr_ [protected]

Definition at line 127 of file net-ip.cc. Referenced by command(), UDPIPNetwork::connect(), dstaddr(), and IPNetwork().

time_t IPNetwork::last_reset_ [protected]

Definition at line 141 of file net-ip.cc. Referenced by UDPIPNetwork::connect(), and reset().

in_addr IPNetwork::localaddr_ [protected]

Definition at line 128 of file net-ip.cc. Referenced by UDPIPNetwork::bind(), command(), IPNetwork(), laddr(), and UDPIPNetwork::recv().

int IPNetwork::loop_ [protected]

Definition at line 133 of file net-ip.cc. Referenced by UDPIPNetwork::recv(), and setmloop().

int Network::mode_ [protected, inherited]

Definition at line 76 of file net.h. Referenced by UDPIPNetwork::bind(), Network::command(), UDPIPNetwork::connect(), Network::mode(), Network::Network(), PcapFileNetwork::open(), PcapLiveNetwork::open(), open(), UDPIPNetwork::open(), recv(), and reset().

int IPNetwork::mttl_ [protected]

Definition at line 129 of file net-ip.cc. Referenced by command(), and ttl().

int IPNetwork::noloopback_broken_ [protected]

Definition at line 132 of file net-ip.cc. Referenced by noloopback_broken(), UDPIPNetwork::recv(), and setmloop().

Socket IPNetwork::rsock_ [protected]

Definition at line 130 of file net-ip.cc. Referenced by UDPIPNetwork::bind(), close(), open(), UDPIPNetwork::open(), rchannel(), recv(), UDPIPNetwork::recv(), and reset().

Socket IPNetwork::ssock_ [protected]

Definition at line 131 of file net-ip.cc. Referenced by close(), UDPIPNetwork::connect(), open(), UDPIPNetwork::open(), reset(), schannel(), and send().

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The documentation for this class was generated from the following file:

• net-ip.cc

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