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Indicate.Dell-XPS Laptops Color and Correct Street AddressIndicate.Dell-XPS Laptops Color and Correct Street Address ifi_flags contains the device flags, see netdevice(7); ifi_index IPv6 addresses. They contain an ifaddrmsg structure, optionally The header file is only required for libc4 or earlier. only passed when the MSG_OOB flag is set during receiving. descriptor. SOCK_PACKET is an obsolete socket type to receive raw packets directly and to do other socket operations. For more information see their streams. An out-of-band data transmission mechanism may be rmem_default followed by rtaddr routing attributes. 4.4BSD, POSIX.1-2001. socket() appeared in 4.2BSD. It is generally VERSIONS application about events via a SIGIO signal. For that the O_ASYNC flag Obsolete and should not be used in new programs; see packet(7). my $local_sock_addr = $c->remote_local; include: unsigned char rtm_src_len; /* Length of destination */ connection. socketpair(2) returns two connected anonymous sockets NUD_STALE an expired cache entry /proc/sys/net/core/* files or with the sysctl(2) interface. socket. Normally only a single protocol exists to support a particular can be overridden. rtm_type Route type value is returned by getsockopt(2). The default value is set by SO_PRIORITY An alternative to poll(2) and select(2) is to let the kernel inform the Get the current process or process group that receives SIGIO or concept in 2.0. In Linux 2.2 these messages support IPv4 and FIOASYNC unsigned int ifi_change; /* change mask */ later program needs to set the SO_REUSEADDR option. Typically this These functions are used by the user process to send or receive packets Using this socket option, a privileged (CAP_NET_ADMIN) process RT_SCOPE_HOST route on the local host Valid fcntl(2) operations: until SO_RCVLOWAT bytes are available. struct linger { }; SO_PASSCRED RTN_UNICAST a gateway or direct route int ifi_index; /* Interface index */ user in this call. See cmsg(3) for details on control messages. in the background. field: RT_SCOPE_UNIVERSE global route structure. struct ifaddrmsg { SO_TIMESTAMP RTA_METRICS int Route metric The socket has the indicated type, which specifies the communication interface. The BSD compatible sockets are the uniform interface RTN_THROW continue routing lookup in another table __u8 ndm_type; DESCRIPTION See fcntl(2) for more information. a getsockopt(2). RTPROT_BOOT during boot SO_RCVBUF Add, remove or receive information about a traffic filter. RTN_LOCAL a local interface route Return the credentials of the foreign process connected to this must be set on a socket file descriptor via fcntl(2) and a valid signal indicates that this is a listening socket. Can only be read supported API. POSIX.1-2001 does not require the inclusion of , and this Provides a sequenced, reliable, two-way connection-based data header file is not required on Linux. However, some historical (BSD) ordering. select(2), poll(2), epoll_wait(2), etc. description of the project, and information about reporting bugs, can |Read/Write | POLLERR | An asynchronous error occurred. | rtm_scope is the distance to the destination: socket(2) creates a socket, connect(2) connects a socket to a remote Attributes The rtaddr struct has the following meanings for the rta_type BUGS Enable or disable the receiving of the SCM_CREDENTIALS control TCA_UNSPEC - unspecified accept(2), bind(2), connect(2), fcntl(2), getpeername(2), Indicates that the rules used in validating addresses supplied mode of the socket. Asynchronous I/O mode means that the SIGIO SO_TYPE unsigned char ifi_family; /* AF_UNSPEC */ Routing attributes struct timeval. This ioctl should only be used if the socket except rtm_table and rtm_protocol 0 is the wildcard. flag. This differs from some implementations (e.g., FreeBSD) where only the Sets or gets the maximum socket receive buffer in bytes. The IFA_UNSPEC - unspecified. SO_REUSEADDR Maximum number of packets in the global input queue. be found at http://www.kernel.org/doc/man-pages/. respective manual pages. though this usage is not documented here, and for communication with flag on a socket send(2) operation. Expects an integer boolean unsigned char rtm_dst_len; /* Length of source */ socket(2) for more information on families and types. SO_SNDTIMEO are supported since Linux 2.3.41. Earlier, timeouts were IFLA_QDISC asciiz string Queueing discipline. user may set by using the SO_RCVBUF socket option. is sent when an I/O event occurs. It is possible to use poll(2) or a per-socket error queue to retrieve detailed information about the IFLA_LINK int Link type. }; RT_TABLE_LOCAL the local table ip(7), this also sets the IP type-of-service (TOS) field for Return a struct timeval with the receive timestamp of the last Linux 2.2. The sysctls are new in Linux 2.2. SO_RCVTIMEO and "An Introductory 4.3BSD Interprocess Communication Tutorial" is process group that receives the I/O and asynchronous notification of use Apache2::Connection (); $ret = $addr1->equal($addr2); socket() creates an endpoint for communication and returns a obj: $addr1 ( "APR::SockAddr object" ) NUD_NOARP a device with no destination cache the wmem_max sysctl. The minimum (doubled) value for this RTM_NEWROUTE, RTM_DELROUTE, RTM_GETROUTE unsigned char rtm_family; /* Address family of route */ The same as the SIOCGPGRP ioctl(2). Add, delete or retrieve a routing rule. Carries a struct rtmsg RTA_FLOW buffer. user may set by using the SO_SNDBUF socket option. in a protocol-specific manner if the other end is still alive. A +-----------+-----------+--------------------------------------------+ unsigned int ifi_flags; /* Device flags */ can perform the same task as SO_RCVBUF, but the rmem_max limit An fcntl(2) F_SETOWN operation can be used to specify a process or RTA_SRC protocol address Route source address. transmission path for datagrams of fixed maximum length; a unsigned char tcm_family; rtm_table specifies the routing table can perform the same task as SO_SNDBUF, but the wmem_max limit configure the token bucket filter used to load limit warning SO_RCVLOWAT and SO_SNDLOWAT RT_TABLE_UNSPEC an unspecified routing table The other APR socket address. SO_BINDTODEVICE be specified as 0. However, it is possible that many protocols may SO_RCVBUFFORCE (since Linux 2.6.14) Sockets of type SOCK_STREAM are full-duplex byte streams, similar to RTPROT_KERNEL by the kernel signal or the signal set with F_SETSIG is raised when a new I/O received with recvfrom(2), which returns the next datagram along with |Read | POLLIN | New data arrived. | overhead) when it is set using setsockopt(2), and this doubled example, SOCK_SEQPACKET is not implemented for AF_INET. One of the APR socket addresses. message. The timestamp control message is sent with level effect for system calls that perform socket I/O (e.g., read(2), tag the source of a routing information or to distinguish reached. completed a close(2) may be performed. Out-of-band data may also be local autonomous system since: subject to change | | POLLOUT | | handler for SIGIO must be installed via sigaction(2). See the Signals occurred on. An alternative (in Linux 2.2) is to set a realtime signal mod_perl 2.0 documentation. --------------------------------------------- PF_APPLETALK Appletalk ddp(7) META: Autogenerated - needs to be reviewed/completed data is not lost or duplicated. If a piece of data for which the peer RTM_NEWLINK, RTM_DELLINK, RTM_GETLINK exist, in which case a particular protocol must be specified in this return only the amount of data requested, and any data remaining in the contains the default setting in bytes of the socket send buffer. data is available. The argument is a pointer to a pid_t. If These messages contain an rtmsg structure with an optional available to the user. RTN_ANYCAST a local broadcast route (sent as a effect on stream-oriented sockets. FIOGETOWN These attributes should be only manipulated using the RTA_* macros or RTN_UNSPEC unknown route struct ndmsg { SO_BINDTODEVICE was introduced in Linux 2.0.30. SO_PASSCRED is new in }; __u32 tcm_handle; /* Qdisc handle */ value is returned by getsockopt(2). The default value is set by be in a connected state before any data may be sent or received on it. NDA_DST a neighbor cache n/w layer destination address other methods which aren't tested at the moment and therefore their API rtm_protocol Route origin. These messages contain a struct tcmsg as described above. fixed maximum length). semantics. Currently defined types are: based on netlink messages, see netlink(7) for more information. RTA_MULTIPATH RTA_PROTOINFO getsockopt(2) with the socket level set to SOL_SOCKET for all sockets: layer (including System V variants). +-----------+-----------+--------------------------------------------+ my ($remoteport, $remoteip) = sockaddr_in(getpeername($remote_sock)); NUD_PERMANENT a static entry files. These operations can be accessed using ioctl(2): wmem_default my ($serverport, $serverip) = sockaddr_in(getpeername($local_sock)); The communications protocols which implement a SOCK_STREAM ensure that Enable sending of keep-alive messages on connection-oriented unsigned short rta_type; /* Type of option */ The implementation does not support the specified address send(2), sendto(2), and sendmsg(2) send data over a socket, and SIGURG signals, or 0 when none is set. RTN_PROHIBIT a packet rejection route socket), the condition that caused the SIGIO may have already unexpectedly. This operation may also be used to set the process or IFA_LABEL asciiz string name of the interface Don't send via a gateway, only send to directly connected hosts. option is 2048. RT_SCOPE_NOWHERE destination doesn't exist RTN_BROADCAST a local broadcast route (sent as a nda_cacheinfo header follows IFA_BROADCAST raw protocol address broadcast address. interface. These messages contain an ifinfomsg structure Ioctls |Exception | POLLPRI | Urgent data arrived. SIGURG is sent then. | then it is not possible to bind to this port for any local be read with getsockopt(2). getsockopt(2) are used to set and get options, respectively. If you are familiar with how perl's "Socket" works: Linux will only allow port re-use with the SO_REUSEADDR option when The same effect can be achieved by setting the MSG_DONTROUTE This page is part of release 2.77 of the Linux man-pages project. A SIOCSPGRP | | | connection-oriented protocols). When the | The operation of sockets is controlled by socket level options. These COLOPHON The values between RT_SCOPE_UNIVERSE and RT_SCOPE_SITE are TCA_STATS struct tc_stats Qdisc statistics. struct tcmsg as described above. initialized to 1. SO_SNDLOWAT is not changeable on Linux kernel doubles this value (to allow space for bookkeeping specified in the passed interface name. If the name is an empty "equal" AF_INET6), ifa_prefixlen is the length of the address mask of the rmem_default sysctl and the maximum allowed value is set by my $serverport = $c->local_addr->port; NUD_PROBE a cache entry that is currently reprobed __u32 ndm_used; SOCK_RDM unsigned char rtm_type; /* See below */ netdev_max_backlog address, listen(2) tells the socket that new connections shall be RT_SCOPE_SITE interior route in the SO_LINGER PF_NETLINK Kernel user interface device netlink(7) int tcm_ifindex; /* interface index */ may only choose itself or its own process group to receive iovecs per socket. obj: $sock_addr ( "APR::SockAddr object" ) correspondents named in sendto(2) calls. Datagrams are generally +-----------+-----------+--------------------------------------------+ specified the MSG_NOSIGNAL flag. depending on the selected device queueing discipline. For rmem_max CONFORMING TO received for a UDP socket will not be passed to the user An example of the use of socket() is shown in getaddrinfo(3). RT_SCOPE_LINK route on this link message_cost and message_burst my $serverip = $c->local_addr->ip_get; SO_SNDBUFFORCE (since Linux 2.6.14) | I/O events | protocol is denied. -------------------------------------------------------------- __u8 ndm_flags; /* Flags */ -------------------------------------------------------------- SO_TIMESTAMP was not set, or it fails if no such packet has been RTM_NEWADDR, RTM_DELADDR, RTM_GETADDR "APR::SockAddr" provides an access to a socket address structure IFA_CACHEINFO struct ifa_cacheinfo Address information. RTM_NEWNEIGH, RTM_DELNEIGH, RTM_GETNEIGH error, -1 is returned, and errno is set appropriately. contact the the mod_perl development mailing list so we can help each unsigned char ifa_flags; /* Address flags */ bind(2) to the port and in the program that wants to re-use the port. SO_ACCEPTCONN data is available. A subsequent read from the socket will block user-space programs. Network routes, ip addresses, link parameters, been sent or received, the return value of that function will be getsockname(2), getsockopt(2), ioctl(2), listen(2), read(2), recv(2), CAP_NET_ADMIN capability or an effective user ID of 0. unicast) IFNAMSIZ. If a socket is bound to an interface, only packets SOCK_UUCP is not implemented yet. Gets the socket type as an integer (like SOCK_STREAM). Can only COLOPHON +-----------+-----------+--------------------------------------------+ SOL_SOCKET and the cmsg_data field is a struct timeval ifa_family is the address family type (currently AF_INET or RTPROT_STATIC by the administrator select(2) in the signal handler to find out which socket the event Get and clear the pending socket error. Only valid as a families. However, already the BSD man page promises: "The protocol kernel doubles this value (to allow space for bookkeeping RT_TABLE_DEFAULT the default table indicates that this is not a listening socket, the value 1 from the device driver. Use packet(7) instead. portable to/from non-BSD systems supporting clones of the BSD socket family. |Read | POLLHUP | A disconnection request has been initiated | mysocket = socket(int socket_family, int socket_type, int protocol); Seeking, or calling pread(2) or pwrite(2) with a nonzero position is unsigned char rtm_table; /* Routing table ID */ unsigned char ifa_prefixlen; /* Prefixlength of address */ recv(2), recvfrom(2), recvmsg(2) receive data from a socket. poll(2) Signals my $port = $sock_addr->port; |Write | POLLOUT | Socket has enough send buffer space for | When the socket is closed as part of exit(2), it always lingers select(2), send(2), shutdown(2), socketpair(2), write(2), error. The parameter is a struct timeval. If an input or PF_AX25 Amateur radio AX.25 protocol ret: $ret ( integer ) NDA_LLADDR a neighbor cache link layer address SO_DEBUG struct rtattr { arriving packet will be discarded. Also all message boundaries in fields. __u32 ndm_confirmed; marked to accept connections with listen(2). The value 0 NOTES sockets (use normal bind(8) there). mod_perl 2.0 and its core modules are copyrighted under The Apache struct ifinfomsg { the address if defined for the family (like for IPv4), ifa_scope unsigned char ifa_scope; /* Address scope */ (setsockopt(2) fails with the error ENOPROTOOPT). SO_RCVLOWAT If the rta_type field is NDA_CACHEINFO then a struct Values larger than RTPROT_STATIC are not interpreted by the to when an asynchronous I/O operation has finished or urgent NTF_PROXY a proxy arp entry recv(2). implementations required this header file, and portable applications the wire. for raw sockets with this option, but that was removed in Linux "APR::SockAddr" also provides auto-generated Perl interface for a few NTF_ROUTER an IPv6 router int l_onoff; /* linger active */ event occurs. O_NONBLOCK flag on a socket file descriptor using fcntl(2). Then all other take the steps necessary to shift the method to an officially returns the timestamp of the last packet that was received while "port" exit. SOCK_SEQPACKET sockets employ the same system calls as RTA_UNSPEC - ignored. select(2). 2.2. reprinted in UNIX Programmer���s Supplementary Documents Volume 1. |Read/Write | POLLHUP | The other end has shut down one direction. | ndm_state is a bit mask of the following states: Get the IP address of the socket Messages __u32 ndm_refcnt; implemented) IFLA_UNSPEC - unspecified. Sets or gets the maximum socket send buffer in bytes. The PF_UNIX, PF_INET, etc., while AF_UNIX etc. are used for address }; Specify the minimum number of bytes in the buffer until the ENFILE The system limit on the total number of open files has been to send packets to a broadcast address. This option has no and select(2) wait for arriving data or a readiness to send data. In TCA_RATE struct tc_estimator Rate limit. SOCK_STREAM sockets. The only difference is that read(2) calls will Fill these values in! API PF_PACKET Low level packet interface packet(7) The protocol specifies a particular protocol to be used with the string or the option length is zero, the socket device binding The protocol type or the specified protocol is not supported A connection to another socket is created with a connect(2) call. Once These socket options can be set by using setsockopt(2) and read with system call. __u32 tcm_parent; /* Parent qdisc */ unsigned char rtm_protocol; /* Routing protocol; see below */ Copyright TCA_XSTATS qdisc specific Module-specific statistics. kernel, they are just for user information. They may be used to rta_type value type description to be non-blocking. If the timeout is set to zero (the default) indicating the reception time of the last packet passed to the description of the project, and information about reporting bugs, can error = ioctl(ip_socket, ioctl_type, &value_result); with getsockopt(2). setting rtm_dst_len and rtm_src_len to 0 means you get all struct nda_cacheinfo { allowed. For more information see the appropriate include Enable BSD bug-to-bug compatibility. This is used by the UDP the process should wait again because Linux will resend the signal Provides sequenced, reliable, two-way, connection-based byte int l_linger; /* how many seconds to linger for */ SOCK_STREAM particularly AF_INET sockets. It is not supported for packet use and should be always set to 0xFFFFFFFF. reasonable length of time, then the connection is considered to be pipes. They do not preserve record boundaries. A stream socket must associated with an interface. In Linux 2.2 an interface can +-----------+-----------+--------------------------------------------+ contains the maximum socket send buffer size in bytes which a classifiers may all be controlled through NETLINK_ROUTE sockets. It is In addition various other qdisc module specific attributes are supported. IFLA_ADDRESS hardware address interface L2 address The CONFIG_FILTER socket options SO_ATTACH_FILTER and SO_DETACH_FILTER sockets. Expects an integer boolean flag. used to set or get socket layer or protocol options. ioctl(2) can be |Read | POLLIN | A connection setup has been completed (for | use APR::SockAddr (); can be overridden. RTA_IIF int Input interface index. ------------------------------------------------------------------ Some packages, like util-linux, claim portability to all Linux versions and libraries. They certainly need this header file. IFLA_STATS see below Interface Statistics. is the address scope, ifa_index is the interface index of the Provides a reliable datagram layer that does not guarantee unsigned short rta_len; /* Length of option */ designed to always set this option. RT_TABLE_DEFAULT. SOCK_SEQPACKET PF_ATMPVC Access to raw ATM PVCs Add, remove or get a queueing discipline. The message contains is changeable only since Linux 2.4. The select(2) and poll(2) SIOCGPGRP unsigned char rtm_tos; /* TOS filter */ "APR::SockAddr" provides the following functions and/or methods: header: is the unique interface index, ifi_change is reserved for future The same as the SIOCSPGRP ioctl(2). between the user process and the network protocol stacks in the kernel. __u32 tcm_info; this option was set both in the previous program that performed a interface), IFA_F_PERMANENT for a permanent address set by the The return value will be non-zero if the addresses are equivalent. PF_IPX, PF_PACKET and socket types like SOCK_STREAM or SOCK_DGRAM. See consumer is required to read an entire packet with each input | | | writing new data. | ----------------------------------------------------------- the socket. The next operation on this socket will return the error Other errors may be generated by the underlying protocol modules. since: 2.0.00 SO_SNDBUF SOCK_DGRAM and SOCK_RAW sockets allow sending of datagrams to |Read/Write | POLLIN| | An outgoing connect(2) finished. | TCA_KIND asciiz string Name of queueing discipline NDA_UNSPEC unknown type error. The user can then wait for various events via poll(2) or EAFNOSUPPORT $port = $sock_addr->port(); difference is invisible, since, for example, a server program is unsigned char ndm_family; not supported on sockets. SO_BSDCOMPAT neighbor setups, queueing disciplines, traffic classes and packet When writing onto a connection-oriented socket that has been shut down socket type within a given protocol family, in which case protocol can RTM_F_EQUALIZE a multipath equalizer (not yet implemented) operations that would block will (usually) return with EAGAIN returns immediately and the closing is done in the background. SO_RCVTIMEO and SO_SNDTIMEO Set or get the broadcast flag. When enabled, datagram sockets later. +-----------+-----------+--------------------------------------------+ synonymous with the use of fcntl(2) to set the O_ASYNC flag.) (currently unused) received, (i.e., ioctl(2) returns -1 with errno set to ENOENT). getsockopt(2), setsockopt(2), socket(2), capabilities(7), ddp(7), (only implemented for a few local families like PF_UNIX) See if the IP addresses in two APR socket addresses are equivalent. PF_INET sockets this means that a socket may bind, except when Enable or disable the receiving of the SO_TIMESTAMP control program. In later kernel versions, support for this option has When the network signals an error condition to the protocol module Add, remove or receive information about an IP address requires the CAP_NET_ADMIN capability. are probably wise to include it. RTM_NEWTCLASS, RTM_DELTCLASS, RTM_GETTCLASS "ip_get" system calls currently do not respect the SO_RCVLOWAT setting on The value type for IFLA_STATS is struct net_device_stats. unsigned int rtm_flags; +-----------+-----------+--------------------------------------------+ Description SO_BROADCAST and EPIPE is returned. The signal is not sent when the write call SO_ERROR Rtnetlink consists of these message types (in addition to standard receive packets sent to a broadcast address and they are allowed NUD_REACHABLE a confirmed working cache entry or the linger timeout has been reached. Otherwise, the call +-----------+-----------+--------------------------------------------+ arg1: $addr2 ( "APR::SockAddr object" ) obj: $sock_addr ( "APR::SockAddr object" ) received from that particular interface are processed by the protocol module in Linux 2.0 and 2.2. If enabled ICMP errors SEE ALSO __u16 ndm_state; /* State */ This page is part of release 2.77 of the Linux man-pages project. A IFA_ANYCAST raw protocol address anycast address standards use AF_* everywhere. those that were in effect at the time of the call to connect(2) Appropriate logic is present for comparing IPv4-mapped IPv6 addresses unsigned short ifi_type; /* Device type */ SO_OOBINLINE It is possible to do non-blocking I/O on sockets by setting the and the timeout has been reached then -1 is returned with errno Programmer���s Supplementary Documents Volume 1. +-----------+-----------+--------------------------------------------+ | | | by the other end. | wmem_max word of IFA_F_SECONDARY for secondary address (old alias Change the O_ASYNC flag to enable or disable asynchronous I/O addition, the standard I/O operations like write(2), writev(2), Create, remove or get information about a specific network messages caused by external network events. SOCK_PACKET IFA_LOCAL raw protocol address local address IFLA_IFNAME asciiz string Device name. |Event | Poll flag | Occurrence | rta_type value type description Set the process or process group to send SIGIO or SIGURG signals transmitted as described in send(2) and received as described in (e.g., using a ICMP message for IP) the pending error flag is set for socket address, the bind(2) function binds a socket to a local socket unsigned char rtm_scope; /* See below */ getprotoent(3) on how to map protocol name strings to protocol numbers. Add, remove or get a traffic class. These messages contain a The user may assign arbitrary values between RT_TABLE_UNSPEC and RTPROT_UNSPEC unknown terminated interface name string with the maximum size of /* Data follows */ contains the maximum socket receive buffer size in bytes which a generates a kernel warning (printk()) if a program uses this Maximum length of ancillary data and user control data like the disappeared when the process reacts to the signal. If this happens, +-----------+-----------+--------------------------------------------+ duplex socket connection. When requested with the FIOSETOWN fcntl(2) or SIOCSPGRP ioctl(2), SIGIO ret: $ip ( string ) PF_UNIX, PF_LOCAL Local communication unix(7) Name Purpose Man page with the ID of the absolute value of the argument. The process with IPv4 addresses. EMFILE Process file table overflow. this socket. Linux uses this value to order the networking (operation should be retried later); connect(2) will return EINPROGRESS RTM_NEWTFILTER, RTM_DELTFILTER, RTM_GETTFILTER EPROTONOSUPPORT struct tcmsg { option. Linux 2.0 also enabled BSD bug-to-bug compatibility rta_type value type Description RTA_CACHEINFO | | | socket is written SIGPIPE is also sent. | process group to receive a SIGURG signal when the out-of-band data "BSD Interprocess Communication Tutorial" is reprinted in UNIX EINVAL Unknown protocol, or protocol family not available. arrives or SIGPIPE signal when a SOCK_STREAM connection breaks protocol has buffer space cannot be successfully transmitted within a Create, remove or receive information about a network route. are not documented. The suggested interface to use them is via the The protocol modules are grouped into protocol families like PF_INET, BUGS PF_INET IPv4 Internet protocols ip(7) getprotoent(3), ip(7), socket(7), tcp(7), udp(7), unix(7) within this domain. Socket Layer Functions SEE ALSO using socketpair(2); see unix(7). The returned credentials are ENOBUFS or ENOMEM RTM_F_CLONED route is cloned from another route Unsupported API SOCK_DGRAM optmem_max be found at http://www.kernel.org/doc/man-pages/. RTM_F_NOTIFY if the route changes, notify the user via Attributes | | | connection-oriented sockets) | the routing daemon identifiers which are already assigned. the user on receiving (SO_RCVLOWAT). These two values are SYNOPSIS options (random header changing, skipping of the broadcast flag) On success, a file descriptor for the new socket is returned. On Returns a value indicating whether or not this socket has been accepted, and accept(2) is used to get a new socket with a new incoming Enable socket debugging. Only allowed for processes with the RTPROT_REDIRECT by an ICMP redirect into the receive data stream. Otherwise out-of-band data is RTA_OIF int Output interface index. PF_IPX IPX - Novell protocols recvmsg(2), send(2), sendmsg(2)); timeouts have no effect for a struct tcmsg and may be followed by a series of attributes. sockets and PF_UNIX stream and datagram socket pairs created returns the remote socket address. getsockopt(2) and setsockopt(2) are rtnetlink the argument is negative, send the signals to the process group socket layer will pass the data to the protocol (SO_SNDLOWAT) or PF_INET6 IPv6 Internet protocols ipv6(7) use Socket 'sockaddr_in'; NUD_INCOMPLETE a currently resolving cache entry close(2) is used to close a socket. shutdown(2) closes parts of a full socket. Note that this only works for some socket types, followed by a series of rtattr structures. }; discussion below. address. Argument is an integer boolean flag. since: 2.0.00 getsockname(2) returns the local socket address and getpeername(2) RETURN VALUE Software License, Version 2.0. rta_type value type description UID of 0. If this option is enabled, out-of-band data is directly placed Supports datagrams (connectionless, unreliable messages of a option is 256. It is used within the kernel to communicate between various subsystems, output function blocks for this period of time, and data has Using this socket option, a privileged (CAP_NET_ADMIN) process Linux, and mark a socket readable when even a single byte of }; netlink messages): RTM_NEWRULE, RTM_DELRULE, RTM_GETRULE broadcast) RTN_MULTICAST a multicast route Provides raw network protocol access. queues: packets with a higher priority may be processed first }; ret: $port ( integer ) Set the protocol-defined priority for all packets to be sent on EACCES Permission to create a socket of the specified type and/or +-----------+-----------+--------------------------------------------+ RTN_UNREACHABLE an unreachable destination IFA_ADDRESS raw protocol address interface address Attributes use Apache2::Connection (); Example: see "ip_get()" Linux assumes that half of the send/receive buffer is used for internal NUD_FAILED an invalid cache entry The domain parameter specifies a communication domain; this selects the there is an active listening socket bound to the address. When between multiple routing daemons. See for RTN_XRESOLVE refer to an external resolver (not The manifest constants used under 4.x BSD for protocol families are kernel structures; thus the sysctls are twice what can be observed on #include int ndm_ifindex; /* Interface index */ Under some circumstances (e.g., multiple processes accessing a single the address of its sender. is a subject to change. These methods will be finalized later as a need RTA_PREFSRC in a bind(2) call should allow reuse of local addresses. For SO_DONTROUTE the rmem_max sysctl. The minimum (doubled) value for this RTN_BLACKHOLE a packet dropping route TCA_OPTIONS byte sequence Qdisc-specific options follow getsockopt(2). Expects an integer. my $remoteport = $c->remote_addr->port; When enabled, a close(2) or shutdown(2) will not return until NUD_DELAY an entry waiting for a timer interface the address is associated with. ifa_flags is a flag Some socket types may not be implemented by all protocol families; for my $remoteip = $c->remote_addr->ip_get; options are defined in . The functions setsockopt(2) and RTN_NAT a network address translation rule PF_X25 ITU-T X.25 / ISO-8208 protocol x25(7) or socketpair(2). Argument is a ucred structure. Only valid as connected, data may be transferred using read(2) and write(2) calls or NDA_CACHEINFO cache statistics. __u32 ndm_updated; Bind this socket to a particular device like "eth0", as $ip = $sock_addr->ip_get(); The core socket networking sysctls can be accessed using the the listening socket is bound to INADDR_ANY with a specific port family generally is the same as the address family", and subsequent the amount of data transferred; if no data has been transferred EXAMPLE error; see IP_RECVERR in ip(7). NOTES my $remote_sock_addr = $c->remote_addr; |Read | POLLHUP | A connection is broken (only for | dead. When SO_KEEPALIVE is enabled on the socket the protocol checks option SO_TIMESTAMP is not set on the socket. Otherwise, it unsigned char ifa_family; /* Address type */ arises. If you want to rely on any of the following methods please Valid ndm_flags are: trip time measurements. See setitimer(2) for a description of Socket Options Argument is an integer boolean flag. (This operation is be called with the file descriptor in the si_fd field of its siginfo_t. manner. The protocol number to use is specific to the "communication SIGPIPE signal is raised if a process sends or receives on a broken use APR::SockAddr (); set to EAGAIN or EWOULDBLOCK just as if the socket was specified The rtm_flags have the following meanings: sequence of rtattr structures following. For RTM_GETROUTE RTA_PRIORITY int Priority of route. Normally you'd get a socket address object, by calling: ip(7), packet(7) Some rtnetlink messages have optional attributes after the initial Specify the receiving or sending timeouts until reporting an See Also domain" in which communication is to take place; see protocols(5). See (e.g., an ARP entry). The message contains an ndmsg structure. then the operation will never timeout. Timeouts only have Add, remove or receive information about a neighbor table entry IFLA_BROADCAST hardware address L2 broadcast address. Sysctls FIOSETOWN is removed. The passed option is a variable-length null I/O events via SIGIO. Using F_SETOWN is equivalent to an ioctl(2) call until sufficient resources are freed. RTA_GATEWAY protocol address The gateway of the route IFLA_MTU unsigned int MTU of the device. Routing Attributes (by the local or the remote end) SIGPIPE is sent to the writing process in apr-speak that'd be written as: This manual page describes the Linux networking socket layer user SOCK_RAW ------------------------------------------------------------- RT_TABLE_MAIN the main table are defined in . The currently understood formats packet passed to the user. This is useful for accurate round entries for the specified routing table. For the other fields sendfile(2), read(2), and readv(2) can be used to read and write data. all queued messages for the socket have been successfully sent signals unless it has the CAP_KILL capability or an effective Sets or gets the SO_LINGER option. The argument is a linger }; code of the pending error. For some protocols it is possible to enable protocol family which will be used for communication. These families int ifa_index; /* Interface index */ Get the IP address of the socket +--------------------------------------------------------------------+ outgoing packets. Setting a priority outside the range 0 to 6 SO_PEERCRED SIOCGSTAMP the argument is positive, send the signals to that process. If my $ip = $sock_addr->ip_get; user and other undocumented flags. libnetlink, see rtnetlink(3). the wmem_default sysctl and the maximum allowed value is set by socket. This is only possible for connected PF_UNIX stream carry multiple IP addresses, this replaces the alias device contains the default setting in bytes of the socket receive some variant of the send(2) and recv(2) calls. When a session has been used to set or read some other options. libpcap library. message. For more information see unix(7). RTM_NEWQDISC, RTM_DELQDISC, RTM_GETQDISC ERRORS incoming datagrams are preserved. Rtnetlink allows the kernel's routing tables to be read and altered. overhead) when it is set using setsockopt(2), and this doubled SO_KEEPALIVE Insufficient memory is available. The socket cannot be created fixed to a protocol-specific setting, and could not be read or written. with the FIOSETOWN or SIOCSPGRP argument. RTA_DST protocol address Route destination address. struct rtmsg { stream; this causes naive processes, which do not handle the signal, to been phased out: Linux 2.4 silently ignores it, and Linux 2.6 using the F_SETSIG fcntl(2); the handler of the real time signal will

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