diff options
| -rw-r--r-- | sys/netgraph/ng_ksocket.c | 481 | ||||
| -rw-r--r-- | sys/netgraph/ng_ksocket.h | 62 |
2 files changed, 543 insertions, 0 deletions
diff --git a/sys/netgraph/ng_ksocket.c b/sys/netgraph/ng_ksocket.c new file mode 100644 index 0000000..b448778 --- /dev/null +++ b/sys/netgraph/ng_ksocket.c @@ -0,0 +1,481 @@ + +/* + * ng_ksocket.c + * + * Copyright (c) 1996-1999 Whistle Communications, Inc. + * All rights reserved. + * + * Subject to the following obligations and disclaimer of warranty, use and + * redistribution of this software, in source or object code forms, with or + * without modifications are expressly permitted by Whistle Communications; + * provided, however, that: + * 1. Any and all reproductions of the source or object code must include the + * copyright notice above and the following disclaimer of warranties; and + * 2. No rights are granted, in any manner or form, to use Whistle + * Communications, Inc. trademarks, including the mark "WHISTLE + * COMMUNICATIONS" on advertising, endorsements, or otherwise except as + * such appears in the above copyright notice or in the software. + * + * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND + * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO + * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, + * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. + * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY + * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS + * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. + * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES + * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING + * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, + * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Archie Cobbs <archie@whistle.com> + * + * $FreeBSD$ + * $Whistle: ng_ksocket.c,v 1.1 1999/11/16 20:04:40 archie Exp $ + */ + +/* + * Kernel socket node type. This node type is basically a kernel-mode + * version of a socket... kindof like the reverse of the socket node type. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/conf.h> +#include <sys/mbuf.h> +#include <sys/proc.h> +#include <sys/malloc.h> +#include <sys/protosw.h> +#include <sys/errno.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/syslog.h> +#include <sys/uio.h> + +#include <netgraph/ng_message.h> +#include <netgraph/netgraph.h> +#include <netgraph/ng_ksocket.h> + +#include <netinet/in.h> +#include <netatalk/at.h> + +/* Node private data */ +struct private { + hook_p hook; + struct socket *so; +}; +typedef struct private *priv_p; + +/* Netgraph node methods */ +static ng_constructor_t ng_ksocket_constructor; +static ng_rcvmsg_t ng_ksocket_rcvmsg; +static ng_shutdown_t ng_ksocket_rmnode; +static ng_newhook_t ng_ksocket_newhook; +static ng_rcvdata_t ng_ksocket_rcvdata; +static ng_disconnect_t ng_ksocket_disconnect; + +/* Alias structure */ +struct ng_ksocket_alias { + const char *name; + const int value; + const int family; +}; + +/* Helper functions */ +static void ng_ksocket_incoming(struct socket *so, void *arg, int waitflag); +static int ng_ksocket_parse(const struct ng_ksocket_alias *aliases, + const char *s, int family); + +/* Node type descriptor */ +static struct ng_type ng_ksocket_typestruct = { + NG_VERSION, + NG_KSOCKET_NODE_TYPE, + NULL, + ng_ksocket_constructor, + ng_ksocket_rcvmsg, + ng_ksocket_rmnode, + ng_ksocket_newhook, + NULL, + NULL, + ng_ksocket_rcvdata, + ng_ksocket_rcvdata, + ng_ksocket_disconnect +}; +NETGRAPH_INIT(ksocket, &ng_ksocket_typestruct); + +/* Protocol family aliases */ +static const struct ng_ksocket_alias ng_ksocket_families[] = { + { "local", PF_LOCAL }, + { "inet", PF_INET }, + { "inet6", PF_INET6 }, + { "atalk", PF_APPLETALK }, + { "ipx", PF_IPX }, + { "atm", PF_ATM }, + { NULL, -1 }, +}; + +/* Socket type aliases */ +static const struct ng_ksocket_alias ng_ksocket_types[] = { + { "stream", SOCK_STREAM }, + { "dgram", SOCK_DGRAM }, + { "raw", SOCK_RAW }, + { "rdm", SOCK_RDM }, + { "seqpacket", SOCK_SEQPACKET }, + { NULL, -1 }, +}; + +/* Protocol aliases */ +static const struct ng_ksocket_alias ng_ksocket_protos[] = { + { "ip", IPPROTO_IP, PF_INET }, + { "raw", IPPROTO_IP, PF_INET }, + { "icmp", IPPROTO_ICMP, PF_INET }, + { "igmp", IPPROTO_IGMP, PF_INET }, + { "tcp", IPPROTO_TCP, PF_INET }, + { "udp", IPPROTO_UDP, PF_INET }, + { "gre", IPPROTO_GRE, PF_INET }, + { "esp", IPPROTO_ESP, PF_INET }, + { "ah", IPPROTO_AH, PF_INET }, + { "swipe", IPPROTO_SWIPE, PF_INET }, + { "encap", IPPROTO_ENCAP, PF_INET }, + { "divert", IPPROTO_DIVERT, PF_INET }, + { "ddp", ATPROTO_DDP, PF_APPLETALK }, + { "aarp", ATPROTO_AARP, PF_APPLETALK }, + { NULL, -1 }, +}; + +#define ERROUT(x) do { error = (x); goto done; } while (0) + +/************************************************************************ + NETGRAPH NODE STUFF + ************************************************************************/ + +/* + * Node type constructor + */ +static int +ng_ksocket_constructor(node_p *nodep) +{ + priv_p priv; + int error; + + /* Allocate private structure */ + MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_WAITOK); + if (priv == NULL) + return (ENOMEM); + bzero(priv, sizeof(*priv)); + + /* Call generic node constructor */ + if ((error = ng_make_node_common(&ng_ksocket_typestruct, nodep))) { + FREE(priv, M_NETGRAPH); + return (error); + } + (*nodep)->private = priv; + + /* Done */ + return (0); +} + +/* + * Give our OK for a hook to be added. The hook name is of the + * form "<family>:<type>:<proto>" where the three components may + * be decimal numbers or else aliases from the above lists. + * + * Connecting a hook amounts to opening the socket. Disconnecting + * the hook closes the socket and destroys the node as well. + */ +static int +ng_ksocket_newhook(node_p node, hook_p hook, const char *name0) +{ + const priv_p priv = node->private; + char *s1, *s2, name[NG_HOOKLEN+1]; + int family, type, protocol, error; + struct proc *p = &proc0; /* XXX help what to do here */ + + /* Check if we're already connected */ + if (priv->hook != NULL) + return (EISCONN); + + /* Extract family, type, and protocol from hook name */ + snprintf(name, sizeof(name), "%s", name0); + s1 = name; + if ((s2 = index(s1, '/')) == NULL) + return (EINVAL); + *s2++ = '\0'; + if ((family = ng_ksocket_parse(ng_ksocket_families, s1, 0)) == -1) + return (EINVAL); + s1 = s2; + if ((s2 = index(s1, '/')) == NULL) + return (EINVAL); + *s2++ = '\0'; + if ((type = ng_ksocket_parse(ng_ksocket_types, s1, 0)) == -1) + return (EINVAL); + s1 = s2; + if ((protocol = ng_ksocket_parse(ng_ksocket_protos, s1, family)) == -1) + return (EINVAL); + + /* Create the socket */ + if ((error = socreate(family, &priv->so, type, protocol, p)) != 0) + return (error); + + /* XXX call soreserve() ? */ + + /* Add our hook for incoming data */ + priv->so->so_upcallarg = (caddr_t)node; + priv->so->so_upcall = ng_ksocket_incoming; + priv->so->so_rcv.sb_flags |= SB_UPCALL; + + /* OK */ + priv->hook = hook; + return (0); +} + +/* + * Receive a control message + */ +static int +ng_ksocket_rcvmsg(node_p node, struct ng_mesg *msg, + const char *raddr, struct ng_mesg **rptr) +{ + const priv_p priv = node->private; + struct ng_mesg *resp = NULL; + struct proc *p = &proc0; + int error = 0; + + switch (msg->header.typecookie) { + case NGM_KSOCKET_COOKIE: + switch (msg->header.cmd) { + case NGM_KSOCKET_BIND: + { + struct sockaddr *sa = (struct sockaddr *)msg->data; + struct socket *const so = priv->so; + + /* Must have a connected hook first */ + if (priv->hook == NULL) + ERROUT(ENETDOWN); + + /* Set and sanity check sockaddr length */ + if (msg->header.arglen > SOCK_MAXADDRLEN) + ERROUT(ENAMETOOLONG); + sa->sa_len = msg->header.arglen; + error = sobind(so, sa, p); + break; + } + case NGM_KSOCKET_LISTEN: + { + struct socket *const so = priv->so; + int backlog; + + /* Must have a connected hook first */ + if (priv->hook == NULL) + ERROUT(ENETDOWN); + + /* Get backlog argument */ + if (msg->header.arglen != sizeof(int)) + ERROUT(EINVAL); + backlog = *((int *)msg->data); + + /* Do listen */ + if ((error = solisten(so, backlog, p)) != 0) + break; + + /* Notify sender when we get a connection attempt */ + /* XXX implement me */ + break; + } + + case NGM_KSOCKET_ACCEPT: + { + ERROUT(ENODEV); /* XXX implement me */ + break; + } + + case NGM_KSOCKET_CONNECT: + { + struct socket *const so = priv->so; + struct sockaddr *sa = (struct sockaddr *)msg->data; + + /* Must have a connected hook first */ + if (priv->hook == NULL) + ERROUT(ENETDOWN); + + /* Set and sanity check sockaddr length */ + if (msg->header.arglen > SOCK_MAXADDRLEN) + ERROUT(ENAMETOOLONG); + sa->sa_len = msg->header.arglen; + + /* Do connect */ + if ((so->so_state & SS_ISCONNECTING) != 0) + ERROUT(EALREADY); + if ((error = soconnect(so, sa, p)) != 0) { + so->so_state &= ~SS_ISCONNECTING; + ERROUT(error); + } + if ((so->so_state & SS_ISCONNECTING) != 0) + /* Notify sender when we connect */ + /* XXX implement me */ + ERROUT(EINPROGRESS); + break; + } + + case NGM_KSOCKET_GETNAME: + { + ERROUT(ENODEV); /* XXX implement me */ + break; + } + + case NGM_KSOCKET_GETPEERNAME: + { + ERROUT(ENODEV); /* XXX implement me */ + break; + } + + case NGM_KSOCKET_GETOPT: + { + ERROUT(ENODEV); /* XXX implement me */ + break; + } + + case NGM_KSOCKET_SETOPT: + { + ERROUT(ENODEV); /* XXX implement me */ + break; + } + + default: + error = EINVAL; + break; + } + break; + default: + error = EINVAL; + break; + } + if (rptr) + *rptr = resp; + else if (resp) + FREE(resp, M_NETGRAPH); + +done: + FREE(msg, M_NETGRAPH); + return (error); +} + +/* + * Receive incoming data on our hook. Send it out the socket. + */ +static int +ng_ksocket_rcvdata(hook_p hook, struct mbuf *m, meta_p meta) +{ + const node_p node = hook->node; + const priv_p priv = node->private; + struct socket *const so = priv->so; + struct proc *p = &proc0; + int error; + + NG_FREE_META(meta); + error = (*so->so_proto->pr_usrreqs->pru_sosend)(so, 0, 0, m, 0, 0, p); + return (error); +} + +/* + * Destroy node + */ +static int +ng_ksocket_rmnode(node_p node) +{ + const priv_p priv = node->private; + + /* Take down netgraph node */ + node->flags |= NG_INVALID; + ng_cutlinks(node); + ng_unname(node); + if (priv->so != NULL) { + struct socket *const so = priv->so; + + priv->so = NULL; + soclose(so); + } + bzero(priv, sizeof(*priv)); + FREE(priv, M_NETGRAPH); + node->private = NULL; + ng_unref(node); /* let the node escape */ + return (0); +} + +/* + * Hook disconnection + */ +static int +ng_ksocket_disconnect(hook_p hook) +{ + if (hook->node->numhooks == 0) + ng_rmnode(hook->node); + return (0); +} + +/************************************************************************ + HELPER STUFF + ************************************************************************/ + +/* + * When incoming data is appended to the socket, we get notified here. + */ +static void +ng_ksocket_incoming(struct socket *so, void *arg, int waitflag) +{ + const node_p node = arg; + const priv_p priv = node->private; + meta_p meta = NULL; + struct sockaddr *nam; + struct mbuf *m; + struct uio auio; + int flags, error; + + /* Sanity check */ + if ((node->flags & NG_INVALID) != 0) + return; + KASSERT(so == priv->so, ("%s: wrong socket", __FUNCTION__)); + KASSERT(priv->hook != NULL, ("%s: no hook", __FUNCTION__)); + + /* Read and forward available mbuf's */ + auio.uio_procp = NULL; + auio.uio_resid = 1000000000; + flags = MSG_DONTWAIT; + do { + if ((error = (*so->so_proto->pr_usrreqs->pru_soreceive) + (so, &nam, &auio, &m, (struct mbuf **)0, &flags)) == 0) + NG_SEND_DATA(error, priv->hook, m, meta); + } while (error == 0 && m != NULL); +} + +/* + * Parse out either an integer value or an alias. + */ +static int +ng_ksocket_parse(const struct ng_ksocket_alias *aliases, + const char *s, int family) +{ + int k, val; + const char *eptr; + + /* Try aliases */ + for (k = 0; aliases[k].name != NULL; k++) { + if (strcmp(s, aliases[k].name) == 0 + && aliases[k].family == family) + return aliases[k].value; + } + + /* Try parsing as a number */ + val = (int)strtoul(s, &eptr, 10); + if (val <= 0 || *eptr != '\0') + return (-1); + return (val); +} + diff --git a/sys/netgraph/ng_ksocket.h b/sys/netgraph/ng_ksocket.h new file mode 100644 index 0000000..93f3752 --- /dev/null +++ b/sys/netgraph/ng_ksocket.h @@ -0,0 +1,62 @@ + +/* + * ng_ksocket.h + * + * Copyright (c) 1996-1999 Whistle Communications, Inc. + * All rights reserved. + * + * Subject to the following obligations and disclaimer of warranty, use and + * redistribution of this software, in source or object code forms, with or + * without modifications are expressly permitted by Whistle Communications; + * provided, however, that: + * 1. Any and all reproductions of the source or object code must include the + * copyright notice above and the following disclaimer of warranties; and + * 2. No rights are granted, in any manner or form, to use Whistle + * Communications, Inc. trademarks, including the mark "WHISTLE + * COMMUNICATIONS" on advertising, endorsements, or otherwise except as + * such appears in the above copyright notice or in the software. + * + * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND + * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO + * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, + * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. + * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY + * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS + * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. + * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES + * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING + * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, + * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Archie Cobbs <archie@whistle.com> + * + * $FreeBSD$ + * $Whistle: ng_ksocket.h,v 1.1 1999/11/16 20:04:40 archie Exp $ + */ + +#ifndef _NETGRAPH_KSOCKET_H_ +#define _NETGRAPH_KSOCKET_H_ + +/* Node type name and magic cookie */ +#define NG_KSOCKET_NODE_TYPE "ksocket" +#define NGM_KSOCKET_COOKIE 942710669 + +/* Netgraph commands */ +enum { + NGM_KSOCKET_BIND = 1, + NGM_KSOCKET_LISTEN, + NGM_KSOCKET_ACCEPT, + NGM_KSOCKET_CONNECT, + NGM_KSOCKET_GETNAME, + NGM_KSOCKET_GETPEERNAME, + NGM_KSOCKET_SETOPT, + NGM_KSOCKET_GETOPT, +}; + +#endif /* _NETGRAPH_KSOCKET_H_ */ |
