mirror of
https://git.FreeBSD.org/src.git
synced 2024-10-19 02:29:40 +00:00
Make netgraph modules refuse to link with modules of a different ABI version.
also try implement teh documented behaviour in socket nodes so that when there is only one hook, an unaddressed write/send will DTRT and send the data to that hook.
This commit is contained in:
parent
3054b08899
commit
9d72a7a3f8
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=72053
@ -1111,7 +1111,9 @@ static moduledata_t ng_##typename##_mod = { \
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(typestructp) \
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}; \
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DECLARE_MODULE(ng_##typename, ng_##typename##_mod, sub, order); \
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MODULE_DEPEND(ng_##typename, netgraph, 1, 1, 1)
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MODULE_DEPEND(ng_##typename, netgraph, NG_ABI_VERSION, \
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NG_ABI_VERSION, \
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NG_ABI_VERSION)
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#define NETGRAPH_INIT(tn, tp) \
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NETGRAPH_INIT_ORDERED(tn, tp, SI_SUB_PSEUDO, SI_ORDER_ANY)
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@ -63,7 +63,7 @@
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#include <netgraph/netgraph.h>
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#include <netgraph/ng_parse.h>
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MODULE_VERSION(netgraph, 1);
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MODULE_VERSION(netgraph, NG_ABI_VERSION);
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/* List of all active nodes */
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static LIST_HEAD(, ng_node) ng_nodelist;
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@ -1423,6 +1423,7 @@ ng_rmnode_self(node_p node)
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if (node == &ng_deadnode)
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return (0);
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node->nd_flags |= NG_INVALID;
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if (node->nd_flags & NG_CLOSING)
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return (0);
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@ -108,6 +108,7 @@ static ng_constructor_t ngs_constructor;
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static ng_rcvmsg_t ngs_rcvmsg;
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static ng_shutdown_t ngs_shutdown;
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static ng_newhook_t ngs_newhook;
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static ng_connect_t ngs_connect;
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static ng_rcvdata_t ngs_rcvdata;
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static ng_disconnect_t ngs_disconnect;
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@ -135,7 +136,7 @@ static struct ng_type typestruct = {
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ngs_shutdown,
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ngs_newhook,
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NULL,
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NULL,
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ngs_connect,
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ngs_rcvdata,
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ngs_disconnect,
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NULL
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@ -380,11 +381,13 @@ ngd_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
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/* Find the correct hook from 'hookname' */
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LIST_FOREACH(hook, &pcbp->sockdata->node->nd_hooks, hk_hooks) {
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if (strcmp(hookname, NG_HOOK_NAME(hook)) == 0)
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if (strcmp(hookname, NG_HOOK_NAME(hook)) == 0) {
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break;
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}
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}
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if (hook == NULL)
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if (hook == NULL) {
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error = EHOSTUNREACH;
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}
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}
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/* Send data (OK if hook is NULL) */
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@ -531,23 +534,23 @@ ng_attach_common(struct socket *so, int type)
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static void
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ng_detach_common(struct ngpcb *pcbp, int which)
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{
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struct ngsock *sockdata;
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struct ngsock *priv;
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if (pcbp->sockdata) {
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sockdata = pcbp->sockdata;
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priv = pcbp->sockdata;
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pcbp->sockdata = NULL;
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switch (which) {
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case NG_CONTROL:
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sockdata->ctlsock = NULL;
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priv->ctlsock = NULL;
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break;
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case NG_DATA:
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sockdata->datasock = NULL;
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priv->datasock = NULL;
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break;
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default:
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panic(__FUNCTION__);
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}
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if ((--sockdata->refs == 0) && (sockdata->node != NULL))
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ng_rmnode_self(sockdata->node);
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if ((--priv->refs == 0) && (priv->node != NULL))
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ng_rmnode_self(priv->node);
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}
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pcbp->ng_socket->so_pcb = NULL;
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pcbp->ng_socket = NULL;
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@ -626,7 +629,7 @@ ng_connect_data(struct sockaddr *nam, struct ngpcb *pcbp)
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{
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struct sockaddr_ng *sap;
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node_p farnode;
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struct ngsock *sockdata;
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struct ngsock *priv;
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int error;
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item_p item;
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@ -658,8 +661,8 @@ ng_connect_data(struct sockaddr *nam, struct ngpcb *pcbp)
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NG_FREE_ITEM(item); /* drop the reference to the node */
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return (EINVAL);
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}
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sockdata = NG_NODE_PRIVATE(farnode);
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if (sockdata->datasock != NULL) {
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priv = NG_NODE_PRIVATE(farnode);
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if (priv->datasock != NULL) {
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NG_FREE_ITEM(item); /* drop the reference to the node */
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return (EADDRINUSE);
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}
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@ -668,9 +671,9 @@ ng_connect_data(struct sockaddr *nam, struct ngpcb *pcbp)
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* Link the PCB and the private data struct. and note the extra
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* reference. Drop the extra reference on the node.
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*/
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sockdata->datasock = pcbp;
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pcbp->sockdata = sockdata;
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sockdata->refs++; /* XXX possible race if it's being freed */
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priv->datasock = pcbp;
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pcbp->sockdata = priv;
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priv->refs++; /* XXX possible race if it's being freed */
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NG_FREE_ITEM(item); /* drop the reference to the node */
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return (0);
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}
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@ -681,10 +684,10 @@ ng_connect_data(struct sockaddr *nam, struct ngpcb *pcbp)
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static int
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ng_bind(struct sockaddr *nam, struct ngpcb *pcbp)
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{
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struct ngsock *const sockdata = pcbp->sockdata;
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struct ngsock *const priv = pcbp->sockdata;
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struct sockaddr_ng *const sap = (struct sockaddr_ng *) nam;
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if (sockdata == NULL) {
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if (priv == NULL) {
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TRAP_ERROR;
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return (EINVAL);
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}
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@ -695,7 +698,7 @@ ng_bind(struct sockaddr *nam, struct ngpcb *pcbp)
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TRAP_ERROR;
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return (EINVAL);
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}
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return (ng_name_node(sockdata->node, sap->sg_data));
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return (ng_name_node(priv->node, sap->sg_data));
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}
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/*
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@ -753,6 +756,26 @@ ngs_newhook(node_p node, hook_p hook, const char *name)
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return (0);
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}
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/*
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* if only one hook, allow read(2) and write(2) to work.
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*/
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static int
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ngs_connect(hook_p hook)
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{
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node_p node = NG_HOOK_NODE(hook);
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struct ngsock *priv = NG_NODE_PRIVATE(node);
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if ((priv->datasock)
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&& (priv->datasock->ng_socket)) {
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if (NG_NODE_NUMHOOKS(node) == 1) {
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priv->datasock->ng_socket->so_state |= SS_ISCONNECTED;
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} else {
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priv->datasock->ng_socket->so_state &= ~SS_ISCONNECTED;
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}
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}
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return (0);
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}
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/*
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* Incoming messages get passed up to the control socket.
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* Unless they are for us specifically (socket_type)
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@ -760,8 +783,8 @@ ngs_newhook(node_p node, hook_p hook, const char *name)
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static int
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ngs_rcvmsg(node_p node, item_p item, hook_p lasthook)
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{
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struct ngsock *const sockdata = NG_NODE_PRIVATE(node);
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struct ngpcb *const pcbp = sockdata->ctlsock;
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struct ngsock *const priv = NG_NODE_PRIVATE(node);
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struct ngpcb *const pcbp = priv->ctlsock;
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struct sockaddr_ng *addr;
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int addrlen;
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int error = 0;
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@ -792,10 +815,10 @@ msg->header.token);
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if (msg->header.typecookie == NGM_SOCKET_COOKIE) {
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switch (msg->header.cmd) {
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case NGM_SOCK_CMD_NOLINGER:
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sockdata->flags |= NGS_FLAG_NOLINGER;
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priv->flags |= NGS_FLAG_NOLINGER;
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break;
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case NGM_SOCK_CMD_LINGER:
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sockdata->flags &= ~NGS_FLAG_NOLINGER;
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priv->flags &= ~NGS_FLAG_NOLINGER;
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break;
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default:
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error = EINVAL; /* unknown command */
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@ -830,8 +853,8 @@ msg->header.token);
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static int
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ngs_rcvdata(hook_p hook, item_p item)
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{
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struct ngsock *const sockdata = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
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struct ngpcb *const pcbp = sockdata->datasock;
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struct ngsock *const priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
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struct ngpcb *const pcbp = priv->datasock;
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struct socket *so;
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struct sockaddr_ng *addr;
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char *addrbuf[NG_HOOKLEN + 1 + 4];
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@ -874,12 +897,22 @@ ngs_rcvdata(hook_p hook, item_p item)
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static int
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ngs_disconnect(hook_p hook)
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{
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struct ngsock *const sockdata = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
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node_p node = NG_HOOK_NODE(hook);
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struct ngsock *const priv = NG_NODE_PRIVATE(node);
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if ((sockdata->flags & NGS_FLAG_NOLINGER )
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&& (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
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&& (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) {
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ng_rmnode_self(NG_HOOK_NODE(hook));
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if ((priv->datasock)
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&& (priv->datasock->ng_socket)) {
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if (NG_NODE_NUMHOOKS(node) == 1) {
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priv->datasock->ng_socket->so_state |= SS_ISCONNECTED;
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} else {
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priv->datasock->ng_socket->so_state &= ~SS_ISCONNECTED;
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}
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}
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if ((priv->flags & NGS_FLAG_NOLINGER )
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&& (NG_NODE_NUMHOOKS(node) == 0)
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&& (NG_NODE_IS_VALID(node))) {
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ng_rmnode_self(node);
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}
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return (0);
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}
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@ -892,25 +925,25 @@ ngs_disconnect(hook_p hook)
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static int
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ngs_shutdown(node_p node)
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{
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struct ngsock *const sockdata = NG_NODE_PRIVATE(node);
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struct ngpcb *const dpcbp = sockdata->datasock;
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struct ngpcb *const pcbp = sockdata->ctlsock;
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struct ngsock *const priv = NG_NODE_PRIVATE(node);
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struct ngpcb *const dpcbp = priv->datasock;
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struct ngpcb *const pcbp = priv->ctlsock;
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if (dpcbp != NULL) {
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soisdisconnected(dpcbp->ng_socket);
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dpcbp->sockdata = NULL;
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sockdata->datasock = NULL;
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sockdata->refs--;
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priv->datasock = NULL;
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priv->refs--;
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}
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if (pcbp != NULL) {
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soisdisconnected(pcbp->ng_socket);
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pcbp->sockdata = NULL;
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sockdata->ctlsock = NULL;
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sockdata->refs--;
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priv->ctlsock = NULL;
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priv->refs--;
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}
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NG_NODE_SET_PRIVATE(node, NULL);
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NG_NODE_UNREF(node);
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FREE(sockdata, M_NETGRAPH_SOCK);
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FREE(priv, M_NETGRAPH_SOCK);
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return (0);
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}
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