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Some clenaup of ngs_rcvmsg():

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- Inline ship_msg() into ngs_rcvmsg().
  - Plug memory leak in case if no control socket present.
  - Remove malloc() and allocate the sockaddr on stack.
  - style(9).
This commit is contained in:
Gleb Smirnoff 2006-10-17 16:52:09 +00:00
parent b4db900931
commit 237af4af3f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=163468
1 changed files with 47 additions and 61 deletions
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108
sys/netgraph/ng_socket.c
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@ -127,8 +127,6 @@ static int ng_connect_data(struct sockaddr *nam, struct ngpcb *pcbp);
static int ng_bind(struct sockaddr *nam, struct ngpcb *pcbp);
static int ngs_mod_event(module_t mod, int event, void *data);
static int ship_msg(struct ngpcb *pcbp, struct ng_mesg *msg,
struct sockaddr_ng *addr);
static void ng_socket_item_applied(void *context, int error);
/* Netgraph type descriptor */
@ -786,42 +784,6 @@ ng_bind(struct sockaddr *nam, struct ngpcb *pcbp)
return (ng_name_node(priv->node, sap->sg_data));
}
/*
* Take a message and pass it up to the control socket associated
* with the node.
*/
static int
ship_msg(struct ngpcb *pcbp, struct ng_mesg *msg, struct sockaddr_ng *addr)
{
struct socket *const so = pcbp->ng_socket;
struct mbuf *mdata;
int msglen;
int error = 0;
/* Copy the message itself into an mbuf chain */
msglen = sizeof(struct ng_mesg) + msg->header.arglen;
mdata = m_devget((caddr_t) msg, msglen, 0, NULL, NULL);
/* Here we free the message, as we are the end of the line.
* We need to do that regardless of whether we got mbufs. */
NG_FREE_MSG(msg);
if (mdata == NULL) {
TRAP_ERROR;
return (ENOBUFS);
}
/* Send it up to the socket */
if (sbappendaddr(&so->so_rcv,
(struct sockaddr *) addr, mdata, NULL) == 0) {
TRAP_ERROR;
m_freem(mdata);
error = so->so_error = ENOBUFS;
}
sorwakeup(so);
return (error);
}
/***************************************************************
Netgraph node
***************************************************************/
@ -873,20 +835,24 @@ ngs_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
struct ngsock *const priv = NG_NODE_PRIVATE(node);
struct ngpcb *const pcbp = priv->ctlsock;
struct sockaddr_ng *addr;
struct socket *const so = pcbp->ng_socket;
struct sockaddr_ng addr;
struct ng_mesg *msg;
struct mbuf *m;
ng_ID_t retaddr = NGI_RETADDR(item);
int addrlen;
int error = 0;
struct ng_mesg *msg;
ng_ID_t retaddr = NGI_RETADDR(item);
char retabuf[32];
NGI_GET_MSG(item, msg);
NG_FREE_ITEM(item); /* we have all we need */
NG_FREE_ITEM(item);
/* Only allow mesgs to be passed if we have the control socket.
* Data sockets can only support the generic messages. */
/*
* Only allow mesgs to be passed if we have the control socket.
* Data sockets can only support the generic messages.
*/
if (pcbp == NULL) {
TRAP_ERROR;
NG_FREE_MSG(msg);
return (EINVAL);
}
@ -911,27 +877,47 @@ ngs_rcvmsg(node_p node, item_p item, hook_p lasthook)
default:
error = EINVAL; /* unknown command */
}
/* Free the message and return */
/* Free the message and return. */
NG_FREE_MSG(msg);
return(error);
return (error);
}
/* Get the return address into a sockaddr */
sprintf(retabuf,"[%x]:", retaddr);
addrlen = strlen(retabuf);
MALLOC(addr, struct sockaddr_ng *, addrlen + 4, M_NETGRAPH_PATH, M_NOWAIT);
if (addr == NULL) {
/* Get the return address into a sockaddr. */
bzero(&addr, sizeof(addr));
addr.sg_len = sizeof(addr);
addr.sg_family = AF_NETGRAPH;
addrlen = snprintf((char *)&addr.sg_data, sizeof(addr.sg_data),
"[%x]:", retaddr);
if (addrlen < 0 || addrlen > sizeof(addr.sg_data)) {
printf("%s: snprintf([%x]) failed - %d\n", __func__, retaddr,
addrlen);
NG_FREE_MSG(msg);
return (EINVAL);
}
/* Copy the message itself into an mbuf chain. */
m = m_devget((caddr_t)msg, sizeof(struct ng_mesg) + msg->header.arglen,
0, NULL, NULL);
/*
* Here we free the message. We need to do that
* regardless of whether we got mbufs.
*/
NG_FREE_MSG(msg);
if (m == NULL) {
TRAP_ERROR;
return (ENOMEM);
return (ENOBUFS);
}
addr->sg_len = addrlen + 3;
addr->sg_family = AF_NETGRAPH;
bcopy(retabuf, addr->sg_data, addrlen);
addr->sg_data[addrlen] = '\0';
/* Send it up */
error = ship_msg(pcbp, msg, addr);
FREE(addr, M_NETGRAPH_PATH);
/* Send it up to the socket. */
if (sbappendaddr(&so->so_rcv, (struct sockaddr *)&addr, m, NULL) == 0) {
TRAP_ERROR;
m_freem(m);
error = so->so_error = ENOBUFS;
}
sorwakeup(so);
return (error);
}