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/*
* Copyright (c) 2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Display protocol blocks in the vsock domain.
*/
#include <sys/proc_info.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/vsock.h>
#include <errno.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include "netstat.h"
#ifdef AF_VSOCK
static void vsockdomainpr __P((struct xvsockpcb *));
void
vsockpr(uint32_t proto,
char *name, int af)
{
char *buf, *next;
size_t len;
struct xvsockpgen *xvg, *oxvg;
struct xvsockpcb *xpcb;
const char* mibvar = "net.vsock.pcblist";
len = 0;
if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
if (errno != ENOENT)
warn("sysctl: %s", mibvar);
return;
}
if ((buf = malloc(len)) == 0) {
warn("malloc %lu bytes", (u_long)len);
return;
}
if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
warn("sysctl: %s", mibvar);
free(buf);
return;
}
/*
* Bail-out to avoid logic error in the loop below when
* there is in fact no more control block to process
*/
if (len <= 2 * sizeof(struct xvsockpgen)) {
free(buf);
return;
}
oxvg = (struct xvsockpgen *)buf;
// Save room for the last xvsockpgen.
len -= oxvg->xvg_len;
for (next = buf + oxvg->xvg_len; next < buf + len; next += xpcb->xv_len) {
xpcb = (struct xvsockpcb *)next;
/* Ignore PCBs which were freed during copyout. */
if (xpcb->xvp_gencnt > oxvg->xvg_gen)
continue;
vsockdomainpr(xpcb);
}
xvg = (struct xvsockpgen *)next;
if (xvg != oxvg && xvg->xvg_gen != oxvg->xvg_gen) {
if (oxvg->xvg_count > xvg->xvg_count) {
printf("Some vsock sockets may have been deleted.\n");
} else if (oxvg->xvg_count < xvg->xvg_count) {
printf("Some vsock sockets may have been created.\n");
} else {
printf("Some vsock sockets may have been created or deleted.\n");
}
}
free(buf);
}
static void
vsock_print_addr(buf, cid, port)
char *buf;
uint32_t cid;
uint32_t port;
{
if (cid == VMADDR_CID_ANY && port == VMADDR_PORT_ANY) {
(void) sprintf(buf, "*:*");
} else if (cid == VMADDR_CID_ANY) {
(void) sprintf(buf, "*:%u", port);
} else if (port == VMADDR_PORT_ANY) {
(void) sprintf(buf, "%u:*", cid);
} else {
(void) sprintf(buf, "%u:%u", cid, port);
}
}
static void
vsockdomainpr(xpcb)
struct xvsockpcb *xpcb;
{
static int first = 1;
if (first) {
printf("Active VSock sockets\n");
printf("%-5.5s %-6.6s %-6.6s %-6.6s %-18.18s %-18.18s %-11.11s",
"Proto", "Type",
"Recv-Q", "Send-Q",
"Local Address", "Foreign Address",
"State");
if (vflag > 0)
printf(" %10.10s %10.10s %10.10s %10.10s %6.6s %6.6s %6.6s %6s %10s",
"rxcnt", "txcnt", "peer_rxcnt", "peer_rxhiwat",
"rxhiwat", "txhiwat", "pid", "state", "options");
printf("\n");
first = 0;
}
struct xsocket *so = &xpcb->xv_socket;
char srcAddr[50];
char dstAddr[50];
vsock_print_addr(srcAddr, xpcb->xvp_local_cid, xpcb->xvp_local_port);
vsock_print_addr(dstAddr, xpcb->xvp_remote_cid, xpcb->xvp_remote_port);
// Determine the vsock socket state.
char *state;
if (so->so_state & SOI_S_ISCONNECTING) {
state = "CONNECTING";
} else if (so->so_state & SOI_S_ISCONNECTED) {
state = "ESTABLISHED";
} else if (so->so_state & SOI_S_ISDISCONNECTING) {
state = "CLOSING";
} else if (so->so_options & SO_ACCEPTCONN) {
state = "LISTEN";
} else {
state = "CLOSED";
}
printf("%-5.5s %-6.6s %6u %6u %-18s %-18s %-11s",
"vsock", "stream",
so->so_rcv.sb_cc, so->so_snd.sb_cc,
srcAddr, dstAddr,
state);
if (vflag > 0)
printf(" %10u %10u %10u %10u %6u %6u %6u 0x%04x 0x%08x",
xpcb->xvp_rxcnt,
xpcb->xvp_txcnt,
xpcb->xvp_peer_rxcnt,
xpcb->xvp_peer_rxhiwat,
so->so_rcv.sb_hiwat,
so->so_snd.sb_hiwat,
xpcb->xvp_last_pid,
so->so_state,
so->so_options);
printf("\n");
}
#endif /* AF_VSOCK */
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