62112d181c
net_check_clients() prints this when an VLAN has host devices, but no guest devices. It uses VLANState members nb_guest_devs and nb_host_devs to keep track of these devices. However, -device does not update nb_guest_devs, only net_init_nic() does that, for -net nic. Check the VLAN clients directly, and remove the counters. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
574 lines
16 KiB
C
574 lines
16 KiB
C
/*
|
|
* QEMU System Emulator
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include "net/socket.h"
|
|
|
|
#include "config-host.h"
|
|
|
|
#include "net.h"
|
|
#include "qemu-char.h"
|
|
#include "qemu-common.h"
|
|
#include "qemu-option.h"
|
|
#include "qemu_socket.h"
|
|
#include "sysemu.h"
|
|
|
|
typedef struct NetSocketState {
|
|
VLANClientState nc;
|
|
int fd;
|
|
int state; /* 0 = getting length, 1 = getting data */
|
|
unsigned int index;
|
|
unsigned int packet_len;
|
|
uint8_t buf[4096];
|
|
struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
|
|
} NetSocketState;
|
|
|
|
typedef struct NetSocketListenState {
|
|
VLANState *vlan;
|
|
char *model;
|
|
char *name;
|
|
int fd;
|
|
} NetSocketListenState;
|
|
|
|
/* XXX: we consider we can send the whole packet without blocking */
|
|
static ssize_t net_socket_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
|
|
{
|
|
NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
|
|
uint32_t len;
|
|
len = htonl(size);
|
|
|
|
send_all(s->fd, (const uint8_t *)&len, sizeof(len));
|
|
return send_all(s->fd, buf, size);
|
|
}
|
|
|
|
static ssize_t net_socket_receive_dgram(VLANClientState *nc, const uint8_t *buf, size_t size)
|
|
{
|
|
NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
|
|
|
|
return sendto(s->fd, (const void *)buf, size, 0,
|
|
(struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
|
|
}
|
|
|
|
static void net_socket_send(void *opaque)
|
|
{
|
|
NetSocketState *s = opaque;
|
|
int size, err;
|
|
unsigned l;
|
|
uint8_t buf1[4096];
|
|
const uint8_t *buf;
|
|
|
|
size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
|
|
if (size < 0) {
|
|
err = socket_error();
|
|
if (err != EWOULDBLOCK)
|
|
goto eoc;
|
|
} else if (size == 0) {
|
|
/* end of connection */
|
|
eoc:
|
|
qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
|
|
closesocket(s->fd);
|
|
return;
|
|
}
|
|
buf = buf1;
|
|
while (size > 0) {
|
|
/* reassemble a packet from the network */
|
|
switch(s->state) {
|
|
case 0:
|
|
l = 4 - s->index;
|
|
if (l > size)
|
|
l = size;
|
|
memcpy(s->buf + s->index, buf, l);
|
|
buf += l;
|
|
size -= l;
|
|
s->index += l;
|
|
if (s->index == 4) {
|
|
/* got length */
|
|
s->packet_len = ntohl(*(uint32_t *)s->buf);
|
|
s->index = 0;
|
|
s->state = 1;
|
|
}
|
|
break;
|
|
case 1:
|
|
l = s->packet_len - s->index;
|
|
if (l > size)
|
|
l = size;
|
|
if (s->index + l <= sizeof(s->buf)) {
|
|
memcpy(s->buf + s->index, buf, l);
|
|
} else {
|
|
fprintf(stderr, "serious error: oversized packet received,"
|
|
"connection terminated.\n");
|
|
s->state = 0;
|
|
goto eoc;
|
|
}
|
|
|
|
s->index += l;
|
|
buf += l;
|
|
size -= l;
|
|
if (s->index >= s->packet_len) {
|
|
qemu_send_packet(&s->nc, s->buf, s->packet_len);
|
|
s->index = 0;
|
|
s->state = 0;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void net_socket_send_dgram(void *opaque)
|
|
{
|
|
NetSocketState *s = opaque;
|
|
int size;
|
|
|
|
size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
|
|
if (size < 0)
|
|
return;
|
|
if (size == 0) {
|
|
/* end of connection */
|
|
qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
|
|
return;
|
|
}
|
|
qemu_send_packet(&s->nc, s->buf, size);
|
|
}
|
|
|
|
static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
|
|
{
|
|
struct ip_mreq imr;
|
|
int fd;
|
|
int val, ret;
|
|
if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
|
|
fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
|
|
inet_ntoa(mcastaddr->sin_addr),
|
|
(int)ntohl(mcastaddr->sin_addr.s_addr));
|
|
return -1;
|
|
|
|
}
|
|
fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
|
|
if (fd < 0) {
|
|
perror("socket(PF_INET, SOCK_DGRAM)");
|
|
return -1;
|
|
}
|
|
|
|
val = 1;
|
|
ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
|
|
(const char *)&val, sizeof(val));
|
|
if (ret < 0) {
|
|
perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
|
|
goto fail;
|
|
}
|
|
|
|
ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
|
|
if (ret < 0) {
|
|
perror("bind");
|
|
goto fail;
|
|
}
|
|
|
|
/* Add host to multicast group */
|
|
imr.imr_multiaddr = mcastaddr->sin_addr;
|
|
imr.imr_interface.s_addr = htonl(INADDR_ANY);
|
|
|
|
ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
|
|
(const char *)&imr, sizeof(struct ip_mreq));
|
|
if (ret < 0) {
|
|
perror("setsockopt(IP_ADD_MEMBERSHIP)");
|
|
goto fail;
|
|
}
|
|
|
|
/* Force mcast msgs to loopback (eg. several QEMUs in same host */
|
|
val = 1;
|
|
ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
|
|
(const char *)&val, sizeof(val));
|
|
if (ret < 0) {
|
|
perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
|
|
goto fail;
|
|
}
|
|
|
|
socket_set_nonblock(fd);
|
|
return fd;
|
|
fail:
|
|
if (fd >= 0)
|
|
closesocket(fd);
|
|
return -1;
|
|
}
|
|
|
|
static void net_socket_cleanup(VLANClientState *nc)
|
|
{
|
|
NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
|
|
qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
|
|
close(s->fd);
|
|
}
|
|
|
|
static NetClientInfo net_dgram_socket_info = {
|
|
.type = NET_CLIENT_TYPE_SOCKET,
|
|
.size = sizeof(NetSocketState),
|
|
.receive = net_socket_receive_dgram,
|
|
.cleanup = net_socket_cleanup,
|
|
};
|
|
|
|
static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
|
|
const char *model,
|
|
const char *name,
|
|
int fd, int is_connected)
|
|
{
|
|
struct sockaddr_in saddr;
|
|
int newfd;
|
|
socklen_t saddr_len;
|
|
VLANClientState *nc;
|
|
NetSocketState *s;
|
|
|
|
/* fd passed: multicast: "learn" dgram_dst address from bound address and save it
|
|
* Because this may be "shared" socket from a "master" process, datagrams would be recv()
|
|
* by ONLY ONE process: we must "clone" this dgram socket --jjo
|
|
*/
|
|
|
|
if (is_connected) {
|
|
if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
|
|
/* must be bound */
|
|
if (saddr.sin_addr.s_addr==0) {
|
|
fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
|
|
fd);
|
|
return NULL;
|
|
}
|
|
/* clone dgram socket */
|
|
newfd = net_socket_mcast_create(&saddr);
|
|
if (newfd < 0) {
|
|
/* error already reported by net_socket_mcast_create() */
|
|
close(fd);
|
|
return NULL;
|
|
}
|
|
/* clone newfd to fd, close newfd */
|
|
dup2(newfd, fd);
|
|
close(newfd);
|
|
|
|
} else {
|
|
fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
|
|
fd, strerror(errno));
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
nc = qemu_new_net_client(&net_dgram_socket_info, vlan, NULL, model, name);
|
|
|
|
snprintf(nc->info_str, sizeof(nc->info_str),
|
|
"socket: fd=%d (%s mcast=%s:%d)",
|
|
fd, is_connected ? "cloned" : "",
|
|
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
|
|
|
|
s = DO_UPCAST(NetSocketState, nc, nc);
|
|
|
|
s->fd = fd;
|
|
|
|
qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
|
|
|
|
/* mcast: save bound address as dst */
|
|
if (is_connected) s->dgram_dst=saddr;
|
|
|
|
return s;
|
|
}
|
|
|
|
static void net_socket_connect(void *opaque)
|
|
{
|
|
NetSocketState *s = opaque;
|
|
qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
|
|
}
|
|
|
|
static NetClientInfo net_socket_info = {
|
|
.type = NET_CLIENT_TYPE_SOCKET,
|
|
.size = sizeof(NetSocketState),
|
|
.receive = net_socket_receive,
|
|
.cleanup = net_socket_cleanup,
|
|
};
|
|
|
|
static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
|
|
const char *model,
|
|
const char *name,
|
|
int fd, int is_connected)
|
|
{
|
|
VLANClientState *nc;
|
|
NetSocketState *s;
|
|
|
|
nc = qemu_new_net_client(&net_socket_info, vlan, NULL, model, name);
|
|
|
|
snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd);
|
|
|
|
s = DO_UPCAST(NetSocketState, nc, nc);
|
|
|
|
s->fd = fd;
|
|
|
|
if (is_connected) {
|
|
net_socket_connect(s);
|
|
} else {
|
|
qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static NetSocketState *net_socket_fd_init(VLANState *vlan,
|
|
const char *model, const char *name,
|
|
int fd, int is_connected)
|
|
{
|
|
int so_type = -1, optlen=sizeof(so_type);
|
|
|
|
if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
|
|
(socklen_t *)&optlen)< 0) {
|
|
fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
|
|
return NULL;
|
|
}
|
|
switch(so_type) {
|
|
case SOCK_DGRAM:
|
|
return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
|
|
case SOCK_STREAM:
|
|
return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
|
|
default:
|
|
/* who knows ... this could be a eg. a pty, do warn and continue as stream */
|
|
fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
|
|
return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void net_socket_accept(void *opaque)
|
|
{
|
|
NetSocketListenState *s = opaque;
|
|
NetSocketState *s1;
|
|
struct sockaddr_in saddr;
|
|
socklen_t len;
|
|
int fd;
|
|
|
|
for(;;) {
|
|
len = sizeof(saddr);
|
|
fd = qemu_accept(s->fd, (struct sockaddr *)&saddr, &len);
|
|
if (fd < 0 && errno != EINTR) {
|
|
return;
|
|
} else if (fd >= 0) {
|
|
break;
|
|
}
|
|
}
|
|
s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
|
|
if (!s1) {
|
|
closesocket(fd);
|
|
} else {
|
|
snprintf(s1->nc.info_str, sizeof(s1->nc.info_str),
|
|
"socket: connection from %s:%d",
|
|
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
|
|
}
|
|
}
|
|
|
|
static int net_socket_listen_init(VLANState *vlan,
|
|
const char *model,
|
|
const char *name,
|
|
const char *host_str)
|
|
{
|
|
NetSocketListenState *s;
|
|
int fd, val, ret;
|
|
struct sockaddr_in saddr;
|
|
|
|
if (parse_host_port(&saddr, host_str) < 0)
|
|
return -1;
|
|
|
|
s = qemu_mallocz(sizeof(NetSocketListenState));
|
|
|
|
fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
|
|
if (fd < 0) {
|
|
perror("socket");
|
|
return -1;
|
|
}
|
|
socket_set_nonblock(fd);
|
|
|
|
/* allow fast reuse */
|
|
val = 1;
|
|
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
|
|
|
|
ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
|
|
if (ret < 0) {
|
|
perror("bind");
|
|
return -1;
|
|
}
|
|
ret = listen(fd, 0);
|
|
if (ret < 0) {
|
|
perror("listen");
|
|
return -1;
|
|
}
|
|
s->vlan = vlan;
|
|
s->model = qemu_strdup(model);
|
|
s->name = name ? qemu_strdup(name) : NULL;
|
|
s->fd = fd;
|
|
qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
|
|
return 0;
|
|
}
|
|
|
|
static int net_socket_connect_init(VLANState *vlan,
|
|
const char *model,
|
|
const char *name,
|
|
const char *host_str)
|
|
{
|
|
NetSocketState *s;
|
|
int fd, connected, ret, err;
|
|
struct sockaddr_in saddr;
|
|
|
|
if (parse_host_port(&saddr, host_str) < 0)
|
|
return -1;
|
|
|
|
fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
|
|
if (fd < 0) {
|
|
perror("socket");
|
|
return -1;
|
|
}
|
|
socket_set_nonblock(fd);
|
|
|
|
connected = 0;
|
|
for(;;) {
|
|
ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
|
|
if (ret < 0) {
|
|
err = socket_error();
|
|
if (err == EINTR || err == EWOULDBLOCK) {
|
|
} else if (err == EINPROGRESS) {
|
|
break;
|
|
#ifdef _WIN32
|
|
} else if (err == WSAEALREADY) {
|
|
break;
|
|
#endif
|
|
} else {
|
|
perror("connect");
|
|
closesocket(fd);
|
|
return -1;
|
|
}
|
|
} else {
|
|
connected = 1;
|
|
break;
|
|
}
|
|
}
|
|
s = net_socket_fd_init(vlan, model, name, fd, connected);
|
|
if (!s)
|
|
return -1;
|
|
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
|
"socket: connect to %s:%d",
|
|
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
|
|
return 0;
|
|
}
|
|
|
|
static int net_socket_mcast_init(VLANState *vlan,
|
|
const char *model,
|
|
const char *name,
|
|
const char *host_str)
|
|
{
|
|
NetSocketState *s;
|
|
int fd;
|
|
struct sockaddr_in saddr;
|
|
|
|
if (parse_host_port(&saddr, host_str) < 0)
|
|
return -1;
|
|
|
|
|
|
fd = net_socket_mcast_create(&saddr);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
s = net_socket_fd_init(vlan, model, name, fd, 0);
|
|
if (!s)
|
|
return -1;
|
|
|
|
s->dgram_dst = saddr;
|
|
|
|
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
|
"socket: mcast=%s:%d",
|
|
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
|
|
return 0;
|
|
|
|
}
|
|
|
|
int net_init_socket(QemuOpts *opts,
|
|
Monitor *mon,
|
|
const char *name,
|
|
VLANState *vlan)
|
|
{
|
|
if (qemu_opt_get(opts, "fd")) {
|
|
int fd;
|
|
|
|
if (qemu_opt_get(opts, "listen") ||
|
|
qemu_opt_get(opts, "connect") ||
|
|
qemu_opt_get(opts, "mcast")) {
|
|
qemu_error("listen=, connect= and mcast= is invalid with fd=\n");
|
|
return -1;
|
|
}
|
|
|
|
fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
|
|
if (fd == -1) {
|
|
return -1;
|
|
}
|
|
|
|
if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) {
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
} else if (qemu_opt_get(opts, "listen")) {
|
|
const char *listen;
|
|
|
|
if (qemu_opt_get(opts, "fd") ||
|
|
qemu_opt_get(opts, "connect") ||
|
|
qemu_opt_get(opts, "mcast")) {
|
|
qemu_error("fd=, connect= and mcast= is invalid with listen=\n");
|
|
return -1;
|
|
}
|
|
|
|
listen = qemu_opt_get(opts, "listen");
|
|
|
|
if (net_socket_listen_init(vlan, "socket", name, listen) == -1) {
|
|
return -1;
|
|
}
|
|
} else if (qemu_opt_get(opts, "connect")) {
|
|
const char *connect;
|
|
|
|
if (qemu_opt_get(opts, "fd") ||
|
|
qemu_opt_get(opts, "listen") ||
|
|
qemu_opt_get(opts, "mcast")) {
|
|
qemu_error("fd=, listen= and mcast= is invalid with connect=\n");
|
|
return -1;
|
|
}
|
|
|
|
connect = qemu_opt_get(opts, "connect");
|
|
|
|
if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
|
|
return -1;
|
|
}
|
|
} else if (qemu_opt_get(opts, "mcast")) {
|
|
const char *mcast;
|
|
|
|
if (qemu_opt_get(opts, "fd") ||
|
|
qemu_opt_get(opts, "connect") ||
|
|
qemu_opt_get(opts, "listen")) {
|
|
qemu_error("fd=, connect= and listen= is invalid with mcast=\n");
|
|
return -1;
|
|
}
|
|
|
|
mcast = qemu_opt_get(opts, "mcast");
|
|
|
|
if (net_socket_mcast_init(vlan, "socket", name, mcast) == -1) {
|
|
return -1;
|
|
}
|
|
} else {
|
|
qemu_error("-socket requires fd=, listen=, connect= or mcast=\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|