Just go always through the err label. (Noticed because Coverity complains that peer is always non-NULL in the error cleanup code, but removing the "if" is arguably more prone to introducing the opposite bug in the future). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
1133 lines
31 KiB
C
1133 lines
31 KiB
C
/*
|
|
* inet and unix socket functions for qemu
|
|
*
|
|
* (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; under version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*/
|
|
#include "qemu/osdep.h"
|
|
|
|
#include "monitor/monitor.h"
|
|
#include "qemu/sockets.h"
|
|
#include "qemu/main-loop.h"
|
|
#include "qapi/qmp-input-visitor.h"
|
|
#include "qapi/qmp-output-visitor.h"
|
|
#include "qapi-visit.h"
|
|
|
|
#ifndef AI_ADDRCONFIG
|
|
# define AI_ADDRCONFIG 0
|
|
#endif
|
|
#ifndef AI_V4MAPPED
|
|
# define AI_V4MAPPED 0
|
|
#endif
|
|
|
|
|
|
static int inet_getport(struct addrinfo *e)
|
|
{
|
|
struct sockaddr_in *i4;
|
|
struct sockaddr_in6 *i6;
|
|
|
|
switch (e->ai_family) {
|
|
case PF_INET6:
|
|
i6 = (void*)e->ai_addr;
|
|
return ntohs(i6->sin6_port);
|
|
case PF_INET:
|
|
i4 = (void*)e->ai_addr;
|
|
return ntohs(i4->sin_port);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void inet_setport(struct addrinfo *e, int port)
|
|
{
|
|
struct sockaddr_in *i4;
|
|
struct sockaddr_in6 *i6;
|
|
|
|
switch (e->ai_family) {
|
|
case PF_INET6:
|
|
i6 = (void*)e->ai_addr;
|
|
i6->sin6_port = htons(port);
|
|
break;
|
|
case PF_INET:
|
|
i4 = (void*)e->ai_addr;
|
|
i4->sin_port = htons(port);
|
|
break;
|
|
}
|
|
}
|
|
|
|
NetworkAddressFamily inet_netfamily(int family)
|
|
{
|
|
switch (family) {
|
|
case PF_INET6: return NETWORK_ADDRESS_FAMILY_IPV6;
|
|
case PF_INET: return NETWORK_ADDRESS_FAMILY_IPV4;
|
|
case PF_UNIX: return NETWORK_ADDRESS_FAMILY_UNIX;
|
|
}
|
|
return NETWORK_ADDRESS_FAMILY_UNKNOWN;
|
|
}
|
|
|
|
/*
|
|
* Matrix we're trying to apply
|
|
*
|
|
* ipv4 ipv6 family
|
|
* - - PF_UNSPEC
|
|
* - f PF_INET
|
|
* - t PF_INET6
|
|
* f - PF_INET6
|
|
* f f <error>
|
|
* f t PF_INET6
|
|
* t - PF_INET
|
|
* t f PF_INET
|
|
* t t PF_INET6
|
|
*
|
|
* NB, this matrix is only about getting the neccessary results
|
|
* from getaddrinfo(). Some of the cases require further work
|
|
* after reading results from getaddrinfo in order to fully
|
|
* apply the logic the end user wants. eg with the last case
|
|
* ipv4=t + ipv6=t + PF_INET6, getaddrinfo alone can only
|
|
* guarantee the ipv6=t part of the request - we need more
|
|
* checks to provide ipv4=t part of the guarantee. This is
|
|
* outside scope of this method and not currently handled by
|
|
* callers at all.
|
|
*/
|
|
static int inet_ai_family_from_address(InetSocketAddress *addr,
|
|
Error **errp)
|
|
{
|
|
if (addr->has_ipv6 && addr->has_ipv4 &&
|
|
!addr->ipv6 && !addr->ipv4) {
|
|
error_setg(errp, "Cannot disable IPv4 and IPv6 at same time");
|
|
return PF_UNSPEC;
|
|
}
|
|
if ((addr->has_ipv6 && addr->ipv6) || (addr->has_ipv4 && !addr->ipv4)) {
|
|
return PF_INET6;
|
|
}
|
|
if ((addr->has_ipv4 && addr->ipv4) || (addr->has_ipv6 && !addr->ipv6)) {
|
|
return PF_INET;
|
|
}
|
|
return PF_UNSPEC;
|
|
}
|
|
|
|
static int inet_listen_saddr(InetSocketAddress *saddr,
|
|
int port_offset,
|
|
bool update_addr,
|
|
Error **errp)
|
|
{
|
|
struct addrinfo ai,*res,*e;
|
|
char port[33];
|
|
char uaddr[INET6_ADDRSTRLEN+1];
|
|
char uport[33];
|
|
int slisten, rc, port_min, port_max, p;
|
|
Error *err = NULL;
|
|
|
|
memset(&ai,0, sizeof(ai));
|
|
ai.ai_flags = AI_PASSIVE;
|
|
ai.ai_family = inet_ai_family_from_address(saddr, &err);
|
|
ai.ai_socktype = SOCK_STREAM;
|
|
|
|
if (err) {
|
|
error_propagate(errp, err);
|
|
return -1;
|
|
}
|
|
|
|
if (saddr->host == NULL) {
|
|
error_setg(errp, "host not specified");
|
|
return -1;
|
|
}
|
|
if (saddr->port != NULL) {
|
|
pstrcpy(port, sizeof(port), saddr->port);
|
|
} else {
|
|
port[0] = '\0';
|
|
}
|
|
|
|
/* lookup */
|
|
if (port_offset) {
|
|
unsigned long long baseport;
|
|
if (strlen(port) == 0) {
|
|
error_setg(errp, "port not specified");
|
|
return -1;
|
|
}
|
|
if (parse_uint_full(port, &baseport, 10) < 0) {
|
|
error_setg(errp, "can't convert to a number: %s", port);
|
|
return -1;
|
|
}
|
|
if (baseport > 65535 ||
|
|
baseport + port_offset > 65535) {
|
|
error_setg(errp, "port %s out of range", port);
|
|
return -1;
|
|
}
|
|
snprintf(port, sizeof(port), "%d", (int)baseport + port_offset);
|
|
}
|
|
rc = getaddrinfo(strlen(saddr->host) ? saddr->host : NULL,
|
|
strlen(port) ? port : NULL, &ai, &res);
|
|
if (rc != 0) {
|
|
error_setg(errp, "address resolution failed for %s:%s: %s",
|
|
saddr->host, port, gai_strerror(rc));
|
|
return -1;
|
|
}
|
|
|
|
/* create socket + bind */
|
|
for (e = res; e != NULL; e = e->ai_next) {
|
|
getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
|
|
uaddr,INET6_ADDRSTRLEN,uport,32,
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
|
|
if (slisten < 0) {
|
|
if (!e->ai_next) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
}
|
|
continue;
|
|
}
|
|
|
|
socket_set_fast_reuse(slisten);
|
|
#ifdef IPV6_V6ONLY
|
|
if (e->ai_family == PF_INET6) {
|
|
/* listen on both ipv4 and ipv6 */
|
|
const int off = 0;
|
|
qemu_setsockopt(slisten, IPPROTO_IPV6, IPV6_V6ONLY, &off,
|
|
sizeof(off));
|
|
}
|
|
#endif
|
|
|
|
port_min = inet_getport(e);
|
|
port_max = saddr->has_to ? saddr->to + port_offset : port_min;
|
|
for (p = port_min; p <= port_max; p++) {
|
|
inet_setport(e, p);
|
|
if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {
|
|
goto listen;
|
|
}
|
|
if (p == port_max) {
|
|
if (!e->ai_next) {
|
|
error_setg_errno(errp, errno, "Failed to bind socket");
|
|
}
|
|
}
|
|
}
|
|
closesocket(slisten);
|
|
}
|
|
freeaddrinfo(res);
|
|
return -1;
|
|
|
|
listen:
|
|
if (listen(slisten,1) != 0) {
|
|
error_setg_errno(errp, errno, "Failed to listen on socket");
|
|
closesocket(slisten);
|
|
freeaddrinfo(res);
|
|
return -1;
|
|
}
|
|
if (update_addr) {
|
|
g_free(saddr->host);
|
|
saddr->host = g_strdup(uaddr);
|
|
g_free(saddr->port);
|
|
saddr->port = g_strdup_printf("%d",
|
|
inet_getport(e) - port_offset);
|
|
saddr->has_ipv6 = saddr->ipv6 = e->ai_family == PF_INET6;
|
|
saddr->has_ipv4 = saddr->ipv4 = e->ai_family != PF_INET6;
|
|
}
|
|
freeaddrinfo(res);
|
|
return slisten;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
#define QEMU_SOCKET_RC_INPROGRESS(rc) \
|
|
((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY)
|
|
#else
|
|
#define QEMU_SOCKET_RC_INPROGRESS(rc) \
|
|
((rc) == -EINPROGRESS)
|
|
#endif
|
|
|
|
/* Struct to store connect state for non blocking connect */
|
|
typedef struct ConnectState {
|
|
int fd;
|
|
struct addrinfo *addr_list;
|
|
struct addrinfo *current_addr;
|
|
NonBlockingConnectHandler *callback;
|
|
void *opaque;
|
|
} ConnectState;
|
|
|
|
static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,
|
|
ConnectState *connect_state, Error **errp);
|
|
|
|
static void wait_for_connect(void *opaque)
|
|
{
|
|
ConnectState *s = opaque;
|
|
int val = 0, rc = 0;
|
|
socklen_t valsize = sizeof(val);
|
|
bool in_progress;
|
|
Error *err = NULL;
|
|
|
|
qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
|
|
|
|
do {
|
|
rc = qemu_getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &val, &valsize);
|
|
} while (rc == -1 && socket_error() == EINTR);
|
|
|
|
/* update rc to contain error */
|
|
if (!rc && val) {
|
|
rc = -1;
|
|
errno = val;
|
|
}
|
|
|
|
/* connect error */
|
|
if (rc < 0) {
|
|
error_setg_errno(&err, errno, "Error connecting to socket");
|
|
closesocket(s->fd);
|
|
s->fd = rc;
|
|
}
|
|
|
|
/* try to connect to the next address on the list */
|
|
if (s->current_addr) {
|
|
while (s->current_addr->ai_next != NULL && s->fd < 0) {
|
|
s->current_addr = s->current_addr->ai_next;
|
|
s->fd = inet_connect_addr(s->current_addr, &in_progress, s, NULL);
|
|
if (s->fd < 0) {
|
|
error_free(err);
|
|
err = NULL;
|
|
error_setg_errno(&err, errno, "Unable to start socket connect");
|
|
}
|
|
/* connect in progress */
|
|
if (in_progress) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
freeaddrinfo(s->addr_list);
|
|
}
|
|
|
|
if (s->callback) {
|
|
s->callback(s->fd, err, s->opaque);
|
|
}
|
|
g_free(s);
|
|
out:
|
|
error_free(err);
|
|
}
|
|
|
|
static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,
|
|
ConnectState *connect_state, Error **errp)
|
|
{
|
|
int sock, rc;
|
|
|
|
*in_progress = false;
|
|
|
|
sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
return -1;
|
|
}
|
|
socket_set_fast_reuse(sock);
|
|
if (connect_state != NULL) {
|
|
qemu_set_nonblock(sock);
|
|
}
|
|
/* connect to peer */
|
|
do {
|
|
rc = 0;
|
|
if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {
|
|
rc = -socket_error();
|
|
}
|
|
} while (rc == -EINTR);
|
|
|
|
if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {
|
|
connect_state->fd = sock;
|
|
qemu_set_fd_handler(sock, NULL, wait_for_connect, connect_state);
|
|
*in_progress = true;
|
|
} else if (rc < 0) {
|
|
error_setg_errno(errp, errno, "Failed to connect socket");
|
|
closesocket(sock);
|
|
return -1;
|
|
}
|
|
return sock;
|
|
}
|
|
|
|
static struct addrinfo *inet_parse_connect_saddr(InetSocketAddress *saddr,
|
|
Error **errp)
|
|
{
|
|
struct addrinfo ai, *res;
|
|
int rc;
|
|
Error *err = NULL;
|
|
|
|
memset(&ai, 0, sizeof(ai));
|
|
|
|
ai.ai_flags = AI_CANONNAME | AI_V4MAPPED | AI_ADDRCONFIG;
|
|
ai.ai_family = inet_ai_family_from_address(saddr, &err);
|
|
ai.ai_socktype = SOCK_STREAM;
|
|
|
|
if (err) {
|
|
error_propagate(errp, err);
|
|
return NULL;
|
|
}
|
|
|
|
if (saddr->host == NULL || saddr->port == NULL) {
|
|
error_setg(errp, "host and/or port not specified");
|
|
return NULL;
|
|
}
|
|
|
|
/* lookup */
|
|
rc = getaddrinfo(saddr->host, saddr->port, &ai, &res);
|
|
if (rc != 0) {
|
|
error_setg(errp, "address resolution failed for %s:%s: %s",
|
|
saddr->host, saddr->port, gai_strerror(rc));
|
|
return NULL;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Create a socket and connect it to an address.
|
|
*
|
|
* @saddr: Inet socket address specification
|
|
* @errp: set on error
|
|
* @callback: callback function for non-blocking connect
|
|
* @opaque: opaque for callback function
|
|
*
|
|
* Returns: -1 on error, file descriptor on success.
|
|
*
|
|
* If @callback is non-null, the connect is non-blocking. If this
|
|
* function succeeds, callback will be called when the connection
|
|
* completes, with the file descriptor on success, or -1 on error.
|
|
*/
|
|
static int inet_connect_saddr(InetSocketAddress *saddr, Error **errp,
|
|
NonBlockingConnectHandler *callback, void *opaque)
|
|
{
|
|
Error *local_err = NULL;
|
|
struct addrinfo *res, *e;
|
|
int sock = -1;
|
|
bool in_progress;
|
|
ConnectState *connect_state = NULL;
|
|
|
|
res = inet_parse_connect_saddr(saddr, errp);
|
|
if (!res) {
|
|
return -1;
|
|
}
|
|
|
|
if (callback != NULL) {
|
|
connect_state = g_malloc0(sizeof(*connect_state));
|
|
connect_state->addr_list = res;
|
|
connect_state->callback = callback;
|
|
connect_state->opaque = opaque;
|
|
}
|
|
|
|
for (e = res; e != NULL; e = e->ai_next) {
|
|
error_free(local_err);
|
|
local_err = NULL;
|
|
if (connect_state != NULL) {
|
|
connect_state->current_addr = e;
|
|
}
|
|
sock = inet_connect_addr(e, &in_progress, connect_state, &local_err);
|
|
if (sock >= 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (sock < 0) {
|
|
error_propagate(errp, local_err);
|
|
} else if (in_progress) {
|
|
/* wait_for_connect() will do the rest */
|
|
return sock;
|
|
} else {
|
|
if (callback) {
|
|
callback(sock, NULL, opaque);
|
|
}
|
|
}
|
|
g_free(connect_state);
|
|
freeaddrinfo(res);
|
|
return sock;
|
|
}
|
|
|
|
static int inet_dgram_saddr(InetSocketAddress *sraddr,
|
|
InetSocketAddress *sladdr,
|
|
Error **errp)
|
|
{
|
|
struct addrinfo ai, *peer = NULL, *local = NULL;
|
|
const char *addr;
|
|
const char *port;
|
|
int sock = -1, rc;
|
|
Error *err = NULL;
|
|
|
|
/* lookup peer addr */
|
|
memset(&ai,0, sizeof(ai));
|
|
ai.ai_flags = AI_CANONNAME | AI_V4MAPPED | AI_ADDRCONFIG;
|
|
ai.ai_family = inet_ai_family_from_address(sraddr, &err);
|
|
ai.ai_socktype = SOCK_DGRAM;
|
|
|
|
if (err) {
|
|
error_propagate(errp, err);
|
|
goto err;
|
|
}
|
|
|
|
addr = sraddr->host;
|
|
port = sraddr->port;
|
|
if (addr == NULL || strlen(addr) == 0) {
|
|
addr = "localhost";
|
|
}
|
|
if (port == NULL || strlen(port) == 0) {
|
|
error_setg(errp, "remote port not specified");
|
|
goto err;
|
|
}
|
|
|
|
if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
|
|
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
|
gai_strerror(rc));
|
|
goto err;
|
|
}
|
|
|
|
/* lookup local addr */
|
|
memset(&ai,0, sizeof(ai));
|
|
ai.ai_flags = AI_PASSIVE;
|
|
ai.ai_family = peer->ai_family;
|
|
ai.ai_socktype = SOCK_DGRAM;
|
|
|
|
if (sladdr) {
|
|
addr = sladdr->host;
|
|
port = sladdr->port;
|
|
if (addr == NULL || strlen(addr) == 0) {
|
|
addr = NULL;
|
|
}
|
|
if (!port || strlen(port) == 0) {
|
|
port = "0";
|
|
}
|
|
} else {
|
|
addr = NULL;
|
|
port = "0";
|
|
}
|
|
|
|
if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
|
|
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
|
gai_strerror(rc));
|
|
goto err;
|
|
}
|
|
|
|
/* create socket */
|
|
sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
goto err;
|
|
}
|
|
socket_set_fast_reuse(sock);
|
|
|
|
/* bind socket */
|
|
if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
|
|
error_setg_errno(errp, errno, "Failed to bind socket");
|
|
goto err;
|
|
}
|
|
|
|
/* connect to peer */
|
|
if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
|
|
error_setg_errno(errp, errno, "Failed to connect socket");
|
|
goto err;
|
|
}
|
|
|
|
freeaddrinfo(local);
|
|
freeaddrinfo(peer);
|
|
return sock;
|
|
|
|
err:
|
|
if (-1 != sock)
|
|
closesocket(sock);
|
|
if (local)
|
|
freeaddrinfo(local);
|
|
if (peer)
|
|
freeaddrinfo(peer);
|
|
return -1;
|
|
}
|
|
|
|
/* compatibility wrapper */
|
|
InetSocketAddress *inet_parse(const char *str, Error **errp)
|
|
{
|
|
InetSocketAddress *addr;
|
|
const char *optstr, *h;
|
|
char host[65];
|
|
char port[33];
|
|
int to;
|
|
int pos;
|
|
|
|
addr = g_new0(InetSocketAddress, 1);
|
|
|
|
/* parse address */
|
|
if (str[0] == ':') {
|
|
/* no host given */
|
|
host[0] = '\0';
|
|
if (1 != sscanf(str, ":%32[^,]%n", port, &pos)) {
|
|
error_setg(errp, "error parsing port in address '%s'", str);
|
|
goto fail;
|
|
}
|
|
} else if (str[0] == '[') {
|
|
/* IPv6 addr */
|
|
if (2 != sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos)) {
|
|
error_setg(errp, "error parsing IPv6 address '%s'", str);
|
|
goto fail;
|
|
}
|
|
addr->ipv6 = addr->has_ipv6 = true;
|
|
} else {
|
|
/* hostname or IPv4 addr */
|
|
if (2 != sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos)) {
|
|
error_setg(errp, "error parsing address '%s'", str);
|
|
goto fail;
|
|
}
|
|
if (host[strspn(host, "0123456789.")] == '\0') {
|
|
addr->ipv4 = addr->has_ipv4 = true;
|
|
}
|
|
}
|
|
|
|
addr->host = g_strdup(host);
|
|
addr->port = g_strdup(port);
|
|
|
|
/* parse options */
|
|
optstr = str + pos;
|
|
h = strstr(optstr, ",to=");
|
|
if (h) {
|
|
h += 4;
|
|
if (sscanf(h, "%d%n", &to, &pos) != 1 ||
|
|
(h[pos] != '\0' && h[pos] != ',')) {
|
|
error_setg(errp, "error parsing to= argument");
|
|
goto fail;
|
|
}
|
|
addr->has_to = true;
|
|
addr->to = to;
|
|
}
|
|
if (strstr(optstr, ",ipv4")) {
|
|
addr->ipv4 = addr->has_ipv4 = true;
|
|
}
|
|
if (strstr(optstr, ",ipv6")) {
|
|
addr->ipv6 = addr->has_ipv6 = true;
|
|
}
|
|
return addr;
|
|
|
|
fail:
|
|
qapi_free_InetSocketAddress(addr);
|
|
return NULL;
|
|
}
|
|
|
|
int inet_listen(const char *str, char *ostr, int olen,
|
|
int socktype, int port_offset, Error **errp)
|
|
{
|
|
char *optstr;
|
|
int sock = -1;
|
|
InetSocketAddress *addr;
|
|
|
|
addr = inet_parse(str, errp);
|
|
if (addr != NULL) {
|
|
sock = inet_listen_saddr(addr, port_offset, true, errp);
|
|
if (sock != -1 && ostr) {
|
|
optstr = strchr(str, ',');
|
|
if (addr->ipv6) {
|
|
snprintf(ostr, olen, "[%s]:%s%s",
|
|
addr->host,
|
|
addr->port,
|
|
optstr ? optstr : "");
|
|
} else {
|
|
snprintf(ostr, olen, "%s:%s%s",
|
|
addr->host,
|
|
addr->port,
|
|
optstr ? optstr : "");
|
|
}
|
|
}
|
|
qapi_free_InetSocketAddress(addr);
|
|
}
|
|
return sock;
|
|
}
|
|
|
|
/**
|
|
* Create a blocking socket and connect it to an address.
|
|
*
|
|
* @str: address string
|
|
* @errp: set in case of an error
|
|
*
|
|
* Returns -1 in case of error, file descriptor on success
|
|
**/
|
|
int inet_connect(const char *str, Error **errp)
|
|
{
|
|
int sock = -1;
|
|
InetSocketAddress *addr;
|
|
|
|
addr = inet_parse(str, errp);
|
|
if (addr != NULL) {
|
|
sock = inet_connect_saddr(addr, errp, NULL, NULL);
|
|
qapi_free_InetSocketAddress(addr);
|
|
}
|
|
return sock;
|
|
}
|
|
|
|
/**
|
|
* Create a non-blocking socket and connect it to an address.
|
|
* Calls the callback function with fd in case of success or -1 in case of
|
|
* error.
|
|
*
|
|
* @str: address string
|
|
* @callback: callback function that is called when connect completes,
|
|
* cannot be NULL.
|
|
* @opaque: opaque for callback function
|
|
* @errp: set in case of an error
|
|
*
|
|
* Returns: -1 on immediate error, file descriptor on success.
|
|
**/
|
|
int inet_nonblocking_connect(const char *str,
|
|
NonBlockingConnectHandler *callback,
|
|
void *opaque, Error **errp)
|
|
{
|
|
int sock = -1;
|
|
InetSocketAddress *addr;
|
|
|
|
g_assert(callback != NULL);
|
|
|
|
addr = inet_parse(str, errp);
|
|
if (addr != NULL) {
|
|
sock = inet_connect_saddr(addr, errp, callback, opaque);
|
|
qapi_free_InetSocketAddress(addr);
|
|
}
|
|
return sock;
|
|
}
|
|
|
|
#ifndef _WIN32
|
|
|
|
static int unix_listen_saddr(UnixSocketAddress *saddr,
|
|
bool update_addr,
|
|
Error **errp)
|
|
{
|
|
struct sockaddr_un un;
|
|
int sock, fd;
|
|
|
|
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create Unix socket");
|
|
return -1;
|
|
}
|
|
|
|
memset(&un, 0, sizeof(un));
|
|
un.sun_family = AF_UNIX;
|
|
if (saddr->path && strlen(saddr->path)) {
|
|
snprintf(un.sun_path, sizeof(un.sun_path), "%s", saddr->path);
|
|
} else {
|
|
const char *tmpdir = getenv("TMPDIR");
|
|
tmpdir = tmpdir ? tmpdir : "/tmp";
|
|
if (snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",
|
|
tmpdir) >= sizeof(un.sun_path)) {
|
|
error_setg_errno(errp, errno,
|
|
"TMPDIR environment variable (%s) too large", tmpdir);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* This dummy fd usage silences the mktemp() unsecure warning.
|
|
* Using mkstemp() doesn't make things more secure here
|
|
* though. bind() complains about existing files, so we have
|
|
* to unlink first and thus re-open the race window. The
|
|
* worst case possible is bind() failing, i.e. a DoS attack.
|
|
*/
|
|
fd = mkstemp(un.sun_path);
|
|
if (fd < 0) {
|
|
error_setg_errno(errp, errno,
|
|
"Failed to make a temporary socket name in %s", tmpdir);
|
|
goto err;
|
|
}
|
|
close(fd);
|
|
if (update_addr) {
|
|
g_free(saddr->path);
|
|
saddr->path = g_strdup(un.sun_path);
|
|
}
|
|
}
|
|
|
|
if (unlink(un.sun_path) < 0 && errno != ENOENT) {
|
|
error_setg_errno(errp, errno,
|
|
"Failed to unlink socket %s", un.sun_path);
|
|
goto err;
|
|
}
|
|
if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
|
|
error_setg_errno(errp, errno, "Failed to bind socket to %s", un.sun_path);
|
|
goto err;
|
|
}
|
|
if (listen(sock, 1) < 0) {
|
|
error_setg_errno(errp, errno, "Failed to listen on socket");
|
|
goto err;
|
|
}
|
|
|
|
return sock;
|
|
|
|
err:
|
|
closesocket(sock);
|
|
return -1;
|
|
}
|
|
|
|
static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp,
|
|
NonBlockingConnectHandler *callback, void *opaque)
|
|
{
|
|
struct sockaddr_un un;
|
|
ConnectState *connect_state = NULL;
|
|
int sock, rc;
|
|
|
|
if (saddr->path == NULL) {
|
|
error_setg(errp, "unix connect: no path specified");
|
|
return -1;
|
|
}
|
|
|
|
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
return -1;
|
|
}
|
|
if (callback != NULL) {
|
|
connect_state = g_malloc0(sizeof(*connect_state));
|
|
connect_state->callback = callback;
|
|
connect_state->opaque = opaque;
|
|
qemu_set_nonblock(sock);
|
|
}
|
|
|
|
memset(&un, 0, sizeof(un));
|
|
un.sun_family = AF_UNIX;
|
|
snprintf(un.sun_path, sizeof(un.sun_path), "%s", saddr->path);
|
|
|
|
/* connect to peer */
|
|
do {
|
|
rc = 0;
|
|
if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) {
|
|
rc = -socket_error();
|
|
}
|
|
} while (rc == -EINTR);
|
|
|
|
if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {
|
|
connect_state->fd = sock;
|
|
qemu_set_fd_handler(sock, NULL, wait_for_connect, connect_state);
|
|
return sock;
|
|
} else if (rc >= 0) {
|
|
/* non blocking socket immediate success, call callback */
|
|
if (callback != NULL) {
|
|
callback(sock, NULL, opaque);
|
|
}
|
|
}
|
|
|
|
if (rc < 0) {
|
|
error_setg_errno(errp, -rc, "Failed to connect socket");
|
|
close(sock);
|
|
sock = -1;
|
|
}
|
|
|
|
g_free(connect_state);
|
|
return sock;
|
|
}
|
|
|
|
#else
|
|
|
|
static int unix_listen_saddr(UnixSocketAddress *saddr,
|
|
bool update_addr,
|
|
Error **errp)
|
|
{
|
|
error_setg(errp, "unix sockets are not available on windows");
|
|
errno = ENOTSUP;
|
|
return -1;
|
|
}
|
|
|
|
static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp,
|
|
NonBlockingConnectHandler *callback, void *opaque)
|
|
{
|
|
error_setg(errp, "unix sockets are not available on windows");
|
|
errno = ENOTSUP;
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
/* compatibility wrapper */
|
|
int unix_listen(const char *str, char *ostr, int olen, Error **errp)
|
|
{
|
|
char *path, *optstr;
|
|
int sock, len;
|
|
UnixSocketAddress *saddr;
|
|
|
|
saddr = g_new0(UnixSocketAddress, 1);
|
|
|
|
optstr = strchr(str, ',');
|
|
if (optstr) {
|
|
len = optstr - str;
|
|
if (len) {
|
|
path = g_malloc(len+1);
|
|
snprintf(path, len+1, "%.*s", len, str);
|
|
saddr->path = path;
|
|
}
|
|
} else {
|
|
saddr->path = g_strdup(str);
|
|
}
|
|
|
|
sock = unix_listen_saddr(saddr, true, errp);
|
|
|
|
if (sock != -1 && ostr)
|
|
snprintf(ostr, olen, "%s%s", saddr->path, optstr ? optstr : "");
|
|
qapi_free_UnixSocketAddress(saddr);
|
|
return sock;
|
|
}
|
|
|
|
int unix_connect(const char *path, Error **errp)
|
|
{
|
|
UnixSocketAddress *saddr;
|
|
int sock;
|
|
|
|
saddr = g_new0(UnixSocketAddress, 1);
|
|
saddr->path = g_strdup(path);
|
|
sock = unix_connect_saddr(saddr, errp, NULL, NULL);
|
|
qapi_free_UnixSocketAddress(saddr);
|
|
return sock;
|
|
}
|
|
|
|
|
|
int unix_nonblocking_connect(const char *path,
|
|
NonBlockingConnectHandler *callback,
|
|
void *opaque, Error **errp)
|
|
{
|
|
UnixSocketAddress *saddr;
|
|
int sock = -1;
|
|
|
|
g_assert(callback != NULL);
|
|
|
|
saddr = g_new0(UnixSocketAddress, 1);
|
|
saddr->path = g_strdup(path);
|
|
sock = unix_connect_saddr(saddr, errp, callback, opaque);
|
|
qapi_free_UnixSocketAddress(saddr);
|
|
return sock;
|
|
}
|
|
|
|
SocketAddress *socket_parse(const char *str, Error **errp)
|
|
{
|
|
SocketAddress *addr;
|
|
|
|
addr = g_new0(SocketAddress, 1);
|
|
if (strstart(str, "unix:", NULL)) {
|
|
if (str[5] == '\0') {
|
|
error_setg(errp, "invalid Unix socket address");
|
|
goto fail;
|
|
} else {
|
|
addr->type = SOCKET_ADDRESS_KIND_UNIX;
|
|
addr->u.q_unix = g_new(UnixSocketAddress, 1);
|
|
addr->u.q_unix->path = g_strdup(str + 5);
|
|
}
|
|
} else if (strstart(str, "fd:", NULL)) {
|
|
if (str[3] == '\0') {
|
|
error_setg(errp, "invalid file descriptor address");
|
|
goto fail;
|
|
} else {
|
|
addr->type = SOCKET_ADDRESS_KIND_FD;
|
|
addr->u.fd = g_new(String, 1);
|
|
addr->u.fd->str = g_strdup(str + 3);
|
|
}
|
|
} else {
|
|
addr->type = SOCKET_ADDRESS_KIND_INET;
|
|
addr->u.inet = inet_parse(str, errp);
|
|
if (addr->u.inet == NULL) {
|
|
goto fail;
|
|
}
|
|
}
|
|
return addr;
|
|
|
|
fail:
|
|
qapi_free_SocketAddress(addr);
|
|
return NULL;
|
|
}
|
|
|
|
int socket_connect(SocketAddress *addr, Error **errp,
|
|
NonBlockingConnectHandler *callback, void *opaque)
|
|
{
|
|
int fd;
|
|
|
|
switch (addr->type) {
|
|
case SOCKET_ADDRESS_KIND_INET:
|
|
fd = inet_connect_saddr(addr->u.inet, errp, callback, opaque);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_KIND_UNIX:
|
|
fd = unix_connect_saddr(addr->u.q_unix, errp, callback, opaque);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_KIND_FD:
|
|
fd = monitor_get_fd(cur_mon, addr->u.fd->str, errp);
|
|
if (fd >= 0 && callback) {
|
|
qemu_set_nonblock(fd);
|
|
callback(fd, NULL, opaque);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
int socket_listen(SocketAddress *addr, Error **errp)
|
|
{
|
|
int fd;
|
|
|
|
switch (addr->type) {
|
|
case SOCKET_ADDRESS_KIND_INET:
|
|
fd = inet_listen_saddr(addr->u.inet, 0, false, errp);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_KIND_UNIX:
|
|
fd = unix_listen_saddr(addr->u.q_unix, false, errp);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_KIND_FD:
|
|
fd = monitor_get_fd(cur_mon, addr->u.fd->str, errp);
|
|
break;
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp)
|
|
{
|
|
int fd;
|
|
|
|
switch (remote->type) {
|
|
case SOCKET_ADDRESS_KIND_INET:
|
|
fd = inet_dgram_saddr(remote->u.inet, local ? local->u.inet : NULL, errp);
|
|
break;
|
|
|
|
default:
|
|
error_setg(errp, "socket type unsupported for datagram");
|
|
fd = -1;
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
|
|
static SocketAddress *
|
|
socket_sockaddr_to_address_inet(struct sockaddr_storage *sa,
|
|
socklen_t salen,
|
|
Error **errp)
|
|
{
|
|
char host[NI_MAXHOST];
|
|
char serv[NI_MAXSERV];
|
|
SocketAddress *addr;
|
|
int ret;
|
|
|
|
ret = getnameinfo((struct sockaddr *)sa, salen,
|
|
host, sizeof(host),
|
|
serv, sizeof(serv),
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
if (ret != 0) {
|
|
error_setg(errp, "Cannot format numeric socket address: %s",
|
|
gai_strerror(ret));
|
|
return NULL;
|
|
}
|
|
|
|
addr = g_new0(SocketAddress, 1);
|
|
addr->type = SOCKET_ADDRESS_KIND_INET;
|
|
addr->u.inet = g_new0(InetSocketAddress, 1);
|
|
addr->u.inet->host = g_strdup(host);
|
|
addr->u.inet->port = g_strdup(serv);
|
|
if (sa->ss_family == AF_INET) {
|
|
addr->u.inet->has_ipv4 = addr->u.inet->ipv4 = true;
|
|
} else {
|
|
addr->u.inet->has_ipv6 = addr->u.inet->ipv6 = true;
|
|
}
|
|
|
|
return addr;
|
|
}
|
|
|
|
|
|
#ifndef WIN32
|
|
static SocketAddress *
|
|
socket_sockaddr_to_address_unix(struct sockaddr_storage *sa,
|
|
socklen_t salen,
|
|
Error **errp)
|
|
{
|
|
SocketAddress *addr;
|
|
struct sockaddr_un *su = (struct sockaddr_un *)sa;
|
|
|
|
addr = g_new0(SocketAddress, 1);
|
|
addr->type = SOCKET_ADDRESS_KIND_UNIX;
|
|
addr->u.q_unix = g_new0(UnixSocketAddress, 1);
|
|
if (su->sun_path[0]) {
|
|
addr->u.q_unix->path = g_strndup(su->sun_path,
|
|
sizeof(su->sun_path));
|
|
}
|
|
|
|
return addr;
|
|
}
|
|
#endif /* WIN32 */
|
|
|
|
SocketAddress *
|
|
socket_sockaddr_to_address(struct sockaddr_storage *sa,
|
|
socklen_t salen,
|
|
Error **errp)
|
|
{
|
|
switch (sa->ss_family) {
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
return socket_sockaddr_to_address_inet(sa, salen, errp);
|
|
|
|
#ifndef WIN32
|
|
case AF_UNIX:
|
|
return socket_sockaddr_to_address_unix(sa, salen, errp);
|
|
#endif /* WIN32 */
|
|
|
|
default:
|
|
error_setg(errp, "socket family %d unsupported",
|
|
sa->ss_family);
|
|
return NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
SocketAddress *socket_local_address(int fd, Error **errp)
|
|
{
|
|
struct sockaddr_storage ss;
|
|
socklen_t sslen = sizeof(ss);
|
|
|
|
if (getsockname(fd, (struct sockaddr *)&ss, &sslen) < 0) {
|
|
error_setg_errno(errp, socket_error(), "%s",
|
|
"Unable to query local socket address");
|
|
return NULL;
|
|
}
|
|
|
|
return socket_sockaddr_to_address(&ss, sslen, errp);
|
|
}
|
|
|
|
|
|
SocketAddress *socket_remote_address(int fd, Error **errp)
|
|
{
|
|
struct sockaddr_storage ss;
|
|
socklen_t sslen = sizeof(ss);
|
|
|
|
if (getpeername(fd, (struct sockaddr *)&ss, &sslen) < 0) {
|
|
error_setg_errno(errp, socket_error(), "%s",
|
|
"Unable to query remote socket address");
|
|
return NULL;
|
|
}
|
|
|
|
return socket_sockaddr_to_address(&ss, sslen, errp);
|
|
}
|
|
|
|
|
|
void qapi_copy_SocketAddress(SocketAddress **p_dest,
|
|
SocketAddress *src)
|
|
{
|
|
QmpOutputVisitor *qov;
|
|
QmpInputVisitor *qiv;
|
|
Visitor *ov, *iv;
|
|
QObject *obj;
|
|
|
|
*p_dest = NULL;
|
|
|
|
qov = qmp_output_visitor_new();
|
|
ov = qmp_output_get_visitor(qov);
|
|
visit_type_SocketAddress(ov, NULL, &src, &error_abort);
|
|
obj = qmp_output_get_qobject(qov);
|
|
qmp_output_visitor_cleanup(qov);
|
|
if (!obj) {
|
|
return;
|
|
}
|
|
|
|
qiv = qmp_input_visitor_new(obj);
|
|
iv = qmp_input_get_visitor(qiv);
|
|
visit_type_SocketAddress(iv, NULL, p_dest, &error_abort);
|
|
qmp_input_visitor_cleanup(qiv);
|
|
qobject_decref(obj);
|
|
}
|