* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
+#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/timer.h"
-#include "char/char.h"
+#include "qemu/error-report.h"
+#include "sysemu/char.h"
#include "slirp.h"
#include "hw/hw.h"
+#include "qemu/cutils.h"
+
+#ifndef _WIN32
+#include <net/if.h>
+#endif
/* host loopback address */
struct in_addr loopback_addr;
0x52, 0x55, 0x00, 0x00, 0x00, 0x00
};
-static const uint8_t zero_ethaddr[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
-
-/* XXX: suppress those select globals */
-fd_set *global_readfds, *global_writefds, *global_xfds;
-
u_int curtime;
-static u_int time_fasttimo, last_slowtimo;
-static int do_slowtimo;
static QTAILQ_HEAD(slirp_instances, Slirp) slirp_instances =
QTAILQ_HEAD_INITIALIZER(slirp_instances);
static struct in_addr dns_addr;
+#ifndef _WIN32
+static struct in6_addr dns6_addr;
+#endif
static u_int dns_addr_time;
+#ifndef _WIN32
+static u_int dns6_addr_time;
+#endif
+
+#define TIMEOUT_FAST 2 /* milliseconds */
+#define TIMEOUT_SLOW 499 /* milliseconds */
+/* for the aging of certain requests like DNS */
+#define TIMEOUT_DEFAULT 1000 /* milliseconds */
#ifdef _WIN32
IP_ADDR_STRING *pIPAddr;
struct in_addr tmp_addr;
- if (dns_addr.s_addr != 0 && (curtime - dns_addr_time) < 1000) {
+ if (dns_addr.s_addr != 0 && (curtime - dns_addr_time) < TIMEOUT_DEFAULT) {
*pdns_addr = dns_addr;
return 0;
}
return 0;
}
+int get_dns6_addr(struct in6_addr *pdns6_addr, uint32_t *scope_id)
+{
+ return -1;
+}
+
static void winsock_cleanup(void)
{
WSACleanup();
#else
-static struct stat dns_addr_stat;
+static int get_dns_addr_cached(void *pdns_addr, void *cached_addr,
+ socklen_t addrlen,
+ struct stat *cached_stat, u_int *cached_time)
+{
+ struct stat old_stat;
+ if (curtime - *cached_time < TIMEOUT_DEFAULT) {
+ memcpy(pdns_addr, cached_addr, addrlen);
+ return 0;
+ }
+ old_stat = *cached_stat;
+ if (stat("/etc/resolv.conf", cached_stat) != 0) {
+ return -1;
+ }
+ if (cached_stat->st_dev == old_stat.st_dev
+ && cached_stat->st_ino == old_stat.st_ino
+ && cached_stat->st_size == old_stat.st_size
+ && cached_stat->st_mtime == old_stat.st_mtime) {
+ memcpy(pdns_addr, cached_addr, addrlen);
+ return 0;
+ }
+ return 1;
+}
-int get_dns_addr(struct in_addr *pdns_addr)
+static int get_dns_addr_resolv_conf(int af, void *pdns_addr, void *cached_addr,
+ socklen_t addrlen, uint32_t *scope_id,
+ u_int *cached_time)
{
char buff[512];
char buff2[257];
FILE *f;
int found = 0;
- struct in_addr tmp_addr;
-
- if (dns_addr.s_addr != 0) {
- struct stat old_stat;
- if ((curtime - dns_addr_time) < 1000) {
- *pdns_addr = dns_addr;
- return 0;
- }
- old_stat = dns_addr_stat;
- if (stat("/etc/resolv.conf", &dns_addr_stat) != 0)
- return -1;
- if ((dns_addr_stat.st_dev == old_stat.st_dev)
- && (dns_addr_stat.st_ino == old_stat.st_ino)
- && (dns_addr_stat.st_size == old_stat.st_size)
- && (dns_addr_stat.st_mtime == old_stat.st_mtime)) {
- *pdns_addr = dns_addr;
- return 0;
- }
- }
+ void *tmp_addr = alloca(addrlen);
+ unsigned if_index;
f = fopen("/etc/resolv.conf", "r");
if (!f)
return -1;
#ifdef DEBUG
- lprint("IP address of your DNS(s): ");
+ fprintf(stderr, "IP address of your DNS(s): ");
#endif
while (fgets(buff, 512, f) != NULL) {
if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1) {
- if (!inet_aton(buff2, &tmp_addr))
+ char *c = strchr(buff2, '%');
+ if (c) {
+ if_index = if_nametoindex(c + 1);
+ *c = '\0';
+ } else {
+ if_index = 0;
+ }
+
+ if (!inet_pton(af, buff2, tmp_addr)) {
continue;
+ }
/* If it's the first one, set it to dns_addr */
if (!found) {
- *pdns_addr = tmp_addr;
- dns_addr = tmp_addr;
- dns_addr_time = curtime;
+ memcpy(pdns_addr, tmp_addr, addrlen);
+ memcpy(cached_addr, tmp_addr, addrlen);
+ if (scope_id) {
+ *scope_id = if_index;
+ }
+ *cached_time = curtime;
}
#ifdef DEBUG
else
- lprint(", ");
+ fprintf(stderr, ", ");
#endif
if (++found > 3) {
#ifdef DEBUG
- lprint("(more)");
+ fprintf(stderr, "(more)");
#endif
break;
}
#ifdef DEBUG
- else
- lprint("%s", inet_ntoa(tmp_addr));
+ else {
+ char s[INET6_ADDRSTRLEN];
+ char *res = inet_ntop(af, tmp_addr, s, sizeof(s));
+ if (!res) {
+ res = "(string conversion error)";
+ }
+ fprintf(stderr, "%s", res);
+ }
#endif
}
}
return 0;
}
+int get_dns_addr(struct in_addr *pdns_addr)
+{
+ static struct stat dns_addr_stat;
+
+ if (dns_addr.s_addr != 0) {
+ int ret;
+ ret = get_dns_addr_cached(pdns_addr, &dns_addr, sizeof(dns_addr),
+ &dns_addr_stat, &dns_addr_time);
+ if (ret <= 0) {
+ return ret;
+ }
+ }
+ return get_dns_addr_resolv_conf(AF_INET, pdns_addr, &dns_addr,
+ sizeof(dns_addr), NULL, &dns_addr_time);
+}
+
+int get_dns6_addr(struct in6_addr *pdns6_addr, uint32_t *scope_id)
+{
+ static struct stat dns6_addr_stat;
+
+ if (!in6_zero(&dns6_addr)) {
+ int ret;
+ ret = get_dns_addr_cached(pdns6_addr, &dns6_addr, sizeof(dns6_addr),
+ &dns6_addr_stat, &dns6_addr_time);
+ if (ret <= 0) {
+ return ret;
+ }
+ }
+ return get_dns_addr_resolv_conf(AF_INET6, pdns6_addr, &dns6_addr,
+ sizeof(dns6_addr),
+ scope_id, &dns6_addr_time);
+}
+
#endif
static void slirp_init_once(void)
static void slirp_state_save(QEMUFile *f, void *opaque);
static int slirp_state_load(QEMUFile *f, void *opaque, int version_id);
-Slirp *slirp_init(int restricted, struct in_addr vnetwork,
+Slirp *slirp_init(int restricted, bool in_enabled, struct in_addr vnetwork,
struct in_addr vnetmask, struct in_addr vhost,
- const char *vhostname, const char *tftp_path,
- const char *bootfile, struct in_addr vdhcp_start,
- struct in_addr vnameserver, const char **vdnssearch,
+ bool in6_enabled,
+ struct in6_addr vprefix_addr6, uint8_t vprefix_len,
+ struct in6_addr vhost6, const char *vhostname,
+ const char *tftp_path, const char *bootfile,
+ struct in_addr vdhcp_start, struct in_addr vnameserver,
+ struct in6_addr vnameserver6, const char **vdnssearch,
void *opaque)
{
Slirp *slirp = g_malloc0(sizeof(Slirp));
slirp_init_once();
+ slirp->grand = g_rand_new();
slirp->restricted = restricted;
+ slirp->in_enabled = in_enabled;
+ slirp->in6_enabled = in6_enabled;
+
if_init(slirp);
ip_init(slirp);
+ ip6_init(slirp);
/* Initialise mbufs *after* setting the MTU */
m_init(slirp);
slirp->vnetwork_addr = vnetwork;
slirp->vnetwork_mask = vnetmask;
slirp->vhost_addr = vhost;
+ slirp->vprefix_addr6 = vprefix_addr6;
+ slirp->vprefix_len = vprefix_len;
+ slirp->vhost_addr6 = vhost6;
if (vhostname) {
pstrcpy(slirp->client_hostname, sizeof(slirp->client_hostname),
vhostname);
slirp->bootp_filename = g_strdup(bootfile);
slirp->vdhcp_startaddr = vdhcp_start;
slirp->vnameserver_addr = vnameserver;
+ slirp->vnameserver_addr6 = vnameserver6;
if (vdnssearch) {
translate_dnssearch(slirp, vdnssearch);
slirp->opaque = opaque;
- register_savevm(NULL, "slirp", 0, 3,
+ register_savevm(NULL, "slirp", 0, 4,
slirp_state_save, slirp_state_load, slirp);
QTAILQ_INSERT_TAIL(&slirp_instances, slirp, entry);
unregister_savevm(NULL, "slirp", slirp);
ip_cleanup(slirp);
+ ip6_cleanup(slirp);
m_cleanup(slirp);
+ g_rand_free(slirp->grand);
+
g_free(slirp->vdnssearch);
g_free(slirp->tftp_prefix);
g_free(slirp->bootp_filename);
#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
-#define UPD_NFDS(x) if (nfds < (x)) nfds = (x)
-void slirp_update_timeout(uint32_t *timeout)
+static void slirp_update_timeout(uint32_t *timeout)
{
- if (!QTAILQ_EMPTY(&slirp_instances)) {
- *timeout = MIN(1000, *timeout);
+ Slirp *slirp;
+ uint32_t t;
+
+ if (*timeout <= TIMEOUT_FAST) {
+ return;
+ }
+
+ t = MIN(1000, *timeout);
+
+ /* If we have tcp timeout with slirp, then we will fill @timeout with
+ * more precise value.
+ */
+ QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
+ if (slirp->time_fasttimo) {
+ *timeout = TIMEOUT_FAST;
+ return;
+ }
+ if (slirp->do_slowtimo) {
+ t = MIN(TIMEOUT_SLOW, t);
+ }
}
+ *timeout = t;
}
-void slirp_select_fill(int *pnfds,
- fd_set *readfds, fd_set *writefds, fd_set *xfds)
+void slirp_pollfds_fill(GArray *pollfds, uint32_t *timeout)
{
Slirp *slirp;
struct socket *so, *so_next;
- int nfds;
if (QTAILQ_EMPTY(&slirp_instances)) {
return;
}
- /* fail safe */
- global_readfds = NULL;
- global_writefds = NULL;
- global_xfds = NULL;
-
- nfds = *pnfds;
- /*
- * First, TCP sockets
- */
- do_slowtimo = 0;
-
- QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
- /*
- * *_slowtimo needs calling if there are IP fragments
- * in the fragment queue, or there are TCP connections active
- */
- do_slowtimo |= ((slirp->tcb.so_next != &slirp->tcb) ||
- (&slirp->ipq.ip_link != slirp->ipq.ip_link.next));
-
- for (so = slirp->tcb.so_next; so != &slirp->tcb;
- so = so_next) {
- so_next = so->so_next;
-
- /*
- * See if we need a tcp_fasttimo
- */
- if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK)
- time_fasttimo = curtime; /* Flag when we want a fasttimo */
-
- /*
- * NOFDREF can include still connecting to local-host,
- * newly socreated() sockets etc. Don't want to select these.
- */
- if (so->so_state & SS_NOFDREF || so->s == -1)
- continue;
-
- /*
- * Set for reading sockets which are accepting
- */
- if (so->so_state & SS_FACCEPTCONN) {
- FD_SET(so->s, readfds);
- UPD_NFDS(so->s);
- continue;
- }
-
- /*
- * Set for writing sockets which are connecting
- */
- if (so->so_state & SS_ISFCONNECTING) {
- FD_SET(so->s, writefds);
- UPD_NFDS(so->s);
- continue;
- }
-
- /*
- * Set for writing if we are connected, can send more, and
- * we have something to send
- */
- if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) {
- FD_SET(so->s, writefds);
- UPD_NFDS(so->s);
- }
-
- /*
- * Set for reading (and urgent data) if we are connected, can
- * receive more, and we have room for it XXX /2 ?
- */
- if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) {
- FD_SET(so->s, readfds);
- FD_SET(so->s, xfds);
- UPD_NFDS(so->s);
- }
- }
-
- /*
- * UDP sockets
- */
- for (so = slirp->udb.so_next; so != &slirp->udb;
- so = so_next) {
- so_next = so->so_next;
-
- /*
- * See if it's timed out
- */
- if (so->so_expire) {
- if (so->so_expire <= curtime) {
- udp_detach(so);
- continue;
- } else
- do_slowtimo = 1; /* Let socket expire */
- }
-
- /*
- * When UDP packets are received from over the
- * link, they're sendto()'d straight away, so
- * no need for setting for writing
- * Limit the number of packets queued by this session
- * to 4. Note that even though we try and limit this
- * to 4 packets, the session could have more queued
- * if the packets needed to be fragmented
- * (XXX <= 4 ?)
- */
- if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) {
- FD_SET(so->s, readfds);
- UPD_NFDS(so->s);
- }
- }
+ /*
+ * First, TCP sockets
+ */
- /*
- * ICMP sockets
- */
- for (so = slirp->icmp.so_next; so != &slirp->icmp;
- so = so_next) {
- so_next = so->so_next;
+ QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
+ /*
+ * *_slowtimo needs calling if there are IP fragments
+ * in the fragment queue, or there are TCP connections active
+ */
+ slirp->do_slowtimo = ((slirp->tcb.so_next != &slirp->tcb) ||
+ (&slirp->ipq.ip_link != slirp->ipq.ip_link.next));
+
+ for (so = slirp->tcb.so_next; so != &slirp->tcb;
+ so = so_next) {
+ int events = 0;
+
+ so_next = so->so_next;
+
+ so->pollfds_idx = -1;
+
+ /*
+ * See if we need a tcp_fasttimo
+ */
+ if (slirp->time_fasttimo == 0 &&
+ so->so_tcpcb->t_flags & TF_DELACK) {
+ slirp->time_fasttimo = curtime; /* Flag when want a fasttimo */
+ }
- /*
- * See if it's timed out
- */
- if (so->so_expire) {
- if (so->so_expire <= curtime) {
- icmp_detach(so);
- continue;
- } else {
- do_slowtimo = 1; /* Let socket expire */
- }
- }
+ /*
+ * NOFDREF can include still connecting to local-host,
+ * newly socreated() sockets etc. Don't want to select these.
+ */
+ if (so->so_state & SS_NOFDREF || so->s == -1) {
+ continue;
+ }
- if (so->so_state & SS_ISFCONNECTED) {
- FD_SET(so->s, readfds);
- UPD_NFDS(so->s);
- }
+ /*
+ * Set for reading sockets which are accepting
+ */
+ if (so->so_state & SS_FACCEPTCONN) {
+ GPollFD pfd = {
+ .fd = so->s,
+ .events = G_IO_IN | G_IO_HUP | G_IO_ERR,
+ };
+ so->pollfds_idx = pollfds->len;
+ g_array_append_val(pollfds, pfd);
+ continue;
+ }
+
+ /*
+ * Set for writing sockets which are connecting
+ */
+ if (so->so_state & SS_ISFCONNECTING) {
+ GPollFD pfd = {
+ .fd = so->s,
+ .events = G_IO_OUT | G_IO_ERR,
+ };
+ so->pollfds_idx = pollfds->len;
+ g_array_append_val(pollfds, pfd);
+ continue;
+ }
+
+ /*
+ * Set for writing if we are connected, can send more, and
+ * we have something to send
+ */
+ if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) {
+ events |= G_IO_OUT | G_IO_ERR;
+ }
+
+ /*
+ * Set for reading (and urgent data) if we are connected, can
+ * receive more, and we have room for it XXX /2 ?
+ */
+ if (CONN_CANFRCV(so) &&
+ (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) {
+ events |= G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_PRI;
+ }
+
+ if (events) {
+ GPollFD pfd = {
+ .fd = so->s,
+ .events = events,
+ };
+ so->pollfds_idx = pollfds->len;
+ g_array_append_val(pollfds, pfd);
+ }
+ }
+
+ /*
+ * UDP sockets
+ */
+ for (so = slirp->udb.so_next; so != &slirp->udb;
+ so = so_next) {
+ so_next = so->so_next;
+
+ so->pollfds_idx = -1;
+
+ /*
+ * See if it's timed out
+ */
+ if (so->so_expire) {
+ if (so->so_expire <= curtime) {
+ udp_detach(so);
+ continue;
+ } else {
+ slirp->do_slowtimo = true; /* Let socket expire */
}
- }
+ }
- *pnfds = nfds;
+ /*
+ * When UDP packets are received from over the
+ * link, they're sendto()'d straight away, so
+ * no need for setting for writing
+ * Limit the number of packets queued by this session
+ * to 4. Note that even though we try and limit this
+ * to 4 packets, the session could have more queued
+ * if the packets needed to be fragmented
+ * (XXX <= 4 ?)
+ */
+ if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) {
+ GPollFD pfd = {
+ .fd = so->s,
+ .events = G_IO_IN | G_IO_HUP | G_IO_ERR,
+ };
+ so->pollfds_idx = pollfds->len;
+ g_array_append_val(pollfds, pfd);
+ }
+ }
+
+ /*
+ * ICMP sockets
+ */
+ for (so = slirp->icmp.so_next; so != &slirp->icmp;
+ so = so_next) {
+ so_next = so->so_next;
+
+ so->pollfds_idx = -1;
+
+ /*
+ * See if it's timed out
+ */
+ if (so->so_expire) {
+ if (so->so_expire <= curtime) {
+ icmp_detach(so);
+ continue;
+ } else {
+ slirp->do_slowtimo = true; /* Let socket expire */
+ }
+ }
+
+ if (so->so_state & SS_ISFCONNECTED) {
+ GPollFD pfd = {
+ .fd = so->s,
+ .events = G_IO_IN | G_IO_HUP | G_IO_ERR,
+ };
+ so->pollfds_idx = pollfds->len;
+ g_array_append_val(pollfds, pfd);
+ }
+ }
+ }
+ slirp_update_timeout(timeout);
}
-void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds,
- int select_error)
+void slirp_pollfds_poll(GArray *pollfds, int select_error)
{
Slirp *slirp;
struct socket *so, *so_next;
return;
}
- global_readfds = readfds;
- global_writefds = writefds;
- global_xfds = xfds;
-
- curtime = qemu_get_clock_ms(rt_clock);
+ curtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
- /*
- * See if anything has timed out
- */
- if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) {
- tcp_fasttimo(slirp);
- time_fasttimo = 0;
- }
- if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) {
- ip_slowtimo(slirp);
- tcp_slowtimo(slirp);
- last_slowtimo = curtime;
- }
-
- /*
- * Check sockets
- */
- if (!select_error) {
- /*
- * Check TCP sockets
- */
- for (so = slirp->tcb.so_next; so != &slirp->tcb;
- so = so_next) {
- so_next = so->so_next;
-
- /*
- * FD_ISSET is meaningless on these sockets
- * (and they can crash the program)
- */
- if (so->so_state & SS_NOFDREF || so->s == -1)
- continue;
-
- /*
- * Check for URG data
- * This will soread as well, so no need to
- * test for readfds below if this succeeds
- */
- if (FD_ISSET(so->s, xfds))
- sorecvoob(so);
- /*
- * Check sockets for reading
- */
- else if (FD_ISSET(so->s, readfds)) {
- /*
- * Check for incoming connections
- */
- if (so->so_state & SS_FACCEPTCONN) {
- tcp_connect(so);
- continue;
- } /* else */
- ret = soread(so);
-
- /* Output it if we read something */
- if (ret > 0)
- tcp_output(sototcpcb(so));
- }
-
- /*
- * Check sockets for writing
- */
- if (FD_ISSET(so->s, writefds)) {
- /*
- * Check for non-blocking, still-connecting sockets
- */
- if (so->so_state & SS_ISFCONNECTING) {
- /* Connected */
- so->so_state &= ~SS_ISFCONNECTING;
-
- ret = send(so->s, (const void *) &ret, 0, 0);
- if (ret < 0) {
- /* XXXXX Must fix, zero bytes is a NOP */
- if (errno == EAGAIN || errno == EWOULDBLOCK ||
- errno == EINPROGRESS || errno == ENOTCONN)
- continue;
-
- /* else failed */
- so->so_state &= SS_PERSISTENT_MASK;
- so->so_state |= SS_NOFDREF;
- }
- /* else so->so_state &= ~SS_ISFCONNECTING; */
-
- /*
- * Continue tcp_input
- */
- tcp_input((struct mbuf *)NULL, sizeof(struct ip), so);
- /* continue; */
- } else
- ret = sowrite(so);
- /*
- * XXXXX If we wrote something (a lot), there
- * could be a need for a window update.
- * In the worst case, the remote will send
- * a window probe to get things going again
- */
- }
-
- /*
- * Probe a still-connecting, non-blocking socket
- * to check if it's still alive
- */
-#ifdef PROBE_CONN
- if (so->so_state & SS_ISFCONNECTING) {
- ret = qemu_recv(so->s, &ret, 0,0);
-
- if (ret < 0) {
- /* XXX */
- if (errno == EAGAIN || errno == EWOULDBLOCK ||
- errno == EINPROGRESS || errno == ENOTCONN)
- continue; /* Still connecting, continue */
-
- /* else failed */
- so->so_state &= SS_PERSISTENT_MASK;
- so->so_state |= SS_NOFDREF;
-
- /* tcp_input will take care of it */
- } else {
- ret = send(so->s, &ret, 0,0);
- if (ret < 0) {
- /* XXX */
- if (errno == EAGAIN || errno == EWOULDBLOCK ||
- errno == EINPROGRESS || errno == ENOTCONN)
- continue;
- /* else failed */
- so->so_state &= SS_PERSISTENT_MASK;
- so->so_state |= SS_NOFDREF;
- } else
- so->so_state &= ~SS_ISFCONNECTING;
-
- }
- tcp_input((struct mbuf *)NULL, sizeof(struct ip),so);
- } /* SS_ISFCONNECTING */
-#endif
- }
-
- /*
- * Now UDP sockets.
- * Incoming packets are sent straight away, they're not buffered.
- * Incoming UDP data isn't buffered either.
- */
- for (so = slirp->udb.so_next; so != &slirp->udb;
- so = so_next) {
- so_next = so->so_next;
-
- if (so->s != -1 && FD_ISSET(so->s, readfds)) {
- sorecvfrom(so);
+ /*
+ * See if anything has timed out
+ */
+ if (slirp->time_fasttimo &&
+ ((curtime - slirp->time_fasttimo) >= TIMEOUT_FAST)) {
+ tcp_fasttimo(slirp);
+ slirp->time_fasttimo = 0;
+ }
+ if (slirp->do_slowtimo &&
+ ((curtime - slirp->last_slowtimo) >= TIMEOUT_SLOW)) {
+ ip_slowtimo(slirp);
+ tcp_slowtimo(slirp);
+ slirp->last_slowtimo = curtime;
+ }
+
+ /*
+ * Check sockets
+ */
+ if (!select_error) {
+ /*
+ * Check TCP sockets
+ */
+ for (so = slirp->tcb.so_next; so != &slirp->tcb;
+ so = so_next) {
+ int revents;
+
+ so_next = so->so_next;
+
+ revents = 0;
+ if (so->pollfds_idx != -1) {
+ revents = g_array_index(pollfds, GPollFD,
+ so->pollfds_idx).revents;
+ }
+
+ if (so->so_state & SS_NOFDREF || so->s == -1) {
+ continue;
+ }
+
+ /*
+ * Check for URG data
+ * This will soread as well, so no need to
+ * test for G_IO_IN below if this succeeds
+ */
+ if (revents & G_IO_PRI) {
+ ret = sorecvoob(so);
+ if (ret < 0) {
+ /* Socket error might have resulted in the socket being
+ * removed, do not try to do anything more with it. */
+ continue;
+ }
+ }
+ /*
+ * Check sockets for reading
+ */
+ else if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) {
+ /*
+ * Check for incoming connections
+ */
+ if (so->so_state & SS_FACCEPTCONN) {
+ tcp_connect(so);
+ continue;
+ } /* else */
+ ret = soread(so);
+
+ /* Output it if we read something */
+ if (ret > 0) {
+ tcp_output(sototcpcb(so));
+ }
+ if (ret < 0) {
+ /* Socket error might have resulted in the socket being
+ * removed, do not try to do anything more with it. */
+ continue;
+ }
+ }
+
+ /*
+ * Check sockets for writing
+ */
+ if (!(so->so_state & SS_NOFDREF) &&
+ (revents & (G_IO_OUT | G_IO_ERR))) {
+ /*
+ * Check for non-blocking, still-connecting sockets
+ */
+ if (so->so_state & SS_ISFCONNECTING) {
+ /* Connected */
+ so->so_state &= ~SS_ISFCONNECTING;
+
+ ret = send(so->s, (const void *) &ret, 0, 0);
+ if (ret < 0) {
+ /* XXXXX Must fix, zero bytes is a NOP */
+ if (errno == EAGAIN || errno == EWOULDBLOCK ||
+ errno == EINPROGRESS || errno == ENOTCONN) {
+ continue;
+ }
+
+ /* else failed */
+ so->so_state &= SS_PERSISTENT_MASK;
+ so->so_state |= SS_NOFDREF;
}
- }
+ /* else so->so_state &= ~SS_ISFCONNECTING; */
+
+ /*
+ * Continue tcp_input
+ */
+ tcp_input((struct mbuf *)NULL, sizeof(struct ip), so,
+ so->so_ffamily);
+ /* continue; */
+ } else {
+ ret = sowrite(so);
+ }
+ /*
+ * XXXXX If we wrote something (a lot), there
+ * could be a need for a window update.
+ * In the worst case, the remote will send
+ * a window probe to get things going again
+ */
+ }
/*
- * Check incoming ICMP relies.
+ * Probe a still-connecting, non-blocking socket
+ * to check if it's still alive
*/
- for (so = slirp->icmp.so_next; so != &slirp->icmp;
- so = so_next) {
- so_next = so->so_next;
+#ifdef PROBE_CONN
+ if (so->so_state & SS_ISFCONNECTING) {
+ ret = qemu_recv(so->s, &ret, 0, 0);
+
+ if (ret < 0) {
+ /* XXX */
+ if (errno == EAGAIN || errno == EWOULDBLOCK ||
+ errno == EINPROGRESS || errno == ENOTCONN) {
+ continue; /* Still connecting, continue */
+ }
+
+ /* else failed */
+ so->so_state &= SS_PERSISTENT_MASK;
+ so->so_state |= SS_NOFDREF;
+
+ /* tcp_input will take care of it */
+ } else {
+ ret = send(so->s, &ret, 0, 0);
+ if (ret < 0) {
+ /* XXX */
+ if (errno == EAGAIN || errno == EWOULDBLOCK ||
+ errno == EINPROGRESS || errno == ENOTCONN) {
+ continue;
+ }
+ /* else failed */
+ so->so_state &= SS_PERSISTENT_MASK;
+ so->so_state |= SS_NOFDREF;
+ } else {
+ so->so_state &= ~SS_ISFCONNECTING;
+ }
- if (so->s != -1 && FD_ISSET(so->s, readfds)) {
- icmp_receive(so);
}
+ tcp_input((struct mbuf *)NULL, sizeof(struct ip), so,
+ so->so_ffamily);
+ } /* SS_ISFCONNECTING */
+#endif
+ }
+
+ /*
+ * Now UDP sockets.
+ * Incoming packets are sent straight away, they're not buffered.
+ * Incoming UDP data isn't buffered either.
+ */
+ for (so = slirp->udb.so_next; so != &slirp->udb;
+ so = so_next) {
+ int revents;
+
+ so_next = so->so_next;
+
+ revents = 0;
+ if (so->pollfds_idx != -1) {
+ revents = g_array_index(pollfds, GPollFD,
+ so->pollfds_idx).revents;
+ }
+
+ if (so->s != -1 &&
+ (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))) {
+ sorecvfrom(so);
+ }
+ }
+
+ /*
+ * Check incoming ICMP relies.
+ */
+ for (so = slirp->icmp.so_next; so != &slirp->icmp;
+ so = so_next) {
+ int revents;
+
+ so_next = so->so_next;
+
+ revents = 0;
+ if (so->pollfds_idx != -1) {
+ revents = g_array_index(pollfds, GPollFD,
+ so->pollfds_idx).revents;
+ }
+
+ if (so->s != -1 &&
+ (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))) {
+ icmp_receive(so);
}
- }
+ }
+ }
if_start(slirp);
}
-
- /* clear global file descriptor sets.
- * these reside on the stack in vl.c
- * so they're unusable if we're not in
- * slirp_select_fill or slirp_select_poll.
- */
- global_readfds = NULL;
- global_writefds = NULL;
- global_xfds = NULL;
}
static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
{
- struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN);
- uint8_t arp_reply[max(ETH_HLEN + sizeof(struct arphdr), 64)];
+ struct slirp_arphdr *ah = (struct slirp_arphdr *)(pkt + ETH_HLEN);
+ uint8_t arp_reply[MAX(ETH_HLEN + sizeof(struct slirp_arphdr), 64)];
struct ethhdr *reh = (struct ethhdr *)arp_reply;
- struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN);
+ struct slirp_arphdr *rah = (struct slirp_arphdr *)(arp_reply + ETH_HLEN);
int ar_op;
struct ex_list *ex_ptr;
+ if (!slirp->in_enabled) {
+ return;
+ }
+
ar_op = ntohs(ah->ar_op);
switch(ar_op) {
case ARPOP_REQUEST:
arp_input(slirp, pkt, pkt_len);
break;
case ETH_P_IP:
+ case ETH_P_IPV6:
m = m_get(slirp);
if (!m)
return;
- /* Note: we add to align the IP header */
- if (M_FREEROOM(m) < pkt_len + 2) {
- m_inc(m, pkt_len + 2);
+ /* Note: we add 2 to align the IP header on 4 bytes,
+ * and add the margin for the tcpiphdr overhead */
+ if (M_FREEROOM(m) < pkt_len + TCPIPHDR_DELTA + 2) {
+ m_inc(m, pkt_len + TCPIPHDR_DELTA + 2);
}
- m->m_len = pkt_len + 2;
- memcpy(m->m_data + 2, pkt, pkt_len);
+ m->m_len = pkt_len + TCPIPHDR_DELTA + 2;
+ memcpy(m->m_data + TCPIPHDR_DELTA + 2, pkt, pkt_len);
- m->m_data += 2 + ETH_HLEN;
- m->m_len -= 2 + ETH_HLEN;
+ m->m_data += TCPIPHDR_DELTA + 2 + ETH_HLEN;
+ m->m_len -= TCPIPHDR_DELTA + 2 + ETH_HLEN;
- ip_input(m);
+ if (proto == ETH_P_IP) {
+ ip_input(m);
+ } else if (proto == ETH_P_IPV6) {
+ ip6_input(m);
+ }
break;
+
default:
break;
}
}
-/* Output the IP packet to the ethernet device. Returns 0 if the packet must be
- * re-queued.
+/* Prepare the IPv4 packet to be sent to the ethernet device. Returns 1 if no
+ * packet should be sent, 0 if the packet must be re-queued, 2 if the packet
+ * is ready to go.
*/
-int if_encap(Slirp *slirp, struct mbuf *ifm)
+static int if_encap4(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh,
+ uint8_t ethaddr[ETH_ALEN])
{
- uint8_t buf[1600];
- struct ethhdr *eh = (struct ethhdr *)buf;
- uint8_t ethaddr[ETH_ALEN];
const struct ip *iph = (const struct ip *)ifm->m_data;
- if (ifm->m_len + ETH_HLEN > sizeof(buf)) {
+ if (iph->ip_dst.s_addr == 0) {
+ /* 0.0.0.0 can not be a destination address, something went wrong,
+ * avoid making it worse */
return 1;
}
-
if (!arp_table_search(slirp, iph->ip_dst.s_addr, ethaddr)) {
- uint8_t arp_req[ETH_HLEN + sizeof(struct arphdr)];
+ uint8_t arp_req[ETH_HLEN + sizeof(struct slirp_arphdr)];
struct ethhdr *reh = (struct ethhdr *)arp_req;
- struct arphdr *rah = (struct arphdr *)(arp_req + ETH_HLEN);
+ struct slirp_arphdr *rah = (struct slirp_arphdr *)(arp_req + ETH_HLEN);
- if (!ifm->arp_requested) {
+ if (!ifm->resolution_requested) {
/* If the client addr is not known, send an ARP request */
memset(reh->h_dest, 0xff, ETH_ALEN);
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4);
rah->ar_tip = iph->ip_dst.s_addr;
slirp->client_ipaddr = iph->ip_dst;
slirp_output(slirp->opaque, arp_req, sizeof(arp_req));
- ifm->arp_requested = true;
+ ifm->resolution_requested = true;
/* Expire request and drop outgoing packet after 1 second */
- ifm->expiration_date = qemu_get_clock_ns(rt_clock) + 1000000000ULL;
+ ifm->expiration_date = qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + 1000000000ULL;
}
return 0;
} else {
- memcpy(eh->h_dest, ethaddr, ETH_ALEN);
memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 4);
/* XXX: not correct */
memcpy(&eh->h_source[2], &slirp->vhost_addr, 4);
eh->h_proto = htons(ETH_P_IP);
- memcpy(buf + sizeof(struct ethhdr), ifm->m_data, ifm->m_len);
- slirp_output(slirp->opaque, buf, ifm->m_len + ETH_HLEN);
+
+ /* Send this */
+ return 2;
+ }
+}
+
+/* Prepare the IPv6 packet to be sent to the ethernet device. Returns 1 if no
+ * packet should be sent, 0 if the packet must be re-queued, 2 if the packet
+ * is ready to go.
+ */
+static int if_encap6(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh,
+ uint8_t ethaddr[ETH_ALEN])
+{
+ const struct ip6 *ip6h = mtod(ifm, const struct ip6 *);
+ if (!ndp_table_search(slirp, ip6h->ip_dst, ethaddr)) {
+ if (!ifm->resolution_requested) {
+ ndp_send_ns(slirp, ip6h->ip_dst);
+ ifm->resolution_requested = true;
+ ifm->expiration_date =
+ qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + 1000000000ULL;
+ }
+ return 0;
+ } else {
+ eh->h_proto = htons(ETH_P_IPV6);
+ in6_compute_ethaddr(ip6h->ip_src, eh->h_source);
+
+ /* Send this */
+ return 2;
+ }
+}
+
+/* Output the IP packet to the ethernet device. Returns 0 if the packet must be
+ * re-queued.
+ */
+int if_encap(Slirp *slirp, struct mbuf *ifm)
+{
+ uint8_t buf[1600];
+ struct ethhdr *eh = (struct ethhdr *)buf;
+ uint8_t ethaddr[ETH_ALEN];
+ const struct ip *iph = (const struct ip *)ifm->m_data;
+ int ret;
+
+ if (ifm->m_len + ETH_HLEN > sizeof(buf)) {
return 1;
}
+
+ switch (iph->ip_v) {
+ case IPVERSION:
+ ret = if_encap4(slirp, ifm, eh, ethaddr);
+ if (ret < 2) {
+ return ret;
+ }
+ break;
+
+ case IP6VERSION:
+ ret = if_encap6(slirp, ifm, eh, ethaddr);
+ if (ret < 2) {
+ return ret;
+ }
+ break;
+
+ default:
+ g_assert_not_reached();
+ break;
+ }
+
+ memcpy(eh->h_dest, ethaddr, ETH_ALEN);
+ DEBUG_ARGS((dfd, " src = %02x:%02x:%02x:%02x:%02x:%02x\n",
+ eh->h_source[0], eh->h_source[1], eh->h_source[2],
+ eh->h_source[3], eh->h_source[4], eh->h_source[5]));
+ DEBUG_ARGS((dfd, " dst = %02x:%02x:%02x:%02x:%02x:%02x\n",
+ eh->h_dest[0], eh->h_dest[1], eh->h_dest[2],
+ eh->h_dest[3], eh->h_dest[4], eh->h_dest[5]));
+ memcpy(buf + sizeof(struct ethhdr), ifm->m_data, ifm->m_len);
+ slirp_output(slirp->opaque, buf, ifm->m_len + ETH_HLEN);
+ return 1;
}
/* Drop host forwarding rule, return 0 if found. */
ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags)
{
- if (so->s == -1 && so->extra) {
- qemu_chr_fe_write(so->extra, buf, len);
- return len;
- }
+ if (so->s == -1 && so->extra) {
+ /* XXX this blocks entire thread. Rewrite to use
+ * qemu_chr_fe_write and background I/O callbacks */
+ qemu_chr_fe_write_all(so->extra, buf, len);
+ return len;
+ }
- return send(so->s, buf, len, flags);
+ return send(so->s, buf, len, flags);
}
static struct socket *
size_t slirp_socket_can_recv(Slirp *slirp, struct in_addr guest_addr,
int guest_port)
{
- struct iovec iov[2];
- struct socket *so;
+ struct iovec iov[2];
+ struct socket *so;
- so = slirp_find_ctl_socket(slirp, guest_addr, guest_port);
+ so = slirp_find_ctl_socket(slirp, guest_addr, guest_port);
- if (!so || so->so_state & SS_NOFDREF)
- return 0;
+ if (!so || so->so_state & SS_NOFDREF) {
+ return 0;
+ }
- if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen/2))
- return 0;
+ if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen/2)) {
+ return 0;
+ }
- return sopreprbuf(so, iov, NULL);
+ return sopreprbuf(so, iov, NULL);
}
void slirp_socket_recv(Slirp *slirp, struct in_addr guest_addr, int guest_port,
static void slirp_socket_save(QEMUFile *f, struct socket *so)
{
qemu_put_be32(f, so->so_urgc);
- qemu_put_be32(f, so->so_faddr.s_addr);
- qemu_put_be32(f, so->so_laddr.s_addr);
- qemu_put_be16(f, so->so_fport);
- qemu_put_be16(f, so->so_lport);
+ qemu_put_be16(f, so->so_ffamily);
+ switch (so->so_ffamily) {
+ case AF_INET:
+ qemu_put_be32(f, so->so_faddr.s_addr);
+ qemu_put_be16(f, so->so_fport);
+ break;
+ default:
+ error_report("so_ffamily unknown, unable to save so_faddr and"
+ " so_fport");
+ }
+ qemu_put_be16(f, so->so_lfamily);
+ switch (so->so_lfamily) {
+ case AF_INET:
+ qemu_put_be32(f, so->so_laddr.s_addr);
+ qemu_put_be16(f, so->so_lport);
+ break;
+ default:
+ error_report("so_ffamily unknown, unable to save so_laddr and"
+ " so_lport");
+ }
qemu_put_byte(f, so->so_iptos);
qemu_put_byte(f, so->so_emu);
qemu_put_byte(f, so->so_type);
return 0;
}
-static int slirp_socket_load(QEMUFile *f, struct socket *so)
+static int slirp_socket_load(QEMUFile *f, struct socket *so, int version_id)
{
if (tcp_attach(so) < 0)
return -ENOMEM;
so->so_urgc = qemu_get_be32(f);
- so->so_faddr.s_addr = qemu_get_be32(f);
- so->so_laddr.s_addr = qemu_get_be32(f);
- so->so_fport = qemu_get_be16(f);
- so->so_lport = qemu_get_be16(f);
+ if (version_id <= 3) {
+ so->so_ffamily = AF_INET;
+ so->so_faddr.s_addr = qemu_get_be32(f);
+ so->so_laddr.s_addr = qemu_get_be32(f);
+ so->so_fport = qemu_get_be16(f);
+ so->so_lport = qemu_get_be16(f);
+ } else {
+ so->so_ffamily = qemu_get_be16(f);
+ switch (so->so_ffamily) {
+ case AF_INET:
+ so->so_faddr.s_addr = qemu_get_be32(f);
+ so->so_fport = qemu_get_be16(f);
+ break;
+ default:
+ error_report(
+ "so_ffamily unknown, unable to restore so_faddr and so_lport");
+ }
+ so->so_lfamily = qemu_get_be16(f);
+ switch (so->so_lfamily) {
+ case AF_INET:
+ so->so_laddr.s_addr = qemu_get_be32(f);
+ so->so_lport = qemu_get_be16(f);
+ break;
+ default:
+ error_report(
+ "so_ffamily unknown, unable to restore so_laddr and so_lport");
+ }
+ }
so->so_iptos = qemu_get_byte(f);
so->so_emu = qemu_get_byte(f);
so->so_type = qemu_get_byte(f);
if (!so)
return -ENOMEM;
- ret = slirp_socket_load(f, so);
+ ret = slirp_socket_load(f, so, version_id);
if (ret < 0)
return ret;
projects / mirror_qemu.git / blobdiff