* 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 "sysemu/char.h"
+#include "qemu/error-report.h"
+#include "chardev/char-fe.h"
+#include "migration/register.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 };
-
u_int curtime;
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 */
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) < TIMEOUT_DEFAULT) {
- *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)
#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
break;
}
#ifdef DEBUG
- else
- fprintf(stderr, "%s", inet_ntoa(tmp_addr));
+ else {
+ char s[INET6_ADDRSTRLEN];
+ const 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,
+static SaveVMHandlers savevm_slirp_state = {
+ .save_state = slirp_state_save,
+ .load_state = slirp_state_load,
+};
+
+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,
- slirp_state_save, slirp_state_load, slirp);
+ register_savevm_live(NULL, "slirp", 0, 4, &savevm_slirp_state, 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);
* test for G_IO_IN below if this succeeds
*/
if (revents & G_IO_PRI) {
- sorecvoob(so);
+ 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
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;
+ }
}
/*
/*
* Continue tcp_input
*/
- tcp_input((struct mbuf *)NULL, sizeof(struct ip), so);
+ tcp_input((struct mbuf *)NULL, sizeof(struct ip), so,
+ so->so_ffamily);
/* continue; */
} else {
ret = sowrite(so);
}
}
- tcp_input((struct mbuf *)NULL, sizeof(struct ip), so);
+ tcp_input((struct mbuf *)NULL, sizeof(struct ip), so,
+ so->so_ffamily);
} /* SS_ISFCONNECTING */
#endif
}
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 += TCPIPHDR_DELTA + 2 + ETH_HLEN;
+ m->m_len -= TCPIPHDR_DELTA + 2 + ETH_HLEN;
- m->m_data += 2 + ETH_HLEN;
- m->m_len -= 2 + ETH_HLEN;
+ if (proto == ETH_P_IP) {
+ ip_input(m);
+ } else if (proto == ETH_P_IPV6) {
+ ip6_input(m);
+ }
+ break;
- ip_input(m);
+ case ETH_P_NCSI:
+ ncsi_input(slirp, pkt, pkt_len);
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_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);
+ /* 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;
}
tcp_output(sototcpcb(so));
}
-static void slirp_tcp_save(QEMUFile *f, struct tcpcb *tp)
+static int slirp_tcp_post_load(void *opaque, int version)
{
- int i;
-
- qemu_put_sbe16(f, tp->t_state);
- for (i = 0; i < TCPT_NTIMERS; i++)
- qemu_put_sbe16(f, tp->t_timer[i]);
- qemu_put_sbe16(f, tp->t_rxtshift);
- qemu_put_sbe16(f, tp->t_rxtcur);
- qemu_put_sbe16(f, tp->t_dupacks);
- qemu_put_be16(f, tp->t_maxseg);
- qemu_put_sbyte(f, tp->t_force);
- qemu_put_be16(f, tp->t_flags);
- qemu_put_be32(f, tp->snd_una);
- qemu_put_be32(f, tp->snd_nxt);
- qemu_put_be32(f, tp->snd_up);
- qemu_put_be32(f, tp->snd_wl1);
- qemu_put_be32(f, tp->snd_wl2);
- qemu_put_be32(f, tp->iss);
- qemu_put_be32(f, tp->snd_wnd);
- qemu_put_be32(f, tp->rcv_wnd);
- qemu_put_be32(f, tp->rcv_nxt);
- qemu_put_be32(f, tp->rcv_up);
- qemu_put_be32(f, tp->irs);
- qemu_put_be32(f, tp->rcv_adv);
- qemu_put_be32(f, tp->snd_max);
- qemu_put_be32(f, tp->snd_cwnd);
- qemu_put_be32(f, tp->snd_ssthresh);
- qemu_put_sbe16(f, tp->t_idle);
- qemu_put_sbe16(f, tp->t_rtt);
- qemu_put_be32(f, tp->t_rtseq);
- qemu_put_sbe16(f, tp->t_srtt);
- qemu_put_sbe16(f, tp->t_rttvar);
- qemu_put_be16(f, tp->t_rttmin);
- qemu_put_be32(f, tp->max_sndwnd);
- qemu_put_byte(f, tp->t_oobflags);
- qemu_put_byte(f, tp->t_iobc);
- qemu_put_sbe16(f, tp->t_softerror);
- qemu_put_byte(f, tp->snd_scale);
- qemu_put_byte(f, tp->rcv_scale);
- qemu_put_byte(f, tp->request_r_scale);
- qemu_put_byte(f, tp->requested_s_scale);
- qemu_put_be32(f, tp->ts_recent);
- qemu_put_be32(f, tp->ts_recent_age);
- qemu_put_be32(f, tp->last_ack_sent);
-}
+ tcp_template((struct tcpcb *)opaque);
-static void slirp_sbuf_save(QEMUFile *f, struct sbuf *sbuf)
-{
- uint32_t off;
-
- qemu_put_be32(f, sbuf->sb_cc);
- qemu_put_be32(f, sbuf->sb_datalen);
- off = (uint32_t)(sbuf->sb_wptr - sbuf->sb_data);
- qemu_put_sbe32(f, off);
- off = (uint32_t)(sbuf->sb_rptr - sbuf->sb_data);
- qemu_put_sbe32(f, off);
- qemu_put_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen);
+ return 0;
}
-static void slirp_socket_save(QEMUFile *f, struct socket *so)
+static const VMStateDescription vmstate_slirp_tcp = {
+ .name = "slirp-tcp",
+ .version_id = 0,
+ .post_load = slirp_tcp_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_INT16(t_state, struct tcpcb),
+ VMSTATE_INT16_ARRAY(t_timer, struct tcpcb, TCPT_NTIMERS),
+ VMSTATE_INT16(t_rxtshift, struct tcpcb),
+ VMSTATE_INT16(t_rxtcur, struct tcpcb),
+ VMSTATE_INT16(t_dupacks, struct tcpcb),
+ VMSTATE_UINT16(t_maxseg, struct tcpcb),
+ VMSTATE_UINT8(t_force, struct tcpcb),
+ VMSTATE_UINT16(t_flags, struct tcpcb),
+ VMSTATE_UINT32(snd_una, struct tcpcb),
+ VMSTATE_UINT32(snd_nxt, struct tcpcb),
+ VMSTATE_UINT32(snd_up, struct tcpcb),
+ VMSTATE_UINT32(snd_wl1, struct tcpcb),
+ VMSTATE_UINT32(snd_wl2, struct tcpcb),
+ VMSTATE_UINT32(iss, struct tcpcb),
+ VMSTATE_UINT32(snd_wnd, struct tcpcb),
+ VMSTATE_UINT32(rcv_wnd, struct tcpcb),
+ VMSTATE_UINT32(rcv_nxt, struct tcpcb),
+ VMSTATE_UINT32(rcv_up, struct tcpcb),
+ VMSTATE_UINT32(irs, struct tcpcb),
+ VMSTATE_UINT32(rcv_adv, struct tcpcb),
+ VMSTATE_UINT32(snd_max, struct tcpcb),
+ VMSTATE_UINT32(snd_cwnd, struct tcpcb),
+ VMSTATE_UINT32(snd_ssthresh, struct tcpcb),
+ VMSTATE_INT16(t_idle, struct tcpcb),
+ VMSTATE_INT16(t_rtt, struct tcpcb),
+ VMSTATE_UINT32(t_rtseq, struct tcpcb),
+ VMSTATE_INT16(t_srtt, struct tcpcb),
+ VMSTATE_INT16(t_rttvar, struct tcpcb),
+ VMSTATE_UINT16(t_rttmin, struct tcpcb),
+ VMSTATE_UINT32(max_sndwnd, struct tcpcb),
+ VMSTATE_UINT8(t_oobflags, struct tcpcb),
+ VMSTATE_UINT8(t_iobc, struct tcpcb),
+ VMSTATE_INT16(t_softerror, struct tcpcb),
+ VMSTATE_UINT8(snd_scale, struct tcpcb),
+ VMSTATE_UINT8(rcv_scale, struct tcpcb),
+ VMSTATE_UINT8(request_r_scale, struct tcpcb),
+ VMSTATE_UINT8(requested_s_scale, struct tcpcb),
+ VMSTATE_UINT32(ts_recent, struct tcpcb),
+ VMSTATE_UINT32(ts_recent_age, struct tcpcb),
+ VMSTATE_UINT32(last_ack_sent, struct tcpcb),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+/* The sbuf has a pair of pointers that are migrated as offsets;
+ * we calculate the offsets and restore the pointers using
+ * pre_save/post_load on a tmp structure.
+ */
+struct sbuf_tmp {
+ struct sbuf *parent;
+ uint32_t roff, woff;
+};
+
+static int sbuf_tmp_pre_save(void *opaque)
{
- 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_byte(f, so->so_iptos);
- qemu_put_byte(f, so->so_emu);
- qemu_put_byte(f, so->so_type);
- qemu_put_be32(f, so->so_state);
- slirp_sbuf_save(f, &so->so_rcv);
- slirp_sbuf_save(f, &so->so_snd);
- slirp_tcp_save(f, so->so_tcpcb);
+ struct sbuf_tmp *tmp = opaque;
+ tmp->woff = tmp->parent->sb_wptr - tmp->parent->sb_data;
+ tmp->roff = tmp->parent->sb_rptr - tmp->parent->sb_data;
+
+ return 0;
}
-static void slirp_bootp_save(QEMUFile *f, Slirp *slirp)
+static int sbuf_tmp_post_load(void *opaque, int version)
{
- int i;
+ struct sbuf_tmp *tmp = opaque;
+ uint32_t requested_len = tmp->parent->sb_datalen;
+
+ /* Allocate the buffer space used by the field after the tmp */
+ sbreserve(tmp->parent, tmp->parent->sb_datalen);
- for (i = 0; i < NB_BOOTP_CLIENTS; i++) {
- qemu_put_be16(f, slirp->bootp_clients[i].allocated);
- qemu_put_buffer(f, slirp->bootp_clients[i].macaddr, 6);
+ if (tmp->parent->sb_datalen != requested_len) {
+ return -ENOMEM;
+ }
+ if (tmp->woff >= requested_len ||
+ tmp->roff >= requested_len) {
+ error_report("invalid sbuf offsets r/w=%u/%u len=%u",
+ tmp->roff, tmp->woff, requested_len);
+ return -EINVAL;
}
-}
-static void slirp_state_save(QEMUFile *f, void *opaque)
-{
- Slirp *slirp = opaque;
- struct ex_list *ex_ptr;
+ tmp->parent->sb_wptr = tmp->parent->sb_data + tmp->woff;
+ tmp->parent->sb_rptr = tmp->parent->sb_data + tmp->roff;
- for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
- if (ex_ptr->ex_pty == 3) {
- struct socket *so;
- so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr,
- ntohs(ex_ptr->ex_fport));
- if (!so)
- continue;
+ return 0;
+}
- qemu_put_byte(f, 42);
- slirp_socket_save(f, so);
- }
- qemu_put_byte(f, 0);
- qemu_put_be16(f, slirp->ip_id);
+static const VMStateDescription vmstate_slirp_sbuf_tmp = {
+ .name = "slirp-sbuf-tmp",
+ .post_load = sbuf_tmp_post_load,
+ .pre_save = sbuf_tmp_pre_save,
+ .version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(woff, struct sbuf_tmp),
+ VMSTATE_UINT32(roff, struct sbuf_tmp),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_slirp_sbuf = {
+ .name = "slirp-sbuf",
+ .version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(sb_cc, struct sbuf),
+ VMSTATE_UINT32(sb_datalen, struct sbuf),
+ VMSTATE_WITH_TMP(struct sbuf, struct sbuf_tmp, vmstate_slirp_sbuf_tmp),
+ VMSTATE_VBUFFER_UINT32(sb_data, struct sbuf, 0, NULL, sb_datalen),
+ VMSTATE_END_OF_LIST()
+ }
+};
- slirp_bootp_save(f, slirp);
+static bool slirp_older_than_v4(void *opaque, int version_id)
+{
+ return version_id < 4;
}
-static void slirp_tcp_load(QEMUFile *f, struct tcpcb *tp)
+static bool slirp_family_inet(void *opaque, int version_id)
{
- int i;
-
- tp->t_state = qemu_get_sbe16(f);
- for (i = 0; i < TCPT_NTIMERS; i++)
- tp->t_timer[i] = qemu_get_sbe16(f);
- tp->t_rxtshift = qemu_get_sbe16(f);
- tp->t_rxtcur = qemu_get_sbe16(f);
- tp->t_dupacks = qemu_get_sbe16(f);
- tp->t_maxseg = qemu_get_be16(f);
- tp->t_force = qemu_get_sbyte(f);
- tp->t_flags = qemu_get_be16(f);
- tp->snd_una = qemu_get_be32(f);
- tp->snd_nxt = qemu_get_be32(f);
- tp->snd_up = qemu_get_be32(f);
- tp->snd_wl1 = qemu_get_be32(f);
- tp->snd_wl2 = qemu_get_be32(f);
- tp->iss = qemu_get_be32(f);
- tp->snd_wnd = qemu_get_be32(f);
- tp->rcv_wnd = qemu_get_be32(f);
- tp->rcv_nxt = qemu_get_be32(f);
- tp->rcv_up = qemu_get_be32(f);
- tp->irs = qemu_get_be32(f);
- tp->rcv_adv = qemu_get_be32(f);
- tp->snd_max = qemu_get_be32(f);
- tp->snd_cwnd = qemu_get_be32(f);
- tp->snd_ssthresh = qemu_get_be32(f);
- tp->t_idle = qemu_get_sbe16(f);
- tp->t_rtt = qemu_get_sbe16(f);
- tp->t_rtseq = qemu_get_be32(f);
- tp->t_srtt = qemu_get_sbe16(f);
- tp->t_rttvar = qemu_get_sbe16(f);
- tp->t_rttmin = qemu_get_be16(f);
- tp->max_sndwnd = qemu_get_be32(f);
- tp->t_oobflags = qemu_get_byte(f);
- tp->t_iobc = qemu_get_byte(f);
- tp->t_softerror = qemu_get_sbe16(f);
- tp->snd_scale = qemu_get_byte(f);
- tp->rcv_scale = qemu_get_byte(f);
- tp->request_r_scale = qemu_get_byte(f);
- tp->requested_s_scale = qemu_get_byte(f);
- tp->ts_recent = qemu_get_be32(f);
- tp->ts_recent_age = qemu_get_be32(f);
- tp->last_ack_sent = qemu_get_be32(f);
- tcp_template(tp);
+ union slirp_sockaddr *ssa = (union slirp_sockaddr *)opaque;
+ return ssa->ss.ss_family == AF_INET;
}
-static int slirp_sbuf_load(QEMUFile *f, struct sbuf *sbuf)
+static int slirp_socket_pre_load(void *opaque)
{
- uint32_t off, sb_cc, sb_datalen;
+ struct socket *so = opaque;
+ if (tcp_attach(so) < 0) {
+ return -ENOMEM;
+ }
+ /* Older versions don't load these fields */
+ so->so_ffamily = AF_INET;
+ so->so_lfamily = AF_INET;
+ return 0;
+}
+
+#ifndef _WIN32
+#define VMSTATE_SIN4_ADDR(f, s, t) VMSTATE_UINT32_TEST(f, s, t)
+#else
+/* Win uses u_long rather than uint32_t - but it's still 32bits long */
+#define VMSTATE_SIN4_ADDR(f, s, t) VMSTATE_SINGLE_TEST(f, s, t, 0, \
+ vmstate_info_uint32, u_long)
+#endif
- sb_cc = qemu_get_be32(f);
- sb_datalen = qemu_get_be32(f);
+/* The OS provided ss_family field isn't that portable; it's size
+ * and type varies (16/8 bit, signed, unsigned)
+ * and the values it contains aren't fully portable.
+ */
+typedef struct SS_FamilyTmpStruct {
+ union slirp_sockaddr *parent;
+ uint16_t portable_family;
+} SS_FamilyTmpStruct;
- sbreserve(sbuf, sb_datalen);
+#define SS_FAMILY_MIG_IPV4 2 /* Linux, BSD, Win... */
+#define SS_FAMILY_MIG_IPV6 10 /* Linux */
+#define SS_FAMILY_MIG_OTHER 0xffff
- if (sbuf->sb_datalen != sb_datalen)
- return -ENOMEM;
+static int ss_family_pre_save(void *opaque)
+{
+ SS_FamilyTmpStruct *tss = opaque;
- sbuf->sb_cc = sb_cc;
+ tss->portable_family = SS_FAMILY_MIG_OTHER;
- off = qemu_get_sbe32(f);
- sbuf->sb_wptr = sbuf->sb_data + off;
- off = qemu_get_sbe32(f);
- sbuf->sb_rptr = sbuf->sb_data + off;
- qemu_get_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen);
+ if (tss->parent->ss.ss_family == AF_INET) {
+ tss->portable_family = SS_FAMILY_MIG_IPV4;
+ } else if (tss->parent->ss.ss_family == AF_INET6) {
+ tss->portable_family = SS_FAMILY_MIG_IPV6;
+ }
return 0;
}
-static int slirp_socket_load(QEMUFile *f, struct socket *so)
+static int ss_family_post_load(void *opaque, int version_id)
{
- if (tcp_attach(so) < 0)
- return -ENOMEM;
+ SS_FamilyTmpStruct *tss = opaque;
- 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);
- so->so_iptos = qemu_get_byte(f);
- so->so_emu = qemu_get_byte(f);
- so->so_type = qemu_get_byte(f);
- so->so_state = qemu_get_be32(f);
- if (slirp_sbuf_load(f, &so->so_rcv) < 0)
- return -ENOMEM;
- if (slirp_sbuf_load(f, &so->so_snd) < 0)
- return -ENOMEM;
- slirp_tcp_load(f, so->so_tcpcb);
+ switch (tss->portable_family) {
+ case SS_FAMILY_MIG_IPV4:
+ tss->parent->ss.ss_family = AF_INET;
+ break;
+ case SS_FAMILY_MIG_IPV6:
+ case 23: /* compatibility: AF_INET6 from mingw */
+ case 28: /* compatibility: AF_INET6 from FreeBSD sys/socket.h */
+ tss->parent->ss.ss_family = AF_INET6;
+ break;
+ default:
+ error_report("invalid ss_family type %x", tss->portable_family);
+ return -EINVAL;
+ }
return 0;
}
-static void slirp_bootp_load(QEMUFile *f, Slirp *slirp)
-{
- int i;
+static const VMStateDescription vmstate_slirp_ss_family = {
+ .name = "slirp-socket-addr/ss_family",
+ .pre_save = ss_family_pre_save,
+ .post_load = ss_family_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT16(portable_family, SS_FamilyTmpStruct),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_slirp_socket_addr = {
+ .name = "slirp-socket-addr",
+ .version_id = 4,
+ .fields = (VMStateField[]) {
+ VMSTATE_WITH_TMP(union slirp_sockaddr, SS_FamilyTmpStruct,
+ vmstate_slirp_ss_family),
+ VMSTATE_SIN4_ADDR(sin.sin_addr.s_addr, union slirp_sockaddr,
+ slirp_family_inet),
+ VMSTATE_UINT16_TEST(sin.sin_port, union slirp_sockaddr,
+ slirp_family_inet),
+
+#if 0
+ /* Untested: Needs checking by someone with IPv6 test */
+ VMSTATE_BUFFER_TEST(sin6.sin6_addr, union slirp_sockaddr,
+ slirp_family_inet6),
+ VMSTATE_UINT16_TEST(sin6.sin6_port, union slirp_sockaddr,
+ slirp_family_inet6),
+ VMSTATE_UINT32_TEST(sin6.sin6_flowinfo, union slirp_sockaddr,
+ slirp_family_inet6),
+ VMSTATE_UINT32_TEST(sin6.sin6_scope_id, union slirp_sockaddr,
+ slirp_family_inet6),
+#endif
+
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_slirp_socket = {
+ .name = "slirp-socket",
+ .version_id = 4,
+ .pre_load = slirp_socket_pre_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(so_urgc, struct socket),
+ /* Pre-v4 versions */
+ VMSTATE_SIN4_ADDR(so_faddr.s_addr, struct socket,
+ slirp_older_than_v4),
+ VMSTATE_SIN4_ADDR(so_laddr.s_addr, struct socket,
+ slirp_older_than_v4),
+ VMSTATE_UINT16_TEST(so_fport, struct socket, slirp_older_than_v4),
+ VMSTATE_UINT16_TEST(so_lport, struct socket, slirp_older_than_v4),
+ /* v4 and newer */
+ VMSTATE_STRUCT(fhost, struct socket, 4, vmstate_slirp_socket_addr,
+ union slirp_sockaddr),
+ VMSTATE_STRUCT(lhost, struct socket, 4, vmstate_slirp_socket_addr,
+ union slirp_sockaddr),
+
+ VMSTATE_UINT8(so_iptos, struct socket),
+ VMSTATE_UINT8(so_emu, struct socket),
+ VMSTATE_UINT8(so_type, struct socket),
+ VMSTATE_INT32(so_state, struct socket),
+ VMSTATE_STRUCT(so_rcv, struct socket, 0, vmstate_slirp_sbuf,
+ struct sbuf),
+ VMSTATE_STRUCT(so_snd, struct socket, 0, vmstate_slirp_sbuf,
+ struct sbuf),
+ VMSTATE_STRUCT_POINTER(so_tcpcb, struct socket, vmstate_slirp_tcp,
+ struct tcpcb),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_slirp_bootp_client = {
+ .name = "slirp_bootpclient",
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT16(allocated, BOOTPClient),
+ VMSTATE_BUFFER(macaddr, BOOTPClient),
+ VMSTATE_END_OF_LIST()
+ }
+};
- for (i = 0; i < NB_BOOTP_CLIENTS; i++) {
- slirp->bootp_clients[i].allocated = qemu_get_be16(f);
- qemu_get_buffer(f, slirp->bootp_clients[i].macaddr, 6);
+static const VMStateDescription vmstate_slirp = {
+ .name = "slirp",
+ .version_id = 4,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT16_V(ip_id, Slirp, 2),
+ VMSTATE_STRUCT_ARRAY(bootp_clients, Slirp, NB_BOOTP_CLIENTS, 3,
+ vmstate_slirp_bootp_client, BOOTPClient),
+ VMSTATE_END_OF_LIST()
}
+};
+
+static void slirp_state_save(QEMUFile *f, void *opaque)
+{
+ Slirp *slirp = opaque;
+ struct ex_list *ex_ptr;
+
+ for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
+ if (ex_ptr->ex_pty == 3) {
+ struct socket *so;
+ so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr,
+ ntohs(ex_ptr->ex_fport));
+ if (!so)
+ continue;
+
+ qemu_put_byte(f, 42);
+ vmstate_save_state(f, &vmstate_slirp_socket, so, NULL);
+ }
+ qemu_put_byte(f, 0);
+
+ vmstate_save_state(f, &vmstate_slirp, slirp, NULL);
}
+
static int slirp_state_load(QEMUFile *f, void *opaque, int version_id)
{
Slirp *slirp = opaque;
if (!so)
return -ENOMEM;
- ret = slirp_socket_load(f, so);
+ ret = vmstate_load_state(f, &vmstate_slirp_socket, so, version_id);
if (ret < 0)
return ret;
so->extra = (void *)ex_ptr->ex_exec;
}
- if (version_id >= 2) {
- slirp->ip_id = qemu_get_be16(f);
- }
-
- if (version_id >= 3) {
- slirp_bootp_load(f, slirp);
- }
-
- return 0;
+ return vmstate_load_state(f, &vmstate_slirp, slirp, version_id);
}
projects / qemu.git / blobdiff