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linux-user: add rtnetlink(7) support 

rtnetlink is needed to use iproute package (ip addr, ip route)
and dhcp client.

Examples:

Without this patch:
    # ip link
    Cannot open netlink socket: Address family not supported by protocol
    # ip addr
    Cannot open netlink socket: Address family not supported by protocol
    # ip route
    Cannot open netlink socket: Address family not supported by protocol
    # dhclient eth0
    Cannot open netlink socket: Address family not supported by protocol
    Cannot open netlink socket: Address family not supported by protocol

With this patch:
    # ip link
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    51: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT qlen 1000
        link/ether 00:16:3e:89:6b:d7 brd ff:ff:ff:ff:ff:ff
    # ip addr show eth0
    51: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP qlen 1000
        link/ether 00:16:3e:89:6b:d7 brd ff:ff:ff:ff:ff:ff
        inet 192.168.122.197/24 brd 192.168.122.255 scope global eth0
           valid_lft forever preferred_lft forever
        inet6 fe80::216:3eff:fe89:6bd7/64 scope link
           valid_lft forever preferred_lft forever
    # ip route
    default via 192.168.122.1 dev eth0
    192.168.122.0/24 dev eth0  proto kernel  scope link  src 192.168.122.197
    # ip addr flush eth0
    # ip addr add 192.168.122.10 dev eth0
    # ip addr show eth0
    51: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP qlen 1000
        link/ether 00:16:3e:89:6b:d7 brd ff:ff:ff:ff:ff:ff
        inet 192.168.122.10/32 scope global eth0
           valid_lft forever preferred_lft forever
    # ip route add 192.168.122.0/24 via 192.168.122.10
    # ip route
        192.168.122.0/24 via 192.168.122.10 dev eth0

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Laurent Vivier 2016-05-22 18:56:19 +02:00 committed by Riku Voipio
parent 3bef0451e6
commit 6c5b5645ae
1 changed files with 575 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

581
linux-user/syscall.c
View File

@ -101,6 +101,8 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#include <linux/route.h>
#include <linux/filter.h>
#include <linux/blkpg.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include "linux_loop.h"
#include "uname.h"
@ -304,6 +306,14 @@ static TargetFdTrans **target_fd_trans;
static unsigned int target_fd_max;
static TargetFdDataFunc fd_trans_target_to_host_data(int fd)
{
if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
return target_fd_trans[fd]->target_to_host_data;
}
return NULL;
}
static TargetFdDataFunc fd_trans_host_to_target_data(int fd)
{
if (fd >= 0 && fd < target_fd_max && target_fd_trans[fd]) {
@ -1261,7 +1271,13 @@ static inline abi_long target_to_host_sockaddr(int fd, struct sockaddr *addr,
memcpy(addr, target_saddr, len);
addr->sa_family = sa_family;
if (sa_family == AF_PACKET) {
if (sa_family == AF_NETLINK) {
struct sockaddr_nl *nladdr;
nladdr = (struct sockaddr_nl *)addr;
nladdr->nl_pid = tswap32(nladdr->nl_pid);
nladdr->nl_groups = tswap32(nladdr->nl_groups);
} else if (sa_family == AF_PACKET) {
struct target_sockaddr_ll *lladdr;
lladdr = (struct target_sockaddr_ll *)addr;
@ -1284,6 +1300,11 @@ static inline abi_long host_to_target_sockaddr(abi_ulong target_addr,
return -TARGET_EFAULT;
memcpy(target_saddr, addr, len);
target_saddr->sa_family = tswap16(addr->sa_family);
if (addr->sa_family == AF_NETLINK) {
struct sockaddr_nl *target_nl = (struct sockaddr_nl *)target_saddr;
target_nl->nl_pid = tswap32(target_nl->nl_pid);
target_nl->nl_groups = tswap32(target_nl->nl_groups);
}
unlock_user(target_saddr, target_addr, len);
return 0;
@ -1515,6 +1536,511 @@ static inline abi_long host_to_target_cmsg(struct target_msghdr *target_msgh,
return 0;
}
static void tswap_nlmsghdr(struct nlmsghdr *nlh)
{
nlh->nlmsg_len = tswap32(nlh->nlmsg_len);
nlh->nlmsg_type = tswap16(nlh->nlmsg_type);
nlh->nlmsg_flags = tswap16(nlh->nlmsg_flags);
nlh->nlmsg_seq = tswap32(nlh->nlmsg_seq);
nlh->nlmsg_pid = tswap32(nlh->nlmsg_pid);
}
static abi_long host_to_target_for_each_nlmsg(struct nlmsghdr *nlh,
size_t len,
abi_long (*host_to_target_nlmsg)
(struct nlmsghdr *))
{
uint32_t nlmsg_len;
abi_long ret;
while (len > sizeof(struct nlmsghdr)) {
nlmsg_len = nlh->nlmsg_len;
if (nlmsg_len < sizeof(struct nlmsghdr) ||
nlmsg_len > len) {
break;
}
switch (nlh->nlmsg_type) {
case NLMSG_DONE:
tswap_nlmsghdr(nlh);
return 0;
case NLMSG_NOOP:
break;
case NLMSG_ERROR:
{
struct nlmsgerr *e = NLMSG_DATA(nlh);
e->error = tswap32(e->error);
tswap_nlmsghdr(&e->msg);
tswap_nlmsghdr(nlh);
return 0;
}
default:
ret = host_to_target_nlmsg(nlh);
if (ret < 0) {
tswap_nlmsghdr(nlh);
return ret;
}
break;
}
tswap_nlmsghdr(nlh);
len -= NLMSG_ALIGN(nlmsg_len);
nlh = (struct nlmsghdr *)(((char*)nlh) + NLMSG_ALIGN(nlmsg_len));
}
return 0;
}
static abi_long target_to_host_for_each_nlmsg(struct nlmsghdr *nlh,
size_t len,
abi_long (*target_to_host_nlmsg)
(struct nlmsghdr *))
{
int ret;
while (len > sizeof(struct nlmsghdr)) {
if (tswap32(nlh->nlmsg_len) < sizeof(struct nlmsghdr) ||
tswap32(nlh->nlmsg_len) > len) {
break;
}
tswap_nlmsghdr(nlh);
switch (nlh->nlmsg_type) {
case NLMSG_DONE:
return 0;
case NLMSG_NOOP:
break;
case NLMSG_ERROR:
{
struct nlmsgerr *e = NLMSG_DATA(nlh);
e->error = tswap32(e->error);
tswap_nlmsghdr(&e->msg);
}
default:
ret = target_to_host_nlmsg(nlh);
if (ret < 0) {
return ret;
}
}
len -= NLMSG_ALIGN(nlh->nlmsg_len);
nlh = (struct nlmsghdr *)(((char *)nlh) + NLMSG_ALIGN(nlh->nlmsg_len));
}
return 0;
}
static abi_long host_to_target_for_each_rtattr(struct rtattr *rtattr,
size_t len,
abi_long (*host_to_target_rtattr)
(struct rtattr *))
{
unsigned short rta_len;
abi_long ret;
while (len > sizeof(struct rtattr)) {
rta_len = rtattr->rta_len;
if (rta_len < sizeof(struct rtattr) ||
rta_len > len) {
break;
}
ret = host_to_target_rtattr(rtattr);
rtattr->rta_len = tswap16(rtattr->rta_len);
rtattr->rta_type = tswap16(rtattr->rta_type);
if (ret < 0) {
return ret;
}
len -= RTA_ALIGN(rta_len);
rtattr = (struct rtattr *)(((char *)rtattr) + RTA_ALIGN(rta_len));
}
return 0;
}
static abi_long host_to_target_data_link_rtattr(struct rtattr *rtattr)
{
uint32_t *u32;
struct rtnl_link_stats *st;
struct rtnl_link_stats64 *st64;
struct rtnl_link_ifmap *map;
switch (rtattr->rta_type) {
/* binary stream */
case IFLA_ADDRESS:
case IFLA_BROADCAST:
/* string */
case IFLA_IFNAME:
case IFLA_QDISC:
break;
/* uin8_t */
case IFLA_OPERSTATE:
case IFLA_LINKMODE:
case IFLA_CARRIER:
case IFLA_PROTO_DOWN:
break;
/* uint32_t */
case IFLA_MTU:
case IFLA_LINK:
case IFLA_WEIGHT:
case IFLA_TXQLEN:
case IFLA_CARRIER_CHANGES:
case IFLA_NUM_RX_QUEUES:
case IFLA_NUM_TX_QUEUES:
case IFLA_PROMISCUITY:
case IFLA_EXT_MASK:
case IFLA_LINK_NETNSID:
case IFLA_GROUP:
case IFLA_MASTER:
case IFLA_NUM_VF:
u32 = RTA_DATA(rtattr);
*u32 = tswap32(*u32);
break;
/* struct rtnl_link_stats */
case IFLA_STATS:
st = RTA_DATA(rtattr);
st->rx_packets = tswap32(st->rx_packets);
st->tx_packets = tswap32(st->tx_packets);
st->rx_bytes = tswap32(st->rx_bytes);
st->tx_bytes = tswap32(st->tx_bytes);
st->rx_errors = tswap32(st->rx_errors);
st->tx_errors = tswap32(st->tx_errors);
st->rx_dropped = tswap32(st->rx_dropped);
st->tx_dropped = tswap32(st->tx_dropped);
st->multicast = tswap32(st->multicast);
st->collisions = tswap32(st->collisions);
/* detailed rx_errors: */
st->rx_length_errors = tswap32(st->rx_length_errors);
st->rx_over_errors = tswap32(st->rx_over_errors);
st->rx_crc_errors = tswap32(st->rx_crc_errors);
st->rx_frame_errors = tswap32(st->rx_frame_errors);
st->rx_fifo_errors = tswap32(st->rx_fifo_errors);
st->rx_missed_errors = tswap32(st->rx_missed_errors);
/* detailed tx_errors */
st->tx_aborted_errors = tswap32(st->tx_aborted_errors);
st->tx_carrier_errors = tswap32(st->tx_carrier_errors);
st->tx_fifo_errors = tswap32(st->tx_fifo_errors);
st->tx_heartbeat_errors = tswap32(st->tx_heartbeat_errors);
st->tx_window_errors = tswap32(st->tx_window_errors);
/* for cslip etc */
st->rx_compressed = tswap32(st->rx_compressed);
st->tx_compressed = tswap32(st->tx_compressed);
break;
/* struct rtnl_link_stats64 */
case IFLA_STATS64:
st64 = RTA_DATA(rtattr);
st64->rx_packets = tswap64(st64->rx_packets);
st64->tx_packets = tswap64(st64->tx_packets);
st64->rx_bytes = tswap64(st64->rx_bytes);
st64->tx_bytes = tswap64(st64->tx_bytes);
st64->rx_errors = tswap64(st64->rx_errors);
st64->tx_errors = tswap64(st64->tx_errors);
st64->rx_dropped = tswap64(st64->rx_dropped);
st64->tx_dropped = tswap64(st64->tx_dropped);
st64->multicast = tswap64(st64->multicast);
st64->collisions = tswap64(st64->collisions);
/* detailed rx_errors: */
st64->rx_length_errors = tswap64(st64->rx_length_errors);
st64->rx_over_errors = tswap64(st64->rx_over_errors);
st64->rx_crc_errors = tswap64(st64->rx_crc_errors);
st64->rx_frame_errors = tswap64(st64->rx_frame_errors);
st64->rx_fifo_errors = tswap64(st64->rx_fifo_errors);
st64->rx_missed_errors = tswap64(st64->rx_missed_errors);
/* detailed tx_errors */
st64->tx_aborted_errors = tswap64(st64->tx_aborted_errors);
st64->tx_carrier_errors = tswap64(st64->tx_carrier_errors);
st64->tx_fifo_errors = tswap64(st64->tx_fifo_errors);
st64->tx_heartbeat_errors = tswap64(st64->tx_heartbeat_errors);
st64->tx_window_errors = tswap64(st64->tx_window_errors);
/* for cslip etc */
st64->rx_compressed = tswap64(st64->rx_compressed);
st64->tx_compressed = tswap64(st64->tx_compressed);
break;
/* struct rtnl_link_ifmap */
case IFLA_MAP:
map = RTA_DATA(rtattr);
map->mem_start = tswap64(map->mem_start);
map->mem_end = tswap64(map->mem_end);
map->base_addr = tswap64(map->base_addr);
map->irq = tswap16(map->irq);
break;
/* nested */
case IFLA_AF_SPEC:
case IFLA_LINKINFO:
/* FIXME: implement nested type */
gemu_log("Unimplemented nested type %d\n", rtattr->rta_type);
break;
default:
gemu_log("Unknown host IFLA type: %d\n", rtattr->rta_type);
break;
}
return 0;
}
static abi_long host_to_target_data_addr_rtattr(struct rtattr *rtattr)
{
uint32_t *u32;
struct ifa_cacheinfo *ci;
switch (rtattr->rta_type) {
/* binary: depends on family type */
case IFA_ADDRESS:
case IFA_LOCAL:
break;
/* string */
case IFA_LABEL:
break;
/* u32 */
case IFA_FLAGS:
case IFA_BROADCAST:
u32 = RTA_DATA(rtattr);
*u32 = tswap32(*u32);
break;
/* struct ifa_cacheinfo */
case IFA_CACHEINFO:
ci = RTA_DATA(rtattr);
ci->ifa_prefered = tswap32(ci->ifa_prefered);
ci->ifa_valid = tswap32(ci->ifa_valid);
ci->cstamp = tswap32(ci->cstamp);
ci->tstamp = tswap32(ci->tstamp);
break;
default:
gemu_log("Unknown host IFA type: %d\n", rtattr->rta_type);
break;
}
return 0;
}
static abi_long host_to_target_data_route_rtattr(struct rtattr *rtattr)
{
uint32_t *u32;
switch (rtattr->rta_type) {
/* binary: depends on family type */
case RTA_GATEWAY:
case RTA_DST:
case RTA_PREFSRC:
break;
/* u32 */
case RTA_PRIORITY:
case RTA_TABLE:
case RTA_OIF:
u32 = RTA_DATA(rtattr);
*u32 = tswap32(*u32);
break;
default:
gemu_log("Unknown host RTA type: %d\n", rtattr->rta_type);
break;
}
return 0;
}
static abi_long host_to_target_link_rtattr(struct rtattr *rtattr,
uint32_t rtattr_len)
{
return host_to_target_for_each_rtattr(rtattr, rtattr_len,
host_to_target_data_link_rtattr);
}
static abi_long host_to_target_addr_rtattr(struct rtattr *rtattr,
uint32_t rtattr_len)
{
return host_to_target_for_each_rtattr(rtattr, rtattr_len,
host_to_target_data_addr_rtattr);
}
static abi_long host_to_target_route_rtattr(struct rtattr *rtattr,
uint32_t rtattr_len)
{
return host_to_target_for_each_rtattr(rtattr, rtattr_len,
host_to_target_data_route_rtattr);
}
static abi_long host_to_target_data_route(struct nlmsghdr *nlh)
{
uint32_t nlmsg_len;
struct ifinfomsg *ifi;
struct ifaddrmsg *ifa;
struct rtmsg *rtm;
nlmsg_len = nlh->nlmsg_len;
switch (nlh->nlmsg_type) {
case RTM_NEWLINK:
case RTM_DELLINK:
case RTM_GETLINK:
ifi = NLMSG_DATA(nlh);
ifi->ifi_type = tswap16(ifi->ifi_type);
ifi->ifi_index = tswap32(ifi->ifi_index);
ifi->ifi_flags = tswap32(ifi->ifi_flags);
ifi->ifi_change = tswap32(ifi->ifi_change);
host_to_target_link_rtattr(IFLA_RTA(ifi),
nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)));
break;
case RTM_NEWADDR:
case RTM_DELADDR:
case RTM_GETADDR:
ifa = NLMSG_DATA(nlh);
ifa->ifa_index = tswap32(ifa->ifa_index);
host_to_target_addr_rtattr(IFA_RTA(ifa),
nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
break;
case RTM_NEWROUTE:
case RTM_DELROUTE:
case RTM_GETROUTE:
rtm = NLMSG_DATA(nlh);
rtm->rtm_flags = tswap32(rtm->rtm_flags);
host_to_target_route_rtattr(RTM_RTA(rtm),
nlmsg_len - NLMSG_LENGTH(sizeof(*rtm)));
break;
default:
return -TARGET_EINVAL;
}
return 0;
}
static inline abi_long host_to_target_nlmsg_route(struct nlmsghdr *nlh,
size_t len)
{
return host_to_target_for_each_nlmsg(nlh, len, host_to_target_data_route);
}
static abi_long target_to_host_for_each_rtattr(struct rtattr *rtattr,
size_t len,
abi_long (*target_to_host_rtattr)
(struct rtattr *))
{
abi_long ret;
while (len >= sizeof(struct rtattr)) {
if (tswap16(rtattr->rta_len) < sizeof(struct rtattr) ||
tswap16(rtattr->rta_len) > len) {
break;
}
rtattr->rta_len = tswap16(rtattr->rta_len);
rtattr->rta_type = tswap16(rtattr->rta_type);
ret = target_to_host_rtattr(rtattr);
if (ret < 0) {
return ret;
}
len -= RTA_ALIGN(rtattr->rta_len);
rtattr = (struct rtattr *)(((char *)rtattr) +
RTA_ALIGN(rtattr->rta_len));
}
return 0;
}
static abi_long target_to_host_data_link_rtattr(struct rtattr *rtattr)
{
switch (rtattr->rta_type) {
default:
gemu_log("Unknown target IFLA type: %d\n", rtattr->rta_type);
break;
}
return 0;
}
static abi_long target_to_host_data_addr_rtattr(struct rtattr *rtattr)
{
switch (rtattr->rta_type) {
/* binary: depends on family type */
case IFA_LOCAL:
case IFA_ADDRESS:
break;
default:
gemu_log("Unknown target IFA type: %d\n", rtattr->rta_type);
break;
}
return 0;
}
static abi_long target_to_host_data_route_rtattr(struct rtattr *rtattr)
{
uint32_t *u32;
switch (rtattr->rta_type) {
/* binary: depends on family type */
case RTA_DST:
case RTA_SRC:
case RTA_GATEWAY:
break;
/* u32 */
case RTA_OIF:
u32 = RTA_DATA(rtattr);
*u32 = tswap32(*u32);
break;
default:
gemu_log("Unknown target RTA type: %d\n", rtattr->rta_type);
break;
}
return 0;
}
static void target_to_host_link_rtattr(struct rtattr *rtattr,
uint32_t rtattr_len)
{
target_to_host_for_each_rtattr(rtattr, rtattr_len,
target_to_host_data_link_rtattr);
}
static void target_to_host_addr_rtattr(struct rtattr *rtattr,
uint32_t rtattr_len)
{
target_to_host_for_each_rtattr(rtattr, rtattr_len,
target_to_host_data_addr_rtattr);
}
static void target_to_host_route_rtattr(struct rtattr *rtattr,
uint32_t rtattr_len)
{
target_to_host_for_each_rtattr(rtattr, rtattr_len,
target_to_host_data_route_rtattr);
}
static abi_long target_to_host_data_route(struct nlmsghdr *nlh)
{
struct ifinfomsg *ifi;
struct ifaddrmsg *ifa;
struct rtmsg *rtm;
switch (nlh->nlmsg_type) {
case RTM_GETLINK:
break;
case RTM_NEWLINK:
case RTM_DELLINK:
ifi = NLMSG_DATA(nlh);
ifi->ifi_type = tswap16(ifi->ifi_type);
ifi->ifi_index = tswap32(ifi->ifi_index);
ifi->ifi_flags = tswap32(ifi->ifi_flags);
ifi->ifi_change = tswap32(ifi->ifi_change);
target_to_host_link_rtattr(IFLA_RTA(ifi), nlh->nlmsg_len -
NLMSG_LENGTH(sizeof(*ifi)));
break;
case RTM_GETADDR:
case RTM_NEWADDR:
case RTM_DELADDR:
ifa = NLMSG_DATA(nlh);
ifa->ifa_index = tswap32(ifa->ifa_index);
target_to_host_addr_rtattr(IFA_RTA(ifa), nlh->nlmsg_len -
NLMSG_LENGTH(sizeof(*ifa)));
break;
case RTM_GETROUTE:
break;
case RTM_NEWROUTE:
case RTM_DELROUTE:
rtm = NLMSG_DATA(nlh);
rtm->rtm_flags = tswap32(rtm->rtm_flags);
target_to_host_route_rtattr(RTM_RTA(rtm), nlh->nlmsg_len -
NLMSG_LENGTH(sizeof(*rtm)));
break;
default:
return -TARGET_EOPNOTSUPP;
}
return 0;
}
static abi_long target_to_host_nlmsg_route(struct nlmsghdr *nlh, size_t len)
{
return target_to_host_for_each_nlmsg(nlh, len, target_to_host_data_route);
}
/* do_setsockopt() Must return target values and target errnos. */
static abi_long do_setsockopt(int sockfd, int level, int optname,
abi_ulong optval_addr, socklen_t optlen)
@ -2165,6 +2691,21 @@ static TargetFdTrans target_packet_trans = {
.target_to_host_addr = packet_target_to_host_sockaddr,
};
static abi_long netlink_route_target_to_host(void *buf, size_t len)
{
return target_to_host_nlmsg_route(buf, len);
}
static abi_long netlink_route_host_to_target(void *buf, size_t len)
{
return host_to_target_nlmsg_route(buf, len);
}
static TargetFdTrans target_netlink_route_trans = {
.target_to_host_data = netlink_route_target_to_host,
.host_to_target_data = netlink_route_host_to_target,
};
/* do_socket() Must return target values and target errnos. */
static abi_long do_socket(int domain, int type, int protocol)
{
@ -2176,8 +2717,10 @@ static abi_long do_socket(int domain, int type, int protocol)
return ret;
}
if (domain == PF_NETLINK)
return -TARGET_EAFNOSUPPORT;
if (domain == PF_NETLINK &&
protocol != NETLINK_ROUTE) {
return -EPFNOSUPPORT;
}
if (domain == AF_PACKET ||
(domain == AF_INET && type == SOCK_PACKET)) {
@ -2192,6 +2735,14 @@ static abi_long do_socket(int domain, int type, int protocol)
* if socket type is SOCK_PACKET, bind by name
*/
fd_trans_register(ret, &target_packet_trans);
} else if (domain == PF_NETLINK) {
switch (protocol) {
case NETLINK_ROUTE:
fd_trans_register(ret, &target_netlink_route_trans);
break;
default:
g_assert_not_reached();
}
}
}
return ret;
@ -2276,14 +2827,25 @@ static abi_long do_sendrecvmsg_locked(int fd, struct target_msghdr *msgp,
msg.msg_iov = vec;
if (send) {
ret = target_to_host_cmsg(&msg, msgp);
if (ret == 0)
if (fd_trans_target_to_host_data(fd)) {
ret = fd_trans_target_to_host_data(fd)(msg.msg_iov->iov_base,
msg.msg_iov->iov_len);
} else {
ret = target_to_host_cmsg(&msg, msgp);
}
if (ret == 0) {
ret = get_errno(sendmsg(fd, &msg, flags));
}
} else {
ret = get_errno(recvmsg(fd, &msg, flags));
if (!is_error(ret)) {
len = ret;
ret = host_to_target_cmsg(msgp, &msg);
if (fd_trans_host_to_target_data(fd)) {
ret = fd_trans_host_to_target_data(fd)(msg.msg_iov->iov_base,
msg.msg_iov->iov_len);
} else {
ret = host_to_target_cmsg(msgp, &msg);
}
if (!is_error(ret)) {
msgp->msg_namelen = tswap32(msg.msg_namelen);
if (msg.msg_name != NULL) {
@ -2510,6 +3072,13 @@ static abi_long do_sendto(int fd, abi_ulong msg, size_t len, int flags,
host_msg = lock_user(VERIFY_READ, msg, len, 1);
if (!host_msg)
return -TARGET_EFAULT;
if (fd_trans_target_to_host_data(fd)) {
ret = fd_trans_target_to_host_data(fd)(host_msg, len);
if (ret < 0) {
unlock_user(host_msg, msg, 0);
return ret;
}
}
if (target_addr) {
addr = alloca(addrlen+1);
ret = target_to_host_sockaddr(fd, addr, target_addr, addrlen);