Both guest options map to host SO_TIMESTAMP while keeping a global bit to
remember if the guest expects the old or the new format. Don't support
programs mixing two formats.
Added a multiarch test to verify.
Signed-off-by: Shu-Chun Weng <s...@google.com>
---
v1 -> v2:
Only keep track of old or new format globally, remove support for different
sockets mixing different formats.
Fix style problems.
linux-user/alpha/sockbits.h | 8 +-
linux-user/generic/sockbits.h | 9 +-
linux-user/hppa/sockbits.h | 8 +-
linux-user/mips/sockbits.h | 8 +-
linux-user/sparc/sockbits.h | 8 +-
linux-user/strace.c | 7 +-
linux-user/syscall.c | 91 ++++++--
tests/tcg/multiarch/socket_timestamp.c | 296 +++++++++++++++++++++++++
8 files changed, 408 insertions(+), 27 deletions(-)
create mode 100644 tests/tcg/multiarch/socket_timestamp.c
diff --git a/linux-user/alpha/sockbits.h b/linux-user/alpha/sockbits.h
index d54dc98c09..40f0644df0 100644
--- a/linux-user/alpha/sockbits.h
+++ b/linux-user/alpha/sockbits.h
@@ -48,8 +48,6 @@
#define TARGET_SO_DETACH_FILTER 27
#define TARGET_SO_PEERNAME 28
-#define TARGET_SO_TIMESTAMP 29
-#define TARGET_SCM_TIMESTAMP TARGET_SO_TIMESTAMP
#define TARGET_SO_PEERSEC 30
#define TARGET_SO_PASSSEC 34
@@ -75,6 +73,12 @@
/* Instruct lower device to use last 4-bytes of skb data as FCS */
#define TARGET_SO_NOFCS 43
+#define TARGET_SO_TIMESTAMP_OLD 29
+#define TARGET_SCM_TIMESTAMP_OLD TARGET_SO_TIMESTAMP_OLD
+
+#define TARGET_SO_TIMESTAMP_NEW 63
+#define TARGET_SCM_TIMESTAMP_NEW TARGET_SO_TIMESTAMP_NEW
+
/* TARGET_O_NONBLOCK clashes with the bits used for socket types. Therefore we
* have to define SOCK_NONBLOCK to a different value here.
*/
diff --git a/linux-user/generic/sockbits.h b/linux-user/generic/sockbits.h
index e44733c601..532cf2d3dc 100644
--- a/linux-user/generic/sockbits.h
+++ b/linux-user/generic/sockbits.h
@@ -49,10 +49,15 @@
#define TARGET_SO_DETACH_FILTER 27
#define TARGET_SO_PEERNAME 28
-#define TARGET_SO_TIMESTAMP 29
-#define TARGET_SCM_TIMESTAMP TARGET_SO_TIMESTAMP
#define TARGET_SO_ACCEPTCONN 30
#define TARGET_SO_PEERSEC 31
+
+#define TARGET_SO_TIMESTAMP_OLD 29
+#define TARGET_SCM_TIMESTAMP_OLD TARGET_SO_TIMESTAMP_OLD
+
+#define TARGET_SO_TIMESTAMP_NEW 63
+#define TARGET_SCM_TIMESTAMP_NEW TARGET_SO_TIMESTAMP_NEW
+
#endif
diff --git a/linux-user/hppa/sockbits.h b/linux-user/hppa/sockbits.h
index 23f69a3293..284a47e74e 100644
--- a/linux-user/hppa/sockbits.h
+++ b/linux-user/hppa/sockbits.h
@@ -29,8 +29,6 @@
#define TARGET_SO_BSDCOMPAT 0x400e
#define TARGET_SO_PASSCRED 0x4010
#define TARGET_SO_PEERCRED 0x4011
-#define TARGET_SO_TIMESTAMP 0x4012
-#define TARGET_SCM_TIMESTAMP TARGET_SO_TIMESTAMP
#define TARGET_SO_TIMESTAMPNS 0x4013
#define TARGET_SCM_TIMESTAMPNS TARGET_SO_TIMESTAMPNS
@@ -67,6 +65,12 @@
#define TARGET_SO_CNX_ADVICE 0x402E
+#define TARGET_SO_TIMESTAMP_OLD 0x4012
+#define TARGET_SCM_TIMESTAMP_OLD TARGET_SO_TIMESTAMP_OLD
+
+#define TARGET_SO_TIMESTAMP_NEW 0x4038
+#define TARGET_SCM_TIMESTAMP_NEW TARGET_SO_TIMESTAMP_NEW
+
/* TARGET_O_NONBLOCK clashes with the bits used for socket types. Therefore we
* have to define SOCK_NONBLOCK to a different value here.
*/
diff --git a/linux-user/mips/sockbits.h b/linux-user/mips/sockbits.h
index 0f022cd598..b4c39d9588 100644
--- a/linux-user/mips/sockbits.h
+++ b/linux-user/mips/sockbits.h
@@ -61,14 +61,18 @@
#define TARGET_SO_DETACH_FILTER 27
#define TARGET_SO_PEERNAME 28
-#define TARGET_SO_TIMESTAMP 29
-#define SCM_TIMESTAMP SO_TIMESTAMP
#define TARGET_SO_PEERSEC 30
#define TARGET_SO_SNDBUFFORCE 31
#define TARGET_SO_RCVBUFFORCE 33
#define TARGET_SO_PASSSEC 34
+#define TARGET_SO_TIMESTAMP_OLD 29
+#define TARGET_SCM_TIMESTAMP_OLD TARGET_SO_TIMESTAMP_OLD
+
+#define TARGET_SO_TIMESTAMP_NEW 63
+#define TARGET_SCM_TIMESTAMP_NEW TARGET_SO_TIMESTAMP_NEW
+
/** sock_type - Socket types
*
* Please notice that for binary compat reasons MIPS has to
diff --git a/linux-user/sparc/sockbits.h b/linux-user/sparc/sockbits.h
index 0a822e3e1f..07440efd14 100644
--- a/linux-user/sparc/sockbits.h
+++ b/linux-user/sparc/sockbits.h
@@ -48,8 +48,6 @@
#define TARGET_SO_GET_FILTER TARGET_SO_ATTACH_FILTER
#define TARGET_SO_PEERNAME 0x001c
-#define TARGET_SO_TIMESTAMP 0x001d
-#define TARGET_SCM_TIMESTAMP TARGET_SO_TIMESTAMP
#define TARGET_SO_PEERSEC 0x001e
#define TARGET_SO_PASSSEC 0x001f
@@ -104,6 +102,12 @@
#define TARGET_SO_ZEROCOPY 0x003e
+#define TARGET_SO_TIMESTAMP_OLD 0x001d
+#define TARGET_SCM_TIMESTAMP_OLD TARGET_SO_TIMESTAMP_OLD
+
+#define TARGET_SO_TIMESTAMP_NEW 0x0046
+#define TARGET_SCM_TIMESTAMP_NEW TARGET_SO_TIMESTAMP_NEW
+
/* Security levels - as per NRL IPv6 - don't actually do anything */
#define TARGET_SO_SECURITY_AUTHENTICATION 0x5001
#define TARGET_SO_SECURITY_ENCRYPTION_TRANSPORT 0x5002
diff --git a/linux-user/strace.c b/linux-user/strace.c
index 089fb3968e..a11a5e9e86 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -2257,8 +2257,11 @@ print_optint:
case TARGET_SO_PASSCRED:
qemu_log("SO_PASSCRED,");
goto print_optint;
- case TARGET_SO_TIMESTAMP:
- qemu_log("SO_TIMESTAMP,");
+ case TARGET_SO_TIMESTAMP_OLD:
+ qemu_log("SO_TIMESTAMP_OLD,");
+ goto print_optint;
+ case TARGET_SO_TIMESTAMP_NEW:
+ qemu_log("SO_TIMESTAMP_NEW,");
goto print_optint;
case TARGET_SO_RCVLOWAT:
qemu_log("SO_RCVLOWAT,");
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index cda194a7cc..e6b1a18cc0 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1697,6 +1697,18 @@ static inline abi_long target_to_host_cmsg(struct msghdr
*msgh,
return 0;
}
+/*
+ * Linux kernel actually keeps track of whether the old version (potentially
+ * 32-bit time_t) or the new version is used for each socket. Instead of
+ * replicate it will all the complexity, we only keep track of one global
state,
+ * which is enough for guest programs that don't intentionally mix the two
+ * versions.
+ */
+static enum TargetTimestampVersion {
+ TARGET_TIMESTAMP_OLD,
+ TARGET_TIMESTAMP_NEW,
+} target_expected_timestamp_version = TARGET_TIMESTAMP_OLD;
+
static inline abi_long host_to_target_cmsg(struct target_msghdr *target_msgh,
struct msghdr *msgh)
{
@@ -1747,8 +1759,17 @@ static inline abi_long host_to_target_cmsg(struct
target_msghdr *target_msgh,
switch (cmsg->cmsg_level) {
case SOL_SOCKET:
switch (cmsg->cmsg_type) {
- case SO_TIMESTAMP:
- tgt_len = sizeof(struct target_timeval);
+ case SCM_TIMESTAMP:
+ switch (target_expected_timestamp_version) {
+ case TARGET_TIMESTAMP_OLD:
+ tgt_len = sizeof(struct target_timeval);
+ target_cmsg->cmsg_type = tswap32(TARGET_SCM_TIMESTAMP_OLD);
+ break;
+ case TARGET_TIMESTAMP_NEW:
+ tgt_len = sizeof(struct target__kernel_sock_timeval);
+ target_cmsg->cmsg_type = tswap32(TARGET_SCM_TIMESTAMP_NEW);
+ break;
+ }
break;
default:
break;
@@ -1782,20 +1803,39 @@ static inline abi_long host_to_target_cmsg(struct
target_msghdr *target_msgh,
}
break;
}
- case SO_TIMESTAMP:
+ case SCM_TIMESTAMP:
{
struct timeval *tv = (struct timeval *)data;
- struct target_timeval *target_tv =
- (struct target_timeval *)target_data;
-
- if (len != sizeof(struct timeval) ||
- tgt_len != sizeof(struct target_timeval)) {
+ if (len != sizeof(struct timeval)) {
goto unimplemented;
}
- /* copy struct timeval to target */
- __put_user(tv->tv_sec, &target_tv->tv_sec);
- __put_user(tv->tv_usec, &target_tv->tv_usec);
+ switch (target_expected_timestamp_version) {
+ case TARGET_TIMESTAMP_OLD:
+ {
+ struct target_timeval *target_tv =
+ (struct target_timeval *)target_data;
+ if (tgt_len != sizeof(struct target_timeval)) {
+ goto unimplemented;
+ }
+
+ __put_user(tv->tv_sec, &target_tv->tv_sec);
+ __put_user(tv->tv_usec, &target_tv->tv_usec);
+ break;
+ }
+ case TARGET_TIMESTAMP_NEW:
+ {
+ struct target__kernel_sock_timeval *target_tv =
+ (struct target__kernel_sock_timeval *)target_data;
+ if (tgt_len != sizeof(struct target__kernel_sock_timeval))
{
+ goto unimplemented;
+ }
+
+ __put_user(tv->tv_sec, &target_tv->tv_sec);
+ __put_user(tv->tv_usec, &target_tv->tv_usec);
+ break;
+ }
+ }
break;
}
case SCM_CREDENTIALS:
@@ -1937,6 +1977,8 @@ static abi_long do_setsockopt(int sockfd, int level, int
optname,
int val;
struct ip_mreqn *ip_mreq;
struct ip_mreq_source *ip_mreq_source;
+ enum TargetTimestampVersion target_timestamp_version =
+ target_expected_timestamp_version;
switch(level) {
case SOL_TCP:
@@ -2331,9 +2373,14 @@ set_timeout:
case TARGET_SO_PASSSEC:
optname = SO_PASSSEC;
break;
- case TARGET_SO_TIMESTAMP:
- optname = SO_TIMESTAMP;
- break;
+ case TARGET_SO_TIMESTAMP_OLD:
+ target_timestamp_version = TARGET_TIMESTAMP_OLD;
+ optname = SO_TIMESTAMP;
+ break;
+ case TARGET_SO_TIMESTAMP_NEW:
+ target_timestamp_version = TARGET_TIMESTAMP_NEW;
+ optname = SO_TIMESTAMP;
+ break;
case TARGET_SO_RCVLOWAT:
optname = SO_RCVLOWAT;
break;
@@ -2346,6 +2393,9 @@ set_timeout:
if (get_user_u32(val, optval_addr))
return -TARGET_EFAULT;
ret = get_errno(setsockopt(sockfd, SOL_SOCKET, optname, &val,
sizeof(val)));
+ if (!is_error(ret) && optname == SO_TIMESTAMP) {
+ target_expected_timestamp_version = target_timestamp_version;
+ }
break;
#ifdef SOL_NETLINK
case SOL_NETLINK:
@@ -2396,6 +2446,7 @@ static abi_long do_getsockopt(int sockfd, int level, int
optname,
abi_long ret;
int len, val;
socklen_t lv;
+ int timestamp_format_matches = 0;
switch(level) {
case TARGET_SOL_SOCKET:
@@ -2576,7 +2627,14 @@ get_timeout:
case TARGET_SO_PASSCRED:
optname = SO_PASSCRED;
goto int_case;
- case TARGET_SO_TIMESTAMP:
+ case TARGET_SO_TIMESTAMP_OLD:
+ timestamp_format_matches =
+ (target_expected_timestamp_version == TARGET_TIMESTAMP_OLD);
+ optname = SO_TIMESTAMP;
+ goto int_case;
+ case TARGET_SO_TIMESTAMP_NEW:
+ timestamp_format_matches =
+ (target_expected_timestamp_version == TARGET_TIMESTAMP_NEW);
optname = SO_TIMESTAMP;
goto int_case;
case TARGET_SO_RCVLOWAT:
@@ -2604,6 +2662,9 @@ get_timeout:
if (optname == SO_TYPE) {
val = host_to_target_sock_type(val);
}
+ if (optname == SO_TIMESTAMP) {
+ val = val && timestamp_format_matches;
+ }
if (len > lv)
len = lv;
if (len == 4) {
diff --git a/tests/tcg/multiarch/socket_timestamp.c
b/tests/tcg/multiarch/socket_timestamp.c
new file mode 100644
index 0000000000..71ab1845de
--- /dev/null
+++ b/tests/tcg/multiarch/socket_timestamp.c
@@ -0,0 +1,296 @@
+#include <assert.h>
+#include <errno.h>
+#include <linux/types.h>
+#include <netinet/in.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#ifdef __kernel_old_timeval
+#define kernel_old_timeval __kernel_old_timeval
+#else
+struct kernel_old_timeval {
+ __kernel_long_t tv_sec;
+ __kernel_long_t tv_usec;
+};
+#endif
+
+struct kernel_sock_timeval {
+ int64_t tv_sec;
+ int64_t tv_usec;
+};
+
+int create_udp_socket(struct sockaddr_in *sockaddr)
+{
+ socklen_t sockaddr_len;
+ int sock = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock < 0) {
+ int err = errno;
+ fprintf(stderr, "Failed to create server socket: %s\n", strerror(err));
+ exit(err);
+ }
+
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->sin_family = AF_INET;
+ sockaddr->sin_port = htons(0); /* let kernel select a port for us */
+ sockaddr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+ if (bind(sock, (struct sockaddr *)sockaddr, sizeof(*sockaddr)) < 0) {
+ int err = errno;
+ fprintf(stderr, "Failed to bind server socket: %s\n", strerror(err));
+ exit(err);
+ }
+
+ sockaddr_len = sizeof(*sockaddr);
+ if (getsockname(sock, (struct sockaddr *)sockaddr, &sockaddr_len) < 0) {
+ int err = errno;
+ fprintf(stderr, "Failed to get socket name: %s\n", strerror(err));
+ exit(err);
+ }
+ return sock;
+}
+
+/*
+ * Checks that the timestamp in the message is not after the reception
timestamp
+ * as well as the reception time is within 10 seconds of the message time.
+ */
+void check_timestamp_difference(const struct timeval *msg_tv,
+ const struct timeval *pkt_tv)
+{
+ if (pkt_tv->tv_sec < msg_tv->tv_sec ||
+ (pkt_tv->tv_sec == msg_tv->tv_sec && pkt_tv->tv_usec <
msg_tv->tv_usec))
+ {
+ fprintf(stderr,
+ "Packet received before sent: %lld.%06lld < %lld.%06lld\n",
+ (long long)pkt_tv->tv_sec, (long long)pkt_tv->tv_usec,
+ (long long)msg_tv->tv_sec, (long long)msg_tv->tv_usec);
+ exit(-1);
+ }
+
+ if (pkt_tv->tv_sec > msg_tv->tv_sec + 10 ||
+ (pkt_tv->tv_sec == msg_tv->tv_sec + 10 &&
+ pkt_tv->tv_usec > msg_tv->tv_usec)) {
+ fprintf(stderr,
+ "Packet received more than 10 seconds after sent: "
+ "%lld.%06lld > %lld.%06lld + 10\n",
+ (long long)pkt_tv->tv_sec, (long long)pkt_tv->tv_usec,
+ (long long)msg_tv->tv_sec, (long long)msg_tv->tv_usec);
+ exit(-1);
+ }
+}
+
+void send_current_time(int sock, struct sockaddr_in server_sockaddr)
+{
+ struct timeval tv = {0, 0};
+ gettimeofday(&tv, NULL);
+ sendto(sock, &tv, sizeof(tv), 0, (struct sockaddr *)&server_sockaddr,
+ sizeof(server_sockaddr));
+}
+
+typedef void (*get_timeval_t)(const struct cmsghdr *cmsg, struct timeval *tv);
+
+
+void receive_packet(int sock, get_timeval_t get_timeval)
+{
+ struct msghdr msg = {0};
+
+ char iobuf[1024];
+ struct iovec iov;
+
+ union {
+ /*
+ * 128 bytes are enough for all existing
+ * timeval/timespec/scm_timestamping structures.
+ */
+ char cmsg_buf[CMSG_SPACE(128)];
+ struct cmsghdr align;
+ } u;
+ struct cmsghdr *cmsg;
+ struct timeval msg_tv, pkt_tv;
+
+ int res;
+
+ iov.iov_base = iobuf;
+ iov.iov_len = sizeof(iobuf);
+
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = (caddr_t)u.cmsg_buf;
+ msg.msg_controllen = sizeof(u.cmsg_buf);
+
+ res = recvmsg(sock, &msg, 0);
+ if (res < 0) {
+ int err = errno;
+ fprintf(stderr, "Failed to receive packet: %s\n", strerror(err));
+ exit(err);
+ }
+
+ assert(res == sizeof(struct timeval));
+ assert(iov.iov_base == iobuf);
+ memcpy(&msg_tv, iov.iov_base, sizeof(msg_tv));
+ printf("Message timestamp: %lld.%06lld\n",
+ (long long)msg_tv.tv_sec, (long long)msg_tv.tv_usec);
+
+ cmsg = CMSG_FIRSTHDR(&msg);
+ assert(cmsg);
+ (*get_timeval)(cmsg, &pkt_tv);
+ printf("Packet timestamp: %lld.%06lld\n",
+ (long long)pkt_tv.tv_sec, (long long)pkt_tv.tv_usec);
+
+ check_timestamp_difference(&msg_tv, &pkt_tv);
+}
+
+void get_timeval_from_so_timestamp(const struct cmsghdr *cmsg,
+ struct timeval *tv)
+{
+ assert(cmsg->cmsg_level == SOL_SOCKET);
+ assert(cmsg->cmsg_type == SCM_TIMESTAMP);
+ assert(cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)));
+ memcpy(tv, CMSG_DATA(cmsg), sizeof(*tv));
+}
+
+#ifdef SO_TIMESTAMP_OLD
+void get_timeval_from_so_timestamp_old(const struct cmsghdr *cmsg,
+ struct timeval *tv)
+{
+ struct kernel_old_timeval old_tv;
+ assert(cmsg->cmsg_level == SOL_SOCKET);
+ assert(cmsg->cmsg_type == SO_TIMESTAMP_OLD);
+ assert(cmsg->cmsg_len == CMSG_LEN(sizeof(old_tv)));
+
+ memcpy(&old_tv, CMSG_DATA(cmsg), sizeof(old_tv));
+ tv->tv_sec = old_tv.tv_sec;
+ tv->tv_usec = old_tv.tv_usec;
+}
+
+#ifdef SO_TIMESTAMP_NEW
+void get_timeval_from_so_timestamp_new(const struct cmsghdr *cmsg,
+ struct timeval *tv)
+{
+ struct kernel_sock_timeval sock_tv;
+ assert(cmsg->cmsg_level == SOL_SOCKET);
+ assert(cmsg->cmsg_type == SO_TIMESTAMP_NEW);
+ assert(cmsg->cmsg_len == CMSG_LEN(sizeof(sock_tv)));
+
+ memcpy(&sock_tv, CMSG_DATA(cmsg), sizeof(sock_tv));
+ tv->tv_sec = sock_tv.tv_sec;
+ tv->tv_usec = sock_tv.tv_usec;
+}
+#endif /* defined(SO_TIMESTAMP_NEW) */
+#endif /* defined(SO_TIMESTAMP_OLD) */
+
+void set_socket_option(int sock, int sockopt, int on)
+{
+ socklen_t len;
+ int val = on;
+ if (setsockopt(sock, SOL_SOCKET, sockopt, &val, sizeof(val)) < 0) {
+ int err = errno;
+ fprintf(stderr, "Failed to setsockopt %d (%s): %s\n",
+ sockopt, on ? "on" : "off", strerror(err));
+ exit(err);
+ }
+
+ len = sizeof(val);
+ val = -1;
+ if (getsockopt(sock, SOL_SOCKET, sockopt, &val, &len) < 0) {
+ int err = errno;
+ fprintf(stderr, "Failed to getsockopt (%d): %s\n", sock,
strerror(err));
+ exit(err);
+ }
+ assert(len == sizeof(val));
+ assert(val == on);
+}
+
+int main(int argc, char **argv)
+{
+ int parent_sock, child_sock;
+ struct sockaddr_in parent_sockaddr, child_sockaddr;
+ int pid;
+ struct timeval tv = {0, 0};
+ gettimeofday(&tv, NULL);
+
+ parent_sock = create_udp_socket(&parent_sockaddr);
+ child_sock = create_udp_socket(&child_sockaddr);
+
+ printf("Parent sock bound to port %d\nChild sock bound to port %d\n",
+ parent_sockaddr.sin_port, child_sockaddr.sin_port);
+
+ pid = fork();
+ if (pid < 0) {
+ fprintf(stderr, "SKIPPED. Failed to fork: %s\n", strerror(errno));
+ } else if (pid == 0) {
+ close(child_sock);
+
+ /* Test 1: SO_TIMESTAMP */
+ send_current_time(parent_sock, child_sockaddr);
+
+ if (tv.tv_sec > 0x7fffff00) {
+ /* Too close to y2038 problem, old system may not work. */
+ close(parent_sock);
+ return 0;
+ }
+
+#ifdef SO_TIMESTAMP_OLD
+ if (SO_TIMESTAMP_OLD != SO_TIMESTAMP) {
+ /* Test 2a: SO_TIMESTAMP_OLD */
+ set_socket_option(parent_sock, SO_TIMESTAMP_OLD, 1);
+ receive_packet(parent_sock, &get_timeval_from_so_timestamp_old);
+ set_socket_option(parent_sock, SO_TIMESTAMP_OLD, 0);
+ }
+#ifdef SO_TIMESTAMP_NEW
+ else {
+ /* Test 2b: SO_TIMESTAMP_NEW */
+ set_socket_option(parent_sock, SO_TIMESTAMP_NEW, 1);
+ receive_packet(parent_sock, &get_timeval_from_so_timestamp_new);
+ set_socket_option(parent_sock, SO_TIMESTAMP_NEW, 0);
+ }
+#endif /* defined(SO_TIMESTAMP_NEW) */
+#endif /* defined(SO_TIMESTAMP_OLD) */
+
+ close(parent_sock);
+ } else {
+ int child_status;
+ close(parent_sock);
+
+ /* Test 1: SO_TIMESTAMP */
+ set_socket_option(child_sock, SO_TIMESTAMP, 1);
+ receive_packet(child_sock, &get_timeval_from_so_timestamp);
+ set_socket_option(child_sock, SO_TIMESTAMP, 0);
+
+ if (tv.tv_sec > 0x7fffff00) {
+ /* Too close to y2038 problem, old system may not work. */
+ close(child_sock);
+ return 0;
+ }
+
+#ifdef SO_TIMESTAMP_OLD
+ if (SO_TIMESTAMP_OLD != SO_TIMESTAMP) {
+ /* Test 2a: SO_TIMESTAMP_OLD */
+ send_current_time(child_sock, parent_sockaddr);
+ }
+#ifdef SO_TIMESTAMP_NEW
+ else {
+ /* Test 2b: SO_TIMESTAMP_NEW */
+ send_current_time(child_sock, parent_sockaddr);
+ }
+#endif /* defined(SO_TIMESTAMP_NEW) */
+#endif /* defined(SO_TIMESTAMP_OLD) */
+
+ close(child_sock);
+
+ if (waitpid(pid, &child_status, 0) < 0) {
+ int err = errno;
+ fprintf(stderr, "Final wait() failed: %s\n", strerror(err));
+ return err;
+ }
+ return child_status;
+ }
+ return 0;
+}
--
2.28.0.220.ged08abb693-goog
