101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <linux/if.h>
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#include <linux/errqueue.h>
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#include <linux/net_tstamp.h>
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#define SIOCSHWTSTAMP 0x89b0
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#define SIOCGHWTSTAMP 0x89b1
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ssize_t ts_sendmsg(int sd, const struct msghdr *msg, int flags, struct timespec *ts)
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{
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return sendmsg(sd, msg, flags);
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}
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ssize_t ts_recvmsg(int sd, struct msghdr *msgh, int flags, struct timespec *ts, int *key, int *id)
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{
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char buf[1024];
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msgh->msg_control = &buf;
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msgh->msg_controllen = sizeof(buf);
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struct cmsghdr *cmsg;
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struct sock_extended_err *serr = NULL;
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struct timespec *tss = NULL;
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int ret = recvmsg(sd, msgh, flags);
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if (ret >= 0) {
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for (cmsg = CMSG_FIRSTHDR(msgh); cmsg != NULL; cmsg = CMSG_NXTHDR(msgh, cmsg)) {
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if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_TIMESTAMPING)
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tss = (struct timespec *) CMSG_DATA(cmsg);
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else if ((cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_RECVERR) ||
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(cmsg->cmsg_level == SOL_IPV6 && cmsg->cmsg_type == IPV6_RECVERR))
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serr = (struct sock_extended_err *) CMSG_DATA(cmsg);
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}
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if (!tss)
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return -2;
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for (int i = 0; i < 3; i++)
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ts[i] = tss[i];
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if (serr) {
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*key = serr->ee_info;
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*id = serr->ee_data;
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}
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}
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return ret;
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}
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void ts_print(struct timespec *ts)
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{
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printf("%lld.%.9ld\n", (long long) ts->tv_sec, ts->tv_nsec);
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}
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int ts_enable_sd(int sd)
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{
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int val;
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/* Enable kernel / hw timestamping */
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val = SOF_TIMESTAMPING_RX_SOFTWARE | SOF_TIMESTAMPING_TX_SOFTWARE; /* Enable SW timestamps */
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// val |= SOF_TIMESTAMPING_TX_HARDWARE | SOF_TIMESTAMPING_RX_HARDWARE; /* Enable HW timestamps */
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val |= SOF_TIMESTAMPING_SOFTWARE; //| SOF_TIMESTAMPING_RAW_HARDWARE; /* Report SW and HW timestamps */
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// val |= SOF_TIMESTAMPING_OPT_TSONLY; /* Only return timestamp in cmsg */
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return setsockopt(sd, SOL_SOCKET, SO_TIMESTAMPING, (void *) &val, sizeof(val));
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}
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int ts_enable_if(const char *dev)
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{
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int ret = -1, sd;
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struct hwtstamp_config tsc = {
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.flags = 0,
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.tx_type = HWTSTAMP_TX_ON,
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.rx_filter = HWTSTAMP_FILTER_ALL
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};
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struct ifreq ifr = {
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.ifr_data = (void *) &tsc
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};
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strncpy(ifr.ifr_name, dev, IFNAMSIZ);
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sd = socket(AF_INET, SOCK_DGRAM, 0);
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if (sd >= 0)
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ret = ioctl(sd, SIOCSHWTSTAMP, &ifr);
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close(sd);
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return ret;
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}
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