7486e6e4e1
Many GPS radios provide both a 1-PPS and time of day information via NMEA sentences. This patch introduces a ts2phc master that decodes the "recommended minimum data" sentence, RMC, which provides UTC time and a validity flag. Together with the file based leap second table, this sentence provides adequate time of day for determining the time of the PPS edge. Signed-off-by: Richard Cochran <richardcochran@gmail.com>
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/**
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* @file sock.c
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* @note Copyright (C) 2020 Richard Cochran <richardcochran@gmail.com>
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* @note SPDX-License-Identifier: GPL-2.0+
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*/
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#include <netdb.h>
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#include <netinet/tcp.h>
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#include <string.h>
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#include <unistd.h>
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#include "print.h"
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#include "sock.h"
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typedef void *so_t;
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int sock_open(const char *server, const char *port)
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{
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int i, err, family[2] = { AF_INET, AF_INET6 }, fd;
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struct addrinfo hints, *result = NULL;
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socklen_t addrlen;
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memset(&hints, 0, sizeof(hints));
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hints.ai_flags = AI_CANONNAME;
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hints.ai_socktype = SOCK_STREAM;
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for (i = 0; i < 2; i++) {
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hints.ai_family = family[i];
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err = getaddrinfo(server, port, &hints, &result);
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if (err) {
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pr_debug("%s: getaddrinfo failed family %d: %s",
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__func__, hints.ai_family, gai_strerror(err));
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result = NULL;
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} else {
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break;
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}
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}
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if (!result) {
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return -1;
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}
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addrlen = (socklen_t) result->ai_addrlen;
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pr_debug("%s: connecting to server %s canonical %s",
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__func__, server, result->ai_canonname);
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fd = socket(result->ai_family, SOCK_STREAM, result->ai_protocol);
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if (fd < 0) {
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pr_err("%s: socket failed: %m", __func__);
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goto failed;
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}
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if (connect(fd, result->ai_addr, addrlen) < 0) {
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pr_err("%s: connect failed: %m", __func__);
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close(fd);
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fd = -1;
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}
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failed:
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freeaddrinfo(result);
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return fd;
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}
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