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linuxptp/config.c

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/**
* @file config.c
* @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <ctype.h>
#include <float.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "ether.h"
#include "hash.h"
#include "print.h"
#include "util.h"
enum config_section {
GLOBAL_SECTION,
PORT_SECTION,
UNKNOWN_SECTION,
};
enum config_type {
CFG_TYPE_INT,
CFG_TYPE_DOUBLE,
};
typedef union {
int i;
double d;
} any_t;
#define CONFIG_LABEL_SIZE 32
#define CFG_ITEM_STATIC (1 << 0) /* statically allocated, not to be freed */
#define CFG_ITEM_LOCKED (1 << 1) /* command line value, may not be changed */
#define CFG_ITEM_PORT (1 << 2) /* item may appear in port sections */
struct config_item {
char label[CONFIG_LABEL_SIZE];
enum config_type type;
unsigned int flags;
any_t val;
any_t min;
any_t max;
};
#define N_CONFIG_ITEMS (sizeof(config_tab) / sizeof(config_tab[0]))
#define CONFIG_ITEM_DBL(_label, _port, _default, _min, _max) { \
.label = _label, \
.type = CFG_TYPE_DOUBLE, \
.flags = _port ? CFG_ITEM_PORT : 0, \
.val.d = _default, \
.min.d = _min, \
.max.d = _max, \
}
#define CONFIG_ITEM_INT(_label, _port, _default, _min, _max) { \
.label = _label, \
.type = CFG_TYPE_INT, \
.flags = _port ? CFG_ITEM_PORT : 0, \
.val.i = _default, \
.min.i = _min, \
.max.i = _max, \
}
#define GLOB_ITEM_DBL(label, _default, min, max) \
CONFIG_ITEM_DBL(label, 0, _default, min, max)
#define GLOB_ITEM_INT(label, _default, min, max) \
CONFIG_ITEM_INT(label, 0, _default, min, max)
#define PORT_ITEM_DBL(label, _default, min, max) \
CONFIG_ITEM_DBL(label, 1, _default, min, max)
#define PORT_ITEM_INT(label, _default, min, max) \
CONFIG_ITEM_INT(label, 1, _default, min, max)
struct config_item config_tab[] = {
GLOB_ITEM_INT("assume_two_step", 0, 0, 1),
GLOB_ITEM_INT("check_fup_sync", 0, 0, 1),
PORT_ITEM_INT("delayAsymmetry", 0, INT_MIN, INT_MAX),
GLOB_ITEM_DBL("first_step_threshold", 0.00002, 0.0, DBL_MAX),
PORT_ITEM_INT("logAnnounceInterval", 1, INT8_MIN, INT8_MAX),
PORT_ITEM_INT("logMinDelayReqInterval", 0, INT8_MIN, INT8_MAX),
PORT_ITEM_INT("logSyncInterval", 0, INT8_MIN, INT8_MAX),
GLOB_ITEM_INT("logging_level", LOG_INFO, PRINT_LEVEL_MIN, PRINT_LEVEL_MAX),
GLOB_ITEM_INT("max_frequency", 900000000, 0, INT_MAX),
GLOB_ITEM_INT("ntpshm_segment", 0, INT_MIN, INT_MAX),
GLOB_ITEM_DBL("pi_integral_const", 0.0, 0.0, DBL_MAX),
GLOB_ITEM_DBL("pi_integral_exponent", 0.4, -DBL_MAX, DBL_MAX),
GLOB_ITEM_DBL("pi_integral_norm_max", 0.3, DBL_MIN, 2.0),
GLOB_ITEM_DBL("pi_integral_scale", 0.0, 0.0, DBL_MAX),
GLOB_ITEM_DBL("pi_proportional_const", 0.0, 0.0, DBL_MAX),
GLOB_ITEM_DBL("pi_proportional_exponent", -0.3, -DBL_MAX, DBL_MAX),
GLOB_ITEM_DBL("pi_proportional_norm_max", 0.7, DBL_MIN, 1.0),
GLOB_ITEM_DBL("pi_proportional_scale", 0.0, 0.0, DBL_MAX),
GLOB_ITEM_DBL("step_threshold", 0.0, 0.0, DBL_MAX),
GLOB_ITEM_INT("tx_timestamp_timeout", 1, 1, INT_MAX),
PORT_ITEM_INT("udp_ttl", 1, 1, 255),
GLOB_ITEM_INT("use_syslog", 1, 0, 1),
GLOB_ITEM_INT("verbose", 0, 0, 1),
};
static struct config_item *config_section_item(struct config *cfg,
const char *section,
const char *name)
{
char buf[CONFIG_LABEL_SIZE + MAX_IFNAME_SIZE];
snprintf(buf, sizeof(buf), "%s.%s", section, name);
return hash_lookup(cfg->htab, buf);
}
static struct config_item *config_global_item(struct config *cfg,
const char *name)
{
return config_section_item(cfg, "global", name);
}
static struct config_item *config_find_item(struct config *cfg,
const char *section,
const char *name)
{
struct config_item *ci;
if (section) {
ci = config_section_item(cfg, section, name);
if (ci) {
return ci;
}
}
return config_global_item(cfg, name);
}
static struct config_item *config_item_alloc(struct config *cfg,
const char *section,
const char *name,
enum config_type type)
{
struct config_item *ci;
char buf[CONFIG_LABEL_SIZE + MAX_IFNAME_SIZE];
ci = calloc(1, sizeof(*ci));
if (!ci) {
fprintf(stderr, "low memory\n");
return NULL;
}
strncpy(ci->label, name, CONFIG_LABEL_SIZE - 1);
ci->type = type;
snprintf(buf, sizeof(buf), "%s.%s", section, ci->label);
if (hash_insert(cfg->htab, buf, ci)) {
fprintf(stderr, "low memory or duplicate item %s\n", name);
free(ci);
return NULL;
}
return ci;
}
static void config_item_free(void *ptr)
{
struct config_item *ci = ptr;
if (ci->flags & CFG_ITEM_STATIC)
return;
free(ci);
}
static enum parser_result parse_section_line(char *s, enum config_section *section)
{
if (!strcasecmp(s, "[global]")) {
*section = GLOBAL_SECTION;
} else if (s[0] == '[') {
char c;
*section = PORT_SECTION;
/* Replace square brackets with white space. */
while (0 != (c = *s)) {
if (c == '[' || c == ']')
*s = ' ';
s++;
}
} else
return NOT_PARSED;
return PARSED_OK;
}
static enum parser_result parse_item(struct config *cfg,
const char *section,
const char *option,
const char *value)
{
struct config_item *cgi, *dst;
enum parser_result r = BAD_VALUE;
double df;
int val;
/* If there is no default value, then the option is bogus. */
cgi = config_global_item(cfg, option);
if (!cgi) {
return NOT_PARSED;
}
switch (cgi->type) {
case CFG_TYPE_INT:
r = get_ranged_int(value, &val, cgi->min.i, cgi->max.i);
break;
case CFG_TYPE_DOUBLE:
r = get_ranged_double(value, &df, cgi->min.d, cgi->max.d);
break;
}
if (r != PARSED_OK) {
return r;
}
if (section) {
if (!(cgi->flags & CFG_ITEM_PORT)) {
return NOT_PARSED;
}
/* Create or update this port specific item. */
dst = config_section_item(cfg, section, option);
if (!dst) {
dst = config_item_alloc(cfg, section, option, cgi->type);
if (!dst) {
return NOT_PARSED;
}
}
} else if (cgi->flags & CFG_ITEM_LOCKED) {
/* This global option was set on the command line. */
return PARSED_OK;
} else {
/* Update the global default value. */
dst = cgi;
}
switch (dst->type) {
case CFG_TYPE_INT:
dst->val.i = val;
break;
case CFG_TYPE_DOUBLE:
dst->val.d = df;
break;
}
return PARSED_OK;
}
static enum parser_result parse_pod_setting(const char *option,
const char *value,
struct port_defaults *pod)
{
int val;
unsigned int uval;
enum parser_result r;
if (!strcmp(option, "logMinPdelayReqInterval")) {
r = get_ranged_int(value, &val, INT8_MIN, INT8_MAX);
if (r != PARSED_OK)
return r;
pod->logMinPdelayReqInterval = val;
} else if (!strcmp(option, "announceReceiptTimeout")) {
r = get_ranged_uint(value, &uval, 2, UINT8_MAX);
if (r != PARSED_OK)
return r;
pod->announceReceiptTimeout = uval;
} else if (!strcmp(option, "syncReceiptTimeout")) {
r = get_ranged_uint(value, &uval, 0, UINT8_MAX);
if (r != PARSED_OK)
return r;
pod->syncReceiptTimeout = uval;
} else if (!strcmp(option, "transportSpecific")) {
r = get_ranged_uint(value, &uval, 0, 0x0F);
if (r != PARSED_OK)
return r;
pod->transportSpecific = uval << 4;
} else if (!strcmp(option, "path_trace_enabled")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
pod->path_trace_enabled = val;
} else if (!strcmp(option, "follow_up_info")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
pod->follow_up_info = val;
} else if (!strcmp(option, "neighborPropDelayThresh")) {
r = get_ranged_uint(value, &uval, 0, UINT32_MAX);
if (r != PARSED_OK)
return r;
pod->neighborPropDelayThresh = uval;
} else if (!strcmp(option, "min_neighbor_prop_delay")) {
r = get_ranged_int(value, &val, INT_MIN, -1);
if (r != PARSED_OK)
return r;
pod->min_neighbor_prop_delay = val;
} else if (!strcmp(option, "egressLatency")) {
r = get_ranged_int(value, &val, INT_MIN, INT_MAX);
if (r != PARSED_OK)
return r;
pod->tx_timestamp_offset = val;
} else if (!strcmp(option, "ingressLatency")) {
r = get_ranged_int(value, &val, INT_MIN, INT_MAX);
if (r != PARSED_OK)
return r;
pod->rx_timestamp_offset = val;
} else if (!strcmp(option, "fault_badpeernet_interval")) {
pod->flt_interval_pertype[FT_BAD_PEER_NETWORK].type = FTMO_LINEAR_SECONDS;
if (!strcasecmp("ASAP", value)) {
pod->flt_interval_pertype[FT_BAD_PEER_NETWORK].val = 0;
} else {
r = get_ranged_int(value, &val, INT32_MIN, INT32_MAX);
if (r != PARSED_OK)
return r;
pod->flt_interval_pertype[FT_BAD_PEER_NETWORK].val = val;
}
} else if (!strcmp(option, "fault_reset_interval")) {
pod->flt_interval_pertype[FT_UNSPECIFIED].type = FTMO_LOG2_SECONDS;
if (!strcasecmp("ASAP", value)) {
pod->flt_interval_pertype[FT_UNSPECIFIED].val = FRI_ASAP;
} else {
r = get_ranged_int(value, &val, INT8_MIN, INT8_MAX);
if (r != PARSED_OK)
return r;
pod->flt_interval_pertype[FT_UNSPECIFIED].val = val;
}
} else
return NOT_PARSED;
return PARSED_OK;
}
static enum parser_result parse_port_setting(struct config *cfg,
const char *option,
const char *value,
struct interface *iface)
{
enum parser_result r;
int val;
r = parse_pod_setting(option, value, &iface->pod);
if (r != NOT_PARSED)
return r;
if (!strcmp(option, "network_transport")) {
if (!strcasecmp("L2", value))
iface->transport = TRANS_IEEE_802_3;
else if (!strcasecmp("UDPv4", value))
iface->transport = TRANS_UDP_IPV4;
else if (!strcasecmp("UDPv6", value))
iface->transport = TRANS_UDP_IPV6;
else
return BAD_VALUE;
} else if (!strcmp(option, "delay_mechanism")) {
if (!strcasecmp("Auto", value))
iface->dm = DM_AUTO;
else if (!strcasecmp("E2E", value))
iface->dm = DM_E2E;
else if (!strcasecmp("P2P", value))
iface->dm = DM_P2P;
else
return BAD_VALUE;
} else if (!strcmp(option, "tsproc_mode")) {
if (!strcasecmp("filter", value))
iface->tsproc_mode = TSPROC_FILTER;
else if (!strcasecmp("raw", value))
iface->tsproc_mode = TSPROC_RAW;
else if (!strcasecmp("filter_weight", value))
iface->tsproc_mode = TSPROC_FILTER_WEIGHT;
else if (!strcasecmp("raw_weight", value))
iface->tsproc_mode = TSPROC_RAW_WEIGHT;
else
return BAD_VALUE;
} else if (!strcmp(option, "delay_filter")) {
if (!strcasecmp("moving_average", value))
iface->delay_filter = FILTER_MOVING_AVERAGE;
else if (!strcasecmp("moving_median", value))
iface->delay_filter = FILTER_MOVING_MEDIAN;
else
return BAD_VALUE;
} else if (!strcmp(option, "delay_filter_length")) {
r = get_ranged_int(value, &val, 1, INT_MAX);
if (r != PARSED_OK)
return r;
iface->delay_filter_length = val;
} else if (!strcmp(option, "boundary_clock_jbod")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
iface->boundary_clock_jbod = val;
} else
return parse_item(cfg, iface->name, option, value);
return PARSED_OK;
}
static int count_char(const char *str, char c)
{
int num = 0;
char s;
while ((s = *(str++))) {
if (s == c)
num++;
}
return num;
}
static enum parser_result parse_global_setting(const char *option,
const char *value,
struct config *cfg)
{
int i, val, cfg_ignore = cfg->cfg_ignore;
unsigned int uval;
unsigned char mac[MAC_LEN];
unsigned char oui[OUI_LEN];
struct defaultDS *dds = &cfg->dds.dds;
struct port_defaults *pod = &cfg->pod;
enum parser_result r;
r = parse_pod_setting(option, value, pod);
if (r != NOT_PARSED)
return r;
if (!strcmp(option, "twoStepFlag")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
if (val)
dds->flags |= DDS_TWO_STEP_FLAG;
else
dds->flags &= ~DDS_TWO_STEP_FLAG;
} else if (!strcmp(option, "slaveOnly")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
if (!(cfg_ignore & CFG_IGNORE_SLAVEONLY)) {
if (val)
dds->flags |= DDS_SLAVE_ONLY;
else
dds->flags &= ~DDS_SLAVE_ONLY;
}
} else if (!strcmp(option, "gmCapable")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
cfg->dds.grand_master_capable = val;
} else if (!strcmp(option, "priority1")) {
r = get_ranged_uint(value, &uval, 0, UINT8_MAX);
if (r != PARSED_OK)
return r;
dds->priority1 = uval;
} else if (!strcmp(option, "priority2")) {
r = get_ranged_uint(value, &uval, 0, UINT8_MAX);
if (r != PARSED_OK)
return r;
dds->priority2 = uval;
} else if (!strcmp(option, "domainNumber")) {
r = get_ranged_uint(value, &uval, 0, 127);
if (r != PARSED_OK)
return r;
dds->domainNumber = uval;
} else if (!strcmp(option, "clockClass")) {
r = get_ranged_uint(value, &uval, 0, UINT8_MAX);
if (r != PARSED_OK)
return r;
if (!(cfg_ignore & CFG_IGNORE_SLAVEONLY))
dds->clockQuality.clockClass = uval;
} else if (!strcmp(option, "clockAccuracy")) {
r = get_ranged_uint(value, &uval, 0, UINT8_MAX);
if (r != PARSED_OK)
return r;
dds->clockQuality.clockAccuracy = uval;
} else if (!strcmp(option, "offsetScaledLogVariance")) {
r = get_ranged_uint(value, &uval, 0, UINT16_MAX);
if (r != PARSED_OK)
return r;
dds->clockQuality.offsetScaledLogVariance = uval;
} else if (!strcmp(option, "free_running")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
cfg->dds.free_running = val;
} else if (!strcmp(option, "freq_est_interval")) {
r = get_ranged_int(value, &val, 0, INT_MAX);
if (r != PARSED_OK)
return r;
cfg->dds.freq_est_interval = val;
pod->freq_est_interval = val;
} else if (!strcmp(option, "sanity_freq_limit")) {
r = get_ranged_int(value, &val, 0, INT_MAX);
if (r != PARSED_OK)
return r;
cfg->dds.sanity_freq_limit = val;
} else if (!strcmp(option, "ptp_dst_mac")) {
if (MAC_LEN != sscanf(value, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
&mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]))
return BAD_VALUE;
for (i = 0; i < MAC_LEN; i++)
cfg->ptp_dst_mac[i] = mac[i];
} else if (!strcmp(option, "p2p_dst_mac")) {
if (MAC_LEN != sscanf(value, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
&mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]))
return BAD_VALUE;
for (i = 0; i < MAC_LEN; i++)
cfg->p2p_dst_mac[i] = mac[i];
} else if (!strcmp(option, "udp6_scope")) {
r = get_ranged_uint(value, &uval, 0x00, 0x0F);
if (r != PARSED_OK)
return r;
*cfg->udp6_scope = uval;
} else if (!strcmp(option, "uds_address")) {
if (strlen(value) > MAX_IFNAME_SIZE)
return OUT_OF_RANGE;
strncpy(cfg->uds_address, value, MAX_IFNAME_SIZE);
} else if (!strcmp(option, "time_stamping")) {
if (!(cfg_ignore & CFG_IGNORE_TIMESTAMPING)) {
if (0 == strcasecmp("hardware", value))
cfg->timestamping = TS_HARDWARE;
else if (0 == strcasecmp("software", value))
cfg->timestamping = TS_SOFTWARE;
else if (0 == strcasecmp("legacy", value))
cfg->timestamping = TS_LEGACY_HW;
else
return BAD_VALUE;
}
} else if (!strcmp(option, "delay_mechanism")) {
if (!(cfg_ignore & CFG_IGNORE_DM)) {
if (0 == strcasecmp("E2E", value))
cfg->dm = DM_E2E;
else if (0 == strcasecmp("P2P", value))
cfg->dm = DM_P2P;
else if (0 == strcasecmp("Auto", value))
cfg->dm = DM_AUTO;
else
return BAD_VALUE;
}
} else if (!strcmp(option, "network_transport")) {
if (!(cfg_ignore & CFG_IGNORE_TRANSPORT)) {
if (!strcasecmp("UDPv4", value))
cfg->transport = TRANS_UDP_IPV4;
else if (!strcasecmp("UDPv6", value))
cfg->transport = TRANS_UDP_IPV6;
else if (!strcasecmp("L2", value))
cfg->transport = TRANS_IEEE_802_3;
else
return BAD_VALUE;
}
} else if (!strcmp(option, "clock_servo")) {
if (!strcasecmp("pi", value))
cfg->clock_servo = CLOCK_SERVO_PI;
else if (!strcasecmp("linreg", value))
cfg->clock_servo = CLOCK_SERVO_LINREG;
else if (!strcasecmp("ntpshm", value))
cfg->clock_servo = CLOCK_SERVO_NTPSHM;
else if (!strcasecmp("nullf", value))
cfg->clock_servo = CLOCK_SERVO_NULLF;
else
return BAD_VALUE;
} else if (!strcmp(option, "productDescription")) {
if (count_char(value, ';') != 2)
return BAD_VALUE;
if (static_ptp_text_set(&cfg->dds.clock_desc.productDescription, value) != 0)
return BAD_VALUE;
} else if (!strcmp(option, "revisionData")) {
if (count_char(value, ';') != 2)
return BAD_VALUE;
if (static_ptp_text_set(&cfg->dds.clock_desc.revisionData, value) != 0)
return BAD_VALUE;
} else if (!strcmp(option, "userDescription")) {
if (static_ptp_text_set(&cfg->dds.clock_desc.userDescription, value) != 0)
return BAD_VALUE;
} else if (!strcmp(option, "manufacturerIdentity")) {
if (OUI_LEN != sscanf(value, "%hhx:%hhx:%hhx",
&oui[0], &oui[1], &oui[2]))
return BAD_VALUE;
for (i = 0; i < OUI_LEN; i++)
cfg->dds.clock_desc.manufacturerIdentity[i] = oui[i];
} else if (!strcmp(option, "summary_interval")) {
r = get_ranged_int(value, &val, INT_MIN, INT_MAX);
if (r != PARSED_OK)
return r;
cfg->dds.stats_interval = val;
} else if (!strcmp(option, "kernel_leap")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
cfg->dds.kernel_leap = val;
} else if (!strcmp(option, "timeSource")) {
r = get_ranged_int(value, &val, 0x10, 0xfe);
if (r != PARSED_OK)
return r;
cfg->dds.time_source = val;
} else if (!strcmp(option, "tsproc_mode")) {
if (!strcasecmp("filter", value))
cfg->dds.tsproc_mode = TSPROC_FILTER;
else if (!strcasecmp("raw", value))
cfg->dds.tsproc_mode = TSPROC_RAW;
else if (!strcasecmp("filter_weight", value))
cfg->dds.tsproc_mode = TSPROC_FILTER_WEIGHT;
else if (!strcasecmp("raw_weight", value))
cfg->dds.tsproc_mode = TSPROC_RAW_WEIGHT;
else
return BAD_VALUE;
} else if (!strcmp(option, "delay_filter")) {
if (!strcasecmp("moving_average", value))
cfg->dds.delay_filter = FILTER_MOVING_AVERAGE;
else if (!strcasecmp("moving_median", value))
cfg->dds.delay_filter = FILTER_MOVING_MEDIAN;
else
return BAD_VALUE;
} else if (!strcmp(option, "delay_filter_length")) {
r = get_ranged_int(value, &val, 1, INT_MAX);
if (r != PARSED_OK)
return r;
cfg->dds.delay_filter_length = val;
} else if (!strcmp(option, "boundary_clock_jbod")) {
r = get_ranged_int(value, &val, 0, 1);
if (r != PARSED_OK)
return r;
cfg->dds.boundary_clock_jbod = val;
} else
return parse_item(cfg, NULL, option, value);
return PARSED_OK;
}
static enum parser_result parse_setting_line(char *line,
const char **option,
const char **value)
{
*option = line;
while (!isspace(line[0])) {
if (line[0] == '\0')
return NOT_PARSED;
line++;
}
while (isspace(line[0])) {
line[0] = '\0';
line++;
}
*value = line;
return PARSED_OK;
}
static void check_deprecated_options(const char **option)
{
const char *new_option = NULL;
if (!strcmp(*option, "pi_offset_const")) {
new_option = "step_threshold";
} else if (!strcmp(*option, "pi_f_offset_const")) {
new_option = "first_step_threshold";
} else if (!strcmp(*option, "pi_max_frequency")) {
new_option = "max_frequency";
}
if (new_option) {
fprintf(stderr, "option %s is deprecated, please use %s instead\n",
*option, new_option);
*option = new_option;
}
}
int config_read(char *name, struct config *cfg)
{
enum config_section current_section = UNKNOWN_SECTION;
enum parser_result parser_res;
FILE *fp;
char buf[1024], *line, *c;
const char *option, *value;
struct interface *current_port = NULL;
int line_num;
fp = 0 == strncmp(name, "-", 2) ? stdin : fopen(name, "r");
if (!fp) {
fprintf(stderr, "failed to open configuration file %s: %m\n", name);
return -1;
}
for (line_num = 1; fgets(buf, sizeof(buf), fp); line_num++) {
c = buf;
/* skip whitespace characters */
while (isspace(*c))
c++;
/* ignore empty lines and comments */
if (*c == '#' || *c == '\n' || *c == '\0')
continue;
line = c;
/* remove trailing whitespace characters and \n */
c += strlen(line) - 1;
while (c > line && (*c == '\n' || isspace(*c)))
*c-- = '\0';
if (parse_section_line(line, &current_section) == PARSED_OK) {
if (current_section == PORT_SECTION) {
char port[17];
if (1 != sscanf(line, " %16s", port)) {
fprintf(stderr, "could not parse port name on line %d\n",
line_num);
goto parse_error;
}
current_port = config_create_interface(port, cfg);
if (!current_port)
goto parse_error;
config_init_interface(current_port, cfg);
}
continue;
}
switch (current_section) {
case GLOBAL_SECTION:
case PORT_SECTION:
if (parse_setting_line(line, &option, &value)) {
fprintf(stderr, "could not parse line %d in %s section\n",
line_num,
current_section == GLOBAL_SECTION ?
"global" : current_port->name);
goto parse_error;
}
check_deprecated_options(&option);
if (current_section == GLOBAL_SECTION)
parser_res = parse_global_setting(option, value, cfg);
else
parser_res = parse_port_setting(cfg, option, value, current_port);
switch (parser_res) {
case PARSED_OK:
break;
case NOT_PARSED:
fprintf(stderr, "unknown option %s at line %d in %s section\n",
option, line_num,
current_section == GLOBAL_SECTION ?
"global" : current_port->name);
goto parse_error;
case BAD_VALUE:
fprintf(stderr, "%s is a bad value for option %s at line %d\n",
value, option, line_num);
goto parse_error;
case MALFORMED:
fprintf(stderr, "%s is a malformed value for option %s at line %d\n",
value, option, line_num);
goto parse_error;
case OUT_OF_RANGE:
fprintf(stderr, "%s is an out of range value for option %s at line %d\n",
value, option, line_num);
goto parse_error;
}
break;
case UNKNOWN_SECTION:
fprintf(stderr, "line %d is not in a section\n", line_num);
goto parse_error;
default:
continue;
}
}
fclose(fp);
return 0;
parse_error:
fprintf(stderr, "failed to parse configuration file %s\n", name);
fclose(fp);
return -2;
}
struct interface *config_create_interface(char *name, struct config *cfg)
{
struct interface *iface;
/* only create each interface once (by name) */
STAILQ_FOREACH(iface, &cfg->interfaces, list) {
if (0 == strncmp(name, iface->name, MAX_IFNAME_SIZE))
return iface;
}
iface = calloc(1, sizeof(struct interface));
if (!iface) {
fprintf(stderr, "cannot allocate memory for a port\n");
return NULL;
}
strncpy(iface->name, name, MAX_IFNAME_SIZE);
STAILQ_INSERT_TAIL(&cfg->interfaces, iface, list);
return iface;
}
void config_init_interface(struct interface *iface, struct config *cfg)
{
iface->dm = cfg->dm;
iface->transport = cfg->transport;
memcpy(&iface->pod, &cfg->pod, sizeof(cfg->pod));
sk_get_ts_info(iface->name, &iface->ts_info);
iface->delay_filter = cfg->dds.delay_filter;
iface->delay_filter_length = cfg->dds.delay_filter_length;
iface->boundary_clock_jbod = cfg->dds.boundary_clock_jbod;
}
int config_init(struct config *cfg)
{
char buf[CONFIG_LABEL_SIZE + 8];
struct config_item *ci;
int i;
cfg->htab = hash_create();
if (!cfg->htab) {
return -1;
}
/* Populate the hash table with global defaults. */
for (i = 0; i < N_CONFIG_ITEMS; i++) {
ci = &config_tab[i];
ci->flags |= CFG_ITEM_STATIC;
snprintf(buf, sizeof(buf), "global.%s", ci->label);
if (hash_insert(cfg->htab, buf, ci)) {
fprintf(stderr, "duplicate item %s\n", ci->label);
goto fail;
}
}
/* Perform a Built In Self Test.*/
for (i = 0; i < N_CONFIG_ITEMS; i++) {
ci = &config_tab[i];
ci = config_global_item(cfg, ci->label);
if (ci != &config_tab[i]) {
fprintf(stderr, "config BIST failed at %s\n",
config_tab[i].label);
goto fail;
}
}
return 0;
fail:
hash_destroy(cfg->htab, NULL);
return -1;
}
void config_destroy(struct config *cfg)
{
struct interface *iface;
while ((iface = STAILQ_FIRST(&cfg->interfaces))) {
STAILQ_REMOVE_HEAD(&cfg->interfaces, list);
free(iface);
}
hash_destroy(cfg->htab, config_item_free);
}
double config_get_double(struct config *cfg, const char *section,
const char *option)
{
struct config_item *ci = config_find_item(cfg, section, option);
if (!ci || ci->type != CFG_TYPE_DOUBLE) {
pr_err("bug: config option %s missing or invalid!", option);
exit(-1);
}
pr_debug("config item %s.%s is %f", section, option, ci->val.d);
return ci->val.d;
}
int config_get_int(struct config *cfg, const char *section, const char *option)
{
struct config_item *ci = config_find_item(cfg, section, option);
if (!ci) {
pr_err("bug: config option %s missing!", option);
exit(-1);
}
switch (ci->type) {
case CFG_TYPE_DOUBLE:
pr_err("bug: config option %s type mismatch!", option);
exit(-1);
case CFG_TYPE_INT:
break;
}
pr_debug("config item %s.%s is %d", section, option, ci->val.i);
return ci->val.i;
}
int config_set_double(struct config *cfg, const char *option, double val)
{
struct config_item *ci = config_find_item(cfg, NULL, option);
if (!ci || ci->type != CFG_TYPE_DOUBLE) {
pr_err("bug: config option %s missing or invalid!", option);
return -1;
}
ci->flags |= CFG_ITEM_LOCKED;
ci->val.d = val;
pr_debug("locked item global.%s as %f", option, ci->val.d);
return 0;
}
int config_set_section_int(struct config *cfg, const char *section,
const char *option, int val)
{
struct config_item *cgi, *dst;
cgi = config_find_item(cfg, NULL, option);
if (!cgi) {
pr_err("bug: config option %s missing!", option);
return -1;
}
switch (cgi->type) {
case CFG_TYPE_DOUBLE:
pr_err("bug: config option %s type mismatch!", option);
return -1;
case CFG_TYPE_INT:
break;
}
if (!section) {
cgi->flags |= CFG_ITEM_LOCKED;
cgi->val.i = val;
pr_debug("locked item global.%s as %d", option, cgi->val.i);
return 0;
}
/* Create or update this port specific item. */
dst = config_section_item(cfg, section, option);
if (!dst) {
dst = config_item_alloc(cfg, section, option, cgi->type);
if (!dst) {
return -1;
}
}
dst->val.i = val;
pr_debug("section item %s.%s now %d", section, option, dst->val.i);
return 0;
}
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