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config.c
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/**
* @file config.c
* @note Copyright (C) 2011 Richard Cochran <[email protected]>
*
* 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 "as_capable.h"
#include "bmc.h"
#include "clock.h"
#include "config.h"
#include "ether.h"
#include "hash.h"
#include "print.h"
#include "util.h"
enum config_section {
GLOBAL_SECTION,
UC_MTAB_SECTION,
PORT_SECTION,
UNKNOWN_SECTION,
};
enum config_type {
CFG_TYPE_INT,
CFG_TYPE_DOUBLE,
CFG_TYPE_ENUM,
CFG_TYPE_STRING,
};
struct config_enum {
const char *label;
int value;
};
typedef union {
int i;
double d;
char *s;
} 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 */
#define CFG_ITEM_DYNSTR (1 << 4) /* string value dynamically allocated */
struct config_item {
char label[CONFIG_LABEL_SIZE];
enum config_type type;
struct config_enum *tab;
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_ENUM(_label, _port, _default, _table) { \
.label = _label, \
.type = CFG_TYPE_ENUM, \
.flags = _port ? CFG_ITEM_PORT : 0, \
.tab = _table, \
.val.i = _default, \
}
#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 CONFIG_ITEM_STRING(_label, _port, _default) { \
.label = _label, \
.type = CFG_TYPE_STRING, \
.flags = _port ? CFG_ITEM_PORT : 0, \
.val.s = _default, \
}
#define GLOB_ITEM_DBL(label, _default, min, max) \
CONFIG_ITEM_DBL(label, 0, _default, min, max)
#define GLOB_ITEM_ENU(label, _default, table) \
CONFIG_ITEM_ENUM(label, 0, _default, table)
#define GLOB_ITEM_INT(label, _default, min, max) \
CONFIG_ITEM_INT(label, 0, _default, min, max)
#define GLOB_ITEM_STR(label, _default) \
CONFIG_ITEM_STRING(label, 0, _default)
#define PORT_ITEM_DBL(label, _default, min, max) \
CONFIG_ITEM_DBL(label, 1, _default, min, max)
#define PORT_ITEM_ENU(label, _default, table) \
CONFIG_ITEM_ENUM(label, 1, _default, table)
#define PORT_ITEM_INT(label, _default, min, max) \
CONFIG_ITEM_INT(label, 1, _default, min, max)
#define PORT_ITEM_STR(label, _default) \
CONFIG_ITEM_STRING(label, 1, _default)
static struct config_enum clock_servo_enu[] = {
{ "pi", CLOCK_SERVO_PI },
{ "linreg", CLOCK_SERVO_LINREG },
{ "ntpshm", CLOCK_SERVO_NTPSHM },
{ "nullf", CLOCK_SERVO_NULLF },
{ NULL, 0 },
};
static struct config_enum clock_type_enu[] = {
{ "OC", CLOCK_TYPE_ORDINARY },
{ "BC", CLOCK_TYPE_BOUNDARY },
{ "P2P_TC", CLOCK_TYPE_P2P },
{ "E2E_TC", CLOCK_TYPE_E2E },
{ NULL, 0 },
};
static struct config_enum dataset_comp_enu[] = {
{ "ieee1588", DS_CMP_IEEE1588 },
{ "G.8275.x", DS_CMP_G8275 },
{ NULL, 0 },
};
static struct config_enum delay_filter_enu[] = {
{ "moving_average", FILTER_MOVING_AVERAGE },
{ "moving_median", FILTER_MOVING_MEDIAN },
{ NULL, 0 },
};
static struct config_enum delay_mech_enu[] = {
{ "Auto", DM_AUTO },
{ "E2E", DM_E2E },
{ "P2P", DM_P2P },
{ NULL, 0 },
};
static struct config_enum hwts_filter_enu[] = {
{ "normal", HWTS_FILTER_NORMAL },
{ "check", HWTS_FILTER_CHECK },
{ "full", HWTS_FILTER_FULL },
{ NULL, 0 },
};
static struct config_enum nw_trans_enu[] = {
{ "L2", TRANS_IEEE_802_3 },
{ "UDPv4", TRANS_UDP_IPV4 },
{ "UDPv6", TRANS_UDP_IPV6 },
{ NULL, 0 },
};
static struct config_enum timestamping_enu[] = {
{ "hardware", TS_HARDWARE },
{ "software", TS_SOFTWARE },
{ "legacy", TS_LEGACY_HW },
{ "onestep", TS_ONESTEP },
{ "p2p1step", TS_P2P1STEP },
{ NULL, 0 },
};
static struct config_enum tsproc_enu[] = {
{ "filter", TSPROC_FILTER },
{ "raw", TSPROC_RAW },
{ "filter_weight", TSPROC_FILTER_WEIGHT },
{ "raw_weight", TSPROC_RAW_WEIGHT },
{ NULL, 0 },
};
static struct config_enum as_capable_enu[] = {
{ "true", AS_CAPABLE_TRUE },
{ "auto", AS_CAPABLE_AUTO },
{ NULL, 0 },
};
static struct config_enum bmca_enu[] = {
{ "ptp", BMCA_PTP },
{ "noop", BMCA_NOOP },
{ NULL, 0 },
};
struct config_item config_tab[] = {
PORT_ITEM_INT("announceReceiptTimeout", 3, 2, UINT8_MAX),
PORT_ITEM_ENU("asCapable", AS_CAPABLE_AUTO, as_capable_enu),
GLOB_ITEM_INT("assume_two_step", 0, 0, 1),
PORT_ITEM_INT("boundary_clock_jbod", 0, 0, 1),
PORT_ITEM_ENU("BMCA", BMCA_PTP, bmca_enu),
GLOB_ITEM_INT("check_fup_sync", 0, 0, 1),
GLOB_ITEM_INT("clockAccuracy", 0xfe, 0, UINT8_MAX),
GLOB_ITEM_INT("clockClass", 248, 0, UINT8_MAX),
GLOB_ITEM_STR("clockIdentity", "000000.0000.000000"),
GLOB_ITEM_ENU("clock_servo", CLOCK_SERVO_PI, clock_servo_enu),
GLOB_ITEM_ENU("clock_type", CLOCK_TYPE_ORDINARY, clock_type_enu),
GLOB_ITEM_ENU("dataset_comparison", DS_CMP_IEEE1588, dataset_comp_enu),
PORT_ITEM_INT("delayAsymmetry", 0, INT_MIN, INT_MAX),
PORT_ITEM_ENU("delay_filter", FILTER_MOVING_MEDIAN, delay_filter_enu),
PORT_ITEM_INT("delay_filter_length", 10, 1, INT_MAX),
PORT_ITEM_ENU("delay_mechanism", DM_E2E, delay_mech_enu),
GLOB_ITEM_INT("dscp_event", 0, 0, 63),
GLOB_ITEM_INT("dscp_general", 0, 0, 63),
GLOB_ITEM_INT("domainNumber", 0, 0, 127),
PORT_ITEM_INT("egressLatency", 0, INT_MIN, INT_MAX),
PORT_ITEM_INT("fault_badpeernet_interval", 16, INT32_MIN, INT32_MAX),
PORT_ITEM_INT("fault_reset_interval", 4, INT8_MIN, INT8_MAX),
GLOB_ITEM_DBL("first_step_threshold", 0.00002, 0.0, DBL_MAX),
PORT_ITEM_INT("follow_up_info", 0, 0, 1),
GLOB_ITEM_INT("free_running", 0, 0, 1),
PORT_ITEM_INT("freq_est_interval", 1, 0, INT_MAX),
GLOB_ITEM_INT("G.8275.defaultDS.localPriority", 128, 1, UINT8_MAX),
PORT_ITEM_INT("G.8275.portDS.localPriority", 128, 1, UINT8_MAX),
GLOB_ITEM_INT("gmCapable", 1, 0, 1),
GLOB_ITEM_ENU("hwts_filter", HWTS_FILTER_NORMAL, hwts_filter_enu),
PORT_ITEM_INT("hybrid_e2e", 0, 0, 1),
PORT_ITEM_INT("ignore_source_id", 0, 0, 1),
PORT_ITEM_INT("ignore_transport_specific", 0, 0, 1),
PORT_ITEM_INT("ingressLatency", 0, INT_MIN, INT_MAX),
PORT_ITEM_INT("inhibit_announce", 0, 0, 1),
PORT_ITEM_INT("inhibit_multicast_service", 0, 0, 1),
GLOB_ITEM_INT("initial_delay", 0, 0, INT_MAX),
GLOB_ITEM_INT("kernel_leap", 1, 0, 1),
PORT_ITEM_INT("logAnnounceInterval", 1, INT8_MIN, INT8_MAX),
PORT_ITEM_INT("logMinDelayReqInterval", 0, INT8_MIN, INT8_MAX),
PORT_ITEM_INT("logMinPdelayReqInterval", 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),
PORT_ITEM_INT("masterOnly", 0, 0, 1),
GLOB_ITEM_INT("maxStepsRemoved", 255, 2, UINT8_MAX),
GLOB_ITEM_STR("message_tag", NULL),
GLOB_ITEM_STR("manufacturerIdentity", "00:00:00"),
GLOB_ITEM_INT("max_frequency", 900000000, 0, INT_MAX),
PORT_ITEM_INT("min_neighbor_prop_delay", -20000000, INT_MIN, -1),
PORT_ITEM_INT("neighborPropDelayThresh", 20000000, 0, INT_MAX),
PORT_ITEM_INT("net_sync_monitor", 0, 0, 1),
PORT_ITEM_ENU("network_transport", TRANS_UDP_IPV4, nw_trans_enu),
GLOB_ITEM_INT("ntpshm_segment", 0, INT_MIN, INT_MAX),
GLOB_ITEM_INT("offsetScaledLogVariance", 0xffff, 0, UINT16_MAX),
PORT_ITEM_INT("path_trace_enabled", 0, 0, 1),
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_INT("priority1", 128, 0, UINT8_MAX),
GLOB_ITEM_INT("priority2", 128, 0, UINT8_MAX),
GLOB_ITEM_STR("productDescription", ";;"),
PORT_ITEM_STR("ptp_dst_mac", "01:1B:19:00:00:00"),
PORT_ITEM_STR("p2p_dst_mac", "01:80:C2:00:00:0E"),
GLOB_ITEM_STR("revisionData", ";;"),
GLOB_ITEM_INT("sanity_freq_limit", 200000000, 0, INT_MAX),
GLOB_ITEM_INT("slaveOnly", 0, 0, 1),
GLOB_ITEM_DBL("step_threshold", 0.0, 0.0, DBL_MAX),
GLOB_ITEM_INT("summary_interval", 0, INT_MIN, INT_MAX),
PORT_ITEM_INT("syncReceiptTimeout", 0, 0, UINT8_MAX),
GLOB_ITEM_INT("tc_spanning_tree", 0, 0, 1),
GLOB_ITEM_INT("timeSource", INTERNAL_OSCILLATOR, 0x10, 0xfe),
GLOB_ITEM_ENU("time_stamping", TS_HARDWARE, timestamping_enu),
PORT_ITEM_INT("transportSpecific", 0, 0, 0x0F),
PORT_ITEM_ENU("tsproc_mode", TSPROC_FILTER, tsproc_enu),
GLOB_ITEM_INT("twoStepFlag", 1, 0, 1),
GLOB_ITEM_INT("tx_timestamp_timeout", 1, 1, INT_MAX),
PORT_ITEM_INT("udp_ttl", 1, 1, 255),
PORT_ITEM_INT("udp6_scope", 0x0E, 0x00, 0x0F),
GLOB_ITEM_STR("uds_address", "/var/run/ptp4l"),
PORT_ITEM_INT("unicast_listen", 0, 0, 1),
PORT_ITEM_INT("unicast_master_table", 0, 0, INT_MAX),
PORT_ITEM_INT("unicast_req_duration", 3600, 10, INT_MAX),
GLOB_ITEM_INT("use_syslog", 1, 0, 1),
GLOB_ITEM_STR("userDescription", ""),
GLOB_ITEM_INT("utc_offset", CURRENT_UTC_OFFSET, 0, INT_MAX),
GLOB_ITEM_INT("verbose", 0, 0, 1),
};
static struct unicast_master_table *current_uc_mtab;
static enum parser_result
parse_fault_interval(struct config *cfg, const char *section,
const char *option, const char *value);
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->type == CFG_TYPE_STRING && ci->flags & CFG_ITEM_DYNSTR)
free(ci->val.s);
if (ci->flags & CFG_ITEM_STATIC)
return;
free(ci);
}
static int config_switch_unicast_mtab(struct config *cfg, int idx, int line_num)
{
struct unicast_master_table *table;
if (idx < 1) {
fprintf(stderr, "line %d: table_id %d is out of range. "
"Must be in the range %d to %d\n",
line_num, idx, 1, INT_MAX);
return -1;
}
STAILQ_FOREACH(table, &cfg->unicast_master_tables, list) {
if (table->table_index == idx) {
fprintf(stderr, "line %d: table_id %d already taken\n",
line_num, idx);
return -1;
}
}
table = calloc(1, sizeof(*table));
if (!table) {
fprintf(stderr, "low memory\n");
return -1;
}
STAILQ_INIT(&table->addrs);
table->table_index = idx;
memset(&table->peer_addr.portIdentity, 0xff,
sizeof(table->peer_addr.portIdentity));
STAILQ_INSERT_TAIL(&cfg->unicast_master_tables, table, list);
current_uc_mtab = table;
return 0;
}
static int config_unicast_mtab_address(enum transport_type type, char *address,
int line_num)
{
struct unicast_master_address *item;
if (!current_uc_mtab) {
fprintf(stderr, "line %d: missing table_id\n", line_num);
return -1;
}
item = calloc(1, sizeof(*item));
if (!item) {
fprintf(stderr, "low memory\n");
return -1;
}
if (str2addr(type, address, &item->address)) {
fprintf(stderr, "line %d: bad address\n", line_num);
free(item);
return -1;
}
memset(&item->portIdentity, 0xff, sizeof(item->portIdentity));
item->type = type;
STAILQ_INSERT_TAIL(¤t_uc_mtab->addrs, item, list);
current_uc_mtab->count++;
return 0;
}
static int config_unicast_mtab_peer(char *address, int line_num)
{
if (!current_uc_mtab) {
fprintf(stderr, "line %d: missing table_id\n", line_num);
return -1;
}
if (current_uc_mtab->peer_name) {
free(current_uc_mtab->peer_name);
}
current_uc_mtab->peer_name = strdup(address);
if (!current_uc_mtab->peer_name) {
fprintf(stderr, "low memory\n");
return -1;
}
return 0;
}
static int config_unicast_mtab_query_interval(int lqi, int line_num)
{
if (!current_uc_mtab) {
fprintf(stderr, "line %d: missing table_id\n", line_num);
return -1;
}
if (lqi < INT8_MIN || lqi > INT8_MAX) {
fprintf(stderr, "line %d: logQueryInterval %d out of range\n",
line_num, lqi);
return -1;
}
current_uc_mtab->logQueryInterval = lqi;
return 0;
}
static enum parser_result parse_section_line(char *s, enum config_section *section)
{
if (!strcasecmp(s, "[global]")) {
*section = GLOBAL_SECTION;
} else if (!strcasecmp(s, "[unicast_master_table]")) {
*section = UC_MTAB_SECTION;
current_uc_mtab = NULL;
} 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,
int commandline,
const char *section,
const char *option,
const char *value)
{
enum parser_result r;
struct config_item *cgi, *dst;
struct config_enum *cte;
double df;
int val;
r = parse_fault_interval(cfg, section, option, value);
if (r != NOT_PARSED)
return r;
r = BAD_VALUE;
/* 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;
case CFG_TYPE_ENUM:
for (cte = cgi->tab; cte->label; cte++) {
if (!strcasecmp(cte->label, value)) {
val = cte->value;
r = PARSED_OK;
break;
}
}
break;
case CFG_TYPE_STRING:
r = PARSED_OK;
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 (!commandline && 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:
case CFG_TYPE_ENUM:
dst->val.i = val;
break;
case CFG_TYPE_DOUBLE:
dst->val.d = df;
break;
case CFG_TYPE_STRING:
if (dst->flags & CFG_ITEM_DYNSTR) {
free(dst->val.s);
}
dst->val.s = strdup(value);
if (!dst->val.s) {
pr_err("low memory");
return NOT_PARSED;
}
dst->flags |= CFG_ITEM_DYNSTR;
break;
}
if (commandline) {
dst->flags |= CFG_ITEM_LOCKED;
}
return PARSED_OK;
}
static enum parser_result parse_fault_interval(struct config *cfg,
const char *section,
const char *option,
const char *value)
{
int i, val;
const char *str, *fault_options[2] = {
"fault_badpeernet_interval",
"fault_reset_interval",
};
int fault_values[2] = {
0, FRI_ASAP,
};
if (strcasecmp("ASAP", value)) {
return NOT_PARSED;
}
for (i = 0; i < 2; i++) {
str = fault_options[i];
val = fault_values[i];
if (!strcmp(option, str)) {
if (config_set_section_int(cfg, section, str, val)) {
pr_err("bug: failed to set option %s!", option);
exit(-1);
}
return PARSED_OK;
}
}
return NOT_PARSED;
}
static int parse_unicast_mtab_line(struct config *cfg, char *line, int line_num)
{
char address[64 + 1] = {0}, transport[16 + 1] = {0};
enum transport_type type = TRANS_UDS;
struct config_enum *cte;
int cnt, lqi, table_id;
cnt = sscanf(line, " table_id %d", &table_id);
if (cnt == 1) {
return config_switch_unicast_mtab(cfg, table_id, line_num);
}
cnt = sscanf(line, " logQueryInterval %d", &lqi);
if (cnt == 1) {
return config_unicast_mtab_query_interval(lqi, line_num);
}
cnt = sscanf(line, " peer_address %64s", address);
if (cnt == 1) {
return config_unicast_mtab_peer(address, line_num);
}
cnt = sscanf(line, " %16s %64s", transport, address);
if (cnt != 2) {
fprintf(stderr, "bad master table at line %d\n", line_num);
return -1;
}
for (cte = nw_trans_enu; cte->label; cte++) {
if (!strcasecmp(cte->label, transport)) {
type = cte->value;
break;
}
}
return config_unicast_mtab_address(type, address, line_num);
}
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;
}
}
static struct option *config_alloc_longopts(void)
{
struct config_item *ci;
struct option *opts;
int i;
opts = calloc(1, (1 + N_CONFIG_ITEMS) * sizeof(*opts));
if (!opts) {
return NULL;
}
for (i = 0; i < N_CONFIG_ITEMS; i++) {
ci = &config_tab[i];
opts[i].name = ci->label;
opts[i].has_arg = required_argument;
}
return opts;
}
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, ¤t_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;
}
continue;
}
if (current_section == UC_MTAB_SECTION) {
if (parse_unicast_mtab_line(cfg, line, line_num)) {
goto parse_error;
}
continue;
}
if (current_section == UNKNOWN_SECTION) {
fprintf(stderr, "line %d is not in a section\n", line_num);
goto parse_error;
}
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);
parser_res = parse_item(cfg, 0, current_section == GLOBAL_SECTION ?
NULL : current_port->name, option, value);
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;
}
}
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);
cfg->n_interfaces++;
return iface;
}
struct config *config_create(void)
{
char buf[CONFIG_LABEL_SIZE + 8];
struct config_item *ci;
struct config *cfg;
int i;
cfg = calloc(1, sizeof(*cfg));
if (!cfg) {
return NULL;
}
STAILQ_INIT(&cfg->interfaces);
STAILQ_INIT(&cfg->unicast_master_tables);
cfg->opts = config_alloc_longopts();
if (!cfg->opts) {
free(cfg);
return NULL;
}
cfg->htab = hash_create();
if (!cfg->htab) {
free(cfg->opts);
free(cfg);
return NULL;
}
/* 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 cfg;
fail:
hash_destroy(cfg->htab, NULL);
free(cfg->opts);
free(cfg);
return NULL;
}
void config_destroy(struct config *cfg)
{
struct unicast_master_address *address;
struct unicast_master_table *table;
struct interface *iface;
while ((iface = STAILQ_FIRST(&cfg->interfaces))) {
STAILQ_REMOVE_HEAD(&cfg->interfaces, list);
free(iface);
}
while ((table = STAILQ_FIRST(&cfg->unicast_master_tables))) {
while ((address = STAILQ_FIRST(&table->addrs))) {
STAILQ_REMOVE_HEAD(&table->addrs, list);
free(address);
}
if (table->peer_name) {
free(table->peer_name);
}
STAILQ_REMOVE_HEAD(&cfg->unicast_master_tables, list);
free(table);
}
hash_destroy(cfg->htab, config_item_free);
free(cfg->opts);
free(cfg);
}
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:
case CFG_TYPE_STRING:
pr_err("bug: config option %s type mismatch!", option);
exit(-1);
case CFG_TYPE_INT:
case CFG_TYPE_ENUM:
break;
}
pr_debug("config item %s.%s is %d", section, option, ci->val.i);
return ci->val.i;
}
char *config_get_string(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_STRING) {
pr_err("bug: config option %s missing or invalid!", option);
exit(-1);
}
pr_debug("config item %s.%s is '%s'", section, option, ci->val.s);
return ci->val.s;
}
int config_harmonize_onestep(struct config *cfg)
{
enum timestamp_type tstype = config_get_int(cfg, NULL, "time_stamping");
int two_step_flag = config_get_int(cfg, NULL, "twoStepFlag");
switch (tstype) {
case TS_SOFTWARE:
case TS_LEGACY_HW:
if (!two_step_flag) {
pr_err("one step is only possible "
"with hardware time stamping");
return -1;
}
break;
case TS_HARDWARE:
if (!two_step_flag) {
pr_debug("upgrading to one step time stamping "
"in order to match the twoStepFlag");
if (config_set_int(cfg, "time_stamping", TS_ONESTEP)) {
return -1;
}
}
break;
case TS_ONESTEP:
case TS_P2P1STEP:
if (two_step_flag) {
pr_debug("one step mode implies twoStepFlag=0, "
"clearing twoStepFlag to match");
if (config_set_int(cfg, "twoStepFlag", 0)) {
return -1;
}
}
break;
}