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#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "config.h"
#include "ini.h"
struct gmnisrv_host *
gmnisrv_config_get_host(struct gmnisrv_config *conf, const char *hostname)
{
struct gmnisrv_host *host = conf->hosts;
while (host) {
if (strcmp(host->hostname, hostname) == 0) {
return host;
}
host = host->next;
}
return NULL;
}
static int
parse_listen(struct gmnisrv_config *conf, const char *value)
{
char listen[4096];
assert(strlen(value) < sizeof(listen) - 1);
strcpy(listen, value);
char *tok = strtok(listen, " ");
while (tok) {
char *port = tok;
struct gmnisrv_bind *bind =
calloc(1, sizeof(struct gmnisrv_bind));
assert(bind);
bind->port = 1965;
bind->name = strdup(tok);
if (tok[0] == '[') {
bind->family = AF_INET6;
char *e = strchr(tok, ']');
if (!e) {
fprintf(stderr,
"Error: invalid address specification %s\n",
tok);
return 0;
}
*e = '\0';
port = e + 1;
++tok;
} else {
bind->family = AF_INET;
}
port = strchr(port, ':');
if (port) {
*port = '\0';
++port;
char *endptr;
bind->port = strtoul(port, &endptr, 10);
if (*endptr) {
fprintf(stderr, "Error: invalid port %s\n", port);
return 0;
}
if (bind->port == 0 || bind->port > 65535) {
fprintf(stderr, "Error: invalid port %s\n", port);
return 0;
}
}
int r = inet_pton(bind->family, tok, bind->addr);
if (r != 1) {
fprintf(stderr,
"Error: invalid address specification %s\n",
tok);
return 0;
}
bind->next = conf->binds;
conf->binds = bind;
tok = strtok(NULL, " ");
}
return 1;
}
static int
conf_ini_handler(void *user, const char *section,
const char *name, const char *value)
{
struct gmnisrv_config *conf = (struct gmnisrv_config *)user;
struct {
char *section;
char *name;
char **value;
} strvars[] = {
{ ":tls", "store", &conf->tls.store },
{ ":tls", "organization", &conf->tls.organization },
{ ":tls", "email", &conf->tls.email },
};
struct {
char *section;
char *name;
int (*fn)(struct gmnisrv_config *conf, const char *value);
} fnvars[] = {
{ "", "listen", &parse_listen, }
};
for (size_t i = 0; i < sizeof(strvars) / sizeof(strvars[0]); ++i) {
if (strcmp(strvars[i].section, section) != 0) {
continue;
}
if (strcmp(strvars[i].name, name) != 0) {
continue;
}
*strvars[i].value = strdup(value);
return 1;
}
for (size_t i = 0; i < sizeof(fnvars) / sizeof(fnvars[0]); ++i) {
if (strcmp(fnvars[i].section, section) != 0) {
continue;
}
if (strcmp(fnvars[i].name, name) != 0) {
continue;
}
return fnvars[i].fn(conf, value);
}
if (section[0] == '\0' || section[0] == ':') {
fprintf(stderr, "Unknown config option [%s]%s\n", section, name);
return 0;
}
struct gmnisrv_host *host = gmnisrv_config_get_host(conf, section);
if (!host) {
host = calloc(1, sizeof(struct gmnisrv_host));
assert(host);
host->hostname = strdup(section);
host->next = conf->hosts;
conf->hosts = host;
}
struct {
char *name;
char **value;
} host_strvars[] = {
{ "root", &host->root },
{ "index", &host->index },
};
struct {
char *name;
bool *value;
} host_bvars[] = {
{ "autoindex", &host->autoindex },
};
for (size_t i = 0; i < sizeof(host_strvars) / sizeof(host_strvars[0]); ++i) {
if (strcmp(host_strvars[i].name, name) != 0) {
continue;
}
*host_strvars[i].value = strdup(value);
return 1;
}
for (size_t i = 0; i < sizeof(host_bvars) / sizeof(host_bvars[0]); ++i) {
if (strcmp(host_bvars[i].name, name) != 0) {
continue;
}
*host_bvars[i].value =
strcasecmp(value, "yes") == 0 ||
strcasecmp(value, "true") == 0 ||
strcasecmp(value, "on") == 0;
return 1;
}
fprintf(stderr, "Unknown config option [%s]%s\n", section, name);
return 0;
}
static int
validate_config(struct gmnisrv_config *conf)
{
if (!conf->binds) {
fprintf(stderr, "Error: config missing listen directive\n");
return 1;
}
if (!conf->hosts) {
fprintf(stderr, "Error: config defines no hosts\n");
return 1;
}
if (!conf->tls.store) {
fprintf(stderr, "Error: config defines no certificate store\n");
return 1;
}
return 0;
}
int
load_config(struct gmnisrv_config *conf, const char *path)
{
FILE *f = fopen(path, "r");
if (!f) {
fprintf(stderr, "Error opening %s: %s\n",
path, strerror(errno));
return 1;
}
int n = ini_parse_file(f, conf_ini_handler, conf);
fclose(f);
if (n != 0) {
fprintf(stderr, "at %s:%d\n", path, n);
return 1;
}
return validate_config(conf);
}
void
config_finish(struct gmnisrv_config *conf)
{
free(conf->tls.store);
free(conf->tls.organization);
free(conf->tls.email);
struct gmnisrv_bind *bind = conf->binds;
while (bind) {
struct gmnisrv_bind *next = bind->next;
free(bind->name);
free(bind);
bind = next;
}
struct gmnisrv_host *host = conf->hosts;
while (host) {
struct gmnisrv_host *next = host->next;
free(host->hostname);
free(host->root);
free(host->index);
free(host);
host = next;
}
}
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