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char *string;
struct config_entry *next;
struct packet_info ip;
struct cidr cidr;
};
struct config_entry *blacklistbl = NULL;
struct config_entry *whitelistbl = NULL;
struct config_entry *blacklist = NULL;
struct config_entry *whitelist = NULL;
struct bl_context {
int permissions;
const char *current_end_token;
pool_t *pool;
};
enum permissions {
O_ROOT = 1,
O_HOSTSECTION = 2,
O_LAST = 4
};
static DOTCONF_CB(host_section_open);
static DOTCONF_CB(common_section_close);
static DOTCONF_CB(common_option);
static DOTCONF_CB(toggle_option);
static DOTCONF_CB(facility_option);
static const char *end_host = "</host>";
static struct config conf = { 0, 0, 1, 0, LOG_DAEMON, 0 };
static struct config conf = { 0, 0, 1, 0, LOG_DAEMON, 0, 0, 0, NULL, NULL, NULL, NULL };
struct pbl_stat_info {
uint32_t cacheaccept;
uint32_t cachereject;
uint32_t whitelistblhits;
uint32_t blacklistblhits;
uint32_t whitelisthits;
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static void get_ip_string(const struct packet_info *ip);
static void pbl_set_verdict(struct PBL_HANDLE *h, PBL_ID_T id,
unsigned int verdict);
static int pbl_callback(struct nfq_q_handle *qh, struct nfgenmsg *nfmsg,
struct nfq_data *nfa, void *data);
static const configoption_t options[] = {
{"<host>", ARG_NONE, host_section_open, NULL, O_ROOT},
{"</host>", ARG_NONE, common_section_close, NULL, O_ROOT},
{"blacklistbl", ARG_STR, common_option, NULL, O_HOSTSECTION},
{"whitelistbl", ARG_STR, common_option, NULL, O_HOSTSECTION},
{"whitelist", ARG_STR, common_option, NULL, O_HOSTSECTION},
{"blacklist", ARG_STR, common_option, NULL, O_HOSTSECTION},
{"fallthroughaccept", ARG_TOGGLE, toggle_option, NULL, O_ROOT},
{"allownonport25", ARG_TOGGLE, toggle_option, NULL, O_ROOT},
{"allownonsyn", ARG_TOGGLE, toggle_option, NULL, O_ROOT},
{"dryrun", ARG_TOGGLE, toggle_option, NULL, O_ROOT},
{"quiet", ARG_TOGGLE, toggle_option, NULL, O_ROOT},
#ifdef USE_CACHE
{"cachettl", ARG_INT, toggle_option, NULL, O_ROOT},
{"cachesize", ARG_INT, toggle_option, NULL, O_ROOT},
#endif
{"logfacility", ARG_STR, facility_option, NULL, O_ROOT},
#ifdef HAVE_NFQUEUE
{"queueno", ARG_INT, common_option, NULL, O_ROOT},
typedef struct facility {
char *string;
int num;
} facility;
static struct facility facenum[] = {
{"auth", LOG_AUTH},
{"authpriv", LOG_AUTHPRIV},
{"cron", LOG_CRON},
{"daemon", LOG_DAEMON},
{"kern", LOG_KERN},
{"lpr", LOG_LPR},
{"mail", LOG_MAIL},
{"news", LOG_NEWS},
{"syslog", LOG_SYSLOG},
{"user", LOG_USER},
{"uucp", LOG_UUCP},
{"local0", LOG_LOCAL0},
{"local1", LOG_LOCAL1},
#endif
LAST_OPTION
};
FUNC_ERRORHANDLER(error_handler) {
fprintf(stderr, "[error] %s\n", msg);
return 1;
}
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}
#endif
/* the get_ip_string is set AFTER the check_packet_*
* calls because of the possibility they could screw with
* msgbuf. They shouldn't, really, but better safe than
* sorry, at least for now. */
if (check_packet_list(&ip, whitelist) == 1) {
if (check_packet_list(&ip, conf.whitelist) == 1) {
get_ip_string(&ip);
if (!conf.quiet) {
if (conf.debug == 0) {
syslog(LOG_INFO,
"[accept whitelist] [%s]",
msgbuf);
} else {
fprintf(stderr,
"[accept whitelist] [%s]",
msgbuf);
}
}
statistics.whitelisthits++;
retval=NF_ACCEPT;
} else
if (check_packet_list(&ip, blacklist) == 1) {
if (check_packet_list(&ip, conf.blacklist) == 1) {
get_ip_string(&ip);
if (!conf.quiet) {
if (conf.debug == 0) {
syslog(LOG_INFO,
"[reject blacklist] [%s]",
msgbuf);
} else {
fprintf(stderr,
"[reject blacklist] [%s]",
msgbuf);
}
}
statistics.blacklisthits++;
retval=NF_DROP;
} else
if (check_packet_dnsbl(&ip, whitelistbl) == 1) {
if (check_packet_dnsbl(&ip, conf.whitelistbl) == 1) {
get_ip_string(&ip);
if (!conf.quiet) {
if (conf.debug == 0) {
syslog(LOG_INFO,
"[accept dnsbl] [%s]",
msgbuf);
} else {
fprintf(stderr,
"[accept dnsbl] [%s]",
msgbuf);
}
}
statistics.whitelistblhits++;
retval=NF_ACCEPT;
} else
if (check_packet_dnsbl(&ip, blacklistbl) == 1) {
if (check_packet_dnsbl(&ip, conf.blacklistbl) == 1) {
get_ip_string(&ip);
if (!conf.quiet) {
if (conf.debug == 0) {
syslog(LOG_INFO,
"[reject dnsbl] [%s]",
msgbuf);
} else {
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* global variables. It may cause the program to abort with a failure
* if the configuration is unreadable or unparsable. Due to this fact,
* it should only be called during start-up and not from the main loop.
*
*/
void parse_config(void) {
configfile_t *configfile;
struct bl_context context;
context.pool = pool_new(NULL);
configfile = dotconf_create(CONFIGFILE, options, (void *)&context,
config_t *config = NULL;
config_setting_t *config_setting = NULL;
struct ce *config_entry = NULL;
int result = 0;
int i = 0;
const char *facstr = NULL;
config_init(config);
result = config_read_file(config, "test.config");
if (result == CONFIG_FALSE) {
CASE_INSENSITIVE);
if (!configfile) {
fprintf(stderr, "Error opening config file\n");
exit(EXIT_FAILURE);
}
if (dotconf_command_loop(configfile) == 0) {
fprintf(stderr, "Error reading configuration file\n");
dotconf_cleanup(configfile);
pool_free(context.pool);
return;
}
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default:
exit(EXIT_FAILURE);
break;
}
}
return;
}
DOTCONF_CB(common_section_close) {
struct bl_context *context = (struct bl_context *)ctx;
return context->current_end_token;
}
DOTCONF_CB(toggle_option) {
if (strcasecmp(cmd->name, "fallthroughaccept") == 0) {
conf.default_accept = cmd->data.value;
return NULL;
}
if (strcasecmp(cmd->name, "allownonport25") == 0) {
conf.allow_non25 = cmd->data.value;
return NULL;
}
if (strcasecmp(cmd->name, "dryrun") == 0) {
conf.dryrun = cmd->data.value;
return NULL;
}
if (strcasecmp(cmd->name, "allownonsyn") == 0) {
conf.allow_nonsyn = cmd->data.value;
return NULL;
}
if (strcasecmp(cmd->name, "quiet") == 0) {
conf.quiet = cmd->data.value;
return NULL;
}
#ifdef USE_CACHE
if (strcasecmp(cmd->name, "cachettl") == 0) {
if (cmd->data.value < 0) {
fprintf(stderr, "Error parsing config: cachettl cannot be a negative value\n");
exit(EXIT_FAILURE);
}
packet_cache_ttl = cmd->data.value;
return NULL;
}
if (strcasecmp(cmd->name, "cachesize") == 0) {
if (cmd->data.value < 0) {
fprintf(stderr, "Error parsing config: cachelen cannot be a negative value\n");
exit(EXIT_FAILURE);
}
packet_cache_len = cmd->data.value;
return NULL;
}
#endif
return NULL;
}
DOTCONF_CB(facility_option) {
if (strcasecmp(cmd->data.str, "auth") == 0) {
conf.log_facility = LOG_AUTH;
} else if (strcasecmp(cmd->data.str, "authpriv") == 0) {
conf.log_facility = LOG_AUTHPRIV;
} else if (strcasecmp(cmd->data.str, "cron") == 0) {
conf.log_facility = LOG_CRON;
} else if (strcasecmp(cmd->data.str, "daemon") == 0) {
conf.log_facility = LOG_DAEMON;
} else if (strcasecmp(cmd->data.str, "kern") == 0) {
conf.log_facility = LOG_KERN;
} else if (strcasecmp(cmd->data.str, "lpr") == 0) {
conf.log_facility = LOG_LPR;
} else if (strcasecmp(cmd->data.str, "mail") == 0) {
conf.log_facility = LOG_MAIL;
} else if (strcasecmp(cmd->data.str, "news") == 0) {
conf.log_facility = LOG_NEWS;
} else if (strcasecmp(cmd->data.str, "syslog") == 0) {
conf.log_facility = LOG_SYSLOG;
} else if (strcasecmp(cmd->data.str, "user") == 0) {
conf.log_facility = LOG_USER;
} else if (strcasecmp(cmd->data.str, "uucp") == 0) {
conf.log_facility = LOG_UUCP;
} else if (strcasecmp(cmd->data.str, "local0") == 0) {
conf.log_facility = LOG_LOCAL0;
} else if (strcasecmp(cmd->data.str, "local1") == 0) {
conf.log_facility = LOG_LOCAL1;
} else if (strcasecmp(cmd->data.str, "local2") == 0) {
conf.log_facility = LOG_LOCAL2;
} else if (strcasecmp(cmd->data.str, "local3") == 0) {
conf.log_facility = LOG_LOCAL3;
} else if (strcasecmp(cmd->data.str, "local4") == 0) {
conf.log_facility = LOG_LOCAL4;
} else if (strcasecmp(cmd->data.str, "local5") == 0) {
conf.log_facility = LOG_LOCAL5;
} else if (strcasecmp(cmd->data.str, "local6") == 0) {
conf.log_facility = LOG_LOCAL6;
} else if (strcasecmp(cmd->data.str, "local7") == 0) {
conf.log_facility = LOG_LOCAL7;
} else {
fprintf(stderr, "Log facility %s is invalid\n",
cmd->data.str);
exit(EXIT_FAILURE);
}
return NULL;
}
DOTCONF_CB(common_option) {
struct config_entry *ce, *tmp=NULL;
#ifdef HAVE_FIREDNS
size_t blacklistlen = 0;
#endif
if (strcasecmp(cmd->name, "queueno") == 0) {
conf.queueno = cmd->data.value;
return NULL;
}
ce = malloc(sizeof(struct config_entry));
if (ce == NULL) {
return NULL;
}
ce->string = (char *)strdup(cmd->data.str);
ce->next = NULL;
if (strcasecmp(cmd->name, "blacklistbl") == 0) {
#ifdef HAVE_FIREDNS
blacklistlen = strlen(ce->string);
if (ce->string[blacklistlen-1] == '.') {
ce->string[blacklistlen-1]='\0';
}
#endif
/* resolution check completely removed. Will put it back
* during config file and architectural revamp. */
if (blacklistbl == NULL) {
blacklistbl = ce;
return NULL;
} else {
tmp = blacklistbl;
}
}
if (strcasecmp(cmd->name, "whitelistbl") == 0) {
#ifdef HAVE_FIREDNS
blacklistlen = strlen(ce->string);
if (ce->string[blacklistlen-1] == '.') {
ce->string[blacklistlen-1]='\0';
}
#endif
/* resolution check completely removed. Will put it back
* during config file and architectural revamp. */
if (whitelistbl == NULL) {
whitelistbl = ce;
return NULL;
} else {
tmp = whitelistbl;
}
}
if (strcasecmp(cmd->name, "whitelist") == 0) {
if (parse_cidr(ce) == -1) {
fprintf(stderr, "Error parsing CIDR in %s, ignoring\n",
ce->string);
free(ce->string);
free(ce);
return NULL;
}
if (whitelist == NULL) {
whitelist = ce;
return NULL;
} else {
tmp = whitelist;
}
}
if (strcasecmp(cmd->name, "blacklist") == 0) {
if (parse_cidr(ce) == -1) {
fprintf(stderr, "Error parsing CIDR in %s, ignoring\n",
ce->string);
free(ce->string);
free(ce);
return NULL;
}
if (blacklist == NULL) {
blacklist = ce;
return NULL;
} else {
tmp = blacklist;
}
}
while (tmp->next != NULL) {
tmp = tmp->next;
}
tmp->next = ce;
return NULL;
}
DOTCONF_CB(host_section_open) {
struct bl_context *context = (struct bl_context *)ctx;
const char *old_end_token = context->current_end_token;
int old_override = context->permissions;
const char *err = NULL;
context->permissions |= O_HOSTSECTION;
context->current_end_token = end_host;
while (!cmd->configfile->eof) {
err = dotconf_command_loop_until_error(cmd->configfile);
if (!err) {
err = "</host> is missing";
break;
}
if (err == context->current_end_token)
break;
dotconf_warning(cmd->configfile, DCLOG_ERR, 0, err);
}
context->current_end_token = old_end_token;
context->permissions = old_override;
if (err != end_host)
return err;
return NULL;
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