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163 lines
3.3 KiB
163 lines
3.3 KiB
8 years ago
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/* Copyright 2016 Alex 'AdUser' Z (ad_user@runbox.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "source.h"
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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#define DEFAULT_MCAST_ADDR "239.255.186.1"
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#define DEFAULT_MCAST_PORT 3370
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struct _config {
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char name[32];
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char error[256];
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void (*errcb)(char *errstr);
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char addr[INET_STRADDRLEN];
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char iface[16];
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uint16_t port;
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int sock;
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};
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static void
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errcb_stub(char *str) {
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assert(str != NULL);
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(void)(str);
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}
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cfg_t *
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create(const char *init) {
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cfg_t *cfg = NULL;
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assert(init != NULL);
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if ((cfg = calloc(1, sizeof(cfg_t))) == NULL)
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return NULL;
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strlcpy(cfg->name, init, sizeof(cfg->name));
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strlcpy(cfg->addr, DEFAULT_MCAST_ADDR, sizeof(cfg->addr));
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cfg->port = DEFAULT_MCAST_PORT;
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cfg->errcb = &errcb_stub;
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return cfg;
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}
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bool
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config(cfg_t *cfg, const char *key, const char *value) {
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assert(cfg != NULL);
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assert(key != NULL);
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assert(value != NULL);
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if (strcmp(key, "address") == 0) {
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if (strncmp(value, "239.255.", 8) != 0) {
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strlcpy(cfg->error, "mcast address should be inside 239.255.0.0/16 block");
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return false;
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}
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strlcpy(cfg->addr, value, sizeof(cfg->addr));
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return true;
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}
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if (strcmp(key, "port") == 0) {
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cfg->port = atoi(value);
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return true;
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}
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if (strcmp(key, "iface") == 0) {
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strlcpy(cfg->iface, value, sizeof(cfg->iface));
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return true;
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}
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return false;
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}
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bool
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ready(cfg_t *cfg) {
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assert(cfg != NULL);
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if (cfg->addr[0] != '\0')
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return true;
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return false;
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}
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char *
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error(cfg_t *cfg) {
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assert(cfg != NULL);
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return cfg->error;
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}
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void
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errcb(cfg_t *cfg, void (*cb)(char *errstr)) {
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assert(cfg != NULL);
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assert(cb != NULL);
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cfg->errcb = cb;
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}
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bool
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start(cfg_t *cfg) {
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struct addrinfo hints;
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struct addrinfo *result;
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int opt;
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assert(cfg != NULL);
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memset(&hints, 0, sizeof(struct addrinfo));
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = 0;
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int ret = getaddrinfo(cfg->addr, cfg->port, &hints, &result);
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for (struct addrinfo *rp = result; rp != NULL; rp = rp->ai_next) {
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cfg->sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
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if (cfg->sock == -1)
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continue;
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if ((opt = fcntl(cfg->sock, F_GETFL, 0)) < 0)
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continue;
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fcntl(cfg->sock, F_SETFL, opt | O_NONBLOCK);
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opt = 1;
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setsockopt(cfg->sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
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if (connect(cfg->sock, rp->ai_addr, rp->ai_addrlen) == 0) {
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break; /* success */
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}
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freeaddrinfo(result);
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/* setsockopt -- socket(7) -- SO_BINDTODEVICE */
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if (cfg->sock < 0) {
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snprintf(cfg->error, sizeof(cfg->error), "can't bind to %s:%s", cfg->host, cfg->port);
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return false;
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}
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/* TODO */
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return true;
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}
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bool
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stop(cfg_t *cfg) {
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assert(cfg != NULL);
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/* TODO */
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return true;
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}
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bool
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next(cfg_t *cfg, char *buf, size_t bufsize, bool reset) {
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assert(cfg != NULL);
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assert(buf != NULL);
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assert(bufsize > 0);
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/* TODO */
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return false;
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}
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void
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destroy(cfg_t *cfg) {
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f2b_port_t *next;
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assert(cfg != NULL);
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free(cfg);
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}
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