readconf.c

这是一个关于linux下上外网的drcom1.4.4

		}
	}
	else if (__isopt("device", 6))
	{
		if (optval_len == 0) { goto ok; }
		else
		{
			int s;
			struct ifreq ifr;
			struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr;

			s = socket (AF_INET, SOCK_DGRAM, 0);
			if (s == -1) {
				fprintf(stderr, "Cannot Create DGRAM socket to get device address\n");
				goto err;
			}
			strncpy(ifr.ifr_name, optval, IFNAMSIZ);
			r = ioctl(s, SIOCGIFHWADDR, &ifr);
			if (r != 0) {
				fprintf(stderr, "Cannot get device mac address\n");
				close(s);
				goto err;
			}
			memcpy(conf->mac0, ifr.ifr_hwaddr.sa_data, 6);
			opts->mac0 = 1;

			strncpy(ifr.ifr_name, optval, IFNAMSIZ);
			r = ioctl(s, SIOCGIFADDR, &ifr);
			if (r != 0) {
				fprintf(stderr, "Cannot get device mac address\n");
				close(s);
				goto err;
			}
			conf->nic[0] = sin->sin_addr.s_addr; opts->nic[0] = 1;

			close(s);

			strncpy(conf->device, optval, IFNAMSIZ);
			conf->device[IFNAMSIZ-1] = '\0';
			opts->dev = 1;

			goto ok;
		}
	}
	else if (__isopt("mac", 3))
	{
		if (opts->mac != 0) { opts->mac = 4; goto ok; }
		if (optval_len == 0) { opts->mac = 3; goto ok; }
		else
		{
			r = sscanf(optval, "%02x:%02x:%02x:%02x:%02x:%02x",
				 &_mac[0], &_mac[1], &_mac[2], &_mac[3], &_mac[4], &_mac[5]);
			if (r < 6) { opts->mac = 2; goto err; }
			conf->mac[0] = _mac[0]; conf->mac[1] = _mac[1]; conf->mac[2] = _mac[2];
			conf->mac[3] = _mac[3]; conf->mac[4] = _mac[4]; conf->mac[5] = _mac[5];
			opts->mac = 1; goto ok;
		}
	}
	else if (__optprefix("nic", 3)) goto ok;
/*
	else if (__optprefix("nic", 3))
	{
		if (optname_len > 4) goto err;
		l = optname[3] - '0';
		if (l >= 0 && l <= 3)
		{
			if (opts->nic[l] != 0) { opts->nic[l] = 4; goto ok; }
			if (optval_len == 0) { opts->nic[l] = 3; goto ok; }
			r = inet_pton(AF_INET, optval, &ip);
			if (r == 0) { opts->nic[l] = 2; goto err; }
			conf->nic[l] = ip.s_addr;
			opts->nic[l] = 1;
		}
		else goto err;
	}
*/
	else if (__optprefix("dns", 3))
	{
		if (optname_len > 4) goto err;
		switch (optname[3])
		{
			case 'p':
				if (opts->dnsp != 0) { opts->dnsp = 4; goto ok; }
				if (optval_len == 0) { opts->dnsp = 3; goto ok; }
				r = inet_pton(AF_INET, optval, &ip);
				if (r == 0) { opts->dnsp = 2; goto err; }
				conf->dnsp = ip.s_addr;
				opts->dnsp =	1; goto ok;
				break;
			case 's':
				if (opts->dnss != 0) { opts->dnss = 4; goto ok; }
				if (optval_len == 0) { opts->dnss = 3; goto ok; }
				r = inet_pton(AF_INET, optval, &ip);
				if (r == 0) { opts->dnss = 2; goto err; }
				conf->dnss = ip.s_addr;
				opts->dnss =	1; goto ok;
				break;
			default: goto err; break;
		}
	}
	else if (__isopt("dhcp", 4))
	{
		if (opts->dhcp != 0) { opts->dhcp = 4; goto ok; }
		if (optval_len == 0) { opts->dhcp = 3; goto ok; }
		r = inet_pton(AF_INET, optval, &ip);
		if (r == 0) { opts->dhcp = 2; goto err; }
		conf->dhcp = ip.s_addr;
		opts->dhcp = 1; goto ok;
	}
	else if (__isopt("hostip", 6))
	{
		if (opts->hostip != 0) { opts->hostip = 4; goto ok; }
		if (optval_len == 0) { opts->hostip = 3; goto ok; }
		r = inet_pton(AF_INET, optval, &ip);
		if (r == 0)
		{ opts->hostip = (get_interface_ipaddr(optval, &conf->hostip) == 0) ? 1 : 2; goto ok; }
		conf->hostip = ip.s_addr;
		opts->hostip = 1;
	}
	else if (__isopt("servip", 6))
	{
		if (opts->servip != 0) { opts->servip = 4; goto ok; }
		if (optval_len == 0) { opts->servip = 3; goto ok; }
		r = inet_pton(AF_INET, optval, &ip);
		if (r == 0) { opts->servip = 2; goto err; }
		conf->servip = ip.s_addr;
		opts->servip = 1;
	}
	else if (__isopt("hostport", 8))
	{
		if (opts->hostport != 0) { opts->hostport = 4; goto ok; }
		if (optval_len == 0) { opts->hostport = 3; goto ok; }
		l = strtol(optval, (char **) NULL, 0);
		if ((l == LONG_MIN || l == LONG_MAX) || l > 0xffff)
		{ opts->hostport = 2; goto err; }
		conf->hostport = (u_int16_t) l;
		opts->hostport = 1; goto ok;
	}
	else if (__isopt("servport", 8))
	{
		if (opts->servport != 0) { opts->servport = 4; goto ok; }
		if (optval_len == 0) { opts->servport = 3; goto ok; }
		l = strtol(optval, (char **) NULL, 0);
		if ((l == LONG_MIN || l == LONG_MAX) || l > 0xffff)
		{ opts->servport = 2; goto err; }
		conf->servport = (u_int16_t) l;
		opts->servport = 1; goto ok;
	}
	else if (__isopt("hostname", 8))
	{
		if (opts->hostname != 0) { opts->hostname = 4; goto ok; }
		if (optval_len == 0) { opts->hostname = 3; goto ok; }
		memset(conf->hostname, 0, 32);
		strncpy(conf->hostname, optval, 32);
		opts->hostname = 1; goto ok;
	}
	else if (__isopt("winver", 6))
	{
		if (opts->winver != 0) { opts->winver = 4; goto ok; }
		if (optval_len == 0) { opts->winver = 3; goto ok; }
		r = sscanf(optval, "%u.%u", &conf->winver_major, &conf->winver_minor);
		if (r < 2) { opts->winver = 2; goto err; }
		opts->winver = 1; goto ok;
	}
	else if (__isopt("winbuild", 8))
	{
		if (opts->winbuild != 0) { opts->winbuild = 4; goto ok; }
		if (optval_len == 0) { opts->winbuild = 3; goto ok; }
		r = sscanf(optval, "%u", &conf->winver_build);
		if (r < 1) { opts->winbuild = 2; goto err; }
		opts->winbuild = 1; goto ok;
	}
	else if (__isopt("servicepack", 11))
	{
		if (opts->servicepack != 0) { opts->servicepack = 4; goto ok; }
		if (optval_len == 0) { opts->servicepack = 3; goto ok; }
		memset(conf->servicepack, 0, 32);
		strncpy(conf->servicepack, optval, 32);
		opts->servicepack = 1; goto ok;
	}
	else if(__isopt("autologout", 10))
	{
		if(optval_len != 0 && optval[0] == '1' ){
			conf->autologout = 1; goto ok; 
		}else{
			conf->autologout =0; goto ok;
		}
	}else { goto err; }

ok:
	return 0;

skip:
	return 1;

err:
	return 2;
}

int __fillopts(struct drcom_conf *conf, struct drcom_info *info, struct drcom_host *host, struct _opt_checklist *opts)
{
	/* Check the options one by one */

	if (opts->username == 1)
		memcpy(info->username, conf->username, 36);
	else
		return -1;

	if (opts->password == 1)
		memcpy(info->password, conf->password, 16);
	else
		return -1;

	if (opts->dev == 1)
		memcpy(info->device, conf->device, IFNAMSIZ);
	else {
		fprintf(stderr, "device not specified\n");
		return -1;
	}

	if (opts->mac == 1)
		memcpy(info->mac, conf->mac, 6);
	else if (opts->mac0 == 1) {
		memcpy(info->mac, conf->mac0, 6);
		memcpy(conf->mac, conf->mac0, 6);
	}
	else if (opts->mac == 0 || opts->mac == 3)
		memset(info->mac, 0, 6);
	else
		return -1;

	if (opts->nic[0] == 1)
		info->nic[0] = conf->nic[0];
	else
		return -1;

	if (opts->nic[1] == 1)
		info->nic[1] = conf->nic[1];
	else if (opts->nic[1] == 0 || opts->nic[1] == 3)
		info->nic[1] = 0;
	else
		return -1;

	if (opts->nic[2] == 1)
		info->nic[2] = conf->nic[2];
	else if (opts->nic[2] == 0 || opts->nic[2] == 3)
		info->nic[2] = 0;
	else
		return -1;

	if (opts->nic[3] == 1)
		info->nic[3] = conf->nic[3];
	else if (opts->nic[3] == 0 || opts->nic[3] == 3)
		info->nic[3] = 0;
	else
		return -1;

	if (opts->dnsp == 1)
		host->dnsp = conf->dnsp;
	else
		return -1;

	if (opts->dnss == 1)
		host->dnss = conf->dnss;
	else
		return -1;

	if (opts->dhcp == 1)
		host->dhcp = conf->dhcp;
	else if (opts->dhcp == 0 || opts->dhcp == 3)
		host->dhcp = 0xffffffff;	/* Like Windows XP */
	else
		return -1;

	/* No need to check for validity of conf->nic[0] here,
		 since it's already checked */
	if (opts->hostip == 1)
		info->hostip = conf->hostip;
	else if (opts->hostip == 0 || opts->hostip == 3)
		info->hostip = conf->nic[0];
	else
		return -1;

	if (opts->servip == 1)
		info->servip = conf->servip;
	else if (opts->servip == 0 || opts->servip == 3)
		info->servip = 0x01010101; /* 1.1.1.1 */
	else
		return -1;

	if (opts->hostport == 1)
		info->hostport = conf->hostport;
	else if (opts->hostport == 0 || opts->hostport == 3)
		info->hostport = 0xf000; /* 61440 */
	else
		return -1;

	if (opts->servport == 1)
		info->servport = conf->servport;
	else if (opts->servport == 0 || opts->servport == 3)
		info->servport = 0xf000; /* 61440 */
	else
		return -1;

	if (opts->hostname == 1)
		memcpy(host->hostname, conf->hostname, 32);
	else if (opts->hostname == 0 || opts->hostname == 3)
	{
		memset(host->hostname, 0, 32);
		strncpy(host->hostname, "localhost", 32);	/* Does Windows XP use this? */
	}
	else
		return -1;

	if (opts->winver == 1)
	{
		host->winver_major = conf->winver_major;
		host->winver_minor = conf->winver_minor;
	}
	else if (opts->winver == 0 || opts->winver == 3)
	{
		host->winver_major = 5;	/* Windows XP's version */
		host->winver_minor = 1;	/* is NT 5.1 */
	}
	else
		return -1;

	if (opts->winbuild == 1)
		host->winver_build = conf->winver_build;
	else if (opts->winbuild == 0 || opts->winbuild == 3)
		host->winver_build = 2600;	/* Windows XP is of build 2600 */
	else
		return -1;

	if (opts->servicepack == 1)
		memcpy(host->servicepack, conf->servicepack, 32);
	else if (opts->servicepack == 0 || opts->servicepack == 3)
	{
		memset(host->servicepack, 0, 32);
		strncpy(host->servicepack, "Service Pack 2", 32); /* The latest XP sp */
	}
	else
		return -1;

	/* Finally, the easy ones */
	host->zero0[0] = 0;
	host->zero0[1] = 0;
	host->unknown0 = 148;
	host->unknown1 = 2;

	return 0;
}