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/* $Id$ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pj/sock_qos.h>
#include <pj/assert.h>
#include <pj/errno.h>
#include <pj/string.h>
/* This is the implementation of QoS with BSD socket's setsockopt(),
* using IP_TOS/IPV6_TCLASS and SO_PRIORITY
*/
#if !defined(PJ_QOS_IMPLEMENTATION) || PJ_QOS_IMPLEMENTATION==PJ_QOS_BSD
PJ_DEF(pj_status_t) pj_sock_set_qos_params(pj_sock_t sock,
pj_qos_params *param)
{
pj_status_t last_err = PJ_ENOTSUP;
pj_status_t status;
/* No op? */
if (!param->flags)
return PJ_SUCCESS;
/* Clear WMM field since we don't support it */
param->flags &= ~(PJ_QOS_PARAM_HAS_WMM);
/* Set TOS/DSCP */
if (param->flags & PJ_QOS_PARAM_HAS_DSCP) {
/* We need to know if the socket is IPv4 or IPv6 */
pj_sockaddr sa;
int salen = sizeof(salen);
/* Value is dscp_val << 2 */
int val = (param->dscp_val << 2);
status = pj_sock_getsockname(sock, &sa, &salen);
if (status != PJ_SUCCESS)
return status;
if (sa.addr.sa_family == pj_AF_INET()) {
/* In IPv4, the DS field goes in the TOS field */
status = pj_sock_setsockopt(sock, pj_SOL_IP(), pj_IP_TOS(),
&val, sizeof(val));
} else if (sa.addr.sa_family == pj_AF_INET6()) {
/* In IPv6, the DS field goes in the Traffic Class field */
status = pj_sock_setsockopt(sock, pj_SOL_IPV6(),
pj_IPV6_TCLASS(),
&val, sizeof(val));
} else {
status = PJ_EINVAL;
}
if (status != PJ_SUCCESS) {
param->flags &= ~(PJ_QOS_PARAM_HAS_DSCP);
last_err = status;
}
}
/* Set SO_PRIORITY */
if (param->flags & PJ_QOS_PARAM_HAS_SO_PRIO) {
int val = param->so_prio;
status = pj_sock_setsockopt(sock, pj_SOL_SOCKET(), pj_SO_PRIORITY(),
&val, sizeof(val));
if (status != PJ_SUCCESS) {
param->flags &= ~(PJ_QOS_PARAM_HAS_SO_PRIO);
last_err = status;
}
}
return param->flags ? PJ_SUCCESS : last_err;
}
PJ_DEF(pj_status_t) pj_sock_set_qos_type(pj_sock_t sock,
pj_qos_type type)
{
pj_qos_params param;
pj_status_t status;
status = pj_qos_get_params(type, ¶m);
if (status != PJ_SUCCESS)
return status;
return pj_sock_set_qos_params(sock, ¶m);
}
PJ_DEF(pj_status_t) pj_sock_get_qos_params(pj_sock_t sock,
pj_qos_params *p_param)
{
pj_status_t last_err = PJ_ENOTSUP;
int val, optlen;
pj_sockaddr sa;
int salen = sizeof(salen);
pj_status_t status;
pj_bzero(p_param, sizeof(*p_param));
/* Get DSCP/TOS value */
status = pj_sock_getsockname(sock, &sa, &salen);
if (status == PJ_SUCCESS) {
optlen = sizeof(val);
if (sa.addr.sa_family == pj_AF_INET()) {
status = pj_sock_getsockopt(sock, pj_SOL_IP(), pj_IP_TOS(),
&val, &optlen);
} else if (sa.addr.sa_family == pj_AF_INET6()) {
status = pj_sock_getsockopt(sock, pj_SOL_IPV6(),
pj_IPV6_TCLASS(),
&val, &optlen);
} else {
status = PJ_EINVAL;
}
if (status == PJ_SUCCESS) {
p_param->flags |= PJ_QOS_PARAM_HAS_DSCP;
p_param->dscp_val = (pj_uint8_t)(val >> 2);
} else {
last_err = status;
}
} else {
last_err = status;
}
/* Get SO_PRIORITY */
optlen = sizeof(val);
status = pj_sock_getsockopt(sock, pj_SOL_SOCKET(), pj_SO_PRIORITY(),
&val, &optlen);
if (status == PJ_SUCCESS) {
p_param->flags |= PJ_QOS_PARAM_HAS_SO_PRIO;
p_param->so_prio = (pj_uint8_t)val;
} else {
last_err = status;
}
/* WMM is not supported */
return p_param->flags ? PJ_SUCCESS : last_err;
}
PJ_DEF(pj_status_t) pj_sock_get_qos_type(pj_sock_t sock,
pj_qos_type *p_type)
{
pj_qos_params param;
pj_status_t status;
status = pj_sock_get_qos_params(sock, ¶m);
if (status != PJ_SUCCESS)
return status;
return pj_qos_get_type(¶m, p_type);
}
#endif /* PJ_QOS_IMPLEMENTATION */
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