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Merge branch 'mbms_tun' into next

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master
Pedro Alvarez 7 years ago
parent 355330dab9 a74d1905b4
commit b460ece601
9 changed files with 47 additions and 177 deletions
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5
lib/include/srslte/upper/gtpu.h
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@ -29,6 +29,7 @@
#include <stdint.h>
#include "srslte/common/common.h"
#include "srslte/common/log.h"
namespace srslte {
@ -58,8 +59,8 @@ typedef struct{
}gtpu_header_t;
bool gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header);
bool gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu);
bool gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header, srslte::log *gtpu_log);
bool gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu, srslte::log *gtpu_log);
inline void uint8_to_uint32(uint8_t *buf, uint32_t *i)
{

14
lib/src/upper/gtpu.cc
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@ -35,18 +35,18 @@ namespace srslte {
* Ref: 3GPP TS 29.281 v10.1.0 Section 5
***************************************************************************/
bool gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu)
bool gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu, srslte::log *gtpu_log)
{
if(header->flags != 0x30) {
//gtpu_log->error("gtpu_write_header - Unhandled header flags: 0x%x\n", header->flags);
gtpu_log->error("gtpu_write_header - Unhandled header flags: 0x%x\n", header->flags);
return false;
}
if(header->message_type != 0xFF) {
//gtpu_log->error("gtpu_write_header - Unhandled message type: 0x%x\n", header->message_type);
gtpu_log->error("gtpu_write_header - Unhandled message type: 0x%x\n", header->message_type);
return false;
}
if(pdu->get_headroom() < GTPU_HEADER_LEN) {
//gtpu_log->error("gtpu_write_header - No room in PDU for header\n");
gtpu_log->error("gtpu_write_header - No room in PDU for header\n");
return false;
}
@ -66,7 +66,7 @@ bool gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu)
return true;
}
bool gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header)
bool gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header, srslte::log *gtpu_log)
{
uint8_t *ptr = pdu->msg;
@ -82,11 +82,11 @@ bool gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header)
uint8_to_uint32(ptr, &header->teid);
if(header->flags != 0x30) {
//gtpu_log->error("gtpu_read_header - Unhandled header flags: 0x%x\n", header->flags);
gtpu_log->error("gtpu_read_header - Unhandled header flags: 0x%x\n", header->flags);
return false;
}
if(header->message_type != 0xFF) {
//gtpu_log->error("gtpu_read_header - Unhandled message type: 0x%x\n", header->message_type);
gtpu_log->error("gtpu_read_header - Unhandled message type: 0x%x\n", header->message_type);
return false;
}

17
srsenb/hdr/upper/gtpu.h
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@ -58,14 +58,6 @@ namespace srsenb {
#define GTPU_HEADER_LEN 8
typedef struct{
uint8_t flags; // Only support 0x30 - v1, PT1 (GTP), no other flags
uint8_t message_type; // Only support 0xFF - T-PDU type
uint16_t length;
uint32_t teid;
}gtpu_header_t;
class gtpu
:public gtpu_interface_rrc
,public gtpu_interface_pdcp
@ -93,8 +85,6 @@ private:
bool running;
bool run_enable;
bool enable_mbsfn;
std::string gtp_bind_addr;
std::string mme_addr;
@ -143,13 +133,6 @@ private:
pthread_mutex_t mutex;
/****************************************************************************
* Header pack/unpack helper functions
* Ref: 3GPP TS 29.281 v10.1.0 Section 5
***************************************************************************/
bool gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu);
bool gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header);
/****************************************************************************
* TEID to RNIT/LCID helper functions
***************************************************************************/

73
srsenb/src/upper/gtpu.cc
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@ -23,7 +23,7 @@
* and at http://www.gnu.org/licenses/.
*
*/
#include "srslte/upper/gtpu.h"
#include "srsenb/hdr/upper/gtpu.h"
#include <unistd.h>
#include <sys/socket.h>
@ -31,7 +31,6 @@
#include <errno.h>
using namespace srslte;
namespace srsenb {
gtpu::gtpu():mchthread()
@ -148,7 +147,7 @@ void gtpu::write_pdu(uint16_t rnti, uint32_t lcid, srslte::byte_buffer_t* pdu)
servaddr.sin_addr.s_addr = htonl(rnti_bearers[rnti].spgw_addrs[lcid]);
servaddr.sin_port = htons(GTPU_PORT);
gtpu_write_header(&header, pdu);
gtpu_write_header(&header, pdu, gtpu_log);
if (sendto(snk_fd, pdu->msg, pdu->N_bytes, MSG_EOR, (struct sockaddr*)&servaddr, sizeof(struct sockaddr_in))<0) {
perror("sendto");
}
@ -230,7 +229,7 @@ void gtpu::run_thread()
pdu->N_bytes = (uint32_t) n;
gtpu_header_t header;
gtpu_read_header(pdu, &header);
gtpu_read_header(pdu, &header,gtpu_log);
uint16_t rnti = 0;
uint16_t lcid = 0;
@ -265,69 +264,6 @@ void gtpu::run_thread()
running = false;
}
/****************************************************************************
* Header pack/unpack helper functions
* Ref: 3GPP TS 29.281 v10.1.0 Section 5
***************************************************************************/
bool gtpu::gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu)
{
if(header->flags != 0x30) {
gtpu_log->error("gtpu_write_header - Unhandled header flags: 0x%x\n", header->flags);
return false;
}
if(header->message_type != 0xFF) {
gtpu_log->error("gtpu_write_header - Unhandled message type: 0x%x\n", header->message_type);
return false;
}
if(pdu->get_headroom() < GTPU_HEADER_LEN) {
gtpu_log->error("gtpu_write_header - No room in PDU for header\n");
return false;
}
pdu->msg -= GTPU_HEADER_LEN;
pdu->N_bytes += GTPU_HEADER_LEN;
uint8_t *ptr = pdu->msg;
*ptr = header->flags;
ptr++;
*ptr = header->message_type;
ptr++;
uint16_to_uint8(header->length, ptr);
ptr += 2;
uint32_to_uint8(header->teid, ptr);
return true;
}
bool gtpu::gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header)
{
uint8_t *ptr = pdu->msg;
pdu->msg += GTPU_HEADER_LEN;
pdu->N_bytes -= GTPU_HEADER_LEN;
header->flags = *ptr;
ptr++;
header->message_type = *ptr;
ptr++;
uint8_to_uint16(ptr, &header->length);
ptr += 2;
uint8_to_uint32(ptr, &header->teid);
if(header->flags != 0x30) {
gtpu_log->error("gtpu_read_header - Unhandled header flags: 0x%x\n", header->flags);
return false;
}
if(header->message_type != 0xFF) {
gtpu_log->error("gtpu_read_header - Unhandled message type: 0x%x\n", header->message_type);
return false;
}
return true;
}
/****************************************************************************
* TEID to RNIT/LCID helper functions
***************************************************************************/
@ -428,6 +364,9 @@ void gtpu::mch_thread::run_thread()
pdu->N_bytes = (uint32_t) n;
gtpu_header_t header;
gtpu_read_header(pdu, &header, gtpu_log);
pdcp->write_sdu(SRSLTE_MRNTI, lcid, pdu);
do {
pdu = pool_allocate;

1
srsepc/hdr/mbms-gw/mbms-gw.h
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@ -49,6 +49,7 @@ const uint16_t GTPU_RX_PORT = 2152;
typedef struct {
std::string name;
std::string sgi_mb_if_addr;
std::string sgi_mb_if_mask;
std::string m1u_multi_addr;
} mbms_gw_args_t;

3
srsepc/mbms.conf.example
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@ -12,7 +12,8 @@
#####################################################################
[mbms_gw]
name = srsmbmsgw01
sgi_mb_if_addr = 172.16.1.1
sgi_mb_if_addr = 172.16.0.254
sgi_mb_if_mask = 255.255.255.255
m1u_multi_addr = 239.255.0.1
####################################################################

8
srsepc/src/mbms-gw/main.cc
Unescape Escape View File

@ -83,6 +83,7 @@ parse_args(all_args_t *args, int argc, char* argv[]) {
string mbms_gw_name;
string mbms_gw_sgi_mb_if_addr;
string mbms_gw_sgi_mb_if_mask;
string mbms_gw_m1u_multi_addr;
string log_filename;
@ -99,8 +100,9 @@ parse_args(all_args_t *args, int argc, char* argv[]) {
common.add_options()
("mbms_gw.name", bpo::value<string>(&mbms_gw_name)->default_value("srsmbmsgw01"), "MBMS-GW Name")
("mbms_gw.sgi_mb_if_addr", bpo::value<string>(&mbms_gw_sgi_mb_if_addr)->default_value("172.16.1.1"), "SGi-mb TUN interface Address")
("mbms_gw.m1u_multi_addr", bpo::value<string>(&mbms_gw_m1u_multi_addr)->default_value("239.255.0.1"), "M1-u GTPu destination multicast address")
("mbms_gw.sgi_mb_if_addr", bpo::value<string>(&mbms_gw_sgi_mb_if_addr)->default_value("172.16.1.1"), "SGi-mb TUN interface Address.")
("mbms_gw.sgi_mb_if_mask", bpo::value<string>(&mbms_gw_sgi_mb_if_mask)->default_value("255.255.255.255"), "SGi-mb TUN interface mask.")
("mbms_gw.m1u_multi_addr", bpo::value<string>(&mbms_gw_m1u_multi_addr)->default_value("239.255.0.1"), "M1-u GTPu destination multicast address.")
("log.all_level", bpo::value<string>(&args->log_args.all_level)->default_value("info"), "ALL log level")
("log.all_hex_limit", bpo::value<int>(&args->log_args.all_hex_limit)->default_value(32), "ALL log hex dump limit")
@ -152,7 +154,9 @@ parse_args(all_args_t *args, int argc, char* argv[]) {
args->mbms_gw_args.name = mbms_gw_name;
args->mbms_gw_args.sgi_mb_if_addr = mbms_gw_sgi_mb_if_addr;
args->mbms_gw_args.sgi_mb_if_mask = mbms_gw_sgi_mb_if_mask;
args->mbms_gw_args.m1u_multi_addr = mbms_gw_m1u_multi_addr;
// Apply all_level to any unset layers
if (vm.count("log.all_level")) {
if(!vm.count("log.mbms_gw_level")) {

65
srsepc/src/mbms-gw/mbms-gw.cc
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@ -196,7 +196,7 @@ mbms_gw::init_sgi_mb_if(mbms_gw_args_t *args)
}
ifr.ifr_netmask.sa_family = AF_INET;
((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr = inet_addr("255.255.255.0");
((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr = inet_addr(args->sgi_mb_if_mask.c_str());
if (ioctl(sgi_mb_sock, SIOCSIFNETMASK, &ifr) < 0) {
m_mbms_gw_log->error("Failed to set TUN interface Netmask. Error: %s\n", strerror(errno));
close(m_sgi_mb_if);
@ -285,8 +285,6 @@ mbms_gw::handle_sgi_md_pdu(srslte::byte_buffer_t *msg)
{
uint8_t version;
srslte::gtpu_header_t header;
in_addr_t baddr = inet_addr("172.16.0.255");
in_addr_t saddr = inet_addr("172.16.0.254");
//Setup GTP-U header
header.flags = 0x30;
@ -301,46 +299,16 @@ mbms_gw::handle_sgi_md_pdu(srslte::byte_buffer_t *msg)
return;
}
//IP+UDP Headers
//IP Headers
struct iphdr *iph = (struct iphdr *) msg->msg;
struct udphdr *udph = (struct udphdr *) (msg->msg + iph->ihl*4);
if(iph->version != 4)
{
m_mbms_gw_log->warning("IPv6 not supported yet.\n");
return;
}
//Replace Destination IP with broadcast address
iph->daddr = baddr;
//Replace Source IP with address in same subnet
iph->saddr = saddr;
//Replace IP cheksum
iph->check = 0;
iph->check = in_cksum((uint16_t*)msg->msg,4*(msg->msg[0] & 0x0F));
//Set Pseudo Header
struct pseudo_hdr phdr;
phdr.src_addr = iph->saddr;
phdr.dst_addr = iph->daddr;
phdr.protocol = IPPROTO_UDP;
phdr.placeholder = 0;
phdr.udp_len = udph->len;
//Set Pseudo Datagram
udph->check = 0;
int psize = sizeof(struct pseudo_hdr) + ntohs(udph->len);
uint8_t * pseudo_dgram = (uint8_t*) malloc(psize);
memcpy(pseudo_dgram, &phdr,sizeof(struct pseudo_hdr));
memcpy(pseudo_dgram+sizeof(pseudo_hdr),udph,ntohs(udph->len));
//Recompute UDP checksum
udph->check = in_cksum((uint16_t*) pseudo_dgram, psize);
free(pseudo_dgram);
//Write GTP-U header into packet
if(!srslte::gtpu_write_header(&header, msg))
if(!srslte::gtpu_write_header(&header, msg, m_mbms_gw_log))
{
m_mbms_gw_log->console("Error writing GTP-U header on PDU\n");
}
@ -355,31 +323,4 @@ mbms_gw::handle_sgi_md_pdu(srslte::byte_buffer_t *msg)
}
}
uint16_t
mbms_gw::in_cksum(uint16_t *iphdr, int count)
{
//RFC 1071
uint32_t sum = 0;
uint16_t padd = 0;
uint16_t result;
while(count > 1)
{
sum+= *iphdr++;
count -= 2;
}
if( count > 0 )
{
padd = * (uint8_t *) iphdr;
sum += padd;
}
/*Fold 32-bit sum to 16-bit*/
// while(sum>>16)
// sum = (sum & 0xffff) + (sum >> 16);
sum = (sum>>16)+(sum & 0xFFFF);
sum = sum + (sum >> 16);
result = (uint16_t) ~sum;
return result;
}
} //namespace srsepc

4
srsepc/src/spgw/spgw.cc
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@ -369,7 +369,7 @@ spgw::handle_sgi_pdu(srslte::byte_buffer_t *msg)
header.teid = enb_fteid.teid;
//Write header into packet
if(!srslte::gtpu_write_header(&header, msg))
if(!srslte::gtpu_write_header(&header, msg, m_spgw_log))
{
m_spgw_log->console("Error writing GTP-U header on PDU\n");
}
@ -395,7 +395,7 @@ spgw::handle_s1u_pdu(srslte::byte_buffer_t *msg)
{
//m_spgw_log->console("Received PDU from S1-U. Bytes=%d\n",msg->N_bytes);
srslte::gtpu_header_t header;
srslte::gtpu_read_header(msg, &header);
srslte::gtpu_read_header(msg, &header, m_spgw_log);
//m_spgw_log->console("TEID 0x%x. Bytes=%d\n", header.teid, msg->N_bytes);
int n = write(m_sgi_if, msg->msg, msg->N_bytes);

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