2017-03-26 15:48:33 +00:00
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#define TRACE_MODULE _gtp_xact
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#include "core_debug.h"
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#include "core_pool.h"
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2017-03-27 10:12:45 +00:00
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#include "core_event.h"
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2017-03-26 15:48:33 +00:00
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#include "gtp_xact.h"
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2017-03-27 10:12:45 +00:00
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#include "gtp_tlv.h"
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2017-03-26 15:48:33 +00:00
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#define SIZE_OF_GTP_XACT_POOL 32
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#define GTP_XACT_NEXT_ID(__id) \
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((__id) == 0x800000 ? 1 : ((__id) + 1))
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#define GTP_XACT_COMPARE_ID(__id1, __id2) \
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((__id2) > (__id1) ? ((__id2) - (__id1) < 0x7fffff ? -1 : 1) : \
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(__id1) > (__id2) ? ((__id1) - (__id2) < 0x7fffff ? 1 : -1) : 0)
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2017-03-27 10:12:45 +00:00
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/* 5.1 General format */
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#define GTPV2C_HEADER_LEN 12
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#define GTPV2C_TEID_LEN 4
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typedef struct _gtpv2c_header_t {
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ED4(c_uint8_t version:3;,
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c_uint8_t piggybacked:1;,
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c_uint8_t teid_presence:1;,
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c_uint8_t spare1:3;)
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c_uint8_t type;
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c_uint16_t length;
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union {
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struct {
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c_uint32_t teid;
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/* sqn : 31bit ~ 8bit, spare : 7bit ~ 0bit */
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#define GTP_XID_TO_SQN(__xid) ((__xid) << 8)
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#define GTP_SQN_TO_XID(__sqn) ((__sqn) >> 8)
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c_uint32_t sqn;
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};
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/* sqn : 31bit ~ 8bit, spare : 7bit ~ 0bit */
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c_uint32_t spare2;
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};
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} __attribute__ ((packed)) gtpv2c_header_t;
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2017-03-27 10:12:45 +00:00
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static int g_gtp_xact_initialized = 0;
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2017-03-26 15:48:33 +00:00
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pool_declare(gtp_xact_pool, gtp_xact_ctx_t, SIZE_OF_GTP_XACT_POOL);
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/**
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* Initialize the transaction framework
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*/
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2017-03-27 10:12:45 +00:00
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status_t gtp_xact_init()
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2017-03-26 15:48:33 +00:00
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{
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d_assert(g_gtp_xact_initialized == 0, return CORE_ERROR,
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"XACTION already has been initialized");
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pool_init(>p_xact_pool, SIZE_OF_GTP_XACT_POOL);
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g_gtp_xact_initialized = 1;
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return CORE_OK;
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}
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/**
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* Finalize the transaction framework
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*/
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status_t gtp_xact_final(void)
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{
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d_assert(g_gtp_xact_initialized == 1, return CORE_ERROR,
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"XACTION ASNGW context already has been finalized");
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pool_final(>p_xact_pool);
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g_gtp_xact_initialized = 0;
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return CORE_OK;
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}
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2017-03-27 10:12:45 +00:00
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/**
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* Config Transaction
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*/
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void gtp_xact_config(gtp_xact_config_t *config, tm_service_t *tm_service,
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c_uintptr_t event, c_uint32_t duration, int retry_count)
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{
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memset(config, 0, sizeof(gtp_xact_config_t));
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config->g_xact_id = 1;
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config->tm_service = tm_service;
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config->event = event;;
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config->duration = duration;;
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config->retry_count = retry_count;;
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}
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2017-03-26 15:48:33 +00:00
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/**
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* Create a new transaction which was initiated by local ASN node.
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*/
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status_t gtp_xact_new_local(gtp_xact_config_t *config,
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gtp_xact_ctx_t **xact, c_uint8_t type, net_sock_t *sock,
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gtp_node_t *gnode, pkbuf_t *pkbuf)
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{
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gtp_xact_ctx_t *new = NULL;
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d_assert(xact, return CORE_ERROR, "Null param");
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d_assert(sock, return CORE_ERROR, "Null param");
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d_assert(gnode, return CORE_ERROR, "Null param");
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d_assert(pkbuf, return CORE_ERROR, "Null param");
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pool_alloc_node(>p_xact_pool, &new);
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d_assert(new, return CORE_ERROR, "Transaction allocation failed");
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memset(new, 0, sizeof(gtp_xact_ctx_t));
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new->xid = GTP_XACT_NEXT_ID(config->g_xact_id);
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new->org = GTP_LOCAL_ORIGINATOR;
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new->type = type;
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new->sock = sock;
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new->gnode = gnode;
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new->pkbuf = pkbuf;
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new->tm_wait = event_timer(config->tm_service, config->event,
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config->duration, (c_uintptr_t)new);
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d_assert(new->tm_wait, return CORE_ERROR, "Timer allocation failed");
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new->retry_count = config->retry_count;
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list_append(&gnode->local_xlist, new);
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*xact = new;
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2017-03-26 15:48:33 +00:00
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return CORE_OK;
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}
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/**
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* Create a new transaction which was initiated by remote node
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*/
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status_t gtp_xact_new_remote(gtp_xact_config_t *config,
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gtp_xact_ctx_t **xact, net_sock_t *sock, gtp_node_t *gnode, pkbuf_t *pkbuf)
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{
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gtpv2c_header_t *h = NULL;
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gtp_xact_ctx_t *new = NULL;
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d_assert(xact, return CORE_ERROR, "Null param");
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d_assert(sock, return CORE_ERROR, "Null param");
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d_assert(gnode, return CORE_ERROR, "Null param");
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d_assert(pkbuf, return CORE_ERROR, "Null param");
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d_assert(pkbuf->payload, return CORE_ERROR, "Null param");
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pool_alloc_node(>p_xact_pool, &new);
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d_assert(new, return CORE_ERROR, "Transaction allocation failed");
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memset(new, 0, sizeof(gtp_xact_ctx_t));
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h = pkbuf->payload;
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new->xid = GTP_SQN_TO_XID(h->sqn);
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new->org = GTP_REMOTE_ORIGINATOR;
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new->type = h->type;
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new->sock = sock;
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new->gnode = gnode;
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new->pkbuf = pkbuf;
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new->tm_wait = event_timer(config->tm_service, config->event,
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config->duration * config->retry_count, (c_uintptr_t)new);
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d_assert(new->tm_wait, return CORE_ERROR, "Timer allocation failed");
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new->retry_count = 1;
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list_append(&gnode->remote_xlist, new);
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*xact = new;
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2017-03-26 15:48:33 +00:00
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return CORE_OK;
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}
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/**
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* Delete a transaction
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*/
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status_t gtp_xact_delete(gtp_xact_ctx_t *xact)
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{
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d_assert(xact, return CORE_ERROR, "Null param");
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d_assert(xact->tm_wait, return CORE_ERROR, "Null param");
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d_assert(xact->gnode, return CORE_ERROR, "Null param");
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tm_delete(xact->tm_wait);
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list_remove(xact->org == GTP_LOCAL_ORIGINATOR ? &xact->gnode->local_xlist :
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&xact->gnode->remote_xlist, xact);
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pool_free_node(>p_xact_pool, xact);
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2017-03-26 15:48:33 +00:00
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return CORE_OK;
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}
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/**
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* Update the transaction with the new packet to be sent for the next step
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*/
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status_t gtp_xact_update_tx(gtp_xact_ctx_t *xact, pkbuf_t *pkb)
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{
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return CORE_OK;
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}
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/**
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* Update the transaction with the new received packet for the next step
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*/
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status_t gtp_xact_update_rx(gtp_xact_ctx_t *xact)
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{
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return CORE_OK;
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}
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/**
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* Apply and commit the updated of the transcation
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*/
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status_t gtp_xact_commit(gtp_xact_ctx_t *xact)
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{
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return CORE_OK;
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}
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/**
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* Find the transaction with the given ASN header
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*/
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2017-03-27 10:12:45 +00:00
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gtp_xact_ctx_t *gtp_xact_find(gtp_node_t *gnode, pkbuf_t *pkbuf)
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2017-03-26 15:48:33 +00:00
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{
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2017-03-27 10:12:45 +00:00
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gtpv2c_header_t *h = NULL;
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c_uint32_t xid;
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gtp_xact_ctx_t *xact = NULL;
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d_assert(gnode, return NULL, "Null param");
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d_assert(pkbuf, return NULL, "Null param");
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d_assert(pkbuf->payload, return NULL, "Null param");
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h = pkbuf->payload;
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switch(h->type)
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{
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case GTP_CREATE_SESSION_REQUEST_TYPE:
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case GTP_MODIFY_BEARER_REQUEST_TYPE:
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case GTP_DELETE_SESSION_REQUEST_TYPE:
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case GTP_CREATE_BEARER_REQUEST_TYPE:
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case GTP_UPDATE_BEARER_REQUEST_TYPE:
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case GTP_DELETE_BEARER_REQUEST_TYPE:
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case GTP_RELEASE_ACCESS_BEARERS_REQUEST_TYPE:
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case GTP_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_REQUEST_TYPE:
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case GTP_DELETE_INDIRECT_DATA_FORWARDING_TUNNEL_REQUEST_TYPE:
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xact = list_first(&gnode->local_xlist);
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break;
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case GTP_CREATE_SESSION_RESPONSE_TYPE:
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case GTP_MODIFY_BEARER_RESPONSE_TYPE:
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case GTP_DELETE_SESSION_RESPONSE_TYPE:
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case GTP_CREATE_BEARER_RESPONSE_TYPE:
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case GTP_UPDATE_BEARER_RESPONSE_TYPE:
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case GTP_DELETE_BEARER_RESPONSE_TYPE:
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case GTP_RELEASE_ACCESS_BEARERS_RESPONSE_TYPE:
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case GTP_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE:
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case GTP_DELETE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE:
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xact = list_first(&gnode->remote_xlist);
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break;
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default:
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d_error("Not implemented GTPv2 Message Type(%d)", h->type);
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return NULL;
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}
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xid = GTP_SQN_TO_XID(h->sqn);
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while(xact)
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{
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if (xact->xid == xid)
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break;
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xact = list_next(xact);
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}
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return xact;
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2017-03-26 15:48:33 +00:00
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}
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