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wtp: rework kernel socket handling

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Switch to a connected UDP kernel socket. Comparing the
local and remote IPs is no longer required and handling
different IP versions and UDP types is automatic.

The WTP logic needs to reopen the socket on demand now.
This commit is contained in:
Andreas Schultz
2016-02-18 15:06:39 +01:00
parent cae859e42f
commit a6d0efe91a
10 changed files with 196 additions and 479 deletions
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38
src/wtp/kmod/capwap.h
View File

@ -1,8 +1,12 @@
#ifndef __KMOD_CAPWAP_HEADER__
#define __KMOD_CAPWAP_HEADER__
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/skbuff.h>
#include "capwap_rfc.h"
#include "socket.h"
/* */
#define MAX_MTU 9000
@ -30,6 +34,14 @@
#define SKB_CAPWAP_FLAG_WIRELESSINFORMATION 0x0800
#define SKB_CAPWAP_FLAG_FRAGMENT 0x1000
/* Universal socket address */
union capwap_addr {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr_storage ss;
};
struct sc_skb_capwap_cb {
uint16_t flags;
@ -79,32 +91,28 @@ struct sc_capwap_fragment_queue {
struct sc_capwap_session {
struct net *net;
struct socket *socket;
uint16_t mtu;
union capwap_addr peeraddr;
struct sc_capwap_sessionid_element sessionid;
uint16_t fragmentid;
spinlock_t fragmentid_lock;
atomic_t fragmentid;
struct sc_capwap_fragment_queue fragments;
};
/* */
extern union capwap_addr sc_localaddr;
/* Dipendent implementation function */
void sc_capwap_recvpacket(struct sk_buff* skb);
struct sc_capwap_session* sc_capwap_recvunknownkeepalive(const union capwap_addr* sockaddr, const struct sc_capwap_sessionid_element* sessionid);
int sc_capwap_recvpacket(struct sock *sk, struct sk_buff* skb);
struct sc_capwap_session* sc_capwap_recvunknownkeepalive(struct sc_capwap_session* session,
const struct sc_capwap_sessionid_element* sessionid);
void sc_capwap_parsingdatapacket(struct sc_capwap_session* session, struct sk_buff* skb);
void sc_capwap_parsingmgmtpacket(struct sc_capwap_session* session, struct sk_buff* skb);
/* Indipendent implementation function */
int sc_capwap_bind(struct net *net, union capwap_addr* sockaddr);
void sc_capwap_initsession(struct sc_capwap_session* session);
void sc_capwap_freesession(struct sc_capwap_session* session);
uint16_t sc_capwap_newfragmentid(struct sc_capwap_session* session);
int sc_capwap_bind(struct sc_capwap_session *session, int protocol,
struct sockaddr_storage *sockaddr);
int sc_capwap_send(struct sc_capwap_session *session, uint8_t* buffer, int length);
void sc_capwap_close(struct sc_capwap_session *session);
int sc_capwap_8023_to_80211(struct sk_buff* skb, const uint8_t* bssid);
int sc_capwap_80211_to_8023(struct sk_buff* skb);
@ -112,7 +120,7 @@ int sc_capwap_80211_to_8023(struct sk_buff* skb);
void sc_capwap_sessionid_printf(const struct sc_capwap_sessionid_element* sessionid, char* string);
int sc_capwap_createkeepalive(struct sc_capwap_sessionid_element* sessionid, uint8_t* buffer, int size);
int sc_capwap_parsingpacket(struct sc_capwap_session* session, const union capwap_addr* sockaddr, struct sk_buff* skb);
int sc_capwap_parsingpacket(struct sc_capwap_session* session, struct sk_buff* skb);
struct sc_capwap_radio_addr* sc_capwap_setradiomacaddress(uint8_t* buffer, int size, uint8_t* bssid);
struct sc_capwap_wireless_information* sc_capwap_setwinfo_frameinfo(uint8_t* buffer, int size, uint8_t rssi, uint8_t snr, uint16_t rate);