165 lines
4.2 KiB
C
165 lines
4.2 KiB
C
#include "config.h"
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#include <linux/module.h>
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#include <linux/kthread.h>
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#include <net/ipv6.h>
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#include "capwap.h"
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#include "nlsmartcapwap.h"
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#include "netlinkapp.h"
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/* */
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static struct sc_capwap_session sc_acsession;
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/* */
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int sc_capwap_init(uint32_t threads) {
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TRACEKMOD("### sc_capwap_init\n");
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/* Init session */
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memset(&sc_localaddr, 0, sizeof(union capwap_addr));
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memset(&sc_acsession, 0, sizeof(struct sc_capwap_session));
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sc_capwap_initsession(&sc_acsession);
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/* Init sockect */
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return sc_socket_init();
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}
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/* */
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void sc_capwap_close(void) {
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TRACEKMOD("### sc_capwap_close\n");
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/* */
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sc_socket_close();
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sc_capwap_freesession(&sc_acsession);
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}
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/* */
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int sc_capwap_connect(const union capwap_addr* sockaddr, struct sc_capwap_sessionid_element* sessionid, uint16_t mtu) {
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TRACEKMOD("### sc_capwap_connect\n");
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if ((sc_localaddr.ss.ss_family != AF_INET) && (sc_localaddr.ss.ss_family != AF_INET6)) {
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return -ENONET;
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}
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/* AC address */
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if ((sockaddr->ss.ss_family == AF_INET6) && ipv6_addr_v4mapped(&sockaddr->sin6.sin6_addr)) {
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return -EINVAL;
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} else if ((sc_localaddr.ss.ss_family == AF_INET) && (sockaddr->ss.ss_family == AF_INET6)) {
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return -EINVAL;
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}
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/* */
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memcpy(&sc_acsession.peeraddr, sockaddr, sizeof(union capwap_addr));
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memcpy(&sc_acsession.sessionid, sessionid, sizeof(struct sc_capwap_sessionid_element));
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sc_acsession.mtu = mtu;
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return sc_capwap_sendkeepalive();
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}
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/* */
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void sc_capwap_resetsession(void) {
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sc_capwap_freesession(&sc_acsession);
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/* Reinit session */
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memset(&sc_localaddr, 0, sizeof(union capwap_addr));
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memset(&sc_acsession, 0, sizeof(struct sc_capwap_session));
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sc_capwap_initsession(&sc_acsession);
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}
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/* */
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int sc_capwap_sendkeepalive(void) {
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int ret;
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int length;
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uint8_t buffer[CAPWAP_KEEP_ALIVE_MAX_SIZE];
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TRACEKMOD("### sc_capwap_sendkeepalive\n");
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/* Build keepalive */
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length = sc_capwap_createkeepalive(&sc_acsession.sessionid, buffer, CAPWAP_KEEP_ALIVE_MAX_SIZE);
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/* Send packet */
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ret = sc_socket_send(SOCKET_UDP, buffer, length, &sc_acsession.peeraddr);
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if (ret > 0) {
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ret = 0;
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}
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return ret;
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}
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/* */
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struct sc_capwap_session* sc_capwap_getsession(const union capwap_addr* sockaddr) {
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TRACEKMOD("### sc_capwap_getsession\n");
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if (!sockaddr) {
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return &sc_acsession;
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} else if (sc_acsession.peeraddr.ss.ss_family == sockaddr->ss.ss_family) {
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if (sc_acsession.peeraddr.ss.ss_family == AF_INET) {
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if ((sc_acsession.peeraddr.sin.sin_port == sockaddr->sin.sin_port) && (sc_acsession.peeraddr.sin.sin_addr.s_addr == sockaddr->sin.sin_addr.s_addr)) {
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return &sc_acsession;
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}
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} else if (sc_acsession.peeraddr.ss.ss_family == AF_INET6) {
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if ((sc_acsession.peeraddr.sin6.sin6_port == sockaddr->sin6.sin6_port) && !ipv6_addr_cmp(&sc_acsession.peeraddr.sin6.sin6_addr, &sockaddr->sin6.sin6_addr)) {
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return &sc_acsession;
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}
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}
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}
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return NULL;
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}
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/* */
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void sc_capwap_recvpacket(struct sk_buff* skb) {
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union capwap_addr peeraddr;
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struct sc_capwap_session* session;
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TRACEKMOD("### sc_capwap_recvpacket\n");
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/* Get peer address */
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if (sc_socket_getpeeraddr(skb, &peeraddr)) {
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goto drop;
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}
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/* Get session */
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session = sc_capwap_getsession(&peeraddr);
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if (!session) {
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TRACEKMOD("*** Session not found\n");
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goto drop;
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}
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/* Remove UDP header */
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if (!skb_pull(skb, sizeof(struct udphdr))) {
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TRACEKMOD("*** Invalid packet\n");
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goto drop;
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}
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/* Parsing packet */
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if (sc_capwap_parsingpacket(session, &peeraddr, skb)) {
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TRACEKMOD("*** Parsing error\n");
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goto drop;
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}
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return;
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drop:
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kfree_skb(skb);
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}
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/* */
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struct sc_capwap_session* sc_capwap_recvunknownkeepalive(const union capwap_addr* sockaddr, struct sc_capwap_sessionid_element* sessionid) {
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TRACEKMOD("### sc_capwap_recvunknownkeepalive\n");
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return NULL;
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}
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/* */
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void sc_capwap_parsingdatapacket(struct sc_capwap_session* session, struct sk_buff* skb) {
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TRACEKMOD("### sc_capwap_parsingdatapacket\n");
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}
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/* */
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void sc_capwap_parsingmgmtpacket(struct sc_capwap_session* session, struct sk_buff* skb) {
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TRACEKMOD("### sc_capwap_parsingmgmtpacket\n");
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/* Send packet with capwap header into userspace */
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sc_netlink_notify_recv_data(skb->data, skb->len);
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}
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