201 lines
3.8 KiB
C
201 lines
3.8 KiB
C
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#include <netdb.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include "cw/capwap.h"
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#include "cw/conn.h"
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#include "cw/sock.h"
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#include "cw/ktv.h"
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#include "cw/log.h"
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#include "cw/dbg.h"
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#include "cw/timer.h"
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#include "cw/cw.h"
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#include "wtp.h"
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static int run_discovery(struct conn *conn)
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{
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/*// conn->incomming = mbag_create();*/
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time_t timer;
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uint8_t dtype=0;
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conn->capwap_state = CAPWAP_STATE_DISCOVERY;
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/*cw_ktv_add(conn->local_cfg, "discovery-type", CW_TYPE_BYTE, &dtype,17);*/
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cw_init_request(conn, CAPWAP_MSG_DISCOVERY_REQUEST);
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cw_put_msg(conn, conn->req_buffer);
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conn_send_msg(conn, conn->req_buffer);
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timer = cw_timer_start(0);
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while (!cw_timer_timeout(timer)
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&& conn->capwap_state == CAPWAP_STATE_DISCOVERY) {
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int rc;
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/*mavl_del_all(conn->incomming);*/
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rc = cw_read_from(conn);
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if (rc<0) {
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if (errno==EAGAIN)
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continue;
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cw_log(LOG_ERROR,"Error reading messages: %s",strerror(errno));
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break;
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}
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}
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/*
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mbag_t discs;
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discs = mbag_get_mavl(conn->remote, CW_ITEM_DISCOVERIES);
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if (!discs) {
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cw_log(LOG_ERR,"No discovery responses received");
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return 0;
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}
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int i;
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cw_aciplist_t list = cw_select_ac(conn, discs);
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DEFINE_AVLITER(ii,list);
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avliter_foreach(&ii){
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cw_acip_t * ip = avliter_get(&ii);
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}
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mavl_del_all(conn->remote);
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mbag_set_mavl(conn->local,CW_ITEM_CAPWAP_CONTROL_IP_ADDRESS_LIST,list);
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*/
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return 1;
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}
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/**
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* Run discovery for on address (eg broadcast 255.255.255.255)
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*/
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int cw_run_discovery(struct conn *conn, const char *addr, const char *bindaddr)
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{
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char sock_buf[SOCK_ADDR_BUFSIZE];
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struct sockaddr_storage dstaddr;
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char caddr[256], control_port[64];
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int rc;
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/* get addr of destination */
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struct addrinfo hints;
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struct addrinfo *res, *res0;
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memset(&hints, 0, sizeof(hints));
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_family = AF_UNSPEC;
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strncpy(caddr, addr, sizeof(caddr));
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/* try to convert the given address string to sockaddr */
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rc = sock_strtoaddr(caddr,(struct sockaddr*)&dstaddr);
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if (rc) {
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int iport;
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/* converting to socaddr was successful */
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iport = sock_getport((struct sockaddr*)&dstaddr);
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if (iport != 0)
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sprintf(control_port, "%d", iport);
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else
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sprintf(control_port,"%d", CAPWAP_CONTROL_PORT);
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}
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else{
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char * port;
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/* converting went wrong, so the address string might
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* be a DNS entry. Look for a colon to find the port. */
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port = strchr(addr,':');
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if (port){
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strncpy(control_port,port+1,sizeof(control_port));
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caddr[port-addr]=0;
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}
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else{
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sprintf(control_port,"%d", CAPWAP_CONTROL_PORT);
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}
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}
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/*printf("Addr: %s, Port: %s\n",caddr,control_port);*/
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rc = getaddrinfo(caddr, control_port, &hints, &res0);
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if (rc) {
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cw_log(LOG_ERR, "Can't connect to AC %s: %s", caddr, gai_strerror(rc));
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return 0;
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}
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for (res = res0; res; res = res->ai_next) {
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int sockfd;
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int opt;
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sockfd = socket(res->ai_family, SOCK_DGRAM, 0);
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if (sockfd == -1) {
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cw_log(LOG_ERR, "Can't create socket for %s: %s", caddr,
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strerror(errno));
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continue;
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}
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opt = 1;
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if (setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &opt, sizeof(opt)) < 0) {
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cw_log(LOG_ERR, "Can't set broadcast sockopt");
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}
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sock_set_recvtimeout(sockfd, 1);
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sock_set_dontfrag(sockfd, 0);
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sock_copyaddr(&conn->addr, res->ai_addr);
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if (bindaddr){
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int brc;
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struct sockaddr bind_address;
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sock_strtoaddr(bindaddr,&bind_address);
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brc = bind(sockfd,&bind_address,sock_addrlen(&bind_address));
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if (brc<0) {
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cw_log(LOG_ERR,"Can't bind to %s",sock_addr2str(&bind_address,sock_buf));
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return 0;
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}
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}
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conn->sock = sockfd;
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conn->readfrom = conn_recvfrom_packet;
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cw_dbg(DBG_INFO,"Discovery to %s", sock_addr2str_p(&conn->addr,sock_buf));
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run_discovery(conn);
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conn->readfrom=NULL;
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close(sockfd);
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}
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freeaddrinfo(res0);
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return 0;
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}
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