40 lines
892 B
C
40 lines
892 B
C
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#include <sys/socket.h>
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#include "dbg.h"
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#include "cw.h"
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/**
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* @brief Detect NAT after a join/discovery request
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* @param conn Connection object
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* @retval 1 NAT detected
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* @retval 0 no NAT was detected
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*/
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int cw_detect_nat(struct conn *conn)
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{
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cw_KTV_t * result;
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char local_str[128];
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char remote_str[128];
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result = cw_ktv_get(conn->remote_cfg,"capwap-local-ip-address",CW_TYPE_IPADDRESS);
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if (result == NULL){
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cw_dbg(DBG_WARN,"Can't detect NAT. No local IP from peer received.");
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return 0;
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}
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/* convert remote connected and sent ip addresse to
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* strings */
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sock_addrtostr((struct sockaddr*)&conn->addr,local_str,128,0);
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result->type->to_str(result,remote_str,128);
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/* if connected and sent address is the same, there is
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* no NAT */
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if (strcmp(remote_str,local_str)==0)
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return 0;
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/* otherwise ther must be something between AC and WTP */
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return 1;
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}
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