actube/src/cw/cw_inline.c

209 lines
4.4 KiB
C
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#include "cw.h"
/**
* Get length wireless specific data
* @param th Pointer to packet
* @return length of wireless specific data
*
* Call this function only if the W flag is set
*/
int cw_get_hdr_ws_len(uint8_t * th)
{
if (!cw_get_hdr_flag_m(th)){
return *(th + 8);
}
return *(th + 9 + cw_get_hdr_rmac_len(th));
}
/**
* Get pointer to wireless specific data
* @param th Pointer to packet
* @return Pointer to data
*
* Call this function only if the W flag is set
*/
uint8_t *cw_get_hdr_ws_data(uint8_t * th)
{
if (!cw_get_hdr_flag_m(th))
return th + 9;
return (th + 10 + cw_get_hdr_rmac_len(th));
}
uint8_t * cw_get_hdr_payload_ptr(uint8_t *th)
{
return th+cw_get_hdr_msg_offset(th);
}
/**
* Set the HLEN field of a CAWAP Header
* @param th pointer to the header
* @param hlen value to set (Header Length)
*/
void cw_set_hdr_hlen(uint8_t * th, int hlen)
{
uint32_t d = cw_get_dword(th);
d &= (0x1f << 19) ^ 0xffffffff;
d |= ((hlen) & 0x1f) << 19;
cw_set_dword(th, d);
}
/**
* Set the WBID field of a CAWAP Header
* @param th pointer to the header
* @param wbid value to set (Wireless ID)
*/
void cw_set_hdr_wbid(uint8_t * th, int wbid)
{
uint32_t d = cw_get_dword(th);
d &= (0x1f << 9) ^ 0xffffffff;
d |= ((wbid) & 0x1f) << 9;
cw_set_dword(th, d);
}
/**
* Set the RID field of a CAWAP Header
* @param th pointer to the header
* @param rid value to set (Radio ID)
*/
void cw_set_hdr_rid(uint8_t * th, int rid)
{
uint32_t d = cw_get_dword(th);
d &= (0x1f << 14) ^ 0xffffffff;
d |= ((rid) & 0x1f) << 14;
cw_set_dword(th, d);
}
uint8_t *cw_get_hdr_msg_elems_ptr(uint8_t * m)
{
return cw_get_msg_elems_ptr(m + cw_get_hdr_msg_offset(m));
}
uint8_t *cw_get_hdr_msg_ptr(uint8_t * rawmsg)
{
return rawmsg + cw_get_hdr_msg_offset(rawmsg);
}
int cw_get_hdr_msg_total_len(uint8_t * rawmsg)
{
int offset = cw_get_hdr_msg_offset(rawmsg);
return offset + cw_get_msg_elems_len(rawmsg + offset) + 8;
}
int cw_set_hdr_rmac(uint8_t * th, bstr_t rmac)
{
int rmac_len;
int hlen;
if (!rmac) {
cw_set_hdr_flags(th, CAPWAP_FLAG_HDR_M, 0);
cw_set_hdr_hlen(th, 2);
return 0;
}
rmac_len = bstr_len(rmac);
memcpy(cw_get_hdr_rmac(th), rmac, rmac_len + 1);
cw_set_hdr_flags(th, CAPWAP_FLAG_HDR_M, 1);
hlen = 4 + rmac_len / 4;
if (rmac_len % 4 != 0) {
hlen++;
}
cw_set_hdr_hlen(th, hlen);
return 1;
}
/**
* Put a message element header for a message to contain a vendor specific payload
* @param dst pointer to destination buffer
* @param vendorid vendorid
* @param elemid element id of vendor specific data
* @len length of vendor specific data
* @return the number of bytes put (always 10)
*/
int cw_put_elem_vendor_hdr(uint8_t * dst, uint32_t vendorid,
uint16_t elemid, uint16_t len)
{
cw_set_elem_hdr(dst, CAPWAP_ELEM_VENDOR_SPECIFIC_PAYLOAD, len + 6);
cw_set_dword(dst + 4, vendorid);
cw_set_word(dst + 8, elemid);
return 10;
}
/**
* Add a message element to a buffer
* @param dst pointer to buffer
* @type message element type
* @data pointer to data
* @length of message element
* @return the number of bytes put
*/
int cw_addelem(uint8_t * dst, uint16_t type, uint8_t * data, uint16_t len)
{
int l = cw_put_elem_hdr(dst, type, len);
return l + cw_put_data(dst + l, data, len);
}
int cw_addelem_bstr(uint8_t * dst, uint16_t type, const bstr_t bstr)
{
return cw_addelem(dst, type, bstr_data(bstr), bstr_len(bstr));
}
int cw_put_elem_result_code(uint8_t * dst, uint32_t code)
{
cw_set_dword(dst + 4, code);
return 4 + cw_put_elem_hdr(dst, CAPWAP_ELEM_RESULT_CODE, 4);
}
/*
int cw_put_version(uint8_t * dst, uint16_t subelem_id, bstrv_t v)
{
uint8_t *d = dst;
d += cw_put_dword(d, bstrv_get_vendor_id(v));
d += cw_put_dword(d, (subelem_id << 16) | bstrv_len(v));
d += cw_put_data(d, bstrv_data(v), bstrv_len(v));
return d - dst;
}
*/
int cw_put_elem_radio_operational_state(uint8_t * dst, int rid, int state, int cause) {
cw_set_byte(dst+4,rid);
cw_set_byte(dst+5,state);
cw_set_byte(dst+6,cause);
return 3+cw_put_elem_hdr(dst,CW_ELEM_RADIO_OPERATIONAL_STATE,3);
}
int cw_put_elem_radio_administrative_state(uint8_t * dst, int rid, int state) {
cw_set_byte(dst+4,rid);
cw_set_byte(dst+5,state);
return 2+cw_put_elem_hdr(dst,CAPWAP_ELEM_RADIO_ADMINISTRATIVE_STATE,2);
}
int cw_put_elem_session_id(uint8_t *dst, uint8_t *session_id, int len){
memcpy(dst+4,session_id,len);
return len+cw_put_elem_hdr(dst,CAPWAP_ELEM_SESSION_ID,len);
}