diff options
Diffstat (limited to 'sys/netatm/uni/sscop_upper.c')
| -rw-r--r-- | sys/netatm/uni/sscop_upper.c | 421 |
1 files changed, 0 insertions, 421 deletions
diff --git a/sys/netatm/uni/sscop_upper.c b/sys/netatm/uni/sscop_upper.c deleted file mode 100644 index 3e7d0b0..0000000 --- a/sys/netatm/uni/sscop_upper.c +++ /dev/null @@ -1,421 +0,0 @@ -/*- - * =================================== - * HARP | Host ATM Research Platform - * =================================== - * - * - * This Host ATM Research Platform ("HARP") file (the "Software") is - * made available by Network Computing Services, Inc. ("NetworkCS") - * "AS IS". NetworkCS does not provide maintenance, improvements or - * support of any kind. - * - * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED, - * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE - * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE. - * In no event shall NetworkCS be responsible for any damages, including - * but not limited to consequential damages, arising from or relating to - * any use of the Software or related support. - * - * Copyright 1994-1998 Network Computing Services, Inc. - * - * Copies of this Software may be made, however, the above copyright - * notice must be reproduced on all copies. - */ - -/* - * ATM Forum UNI Support - * --------------------- - * - * SSCOP - CPCS SAP interface processing - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/types.h> -#include <sys/systm.h> -#include <sys/time.h> -#include <sys/socket.h> -#include <sys/socketvar.h> -#include <sys/syslog.h> -#include <net/if.h> -#include <netatm/port.h> -#include <netatm/queue.h> -#include <netatm/atm.h> -#include <netatm/atm_sys.h> -#include <netatm/atm_sap.h> -#include <netatm/atm_cm.h> -#include <netatm/atm_if.h> -#include <netatm/atm_stack.h> -#include <netatm/atm_pcb.h> -#include <netatm/atm_var.h> - -#include <netatm/uni/sscop.h> -#include <netatm/uni/sscop_misc.h> -#include <netatm/uni/sscop_pdu.h> -#include <netatm/uni/sscop_var.h> - -/* - * Local functions - */ -static caddr_t sscop_pdu_receive(KBuffer *, struct sscop *, int *); - - -/* - * Local variables - */ -static union { - struct bgn_pdu t_bgn; - struct bgak_pdu t_bgak; - struct end_pdu t_end; - struct endak_q2110_pdu t_endak_q2110; - struct endak_qsaal_pdu t_endak_qsaal; - struct rs_pdu t_rs; - struct rsak_q2110_pdu t_rsak_q2110; - struct rsak_qsaal_pdu t_rsak_qsaal; - struct bgrej_pdu t_bgrej; - struct sd_pdu t_sd; - struct sdp_pdu t_sdp; - struct er_pdu t_er; - struct poll_pdu t_poll; - struct stat_pdu t_stat; - struct ustat_pdu t_ustat; - struct ud_pdu t_ud; - struct md_pdu t_md; - struct erak_pdu t_erak; -} sscop_trailer; - - -/* - * PDU length validation table - */ -struct pdulen { - int min; - int max; -}; - -static struct pdulen qsaal_pdulen[] = { - {0, 0}, - {sizeof(struct bgn_pdu), sizeof(struct bgn_pdu)}, - {sizeof(struct bgak_pdu), sizeof(struct bgak_pdu)}, - {sizeof(struct end_pdu), sizeof(struct end_pdu)}, - {sizeof(struct endak_qsaal_pdu),sizeof(struct endak_qsaal_pdu)}, - {sizeof(struct rs_pdu), sizeof(struct rs_pdu)}, - {sizeof(struct rsak_qsaal_pdu), sizeof(struct rsak_qsaal_pdu)}, - {sizeof(struct bgrej_pdu), sizeof(struct bgrej_pdu)}, - {sizeof(struct sd_pdu), sizeof(struct sd_pdu) + PDU_MAX_INFO}, - {sizeof(struct sdp_pdu), sizeof(struct sdp_pdu) + PDU_MAX_INFO}, - {sizeof(struct poll_pdu), sizeof(struct poll_pdu)}, - {sizeof(struct stat_pdu), sizeof(struct stat_pdu) + PDU_MAX_STAT}, - {sizeof(struct ustat_pdu), sizeof(struct ustat_pdu)}, - {sizeof(struct ud_pdu), sizeof(struct ud_pdu) + PDU_MAX_INFO}, - {sizeof(struct md_pdu), sizeof(struct md_pdu) + PDU_MAX_INFO}, - {0, 0} -}; - -static struct pdulen q2110_pdulen[] = { - {0, 0}, - {sizeof(struct bgn_pdu), sizeof(struct bgn_pdu) + PDU_MAX_UU}, - {sizeof(struct bgak_pdu), sizeof(struct bgak_pdu) + PDU_MAX_UU}, - {sizeof(struct end_pdu), sizeof(struct end_pdu) + PDU_MAX_UU}, - {sizeof(struct endak_q2110_pdu),sizeof(struct endak_q2110_pdu)}, - {sizeof(struct rs_pdu), sizeof(struct rs_pdu) + PDU_MAX_UU}, - {sizeof(struct rsak_q2110_pdu), sizeof(struct rsak_q2110_pdu)}, - {sizeof(struct bgrej_pdu), sizeof(struct bgrej_pdu) + PDU_MAX_UU}, - {sizeof(struct sd_pdu), sizeof(struct sd_pdu) + PDU_MAX_INFO}, - {sizeof(struct er_pdu), sizeof(struct er_pdu)}, - {sizeof(struct poll_pdu), sizeof(struct poll_pdu)}, - {sizeof(struct stat_pdu), sizeof(struct stat_pdu) + PDU_MAX_STAT}, - {sizeof(struct ustat_pdu), sizeof(struct ustat_pdu)}, - {sizeof(struct ud_pdu), sizeof(struct ud_pdu) + PDU_MAX_INFO}, - {sizeof(struct md_pdu), sizeof(struct md_pdu) + PDU_MAX_INFO}, - {sizeof(struct erak_pdu), sizeof(struct erak_pdu)} -}; - - -/* - * PDUs with Pad Length Fields - */ -static u_char qsaal_padlen[] = { - 0, /* --- */ - 0, /* BGN */ - 0, /* BGAK */ - 0, /* END */ - 0, /* ENDAK */ - 0, /* RS */ - 0, /* RSAK */ - 0, /* BGREJ */ - 1, /* SD */ - 1, /* SDP */ - 0, /* POLL */ - 0, /* STAT */ - 0, /* USTAT */ - 1, /* UD */ - 1, /* MD */ - 0 /* --- */ -}; - -static u_char q2110_padlen[] = { - 0, /* --- */ - 1, /* BGN */ - 1, /* BGAK */ - 1, /* END */ - 0, /* ENDAK */ - 1, /* RS */ - 0, /* RSAK */ - 1, /* BGREJ */ - 1, /* SD */ - 0, /* ER */ - 0, /* POLL */ - 0, /* STAT */ - 0, /* USTAT */ - 1, /* UD */ - 1, /* MD */ - 0 /* ERAK */ -}; - - -/* - * SSCOP Upper Stack Command Handler - * - * This function will receive all of the stack commands issued from the - * layer below SSCOP (ie. CPCS). Currently, only incoming PDUs will be - * received here. The appropriate processing function will be determined - * based on the received PDU type and the current sscop control block state. - * - * Arguments: - * cmd stack command code - * tok session token - * arg1 command specific argument - * arg2 command specific argument - * - * Returns: - * none - * - */ -void -sscop_upper(cmd, tok, arg1, arg2) - int cmd; - void *tok; - intptr_t arg1; - intptr_t arg2; -{ - struct sscop *sop = (struct sscop *)tok; - void (**ptab)(struct sscop *, KBuffer *, caddr_t); - void (*func)(struct sscop *, KBuffer *, caddr_t); - caddr_t trlr; - int type; - - ATM_DEBUG5("sscop_upper: cmd=0x%x, sop=%p, state=%d, arg1=%p, arg2=%p\n", - cmd, sop, sop->so_state, (void *)arg1, (void *)arg2); - - switch (cmd) { - - case CPCS_UNITDATA_SIG: - /* - * Decode/validate received PDU - */ - trlr = sscop_pdu_receive((KBuffer *)arg1, sop, &type); - if (trlr == NULL) { - return; - } - - /* - * Validate sscop state - */ - if (sop->so_state > SOS_MAXSTATE) { - log(LOG_ERR, - "sscop_upper: invalid state sop=%p, state=%d\n", - sop, sop->so_state); - KB_FREEALL((KBuffer *)arg1); - return; - } - - /* - * Call event processing function - */ - ptab = sop->so_vers == SSCOP_VERS_QSAAL ? - sscop_qsaal_pdutab[type]: - sscop_q2110_pdutab[type]; - func = ptab[sop->so_state]; - if (func == NULL) { - log(LOG_ERR, - "sscop_upper: unsupported pdu=%d, state=%d\n", - type, sop->so_state); - break; - } - (*func)(sop, (KBuffer *)arg1, trlr); - break; - - default: - log(LOG_ERR, "sscop_upper: unknown cmd 0x%x, sop=%p\n", - cmd, sop); - } - - return; -} - - -/* - * Decode and Validate Received PDU - * - * This function will process all received SSCOP PDUs. The PDU type will be - * determined and PDU format validation will be performed. If the PDU is - * successfully decoded and validated, the buffer chain will have the PDU - * trailer removed, but any resultant zero-length buffers will NOT be freed. - * If the PDU fails validation, then the buffer chain will be freed. - * - * Arguments: - * m pointer to PDU buffer chain - * sop pointer to sscop connection block - * typep address to store PDU type - * - * Returns: - * addr pointer to (contiguous) PDU trailer - * 0 invalid PDU, buffer chain freed - * - */ -static caddr_t -sscop_pdu_receive(m, sop, typep) - KBuffer *m; - struct sscop *sop; - int *typep; -{ - KBuffer *m0, *ml, *mn; - caddr_t cp, tp; - int len, tlen, type, plen; - - /* - * Calculate PDU length and find the last two buffers in the chain - */ - len = 0; - for (m0 = m, ml = mn = NULL; m0; m0 = KB_NEXT(m0)) { - len += KB_LEN(m0); - mn = ml; - ml = m0; - } - - /* - * Make sure we've got a minimum sized PDU - */ - if (len < PDU_MIN_LEN) - goto badpdu; - - /* - * Get PDU type field - */ - if (KB_LEN(ml) >= PDU_MIN_LEN) { - KB_DATAEND(ml, tp, caddr_t); - tp -= PDU_MIN_LEN; - } else { - KB_DATAEND(mn, tp, caddr_t); - tp -= (PDU_MIN_LEN - KB_LEN(ml)); - } - *typep = type = *tp & PT_TYPE_MASK; - - /* - * Check up on PDU length - */ - if (sop->so_vers == SSCOP_VERS_QSAAL) { - if ((len < (tlen = qsaal_pdulen[type].min)) || - (len > qsaal_pdulen[type].max) || - (len & PDU_LEN_MASK)) - goto badpdu; - } else { - if ((len < (tlen = q2110_pdulen[type].min)) || - (len > q2110_pdulen[type].max) || - (len & PDU_LEN_MASK)) - goto badpdu; - } - - /* - * Get a contiguous, aligned PDU trailer and adjust buffer - * controls to remove trailer - */ - if (KB_LEN(ml) >= tlen) { - /* - * Trailer is contained in last buffer - */ - KB_TAILADJ(ml, -tlen); - KB_DATAEND(ml, cp, caddr_t); - if ((intptr_t)cp & PDU_ADDR_MASK) { - /* - * Trailer not aligned in buffer, use local memory - */ - bcopy(cp, (caddr_t)&sscop_trailer, tlen); - cp = (caddr_t)&sscop_trailer; - } - } else { - /* - * Trailer is split across buffers, use local memory - */ - caddr_t cp1; - int off = tlen - KB_LEN(ml); - - cp = (caddr_t)&sscop_trailer; - - /* - * Ensure trailer is within last two buffers - */ - if ((mn == NULL) || (KB_LEN(mn) < off)) - goto badpdu; - - KB_DATASTART(ml, cp1, caddr_t); - bcopy(cp1, cp + off, KB_LEN(ml)); - KB_LEN(ml) = 0; - KB_TAILADJ(mn, -off); - KB_DATAEND(mn, cp1, caddr_t); - bcopy(cp1, cp, off); - } - - /* - * Get possible PDU Pad Length - */ - if (sop->so_vers == SSCOP_VERS_QSAAL) { - if (qsaal_padlen[type]) - plen = (*tp & PT_PAD_MASK) >> PT_PAD_SHIFT; - else - plen = 0; - } else { - if (q2110_padlen[type]) - plen = (*tp & PT_PAD_MASK) >> PT_PAD_SHIFT; - else - plen = 0; - } - - /* - * Perform Pad Length adjustments - */ - if (plen) { - if (KB_LEN(ml) >= plen) { - /* - * All pad bytes in last buffer - */ - KB_TAILADJ(ml, -plen); - } else { - /* - * Pad bytes split between buffers - */ - plen -= KB_LEN(ml); - if ((mn == NULL) || (KB_LEN(mn) < plen)) - goto badpdu; - KB_LEN(ml) = 0; - KB_TAILADJ(mn, -plen); - } - } - - return (cp); - -badpdu: - /* - * This MAA Error is only supposed to be for a PDU length violation, - * but we use it for any PDU format error. - */ - sscop_maa_error(sop, 'U'); - sscop_pdu_print(sop, m, "badpdu received"); - KB_FREEALL(m); - return (NULL); -} - |
