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    SubjectRe: [PATCH] X25: Add ITU-T facilites
    From
    Date
    Structure alignment corrected.

    Adds options for ITU DTE facilities to X.25, called address extension and calling address extension

    Signed-off-by: Andrew Hendry <ahendry@tusc.com.au>


    diff -uprN -X dontdiff linux-2.6.13.4-vanilla/include/linux/x25.h linux-2.6.13.4/include/linux/x25.h
    --- linux-2.6.13.4-vanilla/include/linux/x25.h 2005-10-11 04:54:29.000000000 +1000
    +++ linux-2.6.13.4/include/linux/x25.h 2005-10-21 09:20:53.000000000 +1000
    @@ -11,6 +11,8 @@
    #ifndef X25_KERNEL_H
    #define X25_KERNEL_H

    +#include <linux/types.h>
    +
    #define SIOCX25GSUBSCRIP (SIOCPROTOPRIVATE + 0)
    #define SIOCX25SSUBSCRIP (SIOCPROTOPRIVATE + 1)
    #define SIOCX25GFACILITIES (SIOCPROTOPRIVATE + 2)
    @@ -21,6 +23,8 @@
    #define SIOCX25SCUDMATCHLEN (SIOCPROTOPRIVATE + 7)
    #define SIOCX25CALLACCPTAPPRV (SIOCPROTOPRIVATE + 8)
    #define SIOCX25SENDCALLACCPT (SIOCPROTOPRIVATE + 9)
    +#define SIOCX25GDTEFACILITIES (SIOCPROTOPRIVATE + 10)
    +#define SIOCX25SDTEFACILITIES (SIOCPROTOPRIVATE + 11)

    /*
    * Values for {get,set}sockopt.
    @@ -77,6 +81,8 @@ struct x25_subscrip_struct {
    #define X25_MASK_PACKET_SIZE 0x04
    #define X25_MASK_WINDOW_SIZE 0x08

    +#define X25_MASK_CALLING_AE 0x10
    +#define X25_MASK_CALLED_AE 0x20


    /*
    @@ -98,6 +104,26 @@ struct x25_facilities {
    unsigned int reverse;
    };

    +/*
    +* ITU DTE facilities
    +* Only the called and calling address
    +* extension are currently implemented.
    +* The rest are in place to avoid the struct
    +* changing size if someone needs them later
    +*/
    +
    +struct x25_dte_facilities {
    + __u16 delay_cumul;
    + __u16 delay_target;
    + __u16 delay_max;
    + __u8 min_throughput;
    + __u8 expedited;
    + __u8 calling_len;
    + __u8 called_len;
    + __u8 calling_ae[20];
    + __u8 called_ae[20];
    +};
    +
    /*
    * Call User Data structure.
    */
    diff -uprN -X dontdiff linux-2.6.13.4-vanilla/include/net/x25.h linux-2.6.13.4/include/net/x25.h
    --- linux-2.6.13.4-vanilla/include/net/x25.h 2005-10-11 04:54:29.000000000 +1000
    +++ linux-2.6.13.4/include/net/x25.h 2005-10-21 09:20:16.000000000 +1000
    @@ -101,9 +101,16 @@ enum {
    #define X25_FAC_PACKET_SIZE 0x42
    #define X25_FAC_WINDOW_SIZE 0x43

    -#define X25_MAX_FAC_LEN 20 /* Plenty to spare */
    +#define X25_MAX_FAC_LEN 60
    #define X25_MAX_CUD_LEN 128

    +#define X25_FAC_CALLING_AE 0xCB
    +#define X25_FAC_CALLED_AE 0xC9
    +
    +#define X25_MARKER 0x00
    +#define X25_DTE_SERVICES 0x0F
    +#define X25_MAX_AE_LEN 32
    +
    /**
    * struct x25_route - x25 routing entry
    * @node - entry in x25_list_lock
    @@ -148,6 +155,7 @@ struct x25_sock {
    struct timer_list timer;
    struct x25_causediag causediag;
    struct x25_facilities facilities;
    + struct x25_dte_facilities dte_facilities;
    struct x25_calluserdata calluserdata;
    unsigned long vc_facil_mask; /* inc_call facilities mask */
    };
    @@ -180,9 +188,9 @@ extern void x25_establish_link(struct x2
    extern void x25_terminate_link(struct x25_neigh *);

    /* x25_facilities.c */
    -extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, unsigned long *);
    -extern int x25_create_facilities(unsigned char *, struct x25_facilities *, unsigned long);
    -extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, struct x25_facilities *);
    +extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, struct x25_dte_facilities *, unsigned long *);
    +extern int x25_create_facilities(unsigned char *, struct x25_facilities *, struct x25_dte_facilities *, unsigned long);
    +extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, struct x25_facilities *, struct x25_dte_facilities *);
    extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *);

    /* x25_in.c */
    diff -uprN -X dontdiff linux-2.6.13.4-vanilla/net/x25/af_x25.c linux-2.6.13.4/net/x25/af_x25.c
    --- linux-2.6.13.4-vanilla/net/x25/af_x25.c 2005-10-11 04:54:29.000000000 +1000
    +++ linux-2.6.13.4/net/x25/af_x25.c 2005-10-21 09:20:16.000000000 +1000
    @@ -513,6 +513,13 @@ static int x25_create(struct socket *soc
    x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE;
    x25->facilities.throughput = X25_DEFAULT_THROUGHPUT;
    x25->facilities.reverse = X25_DEFAULT_REVERSE;
    + x25->dte_facilities.calling_len = 0;
    + x25->dte_facilities.called_len = 0;
    + memset(x25->dte_facilities.called_ae, '\0',
    + sizeof(x25->dte_facilities.called_ae));
    + memset(x25->dte_facilities.calling_ae, '\0',
    + sizeof(x25->dte_facilities.calling_ae));
    +
    rc = 0;
    out:
    return rc;
    @@ -554,6 +561,7 @@ static struct sock *x25_make_new(struct
    x25->t2 = ox25->t2;
    x25->facilities = ox25->facilities;
    x25->qbitincl = ox25->qbitincl;
    + x25->dte_facilities = ox25->dte_facilities;
    x25->cudmatchlength = ox25->cudmatchlength;
    x25->accptapprv = ox25->accptapprv;

    @@ -833,6 +841,7 @@ int x25_rx_call_request(struct sk_buff *
    struct x25_sock *makex25;
    struct x25_address source_addr, dest_addr;
    struct x25_facilities facilities;
    + struct x25_dte_facilities dte_facilities;
    int len, rc;

    /*
    @@ -869,7 +878,8 @@ int x25_rx_call_request(struct sk_buff *
    /*
    * Try to reach a compromise on the requested facilities.
    */
    - if ((len = x25_negotiate_facilities(skb, sk, &facilities)) == -1)
    + if ((len = x25_negotiate_facilities(skb, sk, &facilities,
    + &dte_facilities)) == -1)
    goto out_sock_put;

    /*
    @@ -900,9 +910,12 @@ int x25_rx_call_request(struct sk_buff *
    makex25->source_addr = source_addr;
    makex25->neighbour = nb;
    makex25->facilities = facilities;
    + makex25->dte_facilities= dte_facilities;
    makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask;
    /* ensure no reverse facil on accept */
    makex25->vc_facil_mask &= ~X25_MASK_REVERSE;
    + /* ensure no calling address extension on accept */
    + makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE;
    makex25->cudmatchlength = x25_sk(sk)->cudmatchlength;

    /* Normally all calls are accepted immediatly */
    @@ -1309,6 +1322,34 @@ static int x25_ioctl(struct socket *sock
    break;
    }

    + case SIOCX25GDTEFACILITIES: {
    + rc = copy_to_user(argp, &x25->dte_facilities,
    + sizeof(x25->dte_facilities)) ? -EFAULT : 0;
    + break;
    + }
    +
    + case SIOCX25SDTEFACILITIES: {
    + struct x25_dte_facilities dtefacs;
    + rc = -EFAULT;
    + if (copy_from_user(&dtefacs, argp, sizeof(dtefacs)))
    + break;
    + rc = -EINVAL;
    + if (sk->sk_state != TCP_LISTEN &&
    + sk->sk_state != TCP_CLOSE)
    + break;
    + if (dtefacs.calling_len > X25_MAX_AE_LEN)
    + break;
    + if (dtefacs.calling_ae == NULL)
    + break;
    + if (dtefacs.called_len > X25_MAX_AE_LEN)
    + break;
    + if (dtefacs.called_ae == NULL)
    + break;
    + x25->dte_facilities = dtefacs;
    + rc = 0;
    + break;
    + }
    +
    case SIOCX25GCALLUSERDATA: {
    struct x25_calluserdata cud = x25->calluserdata;
    rc = copy_to_user(argp, &cud,
    diff -uprN -X dontdiff linux-2.6.13.4-vanilla/net/x25/x25_facilities.c linux-2.6.13.4/net/x25/x25_facilities.c
    --- linux-2.6.13.4-vanilla/net/x25/x25_facilities.c 2005-10-11 04:54:29.000000000 +1000
    +++ linux-2.6.13.4/net/x25/x25_facilities.c 2005-10-21 09:20:16.000000000 +1000
    @@ -28,11 +28,12 @@
    #include <net/x25.h>

    /*
    - * Parse a set of facilities into the facilities structure. Unrecognised
    + * Parse a set of facilities into the facilities structures. Unrecognised
    * facilities are written to the debug log file.
    */
    int x25_parse_facilities(struct sk_buff *skb,
    struct x25_facilities *facilities,
    + struct x25_dte_facilities *dte_facs,
    unsigned long *vc_fac_mask)
    {
    unsigned char *p = skb->data;
    @@ -40,6 +41,16 @@ int x25_parse_facilities(struct sk_buff

    *vc_fac_mask = 0;

    + /* The kernel knows which facilities were set on an incoming call
    + * but currently this information is not available to userspace.
    + * Here we give userspace who read incoming call facilities
    + * 0 length to indicate it wasn't set.
    + */
    + dte_facs->calling_len = 0;
    + dte_facs->called_len = 0;
    + memset(dte_facs->called_ae, '\0', sizeof(dte_facs->called_ae));
    + memset(dte_facs->calling_ae, '\0', sizeof(dte_facs->calling_ae));
    +
    while (len > 0) {
    switch (*p & X25_FAC_CLASS_MASK) {
    case X25_FAC_CLASS_A:
    @@ -74,6 +85,8 @@ int x25_parse_facilities(struct sk_buff
    facilities->throughput = p[1];
    *vc_fac_mask |= X25_MASK_THROUGHPUT;
    break;
    + case X25_MARKER:
    + break;
    default:
    printk(KERN_DEBUG "X.25: unknown facility "
    "%02X, value %02X\n",
    @@ -112,9 +125,28 @@ int x25_parse_facilities(struct sk_buff
    len -= 4;
    break;
    case X25_FAC_CLASS_D:
    - printk(KERN_DEBUG "X.25: unknown facility %02X, "
    - "length %d, values %02X, %02X, %02X, %02X\n",
    - p[0], p[1], p[2], p[3], p[4], p[5]);
    + switch (*p) {
    + case X25_FAC_CALLING_AE:
    + if (p[1] > 33)
    + break;
    + dte_facs->calling_len = p[2];
    + memcpy(dte_facs->calling_ae, &p[3], p[1] - 1);
    + *vc_fac_mask |= X25_MASK_CALLING_AE;
    + break;
    + case X25_FAC_CALLED_AE:
    + if (p[1] > 33)
    + break;
    + dte_facs->called_len = p[2];
    + memcpy(dte_facs->called_ae, &p[3], p[1] - 1);
    + *vc_fac_mask |= X25_MASK_CALLED_AE;
    + break;
    + default:
    + printk(KERN_DEBUG "X.25: unknown facility %02X,"
    + "length %d, values %02X, %02X, %02X, %02X\n",
    + p[0], p[1], p[2], p[3], p[4], p[5]);
    + break;
    + }
    +
    len -= p[1] + 2;
    p += p[1] + 2;
    break;
    @@ -129,6 +161,7 @@ int x25_parse_facilities(struct sk_buff
    */
    int x25_create_facilities(unsigned char *buffer,
    struct x25_facilities *facilities,
    + struct x25_dte_facilities *dte_facs,
    unsigned long facil_mask)
    {
    unsigned char *p = buffer + 1;
    @@ -168,6 +201,34 @@ int x25_create_facilities(unsigned char
    *p++ = facilities->winsize_out ? : facilities->winsize_in;
    }

    + if ((facil_mask & X25_MASK_CALLING_AE) ||
    + (facil_mask & X25_MASK_CALLED_AE)) {
    + *p++ = X25_MARKER;
    + *p++ = X25_DTE_SERVICES;
    + }
    +
    + if (dte_facs->calling_len && (facil_mask & X25_MASK_CALLING_AE)) {
    + unsigned bytecount = (dte_facs->calling_len % 2) ?
    + dte_facs->calling_len / 2 + 1 :
    + dte_facs->calling_len / 2;
    + *p++ = X25_FAC_CALLING_AE;
    + *p++ = 1 + bytecount;
    + *p++ = dte_facs->calling_len;
    + memcpy(p, dte_facs->calling_ae, bytecount);
    + p+=bytecount;
    + }
    +
    + if (dte_facs->called_len && (facil_mask & X25_MASK_CALLED_AE)) {
    + unsigned bytecount = (dte_facs->called_len % 2) ?
    + dte_facs->called_len / 2 + 1 :
    + dte_facs->called_len / 2;
    + *p++ = X25_FAC_CALLED_AE;
    + *p++ = 1 + bytecount;
    + *p++ = dte_facs->called_len;
    + memcpy(p, dte_facs->called_ae, bytecount);
    + p+=bytecount;
    + }
    +
    len = p - buffer;
    buffer[0] = len - 1;

    @@ -180,7 +241,8 @@ int x25_create_facilities(unsigned char
    * The only real problem is with reverse charging.
    */
    int x25_negotiate_facilities(struct sk_buff *skb, struct sock *sk,
    - struct x25_facilities *new)
    + struct x25_facilities *new,
    + struct x25_dte_facilities *dte)
    {
    struct x25_sock *x25 = x25_sk(sk);
    struct x25_facilities *ours = &x25->facilities;
    @@ -190,7 +252,7 @@ int x25_negotiate_facilities(struct sk_b
    memset(&theirs, 0, sizeof(theirs));
    memcpy(new, ours, sizeof(*new));

    - len = x25_parse_facilities(skb, &theirs, &x25->vc_facil_mask);
    + len = x25_parse_facilities(skb, &theirs, dte, &x25->vc_facil_mask);

    /*
    * They want reverse charging, we won't accept it.
    diff -uprN -X dontdiff linux-2.6.13.4-vanilla/net/x25/x25_in.c linux-2.6.13.4/net/x25/x25_in.c
    --- linux-2.6.13.4-vanilla/net/x25/x25_in.c 2005-10-11 04:54:29.000000000 +1000
    +++ linux-2.6.13.4/net/x25/x25_in.c 2005-10-21 09:20:16.000000000 +1000
    @@ -106,6 +106,7 @@ static int x25_state1_machine(struct soc
    skb_pull(skb, x25_addr_ntoa(skb->data, &source_addr, &dest_addr));
    skb_pull(skb,
    x25_parse_facilities(skb, &x25->facilities,
    + &x25->dte_facilities,
    &x25->vc_facil_mask));
    /*
    * Copy any Call User Data.
    diff -uprN -X dontdiff linux-2.6.13.4-vanilla/net/x25/x25_subr.c linux-2.6.13.4/net/x25/x25_subr.c
    --- linux-2.6.13.4-vanilla/net/x25/x25_subr.c 2005-10-11 04:54:29.000000000 +1000
    +++ linux-2.6.13.4/net/x25/x25_subr.c 2005-10-21 09:20:16.000000000 +1000
    @@ -191,6 +191,7 @@ void x25_write_internal(struct sock *sk,
    memcpy(dptr, addresses, len);
    len = x25_create_facilities(facilities,
    &x25->facilities,
    + &x25->dte_facilities,
    x25->neighbour->global_facil_mask);
    dptr = skb_put(skb, len);
    memcpy(dptr, facilities, len);
    @@ -206,6 +207,7 @@ void x25_write_internal(struct sock *sk,
    *dptr++ = 0x00; /* Address lengths */
    len = x25_create_facilities(facilities,
    &x25->facilities,
    + &x25->dte_facilities,
    x25->vc_facil_mask);
    dptr = skb_put(skb, len);
    memcpy(dptr, facilities, len);

    -
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