static void
vpx_enc_port(struct vsb *vsb, const struct suckaddr *s)
{
uint8_t b[2];
vbe16enc(b, (uint16_t)VSA_Port(s));
VSB_bcat(vsb, b, sizeof(b));
}
static void
vep_emit_len(const struct vep_state *vep, ssize_t l, int m8, int m16, int m64)
{
uint8_t buf[9];
assert(l > 0);
if (l < 256) {
buf[0] = (uint8_t)m8;
buf[1] = (uint8_t)l;
assert((ssize_t)buf[1] == l);
VSB_bcat(vep->vsb, buf, 2);
} else if (l < 65536) {
buf[0] = (uint8_t)m16;
vbe16enc(buf + 1, (uint16_t)l);
assert((ssize_t)vbe16dec(buf + 1) == l);
VSB_bcat(vep->vsb, buf, 3);
} else {
buf[0] = (uint8_t)m64;
vbe64enc(buf + 1, l);
assert((ssize_t)vbe64dec(buf + 1) == l);
VSB_bcat(vep->vsb, buf, 9);
}
}
int
VRY_Match(struct req *req, const uint8_t *vary)
{
uint8_t *vsp = req->vary_b;
char *h, *e;
unsigned lh, ln;
int i, oflo = 0;
AN(vsp);
while (vary[2]) {
if (vsp + 2 >= req->vary_e) {
/*
* Too little workspace to find out
*/
oflo = 1;
break;
}
i = vry_cmp(vary, vsp);
if (i == 1) {
/*
* Different header, build a new entry,
* then compare again with that new entry.
*/
ln = 2 + vary[2] + 2;
i = http_GetHdr(req->http, (const char*)(vary+2), &h);
if (i) {
/* Trim trailing space */
e = strchr(h, '\0');
while (e > h && vct_issp(e[-1]))
e--;
lh = e - h;
assert(lh < 0xffff);
ln += lh;
} else {
e = h = NULL;
lh = 0xffff;
}
if (vsp + ln + 2 >= req->vary_e) {
/*
* Not enough space to build new entry
* and put terminator behind it.
*/
oflo = 1;
break;
}
vbe16enc(vsp, (uint16_t)lh);
memcpy(vsp + 2, vary + 2, vary[2] + 2);
if (h != NULL)
memcpy(vsp + 2 + vsp[2] + 2, h, lh);
vsp[ln + 0] = 0xff;
vsp[ln + 1] = 0xff;
vsp[ln + 2] = 0;
(void)VRY_Validate(vsp);
req->vary_l = vsp + ln + 3;
i = vry_cmp(vary, vsp);
assert(i == 0 || i == 2);
}
if (i == 0) {
/* Same header, same contents */
vsp += VRY_Len(vsp);
vary += VRY_Len(vary);
} else if (i == 2) {
/* Same header, different contents, cannot match */
return (0);
}
}
if (oflo) {
vsp = req->vary_b;
req->vary_l = NULL;
if (vsp + 2 < req->vary_e) {
vsp[0] = 0xff;
vsp[1] = 0xff;
vsp[2] = 0;
}
return (0);
} else {
return (1);
}
}
int
VRY_Match(struct sess *sp, const uint8_t *vary)
{
uint8_t *vsp = sp->vary_b;
char *h, *e;
unsigned lh, ln;
int i, retval = 1, oflo = 0;
AN(vsp);
while (vary[2]) {
i = vry_cmp(&vary, &vsp);
if (i == 1) {
/* Build a new entry */
i = http_GetHdr(sp->http, (const char*)(vary+2), &h);
if (i) {
/* Trim trailing space */
e = strchr(h, '\0');
while (e > h && vct_issp(e[-1]))
e--;
lh = e - h;
assert(lh < 0xffff);
} else {
e = h = NULL;
lh = 0xffff;
}
/* Length of the entire new vary entry */
ln = 2 + vary[2] + 2 + (lh == 0xffff ? 0 : lh);
if (vsp + ln >= sp->vary_e) {
vsp = sp->vary_b;
oflo = 1;
}
/*
* We MUST have space for one entry and the end marker
* after it, which prevents old junk from confusing us
*/
assert(vsp + ln + 2 < sp->vary_e);
vbe16enc(vsp, (uint16_t)lh);
memcpy(vsp + 2, vary + 2, vary[2] + 2);
if (h != NULL && e != NULL) {
memcpy(vsp + 2 + vsp[2] + 2, h, e - h);
vsp[2 + vary[2] + 2 + (e - h) + 2] = '\0';
} else
vsp[2 + vary[2] + 2 + 2] = '\0';
i = vry_cmp(&vary, &vsp);
assert(i != 1); /* hdr must be the same now */
}
if (i != 0)
retval = 0;
vsp += vry_len(vsp);
vary += vry_len(vary);
}
if (vsp + 3 > sp->vary_e)
oflo = 1;
if (oflo) {
/* XXX: Should log this */
vsp = sp->vary_b;
}
vsp[0] = 0xff;
vsp[1] = 0xff;
vsp[2] = 0;
if (oflo)
sp->vary_l = NULL;
else
sp->vary_l = vsp + 3;
return (retval);
}
