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/*-
* Copyright (c) 2013-2015 Varnish Software AS
* All rights reserved.
*
* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
*
* SPDX-License-Identifier: BSD-2-Clause
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
struct req;
struct vfp_entry;
struct vfp_ctx;
struct vdp_ctx;
/* Fetch processors --------------------------------------------------*/
#define VFP_DEBUG(ctx, fmt, ...) \
do { \
if (!DO_DEBUG(DBG_PROCESSORS)) \
break; \
VSLb((ctx)->wrk->vsl, SLT_Debug, "VFP:%s:%d: " fmt, \
__func__, __LINE__, __VA_ARGS__); \
} while (0)
enum vfp_status {
VFP_ERROR = -1,
VFP_OK = 0,
VFP_END = 1,
VFP_NULL = 2, // signal bypass, never returned by VFP_Suck()
};
typedef enum vfp_status vfp_init_f(VRT_CTX, struct vfp_ctx *,
struct vfp_entry *);
typedef enum vfp_status
vfp_pull_f(struct vfp_ctx *, struct vfp_entry *, void *ptr, ssize_t *len);
typedef void vfp_fini_f(struct vfp_ctx *, struct vfp_entry *);
struct vfp {
const char *name;
vfp_init_f *init;
vfp_pull_f *pull;
vfp_fini_f *fini;
const void *priv1;
};
struct vfp_entry {
unsigned magic;
#define VFP_ENTRY_MAGIC 0xbe32a027
enum vfp_status closed;
const struct vfp *vfp;
void *priv1; // XXX ambiguous with priv1 in struct vfp
ssize_t priv2;
VTAILQ_ENTRY(vfp_entry) list;
uint64_t calls;
uint64_t bytes_out;
};
/*--------------------------------------------------------------------
* VFP filter state
*/
VTAILQ_HEAD(vfp_entry_s, vfp_entry);
struct vfp_ctx {
unsigned magic;
#define VFP_CTX_MAGIC 0x61d9d3e5
int failed;
struct http *req;
struct http *resp;
struct worker *wrk;
struct objcore *oc; // Only first filter, if at all
struct vfp_entry_s vfp;
struct vfp_entry *vfp_nxt;
unsigned obj_flags;
};
enum vfp_status VFP_Suck(struct vfp_ctx *, void *p, ssize_t *lp);
enum vfp_status VFP_Error(struct vfp_ctx *, const char *fmt, ...)
v_printflike_(2, 3);
void v_deprecated_ VRT_AddVFP(VRT_CTX, const struct vfp *);
void v_deprecated_ VRT_RemoveVFP(VRT_CTX, const struct vfp *);
/* Deliver processors ------------------------------------------------*/
enum vdp_action {
VDP_NULL, /* Input buffer valid after call */
VDP_FLUSH, /* Input buffer will be invalidated */
VDP_END, /* Last buffer or after, implies VDP_FLUSH */
};
typedef int vdp_init_f(VRT_CTX, struct vdp_ctx *, void **priv);
/*
* Return value:
* negative: Error - abandon delivery
* zero: OK
* positive: Don't push this VDP anyway
*/
typedef int vdp_fini_f(struct vdp_ctx *, void **priv);
typedef int vdp_bytes_f(struct vdp_ctx *, enum vdp_action, void **priv,
const void *ptr, ssize_t len);
struct vdp {
const char *name;
vdp_init_f *init;
vdp_bytes_f *bytes;
vdp_fini_f *fini;
const void *priv1;
};
struct vdp_entry {
unsigned magic;
#define VDP_ENTRY_MAGIC 0x353eb781
enum vdp_action end; // VDP_NULL or VDP_END
const struct vdp *vdp;
void *priv;
VTAILQ_ENTRY(vdp_entry) list;
uint64_t calls;
uint64_t bytes_in;
};
VTAILQ_HEAD(vdp_entry_s, vdp_entry);
struct vdp_ctx {
unsigned magic;
#define VDP_CTX_MAGIC 0xee501df7
int retval;
uint64_t bytes_done;
struct vdp_entry_s vdp;
struct vdp_entry *nxt;
struct worker *wrk;
struct vsl_log *vsl;
// NULL'ed after the first filter has been pushed
struct objcore *oc;
// NULL'ed for delivery
struct http *hp;
intmax_t *clen;
};
int VDP_bytes(struct vdp_ctx *, enum vdp_action act, const void *, ssize_t);
void v_deprecated_ VRT_AddVDP(VRT_CTX, const struct vdp *);
void v_deprecated_ VRT_RemoveVDP(VRT_CTX, const struct vdp *);
/* Registry functions -------------------------------------------------*/
const char *VRT_AddFilter(VRT_CTX, const struct vfp *, const struct vdp *);
void VRT_RemoveFilter(VRT_CTX, const struct vfp *, const struct vdp *);
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