| | varnish-cache/lib/libvcc/vcc_backend.c |
|---|
| 0 |
|
/*- |
| 1 |
|
* Copyright (c) 2006 Verdens Gang AS |
| 2 |
|
* Copyright (c) 2006-2015 Varnish Software AS |
| 3 |
|
* All rights reserved. |
| 4 |
|
* |
| 5 |
|
* Author: Poul-Henning Kamp <phk@phk.freebsd.dk> |
| 6 |
|
* |
| 7 |
|
* SPDX-License-Identifier: BSD-2-Clause |
| 8 |
|
* |
| 9 |
|
* Redistribution and use in source and binary forms, with or without |
| 10 |
|
* modification, are permitted provided that the following conditions |
| 11 |
|
* are met: |
| 12 |
|
* 1. Redistributions of source code must retain the above copyright |
| 13 |
|
* notice, this list of conditions and the following disclaimer. |
| 14 |
|
* 2. Redistributions in binary form must reproduce the above copyright |
| 15 |
|
* notice, this list of conditions and the following disclaimer in the |
| 16 |
|
* documentation and/or other materials provided with the distribution. |
| 17 |
|
* |
| 18 |
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 19 |
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 |
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 |
|
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE |
| 22 |
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 |
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 |
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 |
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 |
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 |
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 |
|
* SUCH DAMAGE. |
| 29 |
|
* |
| 30 |
|
*/ |
| 31 |
|
|
| 32 |
|
#include "config.h" |
| 33 |
|
|
| 34 |
|
#include <math.h> |
| 35 |
|
#include <stdlib.h> |
| 36 |
|
#include <string.h> |
| 37 |
|
#include <sys/stat.h> |
| 38 |
|
#include <sys/types.h> |
| 39 |
|
#include <sys/socket.h> |
| 40 |
|
#include <netdb.h> |
| 41 |
|
|
| 42 |
|
|
| 43 |
|
#include "vcc_compile.h" |
| 44 |
|
#include "vsa.h" |
| 45 |
|
#include "vss.h" |
| 46 |
|
#include "vus.h" |
| 47 |
|
|
| 48 |
|
/*-------------------------------------------------------------------- |
| 49 |
|
* Struct sockaddr is not really designed to be a compile time |
| 50 |
|
* initialized data structure, so we encode it as a byte-string |
| 51 |
|
* and put it in an official sockaddr when we load the VCL. |
| 52 |
|
*/ |
| 53 |
|
|
| 54 |
|
static void |
| 55 |
1348 |
Emit_Sockaddr(struct vcc *tl, struct vsb *vsb1, const struct token *t_host, |
| 56 |
|
const struct token *t_port) |
| 57 |
|
{ |
| 58 |
|
const char *ipv4, *ipv4a, *ipv6, *ipv6a, *pa; |
| 59 |
|
char buf[BUFSIZ]; |
| 60 |
|
|
| 61 |
1348 |
AN(t_host->dec); |
| 62 |
|
|
| 63 |
1348 |
if (t_port != NULL) |
| 64 |
1026 |
bprintf(buf, "%s %s", t_host->dec, t_port->dec); |
| 65 |
|
else |
| 66 |
322 |
bprintf(buf, "%s", t_host->dec); |
| 67 |
2696 |
Resolve_Sockaddr(tl, buf, "80", |
| 68 |
1348 |
&ipv4, &ipv4a, &ipv6, &ipv6a, &pa, 2, t_host, "Backend host"); |
| 69 |
1348 |
ERRCHK(tl); |
| 70 |
1346 |
if (ipv4 != NULL) { |
| 71 |
2680 |
VSB_printf(vsb1, |
| 72 |
|
"\t.ipv4 = (const struct suckaddr *)%s,\n", |
| 73 |
1340 |
ipv4); |
| 74 |
1340 |
} |
| 75 |
1346 |
if (ipv6 != NULL) { |
| 76 |
14 |
VSB_printf(vsb1, |
| 77 |
|
"\t.ipv6 = (const struct suckaddr *)%s,\n", |
| 78 |
7 |
ipv6); |
| 79 |
7 |
} |
| 80 |
1346 |
VSB_cat(vsb1, "\t.uds_path = (void *) 0,\n"); |
| 81 |
1348 |
} |
| 82 |
|
|
| 83 |
|
/* |
| 84 |
|
* a string represents an IP address if getaddrinfo(AI_NUMERICHOST) succeeds |
| 85 |
|
*/ |
| 86 |
|
static int |
| 87 |
10 |
isip(const char *addr) |
| 88 |
|
{ |
| 89 |
10 |
char buf[vsa_suckaddr_len]; |
| 90 |
|
|
| 91 |
10 |
return (VSS_ResolveOne(buf, addr, "80", AF_UNSPEC, SOCK_STREAM, |
| 92 |
10 |
AI_NUMERICHOST | AI_NUMERICSERV) != NULL); |
| 93 |
10 |
} |
| 94 |
|
|
| 95 |
|
/* |
| 96 |
|
* For UDS, we do not create a VSA. We run the VUS_resolver() checks and, if |
| 97 |
|
* it's a path, can be accessed, and is a socket. If so, just emit the path |
| 98 |
|
* field and set the IP suckaddrs to NULL. |
| 99 |
|
*/ |
| 100 |
|
|
| 101 |
|
static int |
| 102 |
32 |
uds_resolved(void *priv, const struct sockaddr_un *uds) |
| 103 |
|
{ |
| 104 |
32 |
(void) priv; |
| 105 |
32 |
(void) uds; |
| 106 |
32 |
return (42); |
| 107 |
|
} |
| 108 |
|
|
| 109 |
|
static void |
| 110 |
31 |
emit_path(struct vsb *vsb1, char *path) |
| 111 |
|
{ |
| 112 |
31 |
VSB_printf(vsb1, "\t.uds_path = \"%s\",\n", path); |
| 113 |
31 |
VSB_cat(vsb1, "\t.ipv4 = (void *) 0,\n"); |
| 114 |
31 |
VSB_cat(vsb1, "\t.ipv6 = (void *) 0,\n"); |
| 115 |
31 |
} |
| 116 |
|
|
| 117 |
|
static void |
| 118 |
34 |
Emit_UDS_Path(struct vcc *tl, struct vsb *vsb1, |
| 119 |
|
const struct token *t_path, const char *errid) |
| 120 |
|
{ |
| 121 |
|
struct stat st; |
| 122 |
|
const char *vus_err; |
| 123 |
|
|
| 124 |
34 |
AN(t_path); |
| 125 |
34 |
AN(t_path->dec); |
| 126 |
|
|
| 127 |
34 |
if (! VUS_is(t_path->dec)) { |
| 128 |
2 |
VSB_printf(tl->sb, |
| 129 |
|
"%s: Must be a valid path or abstract socket:\n", |
| 130 |
1 |
errid); |
| 131 |
1 |
vcc_ErrWhere(tl, t_path); |
| 132 |
1 |
return; |
| 133 |
|
} |
| 134 |
33 |
if (VUS_resolver(t_path->dec, uds_resolved, NULL, &vus_err) != 42) { |
| 135 |
1 |
VSB_printf(tl->sb, "%s: %s\n", errid, vus_err); |
| 136 |
1 |
vcc_ErrWhere(tl, t_path); |
| 137 |
1 |
return; |
| 138 |
|
} |
| 139 |
32 |
if (*t_path->dec == '@') { |
| 140 |
0 |
emit_path(vsb1, t_path->dec); |
| 141 |
0 |
return; |
| 142 |
|
} |
| 143 |
32 |
assert(*t_path->dec == '/'); |
| 144 |
32 |
errno = 0; |
| 145 |
32 |
if (stat(t_path->dec, &st) != 0) { |
| 146 |
1 |
int err = errno; |
| 147 |
2 |
VSB_printf(tl->sb, "%s: Cannot stat: %s\n", errid, |
| 148 |
1 |
strerror(errno)); |
| 149 |
1 |
vcc_ErrWhere(tl, t_path); |
| 150 |
1 |
if (err == ENOENT || err == EACCES) |
| 151 |
1 |
vcc_Warn(tl); |
| 152 |
|
else |
| 153 |
0 |
return; |
| 154 |
32 |
} else if (!S_ISSOCK(st.st_mode)) { |
| 155 |
1 |
VSB_printf(tl->sb, "%s: Not a socket:\n", errid); |
| 156 |
1 |
vcc_ErrWhere(tl, t_path); |
| 157 |
1 |
return; |
| 158 |
|
} |
| 159 |
31 |
emit_path(vsb1, t_path->dec); |
| 160 |
34 |
} |
| 161 |
|
|
| 162 |
|
/*-------------------------------------------------------------------- |
| 163 |
|
* Disallow mutually exclusive field definitions |
| 164 |
|
*/ |
| 165 |
|
|
| 166 |
|
static void |
| 167 |
1417 |
vcc_Redef(struct vcc *tl, const char *redef, const struct token **t_did, |
| 168 |
|
const struct token *t_field) |
| 169 |
|
{ |
| 170 |
1417 |
if (*t_did != NULL) { |
| 171 |
3 |
VSB_printf(tl->sb, "%s redefinition at:\n", redef); |
| 172 |
3 |
vcc_ErrWhere(tl, t_field); |
| 173 |
3 |
VSB_cat(tl->sb, "Previous definition:\n"); |
| 174 |
3 |
vcc_ErrWhere(tl, *t_did); |
| 175 |
3 |
return; |
| 176 |
|
} |
| 177 |
1414 |
*t_did = t_field; |
| 178 |
1417 |
} |
| 179 |
|
|
| 180 |
|
/*-------------------------------------------------------------------- |
| 181 |
|
* Parse a backend probe specification |
| 182 |
|
*/ |
| 183 |
|
|
| 184 |
|
static void |
| 185 |
47 |
vcc_ParseProbeSpec(struct vcc *tl, const struct symbol *sym, char **namep) |
| 186 |
|
{ |
| 187 |
|
struct fld_spec *fs; |
| 188 |
|
const struct token *t_field; |
| 189 |
47 |
const struct token *t_did = NULL, *t_window = NULL, *t_threshold = NULL; |
| 190 |
47 |
struct token *t_initial = NULL; |
| 191 |
|
unsigned window, threshold, initial, status, exp_close; |
| 192 |
|
char buf[32]; |
| 193 |
|
const char *name; |
| 194 |
|
double t; |
| 195 |
|
|
| 196 |
47 |
fs = vcc_FldSpec(tl, |
| 197 |
|
"?url", |
| 198 |
|
"?request", |
| 199 |
|
"?expected_response", |
| 200 |
|
"?timeout", |
| 201 |
|
"?interval", |
| 202 |
|
"?window", |
| 203 |
|
"?threshold", |
| 204 |
|
"?initial", |
| 205 |
|
"?expect_close", |
| 206 |
|
NULL); |
| 207 |
|
|
| 208 |
47 |
SkipToken(tl, '{'); |
| 209 |
|
|
| 210 |
47 |
if (sym != NULL) { |
| 211 |
21 |
name = sym->rname; |
| 212 |
21 |
} else { |
| 213 |
26 |
bprintf(buf, "vgc_probe__%d", tl->nprobe++); |
| 214 |
26 |
name = buf; |
| 215 |
|
} |
| 216 |
47 |
Fh(tl, 0, "static const struct vrt_backend_probe %s[] = {{\n", name); |
| 217 |
47 |
Fh(tl, 0, "\t.magic = VRT_BACKEND_PROBE_MAGIC,\n"); |
| 218 |
47 |
if (namep != NULL) |
| 219 |
47 |
*namep = TlDup(tl, name); |
| 220 |
|
|
| 221 |
47 |
window = 0; |
| 222 |
47 |
threshold = 0; |
| 223 |
47 |
initial = 0; |
| 224 |
47 |
status = 0; |
| 225 |
47 |
exp_close = 1; |
| 226 |
157 |
while (tl->t->tok != '}') { |
| 227 |
|
|
| 228 |
116 |
vcc_IsField(tl, &t_field, fs); |
| 229 |
116 |
ERRCHK(tl); |
| 230 |
116 |
if (vcc_IdIs(t_field, "url")) { |
| 231 |
13 |
vcc_Redef(tl, "Probe request", &t_did, t_field); |
| 232 |
13 |
ERRCHK(tl); |
| 233 |
12 |
ExpectErr(tl, CSTR); |
| 234 |
12 |
Fh(tl, 0, "\t.url = "); |
| 235 |
12 |
EncToken(tl->fh, tl->t); |
| 236 |
12 |
Fh(tl, 0, ",\n"); |
| 237 |
12 |
vcc_NextToken(tl); |
| 238 |
115 |
} else if (vcc_IdIs(t_field, "request")) { |
| 239 |
5 |
vcc_Redef(tl, "Probe request", &t_did, t_field); |
| 240 |
5 |
ERRCHK(tl); |
| 241 |
4 |
ExpectErr(tl, CSTR); |
| 242 |
4 |
Fh(tl, 0, "\t.request =\n"); |
| 243 |
16 |
while (tl->t->tok == CSTR) { |
| 244 |
12 |
Fh(tl, 0, "\t\t"); |
| 245 |
12 |
EncToken(tl->fh, tl->t); |
| 246 |
12 |
Fh(tl, 0, " \"\\r\\n\"\n"); |
| 247 |
12 |
vcc_NextToken(tl); |
| 248 |
|
} |
| 249 |
4 |
Fh(tl, 0, "\t\t\"\\r\\n\",\n"); |
| 250 |
102 |
} else if (vcc_IdIs(t_field, "timeout")) { |
| 251 |
10 |
Fh(tl, 0, "\t.timeout = "); |
| 252 |
10 |
vcc_Duration(tl, &t); |
| 253 |
10 |
ERRCHK(tl); |
| 254 |
9 |
Fh(tl, 0, "%g,\n", t); |
| 255 |
97 |
} else if (vcc_IdIs(t_field, "interval")) { |
| 256 |
26 |
Fh(tl, 0, "\t.interval = "); |
| 257 |
26 |
vcc_Duration(tl, &t); |
| 258 |
26 |
ERRCHK(tl); |
| 259 |
26 |
Fh(tl, 0, "%g,\n", t); |
| 260 |
88 |
} else if (vcc_IdIs(t_field, "window")) { |
| 261 |
20 |
t_window = tl->t; |
| 262 |
20 |
window = vcc_UintVal(tl); |
| 263 |
20 |
ERRCHK(tl); |
| 264 |
62 |
} else if (vcc_IdIs(t_field, "initial")) { |
| 265 |
14 |
t_initial = tl->t; |
| 266 |
14 |
initial = vcc_UintVal(tl); |
| 267 |
14 |
ERRCHK(tl); |
| 268 |
42 |
} else if (vcc_IdIs(t_field, "expected_response")) { |
| 269 |
2 |
status = vcc_UintVal(tl); |
| 270 |
2 |
if (status < 100 || status > 999) { |
| 271 |
1 |
VSB_cat(tl->sb, |
| 272 |
|
"Must specify .expected_response with " |
| 273 |
|
"exactly three digits " |
| 274 |
|
"(100 <= x <= 999)\n"); |
| 275 |
1 |
vcc_ErrWhere(tl, tl->t); |
| 276 |
1 |
return; |
| 277 |
|
} |
| 278 |
1 |
ERRCHK(tl); |
| 279 |
27 |
} else if (vcc_IdIs(t_field, "threshold")) { |
| 280 |
22 |
t_threshold = tl->t; |
| 281 |
22 |
threshold = vcc_UintVal(tl); |
| 282 |
22 |
ERRCHK(tl); |
| 283 |
26 |
} else if (vcc_IdIs(t_field, "expect_close")) { |
| 284 |
4 |
exp_close = vcc_BoolVal(tl); |
| 285 |
4 |
ERRCHK(tl); |
| 286 |
2 |
} else { |
| 287 |
0 |
vcc_ErrToken(tl, t_field); |
| 288 |
0 |
vcc_ErrWhere(tl, t_field); |
| 289 |
0 |
ErrInternal(tl); |
| 290 |
0 |
return; |
| 291 |
|
} |
| 292 |
|
|
| 293 |
110 |
SkipToken(tl, ';'); |
| 294 |
|
} |
| 295 |
41 |
free(fs); |
| 296 |
|
|
| 297 |
41 |
if (t_threshold != NULL || t_window != NULL) { |
| 298 |
23 |
if (t_threshold == NULL && t_window != NULL) { |
| 299 |
1 |
VSB_cat(tl->sb, |
| 300 |
|
"Must specify .threshold with .window\n"); |
| 301 |
1 |
vcc_ErrWhere(tl, t_window); |
| 302 |
1 |
return; |
| 303 |
22 |
} else if (t_threshold != NULL && t_window == NULL) { |
| 304 |
3 |
if (threshold > 64) { |
| 305 |
1 |
VSB_cat(tl->sb, |
| 306 |
|
"Threshold must be 64 or less.\n"); |
| 307 |
1 |
vcc_ErrWhere(tl, t_threshold); |
| 308 |
1 |
return; |
| 309 |
|
} |
| 310 |
2 |
window = threshold + 1; |
| 311 |
21 |
} else if (window > 64) { |
| 312 |
1 |
AN(t_window); |
| 313 |
1 |
VSB_cat(tl->sb, "Window must be 64 or less.\n"); |
| 314 |
1 |
vcc_ErrWhere(tl, t_window); |
| 315 |
1 |
return; |
| 316 |
|
} |
| 317 |
20 |
if (threshold > window ) { |
| 318 |
1 |
VSB_cat(tl->sb, |
| 319 |
|
"Threshold cannot be greater than window.\n"); |
| 320 |
1 |
AN(t_threshold); |
| 321 |
1 |
vcc_ErrWhere(tl, t_threshold); |
| 322 |
1 |
AN(t_window); |
| 323 |
1 |
vcc_ErrWhere(tl, t_window); |
| 324 |
1 |
} |
| 325 |
20 |
Fh(tl, 0, "\t.window = %u,\n", window); |
| 326 |
20 |
Fh(tl, 0, "\t.threshold = %u,\n", threshold); |
| 327 |
20 |
} |
| 328 |
38 |
if (t_initial != NULL) |
| 329 |
14 |
Fh(tl, 0, "\t.initial = %u,\n", initial); |
| 330 |
|
else |
| 331 |
24 |
Fh(tl, 0, "\t.initial = ~0U,\n"); |
| 332 |
38 |
if (status > 0) |
| 333 |
1 |
Fh(tl, 0, "\t.exp_status = %u,\n", status); |
| 334 |
38 |
Fh(tl, 0, "\t.exp_close = %u,\n", exp_close); |
| 335 |
38 |
Fh(tl, 0, "}};\n"); |
| 336 |
38 |
SkipToken(tl, '}'); |
| 337 |
47 |
} |
| 338 |
|
|
| 339 |
|
/*-------------------------------------------------------------------- |
| 340 |
|
* Parse and emit a probe definition |
| 341 |
|
*/ |
| 342 |
|
|
| 343 |
|
void |
| 344 |
22 |
vcc_ParseProbe(struct vcc *tl) |
| 345 |
|
{ |
| 346 |
|
struct symbol *sym; |
| 347 |
|
char *p; |
| 348 |
|
|
| 349 |
22 |
vcc_NextToken(tl); /* ID: probe */ |
| 350 |
|
|
| 351 |
22 |
vcc_ExpectVid(tl, "backend probe"); /* ID: name */ |
| 352 |
22 |
ERRCHK(tl); |
| 353 |
|
|
| 354 |
22 |
sym = VCC_HandleSymbol(tl, PROBE); |
| 355 |
22 |
ERRCHK(tl); |
| 356 |
21 |
AN(sym); |
| 357 |
21 |
vcc_ParseProbeSpec(tl, sym, &p); |
| 358 |
|
|
| 359 |
21 |
if (sym->type == DEFAULT) |
| 360 |
10 |
tl->default_probe = p; |
| 361 |
|
else |
| 362 |
11 |
free(p); |
| 363 |
22 |
} |
| 364 |
|
|
| 365 |
|
/*-------------------------------------------------------------------- |
| 366 |
|
* Parse and emit a backend host definition |
| 367 |
|
* |
| 368 |
|
* The struct vrt_backend is emitted to Fh(). |
| 369 |
|
*/ |
| 370 |
|
|
| 371 |
|
static void |
| 372 |
1642 |
vcc_ParseHostDef(struct vcc *tl, struct symbol *sym, |
| 373 |
|
const struct token *t_be, const char *vgcname) |
| 374 |
|
{ |
| 375 |
|
const struct token *t_field; |
| 376 |
|
const struct token *t_val; |
| 377 |
|
const struct token *t_probe; |
| 378 |
1642 |
const struct token *t_host = NULL; |
| 379 |
1642 |
const struct token *t_port = NULL; |
| 380 |
1642 |
const struct token *t_path = NULL; |
| 381 |
1642 |
const struct token *t_hosthdr = NULL; |
| 382 |
1642 |
const struct token *t_authority = NULL; |
| 383 |
1642 |
const struct token *t_did = NULL; |
| 384 |
1642 |
const struct token *t_preamble = NULL; |
| 385 |
|
struct symbol *pb; |
| 386 |
|
struct fld_spec *fs; |
| 387 |
|
struct inifin *ifp; |
| 388 |
|
struct vsb *vsb1; |
| 389 |
1642 |
struct symbol *via = NULL; |
| 390 |
1642 |
vtim_dur connect_timeout = NAN; |
| 391 |
1642 |
vtim_dur first_byte_timeout = NAN; |
| 392 |
1642 |
vtim_dur between_bytes_timeout = NAN; |
| 393 |
1642 |
vtim_dur backend_wait_timeout = NAN; |
| 394 |
|
char *p, *pp; |
| 395 |
|
unsigned u; |
| 396 |
|
int l; |
| 397 |
|
|
| 398 |
1746 |
if (tl->t->tok == ID && |
| 399 |
239 |
(vcc_IdIs(tl->t, "none") || vcc_IdIs(tl->t, "None"))) { |
| 400 |
239 |
vcc_NextToken(tl); |
| 401 |
239 |
SkipToken(tl, ';'); |
| 402 |
239 |
ifp = New_IniFin(tl); |
| 403 |
239 |
VSB_printf(ifp->ini, "\t(void)%s;", vgcname); |
| 404 |
239 |
VSB_printf(ifp->fin, "\t\t(void)%s;", vgcname); |
| 405 |
239 |
return; |
| 406 |
|
} |
| 407 |
|
|
| 408 |
1403 |
SkipToken(tl, '{'); |
| 409 |
|
|
| 410 |
|
/* Check for old syntax */ |
| 411 |
1403 |
if (tl->t->tok == ID && vcc_IdIs(tl->t, "set")) { |
| 412 |
1 |
VSB_cat(tl->sb, |
| 413 |
|
"NB: Backend Syntax has changed:\n" |
| 414 |
|
"Remove \"set\" and \"backend\" in front" |
| 415 |
|
" of backend fields.\n" ); |
| 416 |
1 |
vcc_ErrToken(tl, tl->t); |
| 417 |
1 |
VSB_cat(tl->sb, " at "); |
| 418 |
1 |
vcc_ErrWhere(tl, tl->t); |
| 419 |
1 |
return; |
| 420 |
|
} |
| 421 |
|
|
| 422 |
1402 |
fs = vcc_FldSpec(tl, |
| 423 |
|
"?host", |
| 424 |
|
"?port", |
| 425 |
|
"?path", |
| 426 |
|
"?host_header", |
| 427 |
|
"?connect_timeout", |
| 428 |
|
"?first_byte_timeout", |
| 429 |
|
"?between_bytes_timeout", |
| 430 |
|
"?probe", |
| 431 |
|
"?max_connections", |
| 432 |
|
"?proxy_header", |
| 433 |
|
"?preamble", |
| 434 |
|
"?via", |
| 435 |
|
"?authority", |
| 436 |
|
"?wait_timeout", |
| 437 |
|
"?wait_limit", |
| 438 |
|
NULL); |
| 439 |
|
|
| 440 |
1402 |
tl->fb = VSB_new_auto(); |
| 441 |
1402 |
AN(tl->fb); |
| 442 |
|
|
| 443 |
2804 |
Fb(tl, 0, "\nstatic const struct vrt_backend vgc_dir_priv_%s = {\n", |
| 444 |
1402 |
vgcname); |
| 445 |
|
|
| 446 |
1402 |
Fb(tl, 0, "\t.magic = VRT_BACKEND_MAGIC,\n"); |
| 447 |
1402 |
Fb(tl, 0, "\t.endpoint = &vgc_dir_ep_%s,\n", vgcname); |
| 448 |
1402 |
Fb(tl, 0, "\t.vcl_name = \"%.*s", PF(t_be)); |
| 449 |
1402 |
Fb(tl, 0, "\",\n"); |
| 450 |
|
|
| 451 |
3911 |
while (tl->t->tok != '}') { |
| 452 |
|
|
| 453 |
2527 |
vcc_IsField(tl, &t_field, fs); |
| 454 |
2527 |
ERRCHK(tl); |
| 455 |
2525 |
if (vcc_IdIs(t_field, "host")) { |
| 456 |
1363 |
vcc_Redef(tl, "Address", &t_did, t_field); |
| 457 |
1363 |
ERRCHK(tl); |
| 458 |
1363 |
ExpectErr(tl, CSTR); |
| 459 |
1363 |
assert(tl->t->dec != NULL); |
| 460 |
1363 |
t_host = tl->t; |
| 461 |
1363 |
vcc_NextToken(tl); |
| 462 |
1363 |
SkipToken(tl, ';'); |
| 463 |
2525 |
} else if (vcc_IdIs(t_field, "port")) { |
| 464 |
1028 |
ExpectErr(tl, CSTR); |
| 465 |
1028 |
assert(tl->t->dec != NULL); |
| 466 |
1028 |
t_port = tl->t; |
| 467 |
1028 |
vcc_NextToken(tl); |
| 468 |
1028 |
SkipToken(tl, ';'); |
| 469 |
1162 |
} else if (vcc_IdIs(t_field, "path")) { |
| 470 |
37 |
if (tl->syntax < VCL_41) { |
| 471 |
1 |
VSB_cat(tl->sb, |
| 472 |
|
"Unix socket backends only supported" |
| 473 |
|
" in VCL4.1 and higher.\n"); |
| 474 |
1 |
vcc_ErrToken(tl, tl->t); |
| 475 |
1 |
VSB_cat(tl->sb, " at "); |
| 476 |
1 |
vcc_ErrWhere(tl, tl->t); |
| 477 |
1 |
VSB_destroy(&tl->fb); |
| 478 |
1 |
return; |
| 479 |
|
} |
| 480 |
36 |
vcc_Redef(tl, "Address", &t_did, t_field); |
| 481 |
36 |
ERRCHK(tl); |
| 482 |
35 |
ExpectErr(tl, CSTR); |
| 483 |
35 |
assert(tl->t->dec != NULL); |
| 484 |
35 |
t_path = tl->t; |
| 485 |
35 |
vcc_NextToken(tl); |
| 486 |
35 |
SkipToken(tl, ';'); |
| 487 |
132 |
} else if (vcc_IdIs(t_field, "host_header")) { |
| 488 |
6 |
ExpectErr(tl, CSTR); |
| 489 |
6 |
assert(tl->t->dec != NULL); |
| 490 |
6 |
t_hosthdr = tl->t; |
| 491 |
6 |
vcc_NextToken(tl); |
| 492 |
6 |
SkipToken(tl, ';'); |
| 493 |
97 |
} else if (vcc_IdIs(t_field, "connect_timeout")) { |
| 494 |
3 |
Fb(tl, 0, "\t.connect_timeout = "); |
| 495 |
3 |
vcc_Duration(tl, &connect_timeout); |
| 496 |
3 |
ERRCHK(tl); |
| 497 |
3 |
Fb(tl, 0, "%g,\n", connect_timeout); |
| 498 |
3 |
SkipToken(tl, ';'); |
| 499 |
91 |
} else if (vcc_IdIs(t_field, "first_byte_timeout")) { |
| 500 |
3 |
Fb(tl, 0, "\t.first_byte_timeout = "); |
| 501 |
3 |
vcc_Duration(tl, &first_byte_timeout); |
| 502 |
3 |
ERRCHK(tl); |
| 503 |
3 |
Fb(tl, 0, "%g,\n", first_byte_timeout); |
| 504 |
3 |
SkipToken(tl, ';'); |
| 505 |
88 |
} else if (vcc_IdIs(t_field, "between_bytes_timeout")) { |
| 506 |
1 |
Fb(tl, 0, "\t.between_bytes_timeout = "); |
| 507 |
1 |
vcc_Duration(tl, &between_bytes_timeout); |
| 508 |
1 |
ERRCHK(tl); |
| 509 |
1 |
Fb(tl, 0, "%g,\n", between_bytes_timeout); |
| 510 |
1 |
SkipToken(tl, ';'); |
| 511 |
85 |
} else if (vcc_IdIs(t_field, "max_connections")) { |
| 512 |
11 |
u = vcc_UintVal(tl); |
| 513 |
11 |
ERRCHK(tl); |
| 514 |
11 |
SkipToken(tl, ';'); |
| 515 |
11 |
Fb(tl, 0, "\t.max_connections = %u,\n", u); |
| 516 |
84 |
} else if (vcc_IdIs(t_field, "proxy_header")) { |
| 517 |
6 |
t_val = tl->t; |
| 518 |
6 |
u = vcc_UintVal(tl); |
| 519 |
6 |
ERRCHK(tl); |
| 520 |
6 |
if (u != 1 && u != 2) { |
| 521 |
0 |
VSB_cat(tl->sb, |
| 522 |
|
".proxy_header must be 1 or 2\n"); |
| 523 |
0 |
vcc_ErrWhere(tl, t_val); |
| 524 |
0 |
VSB_destroy(&tl->fb); |
| 525 |
0 |
return; |
| 526 |
|
} |
| 527 |
6 |
SkipToken(tl, ';'); |
| 528 |
6 |
Fb(tl, 0, "\t.proxy_header = %u,\n", u); |
| 529 |
73 |
} else if (vcc_IdIs(t_field, "probe") && tl->t->tok == '{') { |
| 530 |
26 |
vcc_ParseProbeSpec(tl, NULL, &p); |
| 531 |
26 |
Fb(tl, 0, "\t.probe = %s,\n", p); |
| 532 |
26 |
free(p); |
| 533 |
26 |
ERRCHK(tl); |
| 534 |
57 |
} else if (vcc_IdIs(t_field, "probe") && tl->t->tok == ID) { |
| 535 |
11 |
t_probe = tl->t; |
| 536 |
11 |
pb = VCC_SymbolGet(tl, SYM_MAIN, SYM_PROBE, |
| 537 |
|
SYMTAB_EXISTING, XREF_REF); |
| 538 |
11 |
ERRCHK(tl); |
| 539 |
10 |
AN(pb); |
| 540 |
10 |
if (pb->type == DEFAULT) { |
| 541 |
1 |
if (tl->default_probe == NULL) { |
| 542 |
1 |
VSB_cat(tl->sb, |
| 543 |
|
"No default probe defined\n"); |
| 544 |
1 |
vcc_ErrToken(tl, t_probe); |
| 545 |
1 |
VSB_cat(tl->sb, " at\n"); |
| 546 |
1 |
vcc_ErrWhere(tl, t_probe); |
| 547 |
1 |
} |
| 548 |
1 |
pb = PROBE->default_sym; |
| 549 |
1 |
} |
| 550 |
10 |
ERRCHK(tl); |
| 551 |
9 |
Fb(tl, 0, "\t.probe = %s,\n", pb->rname); |
| 552 |
9 |
SkipToken(tl, ';'); |
| 553 |
39 |
} else if (vcc_IdIs(t_field, "probe")) { |
| 554 |
1 |
VSB_cat(tl->sb, "Expected '{' or name of probe, got "); |
| 555 |
1 |
vcc_ErrToken(tl, tl->t); |
| 556 |
1 |
VSB_cat(tl->sb, " at\n"); |
| 557 |
1 |
vcc_ErrWhere(tl, tl->t); |
| 558 |
1 |
VSB_destroy(&tl->fb); |
| 559 |
1 |
return; |
| 560 |
29 |
} else if (vcc_IdIs(t_field, "preamble")) { |
| 561 |
1 |
ExpectErr(tl, CBLOB); |
| 562 |
1 |
t_preamble = tl->t; |
| 563 |
1 |
vcc_NextToken(tl); |
| 564 |
1 |
SkipToken(tl, ';'); |
| 565 |
29 |
} else if (vcc_IdIs(t_field, "via")) { |
| 566 |
12 |
via = VCC_SymbolGet(tl, SYM_MAIN, SYM_BACKEND, |
| 567 |
|
SYMTAB_EXISTING, XREF_REF); |
| 568 |
12 |
ERRCHK(tl); |
| 569 |
12 |
AN(via); |
| 570 |
12 |
AN(via->rname); |
| 571 |
|
|
| 572 |
12 |
if (via->extra != NULL) { |
| 573 |
1 |
AZ(strcmp(via->extra, "via")); |
| 574 |
1 |
VSB_cat(tl->sb, |
| 575 |
|
"Cannot stack .via backends at\n"); |
| 576 |
1 |
vcc_ErrWhere(tl, tl->t); |
| 577 |
1 |
VSB_destroy(&tl->fb); |
| 578 |
1 |
return; |
| 579 |
|
} |
| 580 |
|
|
| 581 |
11 |
AN(sym); |
| 582 |
11 |
AZ(sym->extra); |
| 583 |
11 |
sym->extra = "via"; |
| 584 |
11 |
SkipToken(tl, ';'); |
| 585 |
27 |
} else if (vcc_IdIs(t_field, "authority")) { |
| 586 |
6 |
ExpectErr(tl, CSTR); |
| 587 |
6 |
assert(tl->t->dec != NULL); |
| 588 |
6 |
t_authority = tl->t; |
| 589 |
6 |
vcc_NextToken(tl); |
| 590 |
6 |
SkipToken(tl, ';'); |
| 591 |
16 |
} else if (vcc_IdIs(t_field, "wait_timeout")) { |
| 592 |
5 |
Fb(tl, 0, "\t.backend_wait_timeout = "); |
| 593 |
5 |
vcc_Duration(tl, &backend_wait_timeout); |
| 594 |
5 |
ERRCHK(tl); |
| 595 |
5 |
Fb(tl, 0, "%g,\n", backend_wait_timeout); |
| 596 |
5 |
SkipToken(tl, ';'); |
| 597 |
10 |
} else if (vcc_IdIs(t_field, "wait_limit")) { |
| 598 |
5 |
u = vcc_UintVal(tl); |
| 599 |
5 |
ERRCHK(tl); |
| 600 |
5 |
SkipToken(tl, ';'); |
| 601 |
5 |
Fb(tl, 0, "\t.backend_wait_limit = %u,\n", u); |
| 602 |
5 |
} else { |
| 603 |
0 |
ErrInternal(tl); |
| 604 |
0 |
VSB_destroy(&tl->fb); |
| 605 |
0 |
return; |
| 606 |
|
} |
| 607 |
|
|
| 608 |
|
} |
| 609 |
|
|
| 610 |
1384 |
vcc_FieldsOk(tl, fs); |
| 611 |
1384 |
free(fs); |
| 612 |
1384 |
ERRCHK(tl); |
| 613 |
|
|
| 614 |
1384 |
if (isnan(connect_timeout)) |
| 615 |
1381 |
Fb(tl, 0, "\t.connect_timeout = -1.0,\n"); |
| 616 |
1384 |
if (isnan(first_byte_timeout)) |
| 617 |
1381 |
Fb(tl, 0, "\t.first_byte_timeout = -1.0,\n"); |
| 618 |
1384 |
if (isnan(between_bytes_timeout)) |
| 619 |
1383 |
Fb(tl, 0, "\t.between_bytes_timeout = -1.0,\n"); |
| 620 |
1384 |
if (isnan(backend_wait_timeout)) |
| 621 |
1379 |
Fb(tl, 0, "\t.backend_wait_timeout = -1.0,\n"); |
| 622 |
|
|
| 623 |
1384 |
ExpectErr(tl, '}'); |
| 624 |
|
|
| 625 |
1384 |
if (t_host == NULL && t_path == NULL) { |
| 626 |
1 |
VSB_cat(tl->sb, "Expected .host or .path.\n"); |
| 627 |
1 |
vcc_ErrWhere(tl, t_be); |
| 628 |
1 |
VSB_destroy(&tl->fb); |
| 629 |
1 |
return; |
| 630 |
|
} |
| 631 |
|
|
| 632 |
1383 |
if (via != NULL && t_path != NULL) { |
| 633 |
1 |
VSB_cat(tl->sb, "Cannot set both .via and .path.\n"); |
| 634 |
1 |
vcc_ErrWhere(tl, t_be); |
| 635 |
1 |
return; |
| 636 |
|
} |
| 637 |
|
|
| 638 |
1382 |
if (via != NULL) |
| 639 |
10 |
AZ(via->extra); |
| 640 |
|
|
| 641 |
1382 |
vsb1 = VSB_new_auto(); |
| 642 |
1382 |
AN(vsb1); |
| 643 |
2764 |
VSB_printf(vsb1, |
| 644 |
|
"\nstatic const struct vrt_endpoint vgc_dir_ep_%s = {\n", |
| 645 |
1382 |
vgcname); |
| 646 |
1382 |
VSB_cat(vsb1, "\t.magic = VRT_ENDPOINT_MAGIC,\n"); |
| 647 |
|
|
| 648 |
1382 |
assert(t_host != NULL || t_path != NULL); |
| 649 |
1382 |
if (t_host != NULL) |
| 650 |
|
/* Check that the hostname makes sense */ |
| 651 |
1348 |
Emit_Sockaddr(tl, vsb1, t_host, t_port); |
| 652 |
|
else |
| 653 |
|
/* Check that the path can be a legal UDS */ |
| 654 |
34 |
Emit_UDS_Path(tl, vsb1, t_path, "Backend path"); |
| 655 |
1382 |
ERRCHK(tl); |
| 656 |
|
|
| 657 |
1377 |
if (t_preamble != NULL) |
| 658 |
1 |
VSB_printf(vsb1, "\t.preamble = %s,\n", t_preamble->dec); |
| 659 |
|
|
| 660 |
1377 |
VSB_cat(vsb1, "};\n"); |
| 661 |
1377 |
AZ(VSB_finish(vsb1)); |
| 662 |
1377 |
Fh(tl, 0, "%s", VSB_data(vsb1)); |
| 663 |
1377 |
VSB_destroy(&vsb1); |
| 664 |
|
|
| 665 |
|
/* Emit the hosthdr field, fall back to .host if not specified */ |
| 666 |
|
/* If .path is specified, set "0.0.0.0". */ |
| 667 |
1377 |
Fb(tl, 0, "\t.hosthdr = "); |
| 668 |
1377 |
if (t_hosthdr != NULL) |
| 669 |
6 |
EncToken(tl->fb, t_hosthdr); |
| 670 |
1371 |
else if (t_host != NULL) |
| 671 |
1342 |
EncToken(tl->fb, t_host); |
| 672 |
|
else |
| 673 |
29 |
Fb(tl, 0, "\"0.0.0.0\""); |
| 674 |
1377 |
Fb(tl, 0, ",\n"); |
| 675 |
|
|
| 676 |
|
/* |
| 677 |
|
* Emit the authority field, falling back to hosthdr, then host. |
| 678 |
|
* |
| 679 |
|
* When authority is "", sending the TLV is disabled. |
| 680 |
|
* |
| 681 |
|
* authority must be a valid SNI HostName (RFC 4366 ch. 3.1), but the |
| 682 |
|
* RFC does not define what that is and defers to "DNS hostname". |
| 683 |
|
* |
| 684 |
|
* So instead of trying to attempt a solution to that pandora's box, we |
| 685 |
|
* just implement >>Literal IPv4 and IPv6 addresses are not permitted in |
| 686 |
|
* "HostName".<< |
| 687 |
|
*/ |
| 688 |
1377 |
if (via != NULL) { |
| 689 |
10 |
AN(t_host); |
| 690 |
10 |
if (t_authority != NULL) |
| 691 |
6 |
t_val = t_authority; |
| 692 |
4 |
else if (t_hosthdr != NULL) |
| 693 |
3 |
t_val = t_hosthdr; |
| 694 |
|
else |
| 695 |
1 |
t_val = t_host; |
| 696 |
10 |
p = t_val->dec; |
| 697 |
|
|
| 698 |
10 |
if (isip(p)) { |
| 699 |
2 |
if (t_val == t_authority) |
| 700 |
0 |
VSB_cat(tl->sb, ".authority can not be an ip address with .via.\n"); |
| 701 |
|
else { |
| 702 |
4 |
VSB_printf(tl->sb, ".%s used as authority can not be an ip address with .via.\n", |
| 703 |
2 |
t_val == t_hosthdr ? "host_header" : "host"); |
| 704 |
2 |
VSB_cat(tl->sb, "Hint: configure .authority explicitly\n"); |
| 705 |
|
} |
| 706 |
2 |
vcc_ErrWhere(tl, t_val); |
| 707 |
2 |
} |
| 708 |
|
|
| 709 |
10 |
pp = strchr(p, ':'); |
| 710 |
10 |
l = (pp == NULL) ? -1 : (int)(pp - p); |
| 711 |
|
|
| 712 |
10 |
Fb(tl, 0, "\t.authority = "); |
| 713 |
10 |
VSB_quote(tl->fb, p, l, VSB_QUOTE_CSTR); |
| 714 |
10 |
Fb(tl, 0, ",\n"); |
| 715 |
10 |
} |
| 716 |
|
|
| 717 |
|
/* Close the struct */ |
| 718 |
1377 |
Fb(tl, 0, "};\n"); |
| 719 |
|
|
| 720 |
1377 |
vcc_NextToken(tl); |
| 721 |
|
|
| 722 |
1377 |
AZ(VSB_finish(tl->fb)); |
| 723 |
1377 |
Fh(tl, 0, "%s", VSB_data(tl->fb)); |
| 724 |
1377 |
VSB_destroy(&tl->fb); |
| 725 |
|
|
| 726 |
1377 |
ifp = New_IniFin(tl); |
| 727 |
2754 |
VSB_printf(ifp->ini, |
| 728 |
|
"\t%s =\n\t VRT_new_backend_clustered(ctx, vsc_cluster,\n" |
| 729 |
|
"\t\t&vgc_dir_priv_%s, %s);\n", |
| 730 |
1377 |
vgcname, vgcname, via ? via->rname : "NULL"); |
| 731 |
2754 |
VSB_printf(ifp->ini, |
| 732 |
1377 |
"\tif (%s)\n\t\tVRT_StaticDirector(%s);", vgcname, vgcname); |
| 733 |
1377 |
VSB_printf(ifp->fin, "\t\tVRT_delete_backend(ctx, &%s);", vgcname); |
| 734 |
1642 |
} |
| 735 |
|
|
| 736 |
|
/*-------------------------------------------------------------------- |
| 737 |
|
* Parse directors and backends |
| 738 |
|
*/ |
| 739 |
|
|
| 740 |
|
void |
| 741 |
1647 |
vcc_ParseBackend(struct vcc *tl) |
| 742 |
|
{ |
| 743 |
|
struct token *t_first, *t_be; |
| 744 |
|
struct symbol *sym; |
| 745 |
|
const char *dn; |
| 746 |
|
|
| 747 |
1647 |
tl->ndirector++; |
| 748 |
1647 |
t_first = tl->t; |
| 749 |
1647 |
SkipToken(tl, ID); /* ID: backend */ |
| 750 |
|
|
| 751 |
1647 |
vcc_ExpectVid(tl, "backend"); /* ID: name */ |
| 752 |
1647 |
ERRCHK(tl); |
| 753 |
|
|
| 754 |
1646 |
t_be = tl->t; |
| 755 |
|
|
| 756 |
1646 |
sym = VCC_HandleSymbol(tl, BACKEND); |
| 757 |
1646 |
ERRCHK(tl); |
| 758 |
1643 |
AN(sym); |
| 759 |
|
|
| 760 |
1643 |
if (sym->type == DEFAULT) { |
| 761 |
70 |
if (tl->first_director != NULL) { |
| 762 |
4 |
tl->first_director->noref = 0; |
| 763 |
4 |
tl->first_director = NULL; |
| 764 |
4 |
tl->default_director = NULL; |
| 765 |
4 |
} |
| 766 |
70 |
if (tl->default_director != NULL) { |
| 767 |
1 |
VSB_cat(tl->sb, |
| 768 |
|
"Only one default director possible.\n"); |
| 769 |
1 |
vcc_ErrWhere(tl, t_first); |
| 770 |
1 |
return; |
| 771 |
|
} |
| 772 |
69 |
dn = "vgc_backend_default"; |
| 773 |
69 |
tl->default_director = dn; |
| 774 |
69 |
} else { |
| 775 |
1573 |
dn = sym->rname; |
| 776 |
1573 |
if (tl->default_director == NULL) { |
| 777 |
1307 |
tl->first_director = sym; |
| 778 |
1307 |
tl->default_director = dn; |
| 779 |
1307 |
sym->noref = 1; |
| 780 |
1307 |
} |
| 781 |
|
} |
| 782 |
|
|
| 783 |
1642 |
Fh(tl, 0, "\nstatic VCL_BACKEND %s;\n", dn); |
| 784 |
1642 |
vcc_ParseHostDef(tl, sym, t_be, dn); |
| 785 |
1642 |
if (tl->err) { |
| 786 |
56 |
VSB_printf(tl->sb, |
| 787 |
28 |
"\nIn %.*s specification starting at:\n", PF(t_first)); |
| 788 |
28 |
vcc_ErrWhere(tl, t_first); |
| 789 |
28 |
return; |
| 790 |
|
} |
| 791 |
1647 |
} |
| 792 |
|
|
| 793 |
|
void |
| 794 |
3025 |
vcc_Backend_Init(struct vcc *tl) |
| 795 |
|
{ |
| 796 |
|
struct inifin *ifp; |
| 797 |
|
|
| 798 |
3025 |
Fh(tl, 0, "\nstatic struct vsmw_cluster *vsc_cluster;\n"); |
| 799 |
3025 |
ifp = New_IniFin(tl); |
| 800 |
3025 |
VSB_cat(ifp->ini, "\tvsc_cluster = VRT_VSM_Cluster_New(ctx,\n" |
| 801 |
|
"\t ndirector * VRT_backend_vsm_need(ctx));\n"); |
| 802 |
3025 |
VSB_cat(ifp->ini, "\tif (vsc_cluster == 0)\n\t\treturn(1);"); |
| 803 |
3025 |
VSB_cat(ifp->fin, "\t\tVRT_VSM_Cluster_Destroy(ctx, &vsc_cluster);"); |
| 804 |
3025 |
} |