| | varnish-cache/lib/libvcc/vcc_backend.c |
|---|
| 0 |
|
/*- |
| 1 |
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* Copyright (c) 2006 Verdens Gang AS |
| 2 |
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* Copyright (c) 2006-2015 Varnish Software AS |
| 3 |
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* All rights reserved. |
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* |
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* Author: Poul-Henning Kamp <phk@phk.freebsd.dk> |
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* |
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* SPDX-License-Identifier: BSD-2-Clause |
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* |
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* Redistribution and use in source and binary forms, with or without |
| 10 |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
| 15 |
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* notice, this list of conditions and the following disclaimer in the |
| 16 |
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* documentation and/or other materials provided with the distribution. |
| 17 |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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*/ |
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|
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#include "config.h" |
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|
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#include <math.h> |
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#include <stdlib.h> |
| 36 |
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#include <string.h> |
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#include <sys/stat.h> |
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|
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#include "vcc_compile.h" |
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#include "vus.h" |
| 41 |
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|
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/*-------------------------------------------------------------------- |
| 43 |
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* Struct sockaddr is not really designed to be a compile time |
| 44 |
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* initialized data structure, so we encode it as a byte-string |
| 45 |
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* and put it in an official sockaddr when we load the VCL. |
| 46 |
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*/ |
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|
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static void |
| 49 |
53320 |
Emit_Sockaddr(struct vcc *tl, struct vsb *vsb1, const struct token *t_host, |
| 50 |
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const struct token *t_port) |
| 51 |
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{ |
| 52 |
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const char *ipv4, *ipv4a, *ipv6, *ipv6a, *pa; |
| 53 |
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char buf[BUFSIZ]; |
| 54 |
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|
| 55 |
53320 |
AN(t_host->dec); |
| 56 |
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|
| 57 |
53320 |
if (t_port != NULL) |
| 58 |
40440 |
bprintf(buf, "%s %s", t_host->dec, t_port->dec); |
| 59 |
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else |
| 60 |
12880 |
bprintf(buf, "%s", t_host->dec); |
| 61 |
106640 |
Resolve_Sockaddr(tl, buf, "80", |
| 62 |
53320 |
&ipv4, &ipv4a, &ipv6, &ipv6a, &pa, 2, t_host, "Backend host"); |
| 63 |
53320 |
ERRCHK(tl); |
| 64 |
53240 |
if (ipv4 != NULL) { |
| 65 |
106000 |
VSB_printf(vsb1, |
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"\t.ipv4 = (const struct suckaddr *)%s,\n", |
| 67 |
53000 |
ipv4); |
| 68 |
53000 |
} |
| 69 |
53240 |
if (ipv6 != NULL) { |
| 70 |
560 |
VSB_printf(vsb1, |
| 71 |
|
"\t.ipv6 = (const struct suckaddr *)%s,\n", |
| 72 |
280 |
ipv6); |
| 73 |
280 |
} |
| 74 |
53240 |
VSB_cat(vsb1, "\t.uds_path = (void *) 0,\n"); |
| 75 |
53320 |
} |
| 76 |
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|
| 77 |
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/* |
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* For UDS, we do not create a VSA. We run the VUS_resolver() checks and, if |
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* it's a path, can be accessed, and is a socket. If so, just emit the path |
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* field and set the IP suckaddrs to NULL. |
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*/ |
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|
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static int |
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1280 |
uds_resolved(void *priv, const struct sockaddr_un *uds) |
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{ |
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1280 |
(void) priv; |
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1280 |
(void) uds; |
| 88 |
1280 |
return (42); |
| 89 |
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} |
| 90 |
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|
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static void |
| 92 |
1240 |
emit_path(struct vsb *vsb1, char *path) |
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{ |
| 94 |
1240 |
VSB_printf(vsb1, "\t.uds_path = \"%s\",\n", path); |
| 95 |
1240 |
VSB_cat(vsb1, "\t.ipv4 = (void *) 0,\n"); |
| 96 |
1240 |
VSB_cat(vsb1, "\t.ipv6 = (void *) 0,\n"); |
| 97 |
1240 |
} |
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|
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static void |
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1360 |
Emit_UDS_Path(struct vcc *tl, struct vsb *vsb1, |
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const struct token *t_path, const char *errid) |
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{ |
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struct stat st; |
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const char *vus_err; |
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|
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1360 |
AN(t_path); |
| 107 |
1360 |
AN(t_path->dec); |
| 108 |
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|
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1360 |
if (! VUS_is(t_path->dec)) { |
| 110 |
80 |
VSB_printf(tl->sb, |
| 111 |
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"%s: Must be a valid path or abstract socket:\n", |
| 112 |
40 |
errid); |
| 113 |
40 |
vcc_ErrWhere(tl, t_path); |
| 114 |
40 |
return; |
| 115 |
|
} |
| 116 |
1320 |
if (VUS_resolver(t_path->dec, uds_resolved, NULL, &vus_err) != 42) { |
| 117 |
40 |
VSB_printf(tl->sb, "%s: %s\n", errid, vus_err); |
| 118 |
40 |
vcc_ErrWhere(tl, t_path); |
| 119 |
40 |
return; |
| 120 |
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} |
| 121 |
1280 |
if (*t_path->dec == '@') { |
| 122 |
0 |
emit_path(vsb1, t_path->dec); |
| 123 |
0 |
return; |
| 124 |
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} |
| 125 |
1280 |
assert(*t_path->dec == '/'); |
| 126 |
1280 |
errno = 0; |
| 127 |
1280 |
if (stat(t_path->dec, &st) != 0) { |
| 128 |
40 |
int err = errno; |
| 129 |
80 |
VSB_printf(tl->sb, "%s: Cannot stat: %s\n", errid, |
| 130 |
40 |
strerror(errno)); |
| 131 |
40 |
vcc_ErrWhere(tl, t_path); |
| 132 |
40 |
if (err == ENOENT || err == EACCES) |
| 133 |
40 |
vcc_Warn(tl); |
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else |
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0 |
return; |
| 136 |
1280 |
} else if (!S_ISSOCK(st.st_mode)) { |
| 137 |
40 |
VSB_printf(tl->sb, "%s: Not a socket:\n", errid); |
| 138 |
40 |
vcc_ErrWhere(tl, t_path); |
| 139 |
40 |
return; |
| 140 |
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} |
| 141 |
1240 |
emit_path(vsb1, t_path->dec); |
| 142 |
1360 |
} |
| 143 |
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|
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/*-------------------------------------------------------------------- |
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* Disallow mutually exclusive field definitions |
| 146 |
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*/ |
| 147 |
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|
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static void |
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56080 |
vcc_Redef(struct vcc *tl, const char *redef, const struct token **t_did, |
| 150 |
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const struct token *t_field) |
| 151 |
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{ |
| 152 |
56080 |
if (*t_did != NULL) { |
| 153 |
120 |
VSB_printf(tl->sb, "%s redefinition at:\n", redef); |
| 154 |
120 |
vcc_ErrWhere(tl, t_field); |
| 155 |
120 |
VSB_cat(tl->sb, "Previous definition:\n"); |
| 156 |
120 |
vcc_ErrWhere(tl, *t_did); |
| 157 |
120 |
return; |
| 158 |
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} |
| 159 |
55960 |
*t_did = t_field; |
| 160 |
56080 |
} |
| 161 |
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|
| 162 |
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/*-------------------------------------------------------------------- |
| 163 |
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* Parse a backend probe specification |
| 164 |
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*/ |
| 165 |
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|
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static void |
| 167 |
1880 |
vcc_ParseProbeSpec(struct vcc *tl, const struct symbol *sym, char **namep) |
| 168 |
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{ |
| 169 |
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struct fld_spec *fs; |
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const struct token *t_field; |
| 171 |
1880 |
const struct token *t_did = NULL, *t_window = NULL, *t_threshold = NULL; |
| 172 |
1880 |
struct token *t_initial = NULL; |
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unsigned window, threshold, initial, status, exp_close; |
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char buf[32]; |
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const char *name; |
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double t; |
| 177 |
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|
| 178 |
1880 |
fs = vcc_FldSpec(tl, |
| 179 |
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"?url", |
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"?request", |
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"?expected_response", |
| 182 |
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"?timeout", |
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"?interval", |
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"?window", |
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"?threshold", |
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"?initial", |
| 187 |
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"?expect_close", |
| 188 |
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NULL); |
| 189 |
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|
| 190 |
1880 |
SkipToken(tl, '{'); |
| 191 |
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|
| 192 |
1880 |
if (sym != NULL) { |
| 193 |
840 |
name = sym->rname; |
| 194 |
840 |
} else { |
| 195 |
1040 |
bprintf(buf, "vgc_probe__%d", tl->nprobe++); |
| 196 |
1040 |
name = buf; |
| 197 |
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} |
| 198 |
1880 |
Fh(tl, 0, "static const struct vrt_backend_probe %s[] = {{\n", name); |
| 199 |
1880 |
Fh(tl, 0, "\t.magic = VRT_BACKEND_PROBE_MAGIC,\n"); |
| 200 |
1880 |
if (namep != NULL) |
| 201 |
1880 |
*namep = TlDup(tl, name); |
| 202 |
|
|
| 203 |
1880 |
window = 0; |
| 204 |
1880 |
threshold = 0; |
| 205 |
1880 |
initial = 0; |
| 206 |
1880 |
status = 0; |
| 207 |
1880 |
exp_close = 1; |
| 208 |
6280 |
while (tl->t->tok != '}') { |
| 209 |
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|
| 210 |
4640 |
vcc_IsField(tl, &t_field, fs); |
| 211 |
4640 |
ERRCHK(tl); |
| 212 |
4640 |
if (vcc_IdIs(t_field, "url")) { |
| 213 |
520 |
vcc_Redef(tl, "Probe request", &t_did, t_field); |
| 214 |
520 |
ERRCHK(tl); |
| 215 |
480 |
ExpectErr(tl, CSTR); |
| 216 |
480 |
Fh(tl, 0, "\t.url = "); |
| 217 |
480 |
EncToken(tl->fh, tl->t); |
| 218 |
480 |
Fh(tl, 0, ",\n"); |
| 219 |
480 |
vcc_NextToken(tl); |
| 220 |
4600 |
} else if (vcc_IdIs(t_field, "request")) { |
| 221 |
200 |
vcc_Redef(tl, "Probe request", &t_did, t_field); |
| 222 |
200 |
ERRCHK(tl); |
| 223 |
160 |
ExpectErr(tl, CSTR); |
| 224 |
160 |
Fh(tl, 0, "\t.request =\n"); |
| 225 |
640 |
while (tl->t->tok == CSTR) { |
| 226 |
480 |
Fh(tl, 0, "\t\t"); |
| 227 |
480 |
EncToken(tl->fh, tl->t); |
| 228 |
480 |
Fh(tl, 0, " \"\\r\\n\"\n"); |
| 229 |
480 |
vcc_NextToken(tl); |
| 230 |
|
} |
| 231 |
160 |
Fh(tl, 0, "\t\t\"\\r\\n\",\n"); |
| 232 |
4080 |
} else if (vcc_IdIs(t_field, "timeout")) { |
| 233 |
400 |
Fh(tl, 0, "\t.timeout = "); |
| 234 |
400 |
vcc_Duration(tl, &t); |
| 235 |
400 |
ERRCHK(tl); |
| 236 |
360 |
Fh(tl, 0, "%g,\n", t); |
| 237 |
3880 |
} else if (vcc_IdIs(t_field, "interval")) { |
| 238 |
1040 |
Fh(tl, 0, "\t.interval = "); |
| 239 |
1040 |
vcc_Duration(tl, &t); |
| 240 |
1040 |
ERRCHK(tl); |
| 241 |
1040 |
Fh(tl, 0, "%g,\n", t); |
| 242 |
3520 |
} else if (vcc_IdIs(t_field, "window")) { |
| 243 |
800 |
t_window = tl->t; |
| 244 |
800 |
window = vcc_UintVal(tl); |
| 245 |
800 |
ERRCHK(tl); |
| 246 |
2480 |
} else if (vcc_IdIs(t_field, "initial")) { |
| 247 |
560 |
t_initial = tl->t; |
| 248 |
560 |
initial = vcc_UintVal(tl); |
| 249 |
560 |
ERRCHK(tl); |
| 250 |
1680 |
} else if (vcc_IdIs(t_field, "expected_response")) { |
| 251 |
80 |
status = vcc_UintVal(tl); |
| 252 |
80 |
if (status < 100 || status > 999) { |
| 253 |
40 |
VSB_cat(tl->sb, |
| 254 |
|
"Must specify .expected_response with " |
| 255 |
|
"exactly three digits " |
| 256 |
|
"(100 <= x <= 999)\n"); |
| 257 |
40 |
vcc_ErrWhere(tl, tl->t); |
| 258 |
40 |
return; |
| 259 |
|
} |
| 260 |
40 |
ERRCHK(tl); |
| 261 |
1080 |
} else if (vcc_IdIs(t_field, "threshold")) { |
| 262 |
880 |
t_threshold = tl->t; |
| 263 |
880 |
threshold = vcc_UintVal(tl); |
| 264 |
880 |
ERRCHK(tl); |
| 265 |
1040 |
} else if (vcc_IdIs(t_field, "expect_close")) { |
| 266 |
160 |
exp_close = vcc_BoolVal(tl); |
| 267 |
160 |
ERRCHK(tl); |
| 268 |
80 |
} else { |
| 269 |
0 |
vcc_ErrToken(tl, t_field); |
| 270 |
0 |
vcc_ErrWhere(tl, t_field); |
| 271 |
0 |
ErrInternal(tl); |
| 272 |
0 |
return; |
| 273 |
|
} |
| 274 |
|
|
| 275 |
4400 |
SkipToken(tl, ';'); |
| 276 |
|
} |
| 277 |
1640 |
free(fs); |
| 278 |
|
|
| 279 |
1640 |
if (t_threshold != NULL || t_window != NULL) { |
| 280 |
920 |
if (t_threshold == NULL && t_window != NULL) { |
| 281 |
40 |
VSB_cat(tl->sb, |
| 282 |
|
"Must specify .threshold with .window\n"); |
| 283 |
40 |
vcc_ErrWhere(tl, t_window); |
| 284 |
40 |
return; |
| 285 |
880 |
} else if (t_threshold != NULL && t_window == NULL) { |
| 286 |
120 |
if (threshold > 64) { |
| 287 |
40 |
VSB_cat(tl->sb, |
| 288 |
|
"Threshold must be 64 or less.\n"); |
| 289 |
40 |
vcc_ErrWhere(tl, t_threshold); |
| 290 |
40 |
return; |
| 291 |
|
} |
| 292 |
80 |
window = threshold + 1; |
| 293 |
840 |
} else if (window > 64) { |
| 294 |
40 |
AN(t_window); |
| 295 |
40 |
VSB_cat(tl->sb, "Window must be 64 or less.\n"); |
| 296 |
40 |
vcc_ErrWhere(tl, t_window); |
| 297 |
40 |
return; |
| 298 |
|
} |
| 299 |
800 |
if (threshold > window ) { |
| 300 |
40 |
VSB_cat(tl->sb, |
| 301 |
|
"Threshold cannot be greater than window.\n"); |
| 302 |
40 |
AN(t_threshold); |
| 303 |
40 |
vcc_ErrWhere(tl, t_threshold); |
| 304 |
40 |
AN(t_window); |
| 305 |
40 |
vcc_ErrWhere(tl, t_window); |
| 306 |
40 |
} |
| 307 |
800 |
Fh(tl, 0, "\t.window = %u,\n", window); |
| 308 |
800 |
Fh(tl, 0, "\t.threshold = %u,\n", threshold); |
| 309 |
800 |
} |
| 310 |
1520 |
if (t_initial != NULL) |
| 311 |
560 |
Fh(tl, 0, "\t.initial = %u,\n", initial); |
| 312 |
|
else |
| 313 |
960 |
Fh(tl, 0, "\t.initial = ~0U,\n"); |
| 314 |
1520 |
if (status > 0) |
| 315 |
40 |
Fh(tl, 0, "\t.exp_status = %u,\n", status); |
| 316 |
1520 |
Fh(tl, 0, "\t.exp_close = %u,\n", exp_close); |
| 317 |
1520 |
Fh(tl, 0, "}};\n"); |
| 318 |
1520 |
SkipToken(tl, '}'); |
| 319 |
1880 |
} |
| 320 |
|
|
| 321 |
|
/*-------------------------------------------------------------------- |
| 322 |
|
* Parse and emit a probe definition |
| 323 |
|
*/ |
| 324 |
|
|
| 325 |
|
void |
| 326 |
880 |
vcc_ParseProbe(struct vcc *tl) |
| 327 |
|
{ |
| 328 |
|
struct symbol *sym; |
| 329 |
|
char *p; |
| 330 |
|
|
| 331 |
880 |
vcc_NextToken(tl); /* ID: probe */ |
| 332 |
|
|
| 333 |
880 |
vcc_ExpectVid(tl, "backend probe"); /* ID: name */ |
| 334 |
880 |
ERRCHK(tl); |
| 335 |
|
|
| 336 |
880 |
sym = VCC_HandleSymbol(tl, PROBE); |
| 337 |
880 |
ERRCHK(tl); |
| 338 |
840 |
AN(sym); |
| 339 |
840 |
vcc_ParseProbeSpec(tl, sym, &p); |
| 340 |
|
|
| 341 |
840 |
if (sym->type == DEFAULT) |
| 342 |
400 |
tl->default_probe = p; |
| 343 |
|
else |
| 344 |
440 |
free(p); |
| 345 |
880 |
} |
| 346 |
|
|
| 347 |
|
/*-------------------------------------------------------------------- |
| 348 |
|
* Parse and emit a backend host definition |
| 349 |
|
* |
| 350 |
|
* The struct vrt_backend is emitted to Fh(). |
| 351 |
|
*/ |
| 352 |
|
|
| 353 |
|
static void |
| 354 |
65000 |
vcc_ParseHostDef(struct vcc *tl, struct symbol *sym, |
| 355 |
|
const struct token *t_be, const char *vgcname) |
| 356 |
|
{ |
| 357 |
|
const struct token *t_field; |
| 358 |
|
const struct token *t_val; |
| 359 |
|
const struct token *t_probe; |
| 360 |
65000 |
const struct token *t_host = NULL; |
| 361 |
65000 |
const struct token *t_port = NULL; |
| 362 |
65000 |
const struct token *t_path = NULL; |
| 363 |
65000 |
const struct token *t_hosthdr = NULL; |
| 364 |
65000 |
const struct token *t_authority = NULL; |
| 365 |
65000 |
const struct token *t_did = NULL; |
| 366 |
65000 |
const struct token *t_preamble = NULL; |
| 367 |
|
struct symbol *pb; |
| 368 |
|
struct fld_spec *fs; |
| 369 |
|
struct inifin *ifp; |
| 370 |
|
struct vsb *vsb1; |
| 371 |
65000 |
struct symbol *via = NULL; |
| 372 |
65000 |
vtim_dur connect_timeout = NAN; |
| 373 |
65000 |
vtim_dur first_byte_timeout = NAN; |
| 374 |
65000 |
vtim_dur between_bytes_timeout = NAN; |
| 375 |
65000 |
vtim_dur backend_wait_timeout = NAN; |
| 376 |
|
char *p; |
| 377 |
|
unsigned u; |
| 378 |
|
|
| 379 |
69160 |
if (tl->t->tok == ID && |
| 380 |
9480 |
(vcc_IdIs(tl->t, "none") || vcc_IdIs(tl->t, "None"))) { |
| 381 |
9480 |
vcc_NextToken(tl); |
| 382 |
9480 |
SkipToken(tl, ';'); |
| 383 |
9480 |
ifp = New_IniFin(tl); |
| 384 |
9480 |
VSB_printf(ifp->ini, "\t(void)%s;", vgcname); |
| 385 |
9480 |
VSB_printf(ifp->fin, "\t\t(void)%s;", vgcname); |
| 386 |
9480 |
return; |
| 387 |
|
} |
| 388 |
|
|
| 389 |
55520 |
SkipToken(tl, '{'); |
| 390 |
|
|
| 391 |
|
/* Check for old syntax */ |
| 392 |
55520 |
if (tl->t->tok == ID && vcc_IdIs(tl->t, "set")) { |
| 393 |
40 |
VSB_cat(tl->sb, |
| 394 |
|
"NB: Backend Syntax has changed:\n" |
| 395 |
|
"Remove \"set\" and \"backend\" in front" |
| 396 |
|
" of backend fields.\n" ); |
| 397 |
40 |
vcc_ErrToken(tl, tl->t); |
| 398 |
40 |
VSB_cat(tl->sb, " at "); |
| 399 |
40 |
vcc_ErrWhere(tl, tl->t); |
| 400 |
40 |
return; |
| 401 |
|
} |
| 402 |
|
|
| 403 |
55480 |
fs = vcc_FldSpec(tl, |
| 404 |
|
"?host", |
| 405 |
|
"?port", |
| 406 |
|
"?path", |
| 407 |
|
"?host_header", |
| 408 |
|
"?connect_timeout", |
| 409 |
|
"?first_byte_timeout", |
| 410 |
|
"?between_bytes_timeout", |
| 411 |
|
"?probe", |
| 412 |
|
"?max_connections", |
| 413 |
|
"?proxy_header", |
| 414 |
|
"?preamble", |
| 415 |
|
"?via", |
| 416 |
|
"?authority", |
| 417 |
|
"?wait_timeout", |
| 418 |
|
"?wait_limit", |
| 419 |
|
NULL); |
| 420 |
|
|
| 421 |
55480 |
tl->fb = VSB_new_auto(); |
| 422 |
55480 |
AN(tl->fb); |
| 423 |
|
|
| 424 |
110960 |
Fb(tl, 0, "\nstatic const struct vrt_backend vgc_dir_priv_%s = {\n", |
| 425 |
55480 |
vgcname); |
| 426 |
|
|
| 427 |
55480 |
Fb(tl, 0, "\t.magic = VRT_BACKEND_MAGIC,\n"); |
| 428 |
55480 |
Fb(tl, 0, "\t.endpoint = &vgc_dir_ep_%s,\n", vgcname); |
| 429 |
55480 |
Fb(tl, 0, "\t.vcl_name = \"%.*s", PF(t_be)); |
| 430 |
55480 |
Fb(tl, 0, "\",\n"); |
| 431 |
|
|
| 432 |
154360 |
while (tl->t->tok != '}') { |
| 433 |
|
|
| 434 |
99600 |
vcc_IsField(tl, &t_field, fs); |
| 435 |
99600 |
ERRCHK(tl); |
| 436 |
99520 |
if (vcc_IdIs(t_field, "host")) { |
| 437 |
53920 |
vcc_Redef(tl, "Address", &t_did, t_field); |
| 438 |
53920 |
ERRCHK(tl); |
| 439 |
53920 |
ExpectErr(tl, CSTR); |
| 440 |
53920 |
assert(tl->t->dec != NULL); |
| 441 |
53920 |
t_host = tl->t; |
| 442 |
53920 |
vcc_NextToken(tl); |
| 443 |
53920 |
SkipToken(tl, ';'); |
| 444 |
99520 |
} else if (vcc_IdIs(t_field, "port")) { |
| 445 |
40520 |
ExpectErr(tl, CSTR); |
| 446 |
40520 |
assert(tl->t->dec != NULL); |
| 447 |
40520 |
t_port = tl->t; |
| 448 |
40520 |
vcc_NextToken(tl); |
| 449 |
40520 |
SkipToken(tl, ';'); |
| 450 |
45600 |
} else if (vcc_IdIs(t_field, "path")) { |
| 451 |
1480 |
if (tl->syntax < VCL_41) { |
| 452 |
40 |
VSB_cat(tl->sb, |
| 453 |
|
"Unix socket backends only supported" |
| 454 |
|
" in VCL4.1 and higher.\n"); |
| 455 |
40 |
vcc_ErrToken(tl, tl->t); |
| 456 |
40 |
VSB_cat(tl->sb, " at "); |
| 457 |
40 |
vcc_ErrWhere(tl, tl->t); |
| 458 |
40 |
VSB_destroy(&tl->fb); |
| 459 |
40 |
return; |
| 460 |
|
} |
| 461 |
1440 |
vcc_Redef(tl, "Address", &t_did, t_field); |
| 462 |
1440 |
ERRCHK(tl); |
| 463 |
1400 |
ExpectErr(tl, CSTR); |
| 464 |
1400 |
assert(tl->t->dec != NULL); |
| 465 |
1400 |
t_path = tl->t; |
| 466 |
1400 |
vcc_NextToken(tl); |
| 467 |
1400 |
SkipToken(tl, ';'); |
| 468 |
5000 |
} else if (vcc_IdIs(t_field, "host_header")) { |
| 469 |
160 |
ExpectErr(tl, CSTR); |
| 470 |
160 |
assert(tl->t->dec != NULL); |
| 471 |
160 |
t_hosthdr = tl->t; |
| 472 |
160 |
vcc_NextToken(tl); |
| 473 |
160 |
SkipToken(tl, ';'); |
| 474 |
3600 |
} else if (vcc_IdIs(t_field, "connect_timeout")) { |
| 475 |
120 |
Fb(tl, 0, "\t.connect_timeout = "); |
| 476 |
120 |
vcc_Duration(tl, &connect_timeout); |
| 477 |
120 |
ERRCHK(tl); |
| 478 |
120 |
Fb(tl, 0, "%g,\n", connect_timeout); |
| 479 |
120 |
SkipToken(tl, ';'); |
| 480 |
3440 |
} else if (vcc_IdIs(t_field, "first_byte_timeout")) { |
| 481 |
120 |
Fb(tl, 0, "\t.first_byte_timeout = "); |
| 482 |
120 |
vcc_Duration(tl, &first_byte_timeout); |
| 483 |
120 |
ERRCHK(tl); |
| 484 |
120 |
Fb(tl, 0, "%g,\n", first_byte_timeout); |
| 485 |
120 |
SkipToken(tl, ';'); |
| 486 |
3320 |
} else if (vcc_IdIs(t_field, "between_bytes_timeout")) { |
| 487 |
40 |
Fb(tl, 0, "\t.between_bytes_timeout = "); |
| 488 |
40 |
vcc_Duration(tl, &between_bytes_timeout); |
| 489 |
40 |
ERRCHK(tl); |
| 490 |
40 |
Fb(tl, 0, "%g,\n", between_bytes_timeout); |
| 491 |
40 |
SkipToken(tl, ';'); |
| 492 |
3200 |
} else if (vcc_IdIs(t_field, "max_connections")) { |
| 493 |
440 |
u = vcc_UintVal(tl); |
| 494 |
440 |
ERRCHK(tl); |
| 495 |
440 |
SkipToken(tl, ';'); |
| 496 |
440 |
Fb(tl, 0, "\t.max_connections = %u,\n", u); |
| 497 |
3160 |
} else if (vcc_IdIs(t_field, "proxy_header")) { |
| 498 |
240 |
t_val = tl->t; |
| 499 |
240 |
u = vcc_UintVal(tl); |
| 500 |
240 |
ERRCHK(tl); |
| 501 |
240 |
if (u != 1 && u != 2) { |
| 502 |
0 |
VSB_cat(tl->sb, |
| 503 |
|
".proxy_header must be 1 or 2\n"); |
| 504 |
0 |
vcc_ErrWhere(tl, t_val); |
| 505 |
0 |
VSB_destroy(&tl->fb); |
| 506 |
0 |
return; |
| 507 |
|
} |
| 508 |
240 |
SkipToken(tl, ';'); |
| 509 |
240 |
Fb(tl, 0, "\t.proxy_header = %u,\n", u); |
| 510 |
2720 |
} else if (vcc_IdIs(t_field, "probe") && tl->t->tok == '{') { |
| 511 |
1040 |
vcc_ParseProbeSpec(tl, NULL, &p); |
| 512 |
1040 |
Fb(tl, 0, "\t.probe = %s,\n", p); |
| 513 |
1040 |
free(p); |
| 514 |
1040 |
ERRCHK(tl); |
| 515 |
2080 |
} else if (vcc_IdIs(t_field, "probe") && tl->t->tok == ID) { |
| 516 |
440 |
t_probe = tl->t; |
| 517 |
440 |
pb = VCC_SymbolGet(tl, SYM_MAIN, SYM_PROBE, |
| 518 |
|
SYMTAB_EXISTING, XREF_REF); |
| 519 |
440 |
ERRCHK(tl); |
| 520 |
400 |
AN(pb); |
| 521 |
400 |
if (pb->type == DEFAULT) { |
| 522 |
40 |
if (tl->default_probe == NULL) { |
| 523 |
40 |
VSB_cat(tl->sb, |
| 524 |
|
"No default probe defined\n"); |
| 525 |
40 |
vcc_ErrToken(tl, t_probe); |
| 526 |
40 |
VSB_cat(tl->sb, " at\n"); |
| 527 |
40 |
vcc_ErrWhere(tl, t_probe); |
| 528 |
40 |
} |
| 529 |
40 |
pb = PROBE->default_sym; |
| 530 |
40 |
} |
| 531 |
400 |
ERRCHK(tl); |
| 532 |
360 |
Fb(tl, 0, "\t.probe = %s,\n", pb->rname); |
| 533 |
360 |
SkipToken(tl, ';'); |
| 534 |
1360 |
} else if (vcc_IdIs(t_field, "probe")) { |
| 535 |
40 |
VSB_cat(tl->sb, "Expected '{' or name of probe, got "); |
| 536 |
40 |
vcc_ErrToken(tl, tl->t); |
| 537 |
40 |
VSB_cat(tl->sb, " at\n"); |
| 538 |
40 |
vcc_ErrWhere(tl, tl->t); |
| 539 |
40 |
VSB_destroy(&tl->fb); |
| 540 |
40 |
return; |
| 541 |
960 |
} else if (vcc_IdIs(t_field, "preamble")) { |
| 542 |
40 |
ExpectErr(tl, CBLOB); |
| 543 |
40 |
t_preamble = tl->t; |
| 544 |
40 |
vcc_NextToken(tl); |
| 545 |
40 |
SkipToken(tl, ';'); |
| 546 |
960 |
} else if (vcc_IdIs(t_field, "via")) { |
| 547 |
400 |
via = VCC_SymbolGet(tl, SYM_MAIN, SYM_BACKEND, |
| 548 |
|
SYMTAB_EXISTING, XREF_REF); |
| 549 |
400 |
ERRCHK(tl); |
| 550 |
400 |
AN(via); |
| 551 |
400 |
AN(via->rname); |
| 552 |
|
|
| 553 |
400 |
if (via->extra != NULL) { |
| 554 |
40 |
AZ(strcmp(via->extra, "via")); |
| 555 |
40 |
VSB_cat(tl->sb, |
| 556 |
|
"Cannot stack .via backends at\n"); |
| 557 |
40 |
vcc_ErrWhere(tl, tl->t); |
| 558 |
40 |
VSB_destroy(&tl->fb); |
| 559 |
40 |
return; |
| 560 |
|
} |
| 561 |
|
|
| 562 |
360 |
AN(sym); |
| 563 |
360 |
AZ(sym->extra); |
| 564 |
360 |
sym->extra = "via"; |
| 565 |
360 |
SkipToken(tl, ';'); |
| 566 |
880 |
} else if (vcc_IdIs(t_field, "authority")) { |
| 567 |
120 |
ExpectErr(tl, CSTR); |
| 568 |
120 |
assert(tl->t->dec != NULL); |
| 569 |
120 |
t_authority = tl->t; |
| 570 |
120 |
vcc_NextToken(tl); |
| 571 |
120 |
SkipToken(tl, ';'); |
| 572 |
520 |
} else if (vcc_IdIs(t_field, "wait_timeout")) { |
| 573 |
200 |
Fb(tl, 0, "\t.backend_wait_timeout = "); |
| 574 |
200 |
vcc_Duration(tl, &backend_wait_timeout); |
| 575 |
200 |
ERRCHK(tl); |
| 576 |
200 |
Fb(tl, 0, "%g,\n", backend_wait_timeout); |
| 577 |
200 |
SkipToken(tl, ';'); |
| 578 |
400 |
} else if (vcc_IdIs(t_field, "wait_limit")) { |
| 579 |
200 |
u = vcc_UintVal(tl); |
| 580 |
200 |
ERRCHK(tl); |
| 581 |
200 |
SkipToken(tl, ';'); |
| 582 |
200 |
Fb(tl, 0, "\t.backend_wait_limit = %u,\n", u); |
| 583 |
200 |
} else { |
| 584 |
0 |
ErrInternal(tl); |
| 585 |
0 |
VSB_destroy(&tl->fb); |
| 586 |
0 |
return; |
| 587 |
|
} |
| 588 |
|
|
| 589 |
|
} |
| 590 |
|
|
| 591 |
54760 |
vcc_FieldsOk(tl, fs); |
| 592 |
54760 |
free(fs); |
| 593 |
54760 |
ERRCHK(tl); |
| 594 |
|
|
| 595 |
54760 |
if (isnan(connect_timeout)) |
| 596 |
54640 |
Fb(tl, 0, "\t.connect_timeout = -1.0,\n"); |
| 597 |
54760 |
if (isnan(first_byte_timeout)) |
| 598 |
54640 |
Fb(tl, 0, "\t.first_byte_timeout = -1.0,\n"); |
| 599 |
54760 |
if (isnan(between_bytes_timeout)) |
| 600 |
54720 |
Fb(tl, 0, "\t.between_bytes_timeout = -1.0,\n"); |
| 601 |
54760 |
if (isnan(backend_wait_timeout)) |
| 602 |
54560 |
Fb(tl, 0, "\t.backend_wait_timeout = -1.0,\n"); |
| 603 |
|
|
| 604 |
54760 |
ExpectErr(tl, '}'); |
| 605 |
|
|
| 606 |
54760 |
if (t_host == NULL && t_path == NULL) { |
| 607 |
40 |
VSB_cat(tl->sb, "Expected .host or .path.\n"); |
| 608 |
40 |
vcc_ErrWhere(tl, t_be); |
| 609 |
40 |
VSB_destroy(&tl->fb); |
| 610 |
40 |
return; |
| 611 |
|
} |
| 612 |
|
|
| 613 |
54720 |
if (via != NULL && t_path != NULL) { |
| 614 |
40 |
VSB_cat(tl->sb, "Cannot set both .via and .path.\n"); |
| 615 |
40 |
vcc_ErrWhere(tl, t_be); |
| 616 |
40 |
return; |
| 617 |
|
} |
| 618 |
|
|
| 619 |
54680 |
if (via != NULL) |
| 620 |
320 |
AZ(via->extra); |
| 621 |
|
|
| 622 |
54680 |
vsb1 = VSB_new_auto(); |
| 623 |
54680 |
AN(vsb1); |
| 624 |
109360 |
VSB_printf(vsb1, |
| 625 |
|
"\nstatic const struct vrt_endpoint vgc_dir_ep_%s = {\n", |
| 626 |
54680 |
vgcname); |
| 627 |
54680 |
VSB_cat(vsb1, "\t.magic = VRT_ENDPOINT_MAGIC,\n"); |
| 628 |
|
|
| 629 |
54680 |
assert(t_host != NULL || t_path != NULL); |
| 630 |
54680 |
if (t_host != NULL) |
| 631 |
|
/* Check that the hostname makes sense */ |
| 632 |
53320 |
Emit_Sockaddr(tl, vsb1, t_host, t_port); |
| 633 |
|
else |
| 634 |
|
/* Check that the path can be a legal UDS */ |
| 635 |
1360 |
Emit_UDS_Path(tl, vsb1, t_path, "Backend path"); |
| 636 |
54680 |
ERRCHK(tl); |
| 637 |
|
|
| 638 |
54480 |
if (t_preamble != NULL) |
| 639 |
40 |
VSB_printf(vsb1, "\t.preamble = %s,\n", t_preamble->dec); |
| 640 |
|
|
| 641 |
54480 |
VSB_cat(vsb1, "};\n"); |
| 642 |
54480 |
AZ(VSB_finish(vsb1)); |
| 643 |
54480 |
Fh(tl, 0, "%s", VSB_data(vsb1)); |
| 644 |
54480 |
VSB_destroy(&vsb1); |
| 645 |
|
|
| 646 |
|
/* Emit the hosthdr field, fall back to .host if not specified */ |
| 647 |
|
/* If .path is specified, set "0.0.0.0". */ |
| 648 |
54480 |
Fb(tl, 0, "\t.hosthdr = "); |
| 649 |
54480 |
if (t_hosthdr != NULL) |
| 650 |
160 |
EncToken(tl->fb, t_hosthdr); |
| 651 |
54320 |
else if (t_host != NULL) |
| 652 |
53160 |
EncToken(tl->fb, t_host); |
| 653 |
|
else |
| 654 |
1160 |
Fb(tl, 0, "\"0.0.0.0\""); |
| 655 |
54480 |
Fb(tl, 0, ",\n"); |
| 656 |
|
|
| 657 |
|
/* |
| 658 |
|
* Emit the authority field, falling back to hosthdr, then host. |
| 659 |
|
* |
| 660 |
|
* When authority is "", sending the TLV is disabled. |
| 661 |
|
* |
| 662 |
|
* Falling back to host may result in an IP address in authority, |
| 663 |
|
* which is an illegal SNI HostName (RFC 4366 ch. 3.1). But we |
| 664 |
|
* document the potential error, rather than try to find out |
| 665 |
|
* whether or not Emit_Sockaddr() had to look up a name. |
| 666 |
|
*/ |
| 667 |
54480 |
if (via != NULL) { |
| 668 |
320 |
AN(t_host); |
| 669 |
320 |
Fb(tl, 0, "\t.authority = "); |
| 670 |
320 |
if (t_authority != NULL) |
| 671 |
120 |
EncToken(tl->fb, t_authority); |
| 672 |
200 |
else if (t_hosthdr != NULL) |
| 673 |
40 |
EncToken(tl->fb, t_hosthdr); |
| 674 |
|
else |
| 675 |
160 |
EncToken(tl->fb, t_host); |
| 676 |
320 |
Fb(tl, 0, ",\n"); |
| 677 |
320 |
} |
| 678 |
|
|
| 679 |
|
/* Close the struct */ |
| 680 |
54480 |
Fb(tl, 0, "};\n"); |
| 681 |
|
|
| 682 |
54480 |
vcc_NextToken(tl); |
| 683 |
|
|
| 684 |
54480 |
AZ(VSB_finish(tl->fb)); |
| 685 |
54480 |
Fh(tl, 0, "%s", VSB_data(tl->fb)); |
| 686 |
54480 |
VSB_destroy(&tl->fb); |
| 687 |
|
|
| 688 |
54480 |
ifp = New_IniFin(tl); |
| 689 |
108960 |
VSB_printf(ifp->ini, |
| 690 |
|
"\t%s =\n\t VRT_new_backend_clustered(ctx, vsc_cluster,\n" |
| 691 |
|
"\t\t&vgc_dir_priv_%s, %s);\n", |
| 692 |
54480 |
vgcname, vgcname, via ? via->rname : "NULL"); |
| 693 |
108960 |
VSB_printf(ifp->ini, |
| 694 |
54480 |
"\tif (%s)\n\t\tVRT_StaticDirector(%s);", vgcname, vgcname); |
| 695 |
54480 |
VSB_printf(ifp->fin, "\t\tVRT_delete_backend(ctx, &%s);", vgcname); |
| 696 |
65000 |
} |
| 697 |
|
|
| 698 |
|
/*-------------------------------------------------------------------- |
| 699 |
|
* Parse directors and backends |
| 700 |
|
*/ |
| 701 |
|
|
| 702 |
|
void |
| 703 |
65200 |
vcc_ParseBackend(struct vcc *tl) |
| 704 |
|
{ |
| 705 |
|
struct token *t_first, *t_be; |
| 706 |
|
struct symbol *sym; |
| 707 |
|
const char *dn; |
| 708 |
|
|
| 709 |
65200 |
tl->ndirector++; |
| 710 |
65200 |
t_first = tl->t; |
| 711 |
65200 |
SkipToken(tl, ID); /* ID: backend */ |
| 712 |
|
|
| 713 |
65200 |
vcc_ExpectVid(tl, "backend"); /* ID: name */ |
| 714 |
65200 |
ERRCHK(tl); |
| 715 |
|
|
| 716 |
65160 |
t_be = tl->t; |
| 717 |
|
|
| 718 |
65160 |
sym = VCC_HandleSymbol(tl, BACKEND); |
| 719 |
65160 |
ERRCHK(tl); |
| 720 |
65040 |
AN(sym); |
| 721 |
|
|
| 722 |
65040 |
if (sym->type == DEFAULT) { |
| 723 |
2800 |
if (tl->first_director != NULL) { |
| 724 |
160 |
tl->first_director->noref = 0; |
| 725 |
160 |
tl->first_director = NULL; |
| 726 |
160 |
tl->default_director = NULL; |
| 727 |
160 |
} |
| 728 |
2800 |
if (tl->default_director != NULL) { |
| 729 |
40 |
VSB_cat(tl->sb, |
| 730 |
|
"Only one default director possible.\n"); |
| 731 |
40 |
vcc_ErrWhere(tl, t_first); |
| 732 |
40 |
return; |
| 733 |
|
} |
| 734 |
2760 |
dn = "vgc_backend_default"; |
| 735 |
2760 |
tl->default_director = dn; |
| 736 |
2760 |
} else { |
| 737 |
62240 |
dn = sym->rname; |
| 738 |
62240 |
if (tl->default_director == NULL) { |
| 739 |
51720 |
tl->first_director = sym; |
| 740 |
51720 |
tl->default_director = dn; |
| 741 |
51720 |
sym->noref = 1; |
| 742 |
51720 |
} |
| 743 |
|
} |
| 744 |
|
|
| 745 |
65000 |
Fh(tl, 0, "\nstatic VCL_BACKEND %s;\n", dn); |
| 746 |
65000 |
vcc_ParseHostDef(tl, sym, t_be, dn); |
| 747 |
65000 |
if (tl->err) { |
| 748 |
2080 |
VSB_printf(tl->sb, |
| 749 |
1040 |
"\nIn %.*s specification starting at:\n", PF(t_first)); |
| 750 |
1040 |
vcc_ErrWhere(tl, t_first); |
| 751 |
1040 |
return; |
| 752 |
|
} |
| 753 |
65200 |
} |
| 754 |
|
|
| 755 |
|
void |
| 756 |
119800 |
vcc_Backend_Init(struct vcc *tl) |
| 757 |
|
{ |
| 758 |
|
struct inifin *ifp; |
| 759 |
|
|
| 760 |
119800 |
Fh(tl, 0, "\nstatic struct vsmw_cluster *vsc_cluster;\n"); |
| 761 |
119800 |
ifp = New_IniFin(tl); |
| 762 |
119800 |
VSB_cat(ifp->ini, "\tvsc_cluster = VRT_VSM_Cluster_New(ctx,\n" |
| 763 |
|
"\t ndirector * VRT_backend_vsm_need(ctx));\n"); |
| 764 |
119800 |
VSB_cat(ifp->ini, "\tif (vsc_cluster == 0)\n\t\treturn(1);"); |
| 765 |
119800 |
VSB_cat(ifp->fin, "\t\tVRT_VSM_Cluster_Destroy(ctx, &vsc_cluster);"); |
| 766 |
119800 |
} |