| | varnish-cache/bin/varnishd/proxy/cache_proxy_proto.c |
|---|
| 0 |
|
/*- |
| 1 |
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* Copyright (c) 2015 Varnish Software AS |
| 2 |
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* Copyright (c) 2018 GANDI SAS |
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* All rights reserved. |
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* |
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* Authors: Poul-Henning Kamp <phk@phk.freebsd.dk> |
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* Emmanuel Hocdet <manu@gandi.net> |
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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 |
| 11 |
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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 |
| 16 |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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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 |
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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 <netinet/in.h> |
| 36 |
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#include <netdb.h> |
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|
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#include "cache/cache_varnishd.h" |
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#include "cache/cache_transport.h" |
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#include "proxy/cache_proxy.h" |
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|
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#include "vend.h" |
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#include "vsa.h" |
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#include "vss.h" |
| 45 |
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#include "vtcp.h" |
| 46 |
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|
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// max. PROXY payload length (excl. sig) - XXX parameter? |
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#define VPX_MAX_LEN 1024 |
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|
| 50 |
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struct vpx_tlv { |
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unsigned magic; |
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#define VPX_TLV_MAGIC 0xdeb9a4a5 |
| 53 |
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unsigned len; |
| 54 |
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char tlv[] v_counted_by_(len); |
| 55 |
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}; |
| 56 |
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|
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static inline int |
| 58 |
8 |
vpx_ws_err(const struct req *req) |
| 59 |
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{ |
| 60 |
8 |
VSL(SLT_Error, req->sp->vxid, "insufficient workspace"); |
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8 |
return (-1); |
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} |
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|
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/********************************************************************** |
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* PROXY 1 protocol |
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*/ |
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|
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static const char vpx1_sig[] = {'P', 'R', 'O', 'X', 'Y'}; |
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|
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static int |
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132 |
vpx_proto1(const struct worker *wrk, const struct req *req) |
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{ |
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const char *fld[5]; |
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int i; |
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char *p, *q; |
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struct suckaddr *sa; |
| 77 |
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ssize_t sz; |
| 78 |
132 |
int pfam = -1; |
| 79 |
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|
| 80 |
132 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
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132 |
CHECK_OBJ_NOTNULL(req, REQ_MAGIC); |
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132 |
CHECK_OBJ_NOTNULL(req->sp, SESS_MAGIC); |
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|
| 84 |
264 |
q = memchr(req->htc->rxbuf_b, '\r', |
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132 |
req->htc->rxbuf_e - req->htc->rxbuf_b); |
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132 |
if (q == NULL) |
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4 |
return (-1); |
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|
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128 |
*q++ = '\0'; |
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/* Nuke the CRLF */ |
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128 |
if (q == req->htc->rxbuf_e || *q != '\n') |
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0 |
return (-1); |
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128 |
*q++ = '\0'; |
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|
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/* Split the fields */ |
| 96 |
128 |
p = req->htc->rxbuf_b; |
| 97 |
764 |
for (i = 0; i < 5; i++) { |
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640 |
p = strchr(p, ' '); |
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640 |
if (p == NULL) { |
| 100 |
4 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
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"PROXY1: Too few fields"); |
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4 |
return (-1); |
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} |
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636 |
*p++ = '\0'; |
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636 |
fld[i] = p; |
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636 |
} |
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|
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124 |
if (strchr(p, ' ')) { |
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12 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
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"PROXY1: Too many fields"); |
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12 |
return (-1); |
| 112 |
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} |
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|
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112 |
if (!strcmp(fld[0], "TCP4")) |
| 115 |
64 |
pfam = PF_INET; |
| 116 |
48 |
else if (!strcmp(fld[0], "TCP6")) |
| 117 |
44 |
pfam = PF_INET6; |
| 118 |
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else { |
| 119 |
4 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
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"PROXY1: Wrong TCP[46] field"); |
| 121 |
4 |
return (-1); |
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} |
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|
| 124 |
108 |
if (! SES_Reserve_client_addr(req->sp, &sa, &sz)) |
| 125 |
0 |
return (vpx_ws_err(req)); |
| 126 |
108 |
assert (sz == vsa_suckaddr_len); |
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|
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324 |
if (VSS_ResolveOne(sa, fld[1], fld[3], |
| 129 |
216 |
pfam, SOCK_STREAM, AI_NUMERICHOST | AI_NUMERICSERV) == NULL) { |
| 130 |
28 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
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"PROXY1: Cannot resolve source address"); |
| 132 |
28 |
return (-1); |
| 133 |
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} |
| 134 |
80 |
if (! SES_Set_String_Attr(req->sp, SA_CLIENT_IP, fld[1])) |
| 135 |
0 |
return (vpx_ws_err(req)); |
| 136 |
80 |
if (! SES_Set_String_Attr(req->sp, SA_CLIENT_PORT, fld[3])) |
| 137 |
0 |
return (vpx_ws_err(req)); |
| 138 |
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|
| 139 |
80 |
if (! SES_Reserve_server_addr(req->sp, &sa, &sz)) |
| 140 |
0 |
return (vpx_ws_err(req)); |
| 141 |
80 |
assert (sz == vsa_suckaddr_len); |
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|
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240 |
if (VSS_ResolveOne(sa, fld[2], fld[4], |
| 144 |
160 |
pfam, SOCK_STREAM, AI_NUMERICHOST | AI_NUMERICSERV) == NULL) { |
| 145 |
12 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
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"PROXY1: Cannot resolve destination address"); |
| 147 |
12 |
return (-1); |
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} |
| 149 |
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|
| 150 |
136 |
VSL(SLT_Proxy, req->sp->vxid, "1 %s %s %s %s", |
| 151 |
68 |
fld[1], fld[3], fld[2], fld[4]); |
| 152 |
68 |
HTC_RxPipeline(req->htc, q); |
| 153 |
68 |
return (0); |
| 154 |
132 |
} |
| 155 |
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|
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/********************************************************************** |
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* PROXY 2 protocol |
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*/ |
| 159 |
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|
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static const char vpx2_sig[] = { |
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'\r', '\n', '\r', '\n', '\0', '\r', '\n', |
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'Q', 'U', 'I', 'T', '\n', |
| 163 |
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}; |
| 164 |
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|
| 165 |
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static const uint32_t crctable[256] = { |
| 166 |
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0x00000000UL, 0xF26B8303UL, 0xE13B70F7UL, 0x1350F3F4UL, |
| 167 |
|
0xC79A971FUL, 0x35F1141CUL, 0x26A1E7E8UL, 0xD4CA64EBUL, |
| 168 |
|
0x8AD958CFUL, 0x78B2DBCCUL, 0x6BE22838UL, 0x9989AB3BUL, |
| 169 |
|
0x4D43CFD0UL, 0xBF284CD3UL, 0xAC78BF27UL, 0x5E133C24UL, |
| 170 |
|
0x105EC76FUL, 0xE235446CUL, 0xF165B798UL, 0x030E349BUL, |
| 171 |
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0xD7C45070UL, 0x25AFD373UL, 0x36FF2087UL, 0xC494A384UL, |
| 172 |
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0x9A879FA0UL, 0x68EC1CA3UL, 0x7BBCEF57UL, 0x89D76C54UL, |
| 173 |
|
0x5D1D08BFUL, 0xAF768BBCUL, 0xBC267848UL, 0x4E4DFB4BUL, |
| 174 |
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0x20BD8EDEUL, 0xD2D60DDDUL, 0xC186FE29UL, 0x33ED7D2AUL, |
| 175 |
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0xE72719C1UL, 0x154C9AC2UL, 0x061C6936UL, 0xF477EA35UL, |
| 176 |
|
0xAA64D611UL, 0x580F5512UL, 0x4B5FA6E6UL, 0xB93425E5UL, |
| 177 |
|
0x6DFE410EUL, 0x9F95C20DUL, 0x8CC531F9UL, 0x7EAEB2FAUL, |
| 178 |
|
0x30E349B1UL, 0xC288CAB2UL, 0xD1D83946UL, 0x23B3BA45UL, |
| 179 |
|
0xF779DEAEUL, 0x05125DADUL, 0x1642AE59UL, 0xE4292D5AUL, |
| 180 |
|
0xBA3A117EUL, 0x4851927DUL, 0x5B016189UL, 0xA96AE28AUL, |
| 181 |
|
0x7DA08661UL, 0x8FCB0562UL, 0x9C9BF696UL, 0x6EF07595UL, |
| 182 |
|
0x417B1DBCUL, 0xB3109EBFUL, 0xA0406D4BUL, 0x522BEE48UL, |
| 183 |
|
0x86E18AA3UL, 0x748A09A0UL, 0x67DAFA54UL, 0x95B17957UL, |
| 184 |
|
0xCBA24573UL, 0x39C9C670UL, 0x2A993584UL, 0xD8F2B687UL, |
| 185 |
|
0x0C38D26CUL, 0xFE53516FUL, 0xED03A29BUL, 0x1F682198UL, |
| 186 |
|
0x5125DAD3UL, 0xA34E59D0UL, 0xB01EAA24UL, 0x42752927UL, |
| 187 |
|
0x96BF4DCCUL, 0x64D4CECFUL, 0x77843D3BUL, 0x85EFBE38UL, |
| 188 |
|
0xDBFC821CUL, 0x2997011FUL, 0x3AC7F2EBUL, 0xC8AC71E8UL, |
| 189 |
|
0x1C661503UL, 0xEE0D9600UL, 0xFD5D65F4UL, 0x0F36E6F7UL, |
| 190 |
|
0x61C69362UL, 0x93AD1061UL, 0x80FDE395UL, 0x72966096UL, |
| 191 |
|
0xA65C047DUL, 0x5437877EUL, 0x4767748AUL, 0xB50CF789UL, |
| 192 |
|
0xEB1FCBADUL, 0x197448AEUL, 0x0A24BB5AUL, 0xF84F3859UL, |
| 193 |
|
0x2C855CB2UL, 0xDEEEDFB1UL, 0xCDBE2C45UL, 0x3FD5AF46UL, |
| 194 |
|
0x7198540DUL, 0x83F3D70EUL, 0x90A324FAUL, 0x62C8A7F9UL, |
| 195 |
|
0xB602C312UL, 0x44694011UL, 0x5739B3E5UL, 0xA55230E6UL, |
| 196 |
|
0xFB410CC2UL, 0x092A8FC1UL, 0x1A7A7C35UL, 0xE811FF36UL, |
| 197 |
|
0x3CDB9BDDUL, 0xCEB018DEUL, 0xDDE0EB2AUL, 0x2F8B6829UL, |
| 198 |
|
0x82F63B78UL, 0x709DB87BUL, 0x63CD4B8FUL, 0x91A6C88CUL, |
| 199 |
|
0x456CAC67UL, 0xB7072F64UL, 0xA457DC90UL, 0x563C5F93UL, |
| 200 |
|
0x082F63B7UL, 0xFA44E0B4UL, 0xE9141340UL, 0x1B7F9043UL, |
| 201 |
|
0xCFB5F4A8UL, 0x3DDE77ABUL, 0x2E8E845FUL, 0xDCE5075CUL, |
| 202 |
|
0x92A8FC17UL, 0x60C37F14UL, 0x73938CE0UL, 0x81F80FE3UL, |
| 203 |
|
0x55326B08UL, 0xA759E80BUL, 0xB4091BFFUL, 0x466298FCUL, |
| 204 |
|
0x1871A4D8UL, 0xEA1A27DBUL, 0xF94AD42FUL, 0x0B21572CUL, |
| 205 |
|
0xDFEB33C7UL, 0x2D80B0C4UL, 0x3ED04330UL, 0xCCBBC033UL, |
| 206 |
|
0xA24BB5A6UL, 0x502036A5UL, 0x4370C551UL, 0xB11B4652UL, |
| 207 |
|
0x65D122B9UL, 0x97BAA1BAUL, 0x84EA524EUL, 0x7681D14DUL, |
| 208 |
|
0x2892ED69UL, 0xDAF96E6AUL, 0xC9A99D9EUL, 0x3BC21E9DUL, |
| 209 |
|
0xEF087A76UL, 0x1D63F975UL, 0x0E330A81UL, 0xFC588982UL, |
| 210 |
|
0xB21572C9UL, 0x407EF1CAUL, 0x532E023EUL, 0xA145813DUL, |
| 211 |
|
0x758FE5D6UL, 0x87E466D5UL, 0x94B49521UL, 0x66DF1622UL, |
| 212 |
|
0x38CC2A06UL, 0xCAA7A905UL, 0xD9F75AF1UL, 0x2B9CD9F2UL, |
| 213 |
|
0xFF56BD19UL, 0x0D3D3E1AUL, 0x1E6DCDEEUL, 0xEC064EEDUL, |
| 214 |
|
0xC38D26C4UL, 0x31E6A5C7UL, 0x22B65633UL, 0xD0DDD530UL, |
| 215 |
|
0x0417B1DBUL, 0xF67C32D8UL, 0xE52CC12CUL, 0x1747422FUL, |
| 216 |
|
0x49547E0BUL, 0xBB3FFD08UL, 0xA86F0EFCUL, 0x5A048DFFUL, |
| 217 |
|
0x8ECEE914UL, 0x7CA56A17UL, 0x6FF599E3UL, 0x9D9E1AE0UL, |
| 218 |
|
0xD3D3E1ABUL, 0x21B862A8UL, 0x32E8915CUL, 0xC083125FUL, |
| 219 |
|
0x144976B4UL, 0xE622F5B7UL, 0xF5720643UL, 0x07198540UL, |
| 220 |
|
0x590AB964UL, 0xAB613A67UL, 0xB831C993UL, 0x4A5A4A90UL, |
| 221 |
|
0x9E902E7BUL, 0x6CFBAD78UL, 0x7FAB5E8CUL, 0x8DC0DD8FUL, |
| 222 |
|
0xE330A81AUL, 0x115B2B19UL, 0x020BD8EDUL, 0xF0605BEEUL, |
| 223 |
|
0x24AA3F05UL, 0xD6C1BC06UL, 0xC5914FF2UL, 0x37FACCF1UL, |
| 224 |
|
0x69E9F0D5UL, 0x9B8273D6UL, 0x88D28022UL, 0x7AB90321UL, |
| 225 |
|
0xAE7367CAUL, 0x5C18E4C9UL, 0x4F48173DUL, 0xBD23943EUL, |
| 226 |
|
0xF36E6F75UL, 0x0105EC76UL, 0x12551F82UL, 0xE03E9C81UL, |
| 227 |
|
0x34F4F86AUL, 0xC69F7B69UL, 0xD5CF889DUL, 0x27A40B9EUL, |
| 228 |
|
0x79B737BAUL, 0x8BDCB4B9UL, 0x988C474DUL, 0x6AE7C44EUL, |
| 229 |
|
0xBE2DA0A5UL, 0x4C4623A6UL, 0x5F16D052UL, 0xAD7D5351UL |
| 230 |
|
}; |
| 231 |
|
|
| 232 |
20 |
static uint32_t crc32c(const uint8_t *buf, int len) |
| 233 |
|
{ |
| 234 |
20 |
uint32_t crc = 0xffffffff; |
| 235 |
3120 |
while (len-- > 0) { |
| 236 |
3100 |
crc = (crc >> 8) ^ crctable[(crc ^ (*buf++)) & 0xff]; |
| 237 |
|
} |
| 238 |
20 |
return (crc ^ 0xffffffff); |
| 239 |
|
} |
| 240 |
|
|
| 241 |
|
struct vpx_tlv_iter { |
| 242 |
|
uint8_t t; |
| 243 |
|
void *p; |
| 244 |
|
uint16_t l; |
| 245 |
|
const char *e; |
| 246 |
|
|
| 247 |
|
unsigned char *_p; |
| 248 |
|
uint16_t _l; |
| 249 |
|
}; |
| 250 |
|
|
| 251 |
|
static void |
| 252 |
248 |
vpx_tlv_iter0(struct vpx_tlv_iter *vpi, void *p, unsigned l) |
| 253 |
|
{ |
| 254 |
|
|
| 255 |
248 |
AN(p); |
| 256 |
248 |
assert(l < 65536); |
| 257 |
248 |
memset(vpi, 0, sizeof *vpi); |
| 258 |
248 |
vpi->_p = p; |
| 259 |
248 |
vpi->_l = l; |
| 260 |
248 |
} |
| 261 |
|
|
| 262 |
|
static int |
| 263 |
672 |
vpx_tlv_itern(struct vpx_tlv_iter *vpi) |
| 264 |
|
{ |
| 265 |
672 |
if (vpi->_l == 0 || vpi->e != NULL) |
| 266 |
132 |
return (0); |
| 267 |
540 |
if (vpi->_l < 3) { |
| 268 |
4 |
vpi->e = "Dribble bytes"; |
| 269 |
4 |
return (0); |
| 270 |
|
} |
| 271 |
536 |
vpi->t = *vpi->_p; |
| 272 |
536 |
vpi->l = vbe16dec(vpi->_p + 1); |
| 273 |
536 |
if (vpi->l + 3 > vpi->_l) { |
| 274 |
8 |
vpi->e = "Length Error"; |
| 275 |
8 |
return (0); |
| 276 |
|
} |
| 277 |
528 |
vpi->p = vpi->_p + 3; |
| 278 |
528 |
vpi->_p += 3 + vpi->l; |
| 279 |
528 |
vpi->_l -= 3 + vpi->l; |
| 280 |
528 |
return (1); |
| 281 |
672 |
} |
| 282 |
|
|
| 283 |
|
#define VPX_TLV_FOREACH(ptr, len, itv) \ |
| 284 |
|
for (vpx_tlv_iter0(itv, ptr, len); \ |
| 285 |
|
(vpi->e == NULL) && vpx_tlv_itern(itv);) |
| 286 |
|
|
| 287 |
|
int |
| 288 |
104 |
VPX_tlv(const struct req *req, int typ, const void **dst, int *len) |
| 289 |
|
{ |
| 290 |
|
struct vpx_tlv *tlv; |
| 291 |
|
struct vpx_tlv_iter vpi[1], vpi2[1]; |
| 292 |
|
uintptr_t *up; |
| 293 |
|
|
| 294 |
104 |
CHECK_OBJ_NOTNULL(req, REQ_MAGIC); |
| 295 |
104 |
CHECK_OBJ_NOTNULL(req->sp, SESS_MAGIC); |
| 296 |
104 |
AN(dst); |
| 297 |
104 |
AN(len); |
| 298 |
104 |
*dst = NULL; |
| 299 |
104 |
*len = 0; |
| 300 |
|
|
| 301 |
104 |
if (SES_Get_proxy_tlv(req->sp, &up) != 0 || *up == 0) |
| 302 |
20 |
return (-1); |
| 303 |
84 |
CAST_OBJ_NOTNULL(tlv, (void*)(*up), VPX_TLV_MAGIC); |
| 304 |
|
|
| 305 |
208 |
VPX_TLV_FOREACH(tlv->tlv, tlv->len, vpi) { |
| 306 |
200 |
if (vpi->t == typ) { |
| 307 |
60 |
*dst = vpi->p; |
| 308 |
60 |
*len = vpi->l; |
| 309 |
60 |
return (0); |
| 310 |
|
} |
| 311 |
140 |
if (vpi->t != PP2_TYPE_SSL) |
| 312 |
120 |
continue; |
| 313 |
60 |
VPX_TLV_FOREACH((char*)vpi->p + 5, vpi->l - 5, vpi2) { |
| 314 |
56 |
if (vpi2->t == typ) { |
| 315 |
16 |
*dst = vpi2->p; |
| 316 |
16 |
*len = vpi2->l; |
| 317 |
16 |
return (0); |
| 318 |
|
} |
| 319 |
|
} |
| 320 |
|
} |
| 321 |
8 |
return (-1); |
| 322 |
104 |
} |
| 323 |
|
|
| 324 |
|
static int |
| 325 |
193 |
vpx_proto2(const struct worker *wrk, const struct req *req) |
| 326 |
|
{ |
| 327 |
|
uintptr_t *up; |
| 328 |
|
uint16_t tlv_len; |
| 329 |
|
const uint8_t *p, *ap, *pp; |
| 330 |
|
char *d, *tlv_start; |
| 331 |
193 |
sa_family_t pfam = 0xff; |
| 332 |
193 |
struct suckaddr *sa = NULL; |
| 333 |
|
ssize_t sz; |
| 334 |
|
char ha[VTCP_ADDRBUFSIZE]; |
| 335 |
|
char pa[VTCP_PORTBUFSIZE]; |
| 336 |
|
char hb[VTCP_ADDRBUFSIZE]; |
| 337 |
|
char pb[VTCP_PORTBUFSIZE]; |
| 338 |
|
struct vpx_tlv_iter vpi[1], vpi2[1]; |
| 339 |
|
struct vpx_tlv *tlv; |
| 340 |
|
uint16_t l; |
| 341 |
|
unsigned hdr_len, flen, alen; |
| 342 |
193 |
unsigned const plen = 2, aoff = 16; |
| 343 |
|
|
| 344 |
193 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 345 |
193 |
CHECK_OBJ_NOTNULL(req, REQ_MAGIC); |
| 346 |
193 |
CHECK_OBJ_NOTNULL(req->sp, SESS_MAGIC); |
| 347 |
|
|
| 348 |
193 |
assert(req->htc->rxbuf_e - req->htc->rxbuf_b >= 16L); |
| 349 |
193 |
l = vbe16dec(req->htc->rxbuf_b + 14); |
| 350 |
193 |
assert(l <= VPX_MAX_LEN); // vpx_complete() |
| 351 |
193 |
hdr_len = l + 16L; |
| 352 |
193 |
assert(req->htc->rxbuf_e >= req->htc->rxbuf_b + hdr_len); |
| 353 |
193 |
HTC_RxPipeline(req->htc, req->htc->rxbuf_b + hdr_len); |
| 354 |
193 |
p = (const void *)req->htc->rxbuf_b; |
| 355 |
193 |
d = req->htc->rxbuf_b + 16L; |
| 356 |
|
|
| 357 |
|
/* Version @12 top half */ |
| 358 |
193 |
if ((p[12] >> 4) != 2) { |
| 359 |
0 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
| 360 |
0 |
"PROXY2: bad version (%d)", p[12] >> 4); |
| 361 |
0 |
return (-1); |
| 362 |
|
} |
| 363 |
|
|
| 364 |
|
/* Command @12 bottom half */ |
| 365 |
193 |
switch (p[12] & 0x0f) { |
| 366 |
|
case 0x0: |
| 367 |
37 |
VSL(SLT_Proxy, req->sp->vxid, "2 local local local local"); |
| 368 |
37 |
return (0); |
| 369 |
|
case 0x1: |
| 370 |
|
/* Proxied connection */ |
| 371 |
148 |
break; |
| 372 |
|
default: |
| 373 |
16 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
| 374 |
8 |
"PROXY2: bad command (%d)", p[12] & 0x0f); |
| 375 |
8 |
return (-1); |
| 376 |
|
} |
| 377 |
|
|
| 378 |
|
/* Address family & protocol @13 */ |
| 379 |
148 |
switch (p[13]) { |
| 380 |
|
case 0x00: |
| 381 |
|
/* UNSPEC|UNSPEC, ignore proxy header */ |
| 382 |
12 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
| 383 |
|
"PROXY2: Ignoring UNSPEC|UNSPEC addresses"); |
| 384 |
12 |
return (0); |
| 385 |
|
case 0x11: |
| 386 |
|
/* IPv4|TCP */ |
| 387 |
96 |
pfam = AF_INET; |
| 388 |
96 |
alen = 4; |
| 389 |
96 |
break; |
| 390 |
|
case 0x21: |
| 391 |
|
/* IPv6|TCP */ |
| 392 |
32 |
pfam = AF_INET6; |
| 393 |
32 |
alen = 16; |
| 394 |
32 |
break; |
| 395 |
|
default: |
| 396 |
|
/* Ignore proxy header */ |
| 397 |
16 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
| 398 |
8 |
"PROXY2: Ignoring unsupported protocol (0x%02x)", p[13]); |
| 399 |
8 |
return (0); |
| 400 |
|
} |
| 401 |
|
|
| 402 |
128 |
flen = 2 * alen + 2 * plen; |
| 403 |
|
|
| 404 |
128 |
if (l < flen) { |
| 405 |
32 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
| 406 |
|
"PROXY2: Ignoring short %s addresses (%u)", |
| 407 |
16 |
pfam == AF_INET ? "IPv4" : "IPv6", l); |
| 408 |
16 |
return (0); |
| 409 |
|
} |
| 410 |
|
|
| 411 |
112 |
l -= flen; |
| 412 |
112 |
d += flen; |
| 413 |
|
|
| 414 |
112 |
ap = p + aoff; |
| 415 |
112 |
pp = ap + 2 * alen; |
| 416 |
|
|
| 417 |
|
/* src/client */ |
| 418 |
112 |
if (! SES_Reserve_client_addr(req->sp, &sa, &sz)) |
| 419 |
0 |
return (vpx_ws_err(req)); |
| 420 |
112 |
assert(sz == vsa_suckaddr_len); |
| 421 |
112 |
AN(VSA_BuildFAP(sa, pfam, ap, alen, pp, plen)); |
| 422 |
112 |
VTCP_name(sa, hb, sizeof hb, pb, sizeof pb); |
| 423 |
|
|
| 424 |
112 |
ap += alen; |
| 425 |
112 |
pp += plen; |
| 426 |
|
|
| 427 |
|
/* dst/server */ |
| 428 |
112 |
if (! SES_Reserve_server_addr(req->sp, &sa, &sz)) |
| 429 |
0 |
return (vpx_ws_err(req)); |
| 430 |
112 |
assert(sz == vsa_suckaddr_len); |
| 431 |
112 |
AN(VSA_BuildFAP(sa, pfam, ap, alen, pp, plen)); |
| 432 |
112 |
VTCP_name(sa, ha, sizeof ha, pa, sizeof pa); |
| 433 |
|
|
| 434 |
112 |
if (! SES_Set_String_Attr(req->sp, SA_CLIENT_IP, hb)) |
| 435 |
0 |
return (vpx_ws_err(req)); |
| 436 |
112 |
if (! SES_Set_String_Attr(req->sp, SA_CLIENT_PORT, pb)) |
| 437 |
0 |
return (vpx_ws_err(req)); |
| 438 |
|
|
| 439 |
112 |
VSL(SLT_Proxy, req->sp->vxid, "2 %s %s %s %s", hb, pb, ha, pa); |
| 440 |
|
|
| 441 |
112 |
tlv_start = d; |
| 442 |
112 |
tlv_len = l; |
| 443 |
|
|
| 444 |
268 |
VPX_TLV_FOREACH(d, l, vpi) { |
| 445 |
164 |
if (vpi->t == PP2_TYPE_SSL) { |
| 446 |
36 |
if (vpi->l < 5) { |
| 447 |
4 |
vpi->e = "Length Error"; |
| 448 |
4 |
break; |
| 449 |
|
} |
| 450 |
140 |
VPX_TLV_FOREACH((char*)vpi->p + 5, vpi->l - 5, vpi2) { |
| 451 |
|
} |
| 452 |
32 |
vpi->e = vpi2->e; |
| 453 |
160 |
} else if (vpi->t == PP2_TYPE_CRC32C) { |
| 454 |
20 |
uint32_t n_crc32c = vbe32dec(vpi->p); |
| 455 |
20 |
vbe32enc(vpi->p, 0); |
| 456 |
20 |
if (crc32c(p, hdr_len) != n_crc32c) { |
| 457 |
4 |
VSL(SLT_ProxyGarbage, req->sp->vxid, |
| 458 |
|
"PROXY2: CRC error"); |
| 459 |
4 |
return (-1); |
| 460 |
|
} |
| 461 |
16 |
} |
| 462 |
|
} |
| 463 |
108 |
if (vpi->e != NULL) { |
| 464 |
16 |
VSL(SLT_ProxyGarbage, req->sp->vxid, "PROXY2: TLV %s", vpi->e); |
| 465 |
16 |
return (-1); |
| 466 |
|
} |
| 467 |
92 |
tlv = WS_Alloc(req->sp->ws, sizeof *tlv + tlv_len); |
| 468 |
92 |
if (tlv == NULL) |
| 469 |
8 |
return (vpx_ws_err(req)); |
| 470 |
84 |
INIT_OBJ(tlv, VPX_TLV_MAGIC); |
| 471 |
84 |
tlv->len = tlv_len; |
| 472 |
84 |
memcpy(tlv->tlv, tlv_start, tlv_len); |
| 473 |
84 |
if (! SES_Reserve_proxy_tlv(req->sp, &up, &sz)) |
| 474 |
0 |
return (vpx_ws_err(req)); |
| 475 |
84 |
assert(sz == sizeof up); |
| 476 |
84 |
*up = (uintptr_t)tlv; |
| 477 |
84 |
return (0); |
| 478 |
193 |
} |
| 479 |
|
|
| 480 |
|
/********************************************************************** |
| 481 |
|
* HTC_Rx completion detector |
| 482 |
|
*/ |
| 483 |
|
|
| 484 |
|
static enum htc_status_e v_matchproto_(htc_complete_f) |
| 485 |
692 |
vpx_complete(struct http_conn *htc) |
| 486 |
|
{ |
| 487 |
|
size_t z, l; |
| 488 |
|
uint16_t j; |
| 489 |
|
char *p, *q; |
| 490 |
|
|
| 491 |
692 |
CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC); |
| 492 |
692 |
AN(WS_Reservation(htc->ws)); |
| 493 |
692 |
assert(pdiff(htc->rxbuf_b, htc->rxbuf_e) <= WS_ReservationSize(htc->ws)); |
| 494 |
|
|
| 495 |
692 |
l = htc->rxbuf_e - htc->rxbuf_b; |
| 496 |
692 |
p = htc->rxbuf_b; |
| 497 |
692 |
j = 0x3; |
| 498 |
3828 |
for (z = 0; z < l; z++) { |
| 499 |
3483 |
if (z < sizeof vpx1_sig && p[z] != vpx1_sig[z]) |
| 500 |
1019 |
j &= ~1; |
| 501 |
3483 |
if (z < sizeof vpx2_sig && p[z] != vpx2_sig[z]) |
| 502 |
844 |
j &= ~2; |
| 503 |
3483 |
if (j == 0) |
| 504 |
4 |
return (HTC_S_JUNK); |
| 505 |
3479 |
if (j == 1 && z == sizeof vpx1_sig) { |
| 506 |
140 |
q = memchr(p + z, '\n', htc->rxbuf_e - (p + z)); |
| 507 |
140 |
if (q != NULL && (q - htc->rxbuf_b) > 107) |
| 508 |
4 |
return (HTC_S_OVERFLOW); |
| 509 |
136 |
if (q == NULL) |
| 510 |
4 |
return (HTC_S_MORE); |
| 511 |
132 |
return (HTC_S_COMPLETE); |
| 512 |
|
} |
| 513 |
3339 |
if (j == 2 && z == sizeof vpx2_sig) { |
| 514 |
203 |
if (l < 16) |
| 515 |
0 |
return (HTC_S_MORE); |
| 516 |
203 |
j = vbe16dec(p + 14); |
| 517 |
203 |
if (j > VPX_MAX_LEN) |
| 518 |
8 |
return (HTC_S_OVERFLOW); |
| 519 |
195 |
if (l < 16L + j) |
| 520 |
2 |
return (HTC_S_MORE); |
| 521 |
193 |
return (HTC_S_COMPLETE); |
| 522 |
|
} |
| 523 |
3136 |
} |
| 524 |
345 |
return (HTC_S_MORE); |
| 525 |
692 |
} |
| 526 |
|
|
| 527 |
|
static void v_matchproto_(task_func_t) |
| 528 |
345 |
vpx_new_session(struct worker *wrk, void *arg) |
| 529 |
|
{ |
| 530 |
|
struct req *req; |
| 531 |
|
struct sess *sp; |
| 532 |
|
enum htc_status_e hs; |
| 533 |
|
char *p; |
| 534 |
|
int i; |
| 535 |
|
|
| 536 |
345 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 537 |
345 |
CAST_OBJ_NOTNULL(req, arg, REQ_MAGIC); |
| 538 |
345 |
sp = req->sp; |
| 539 |
345 |
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC); |
| 540 |
|
|
| 541 |
|
/* Per specification */ |
| 542 |
345 |
assert(sizeof vpx1_sig == 5); |
| 543 |
345 |
assert(sizeof vpx2_sig == 12); |
| 544 |
|
|
| 545 |
345 |
HTC_RxInit(req->htc, req->ws); |
| 546 |
690 |
hs = HTC_RxStuff(req->htc, vpx_complete, NULL, NULL, NAN, |
| 547 |
345 |
sp->t_idle + cache_param->timeout_idle, NAN, VPX_MAX_LEN); |
| 548 |
345 |
if (hs != HTC_S_COMPLETE) { |
| 549 |
20 |
Req_Release(req); |
| 550 |
20 |
SES_DeleteHS(sp, hs, NAN); |
| 551 |
20 |
return; |
| 552 |
|
} |
| 553 |
325 |
p = req->htc->rxbuf_b; |
| 554 |
325 |
if (p[0] == vpx1_sig[0]) |
| 555 |
132 |
i = vpx_proto1(wrk, req); |
| 556 |
193 |
else if (p[0] == vpx2_sig[0]) |
| 557 |
193 |
i = vpx_proto2(wrk, req); |
| 558 |
|
else |
| 559 |
0 |
WRONG("proxy sig mismatch"); |
| 560 |
|
|
| 561 |
325 |
if (i) { |
| 562 |
100 |
Req_Release(req); |
| 563 |
100 |
SES_Delete(sp, SC_RX_JUNK, NAN); |
| 564 |
100 |
return; |
| 565 |
|
} |
| 566 |
|
|
| 567 |
225 |
SES_SetTransport(wrk, sp, req, &HTTP1_transport); |
| 568 |
345 |
} |
| 569 |
|
|
| 570 |
|
struct transport PROXY_transport = { |
| 571 |
|
.name = "PROXY", |
| 572 |
|
.proto_ident = "PROXY", |
| 573 |
|
.magic = TRANSPORT_MAGIC, |
| 574 |
|
.new_session = vpx_new_session, |
| 575 |
|
}; |
| 576 |
|
|
| 577 |
|
static void |
| 578 |
96 |
vpx_enc_addr(struct vsb *vsb, int proto, const struct suckaddr *s) |
| 579 |
|
{ |
| 580 |
|
const struct sockaddr_in *sin4; |
| 581 |
|
const struct sockaddr_in6 *sin6; |
| 582 |
|
socklen_t sl; |
| 583 |
|
|
| 584 |
96 |
if (proto == PF_INET6) { |
| 585 |
16 |
sin6 = VSA_Get_Sockaddr(s, &sl); //lint !e826 |
| 586 |
16 |
AN(sin6); |
| 587 |
16 |
assert(sl >= sizeof *sin6); |
| 588 |
16 |
VSB_bcat(vsb, &sin6->sin6_addr, sizeof(sin6->sin6_addr)); |
| 589 |
16 |
} else { |
| 590 |
80 |
sin4 = VSA_Get_Sockaddr(s, &sl); //lint !e826 |
| 591 |
80 |
AN(sin4); |
| 592 |
80 |
assert(sl >= sizeof *sin4); |
| 593 |
80 |
VSB_bcat(vsb, &sin4->sin_addr, sizeof(sin4->sin_addr)); |
| 594 |
|
} |
| 595 |
96 |
} |
| 596 |
|
|
| 597 |
|
static void |
| 598 |
96 |
vpx_enc_port(struct vsb *vsb, const struct suckaddr *s) |
| 599 |
|
{ |
| 600 |
|
uint8_t b[2]; |
| 601 |
|
|
| 602 |
96 |
vbe16enc(b, (uint16_t)VSA_Port(s)); |
| 603 |
96 |
VSB_bcat(vsb, b, sizeof(b)); |
| 604 |
96 |
} |
| 605 |
|
|
| 606 |
|
static void |
| 607 |
48 |
vpx_enc_authority(struct vsb *vsb, const char *authority, size_t l_authority) |
| 608 |
|
{ |
| 609 |
|
uint16_t l; |
| 610 |
|
|
| 611 |
48 |
AN(vsb); |
| 612 |
|
|
| 613 |
48 |
if (l_authority == 0) |
| 614 |
16 |
return; |
| 615 |
32 |
AN(authority); |
| 616 |
32 |
AN(*authority); |
| 617 |
|
|
| 618 |
32 |
VSB_putc(vsb, PP2_TYPE_AUTHORITY); |
| 619 |
32 |
vbe16enc(&l, l_authority); |
| 620 |
32 |
VSB_bcat(vsb, &l, sizeof(l)); |
| 621 |
32 |
VSB_cat(vsb, authority); |
| 622 |
48 |
} |
| 623 |
|
|
| 624 |
|
/* short path for stringified addresses from session attributes */ |
| 625 |
|
static void |
| 626 |
12 |
vpx_format_proxy_v1(struct vsb *vsb, int proto, |
| 627 |
|
const char *cip, const char *cport, |
| 628 |
|
const char *sip, const char *sport) |
| 629 |
|
{ |
| 630 |
12 |
AN(vsb); |
| 631 |
12 |
AN(cip); |
| 632 |
12 |
AN(cport); |
| 633 |
12 |
AN(sip); |
| 634 |
12 |
AN(sport); |
| 635 |
|
|
| 636 |
12 |
VSB_bcat(vsb, vpx1_sig, sizeof(vpx1_sig)); |
| 637 |
|
|
| 638 |
12 |
if (proto == PF_INET6) |
| 639 |
4 |
VSB_cat(vsb, " TCP6 "); |
| 640 |
8 |
else if (proto == PF_INET) |
| 641 |
8 |
VSB_cat(vsb, " TCP4 "); |
| 642 |
|
else |
| 643 |
0 |
WRONG("Wrong proxy v1 proto"); |
| 644 |
|
|
| 645 |
12 |
VSB_printf(vsb, "%s %s %s %s\r\n", cip, sip, cport, sport); |
| 646 |
|
|
| 647 |
12 |
AZ(VSB_finish(vsb)); |
| 648 |
12 |
} |
| 649 |
|
|
| 650 |
|
static void |
| 651 |
48 |
vpx_format_proxy_v2(struct vsb *vsb, int proto, |
| 652 |
|
const struct suckaddr *sac, const struct suckaddr *sas, |
| 653 |
|
const char *authority) |
| 654 |
|
{ |
| 655 |
48 |
size_t l_authority = 0; |
| 656 |
48 |
uint16_t l_tlv = 0, l; |
| 657 |
|
|
| 658 |
48 |
AN(vsb); |
| 659 |
48 |
AN(sac); |
| 660 |
48 |
AN(sas); |
| 661 |
|
|
| 662 |
48 |
if (authority != NULL && *authority != '\0') { |
| 663 |
32 |
l_authority = strlen(authority); |
| 664 |
|
/* 3 bytes in the TLV before the authority string */ |
| 665 |
32 |
assert(3 + l_authority <= UINT16_MAX); |
| 666 |
32 |
l_tlv = 3 + l_authority; |
| 667 |
32 |
} |
| 668 |
|
|
| 669 |
48 |
VSB_bcat(vsb, vpx2_sig, sizeof(vpx2_sig)); |
| 670 |
48 |
VSB_putc(vsb, 0x21); |
| 671 |
48 |
if (proto == PF_INET6) { |
| 672 |
8 |
VSB_putc(vsb, 0x21); |
| 673 |
8 |
vbe16enc(&l, 0x24 + l_tlv); |
| 674 |
8 |
VSB_bcat(vsb, &l, sizeof(l)); |
| 675 |
48 |
} else if (proto == PF_INET) { |
| 676 |
40 |
VSB_putc(vsb, 0x11); |
| 677 |
40 |
vbe16enc(&l, 0x0c + l_tlv); |
| 678 |
40 |
VSB_bcat(vsb, &l, sizeof(l)); |
| 679 |
40 |
} else { |
| 680 |
0 |
WRONG("Wrong proxy v2 proto"); |
| 681 |
|
} |
| 682 |
48 |
vpx_enc_addr(vsb, proto, sac); |
| 683 |
48 |
vpx_enc_addr(vsb, proto, sas); |
| 684 |
48 |
vpx_enc_port(vsb, sac); |
| 685 |
48 |
vpx_enc_port(vsb, sas); |
| 686 |
48 |
vpx_enc_authority(vsb, authority, l_authority); |
| 687 |
48 |
AZ(VSB_finish(vsb)); |
| 688 |
48 |
} |
| 689 |
|
|
| 690 |
|
void |
| 691 |
40 |
VPX_Format_Proxy(struct vsb *vsb, int version, |
| 692 |
|
const struct suckaddr *sac, const struct suckaddr *sas, |
| 693 |
|
const char *authority) |
| 694 |
|
{ |
| 695 |
|
int proto; |
| 696 |
|
char hac[VTCP_ADDRBUFSIZE]; |
| 697 |
|
char pac[VTCP_PORTBUFSIZE]; |
| 698 |
|
char has[VTCP_ADDRBUFSIZE]; |
| 699 |
|
char pas[VTCP_PORTBUFSIZE]; |
| 700 |
|
|
| 701 |
40 |
AN(vsb); |
| 702 |
40 |
AN(sac); |
| 703 |
40 |
AN(sas); |
| 704 |
|
|
| 705 |
40 |
assert(version == 1 || version == 2); |
| 706 |
|
|
| 707 |
40 |
proto = VSA_Get_Proto(sas); |
| 708 |
40 |
assert(proto == VSA_Get_Proto(sac)); |
| 709 |
|
|
| 710 |
40 |
if (version == 1) { |
| 711 |
4 |
VTCP_name(sac, hac, sizeof hac, pac, sizeof pac); |
| 712 |
4 |
VTCP_name(sas, has, sizeof has, pas, sizeof pas); |
| 713 |
4 |
vpx_format_proxy_v1(vsb, proto, hac, pac, has, pas); |
| 714 |
40 |
} else if (version == 2) { |
| 715 |
36 |
vpx_format_proxy_v2(vsb, proto, sac, sas, authority); |
| 716 |
36 |
} else |
| 717 |
0 |
WRONG("Wrong proxy version"); |
| 718 |
40 |
} |
| 719 |
|
|
| 720 |
|
#define PXY_BUFSZ \ |
| 721 |
|
(sizeof(vpx1_sig) + 4 /* TCPx */ + \ |
| 722 |
|
2 * VTCP_ADDRBUFSIZE + 2 * VTCP_PORTBUFSIZE + \ |
| 723 |
|
6 /* spaces, CRLF */ + 16 /* safety */ ) |
| 724 |
|
|
| 725 |
|
int |
| 726 |
20 |
VPX_Send_Proxy(int fd, int version, const struct sess *sp) |
| 727 |
|
{ |
| 728 |
|
struct vsb vsb[1], *vsb2; |
| 729 |
|
struct suckaddr *sac, *sas; |
| 730 |
|
char ha[VTCP_ADDRBUFSIZE]; |
| 731 |
|
char pa[VTCP_PORTBUFSIZE]; |
| 732 |
|
char buf[PXY_BUFSZ]; |
| 733 |
|
int proto, r; |
| 734 |
|
|
| 735 |
20 |
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC); |
| 736 |
20 |
assert(version == 1 || version == 2); |
| 737 |
20 |
AN(VSB_init(vsb, buf, sizeof buf)); |
| 738 |
|
|
| 739 |
20 |
AZ(SES_Get_server_addr(sp, &sas)); |
| 740 |
20 |
AN(sas); |
| 741 |
20 |
proto = VSA_Get_Proto(sas); |
| 742 |
|
|
| 743 |
20 |
if (version == 1) { |
| 744 |
8 |
VTCP_name(sas, ha, sizeof ha, pa, sizeof pa); |
| 745 |
16 |
vpx_format_proxy_v1(vsb, proto, |
| 746 |
8 |
SES_Get_String_Attr(sp, SA_CLIENT_IP), |
| 747 |
8 |
SES_Get_String_Attr(sp, SA_CLIENT_PORT), |
| 748 |
8 |
ha, pa); |
| 749 |
20 |
} else if (version == 2) { |
| 750 |
12 |
AZ(SES_Get_client_addr(sp, &sac)); |
| 751 |
12 |
AN(sac); |
| 752 |
12 |
vpx_format_proxy_v2(vsb, proto, sac, sas, NULL); |
| 753 |
12 |
} else |
| 754 |
0 |
WRONG("Wrong proxy version"); |
| 755 |
|
|
| 756 |
20 |
r = write(fd, VSB_data(vsb), VSB_len(vsb)); |
| 757 |
20 |
VTCP_Assert(r); |
| 758 |
|
|
| 759 |
20 |
if (!DO_DEBUG(DBG_PROTOCOL)) |
| 760 |
20 |
return (r); |
| 761 |
|
|
| 762 |
0 |
vsb2 = VSB_new_auto(); |
| 763 |
0 |
AN(vsb2); |
| 764 |
0 |
VSB_quote(vsb2, VSB_data(vsb), VSB_len(vsb), |
| 765 |
0 |
version == 2 ? VSB_QUOTE_HEX : 0); |
| 766 |
0 |
AZ(VSB_finish(vsb2)); |
| 767 |
0 |
VSL(SLT_Debug, NO_VXID, "PROXY_HDR %s", VSB_data(vsb2)); |
| 768 |
0 |
VSB_destroy(&vsb2); |
| 769 |
0 |
VSB_fini(vsb); |
| 770 |
0 |
return (r); |
| 771 |
20 |
} |
| 772 |
|
|
| 773 |
|
#undef PXY_BUFSZ |