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nghttpx: Fix incorrect quic frontend address matching

This commit is contained in:
Tatsuhiro Tsujikawa 2021-09-12 17:48:57 +09:00
parent fc402f5804
commit 00f65afe20
4 changed files with 111 additions and 84 deletions
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51
src/shrpx_worker.cc
View File

@ -1021,7 +1021,10 @@ const UpstreamAddr *Worker::find_quic_upstream_addr(const Address &local_addr) {
assert(0);
}
auto hostport = util::make_hostport(StringRef{host.data()}, port);
std::array<char, util::max_hostport> hostport_buf;
auto hostport = util::make_http_hostport(std::begin(hostport_buf),
StringRef{host.data()}, port);
const UpstreamAddr *fallback_faddr = nullptr;
for (auto &faddr : quic_upstream_addrs_) {
@ -1033,21 +1036,41 @@ const UpstreamAddr *Worker::find_quic_upstream_addr(const Address &local_addr) {
continue;
}
switch (faddr.family) {
case AF_INET:
if (util::starts_with(faddr.hostport, StringRef::from_lit("0.0.0.0:"))) {
fallback_faddr = &faddr;
}
if (faddr.port == 443 || faddr.port == 80) {
switch (faddr.family) {
case AF_INET:
if (util::streq(faddr.hostport, StringRef::from_lit("0.0.0.0"))) {
fallback_faddr = &faddr;
}
break;
case AF_INET6:
if (util::starts_with(faddr.hostport, StringRef::from_lit("[::]:"))) {
fallback_faddr = &faddr;
}
break;
case AF_INET6:
if (util::streq(faddr.hostport, StringRef::from_lit("[::]"))) {
fallback_faddr = &faddr;
}
break;
default:
assert(0);
break;
default:
assert(0);
}
} else {
switch (faddr.family) {
case AF_INET:
if (util::starts_with(faddr.hostport,
StringRef::from_lit("0.0.0.0:"))) {
fallback_faddr = &faddr;
}
break;
case AF_INET6:
if (util::starts_with(faddr.hostport, StringRef::from_lit("[::]:"))) {
fallback_faddr = &faddr;
}
break;
default:
assert(0);
}
}
}

73
src/util.cc
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@ -1325,81 +1325,26 @@ std::string dtos(double n) {
StringRef make_http_hostport(BlockAllocator &balloc, const StringRef &host,
uint16_t port) {
if (port != 80 && port != 443) {
return make_hostport(balloc, host, port);
}
auto ipv6 = ipv6_numeric_addr(host.c_str());
auto iov = make_byte_ref(balloc, host.size() + (ipv6 ? 2 : 0) + 1);
auto p = iov.base;
if (ipv6) {
*p++ = '[';
}
p = std::copy(std::begin(host), std::end(host), p);
if (ipv6) {
*p++ = ']';
}
*p = '\0';
return StringRef{iov.base, p};
auto iov = make_byte_ref(balloc, host.size() + 2 + 1 + 5 + 1);
return make_http_hostport(iov.base, host, port);
}
std::string make_hostport(const StringRef &host, uint16_t port) {
auto ipv6 = ipv6_numeric_addr(host.c_str());
auto serv = utos(port);
std::string hostport;
hostport.resize(host.size() + (ipv6 ? 2 : 0) + 1 + serv.size());
// I'm not sure we can write \0 at the position std::string::size(),
// so allocate an extra byte.
hostport.resize(host.size() + 2 + 1 + 5 + 1);
auto p = &hostport[0];
if (ipv6) {
*p++ = '[';
}
p = std::copy_n(host.c_str(), host.size(), p);
if (ipv6) {
*p++ = ']';
}
*p++ = ':';
std::copy_n(serv.c_str(), serv.size(), p);
auto s = make_hostport(std::begin(hostport), host, port);
hostport.resize(s.size());
return hostport;
}
StringRef make_hostport(BlockAllocator &balloc, const StringRef &host,
uint16_t port) {
auto ipv6 = ipv6_numeric_addr(host.c_str());
auto serv = utos(port);
auto iov =
make_byte_ref(balloc, host.size() + (ipv6 ? 2 : 0) + 1 + serv.size());
auto p = iov.base;
if (ipv6) {
*p++ = '[';
}
p = std::copy(std::begin(host), std::end(host), p);
if (ipv6) {
*p++ = ']';
}
*p++ = ':';
p = std::copy(std::begin(serv), std::end(serv), p);
*p = '\0';
return StringRef{iov.base, p};
auto iov = make_byte_ref(balloc, host.size() + 2 + 1 + 5 + 1);
return make_hostport(iov.base, host, port);
}
namespace {

65
src/util.h
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@ -762,12 +762,6 @@ std::string format_duration(const std::chrono::microseconds &u);
// Just like above, but this takes |t| as seconds.
std::string format_duration(double t);
// Creates "host:port" string using given |host| and |port|. If
// |host| is numeric IPv6 address (e.g., ::1), it is enclosed by "["
// and "]". If |port| is 80 or 443, port part is omitted.
StringRef make_http_hostport(BlockAllocator &balloc, const StringRef &host,
uint16_t port);
// Just like make_http_hostport(), but doesn't treat 80 and 443
// specially.
std::string make_hostport(const StringRef &host, uint16_t port);
@ -775,6 +769,65 @@ std::string make_hostport(const StringRef &host, uint16_t port);
StringRef make_hostport(BlockAllocator &balloc, const StringRef &host,
uint16_t port);
template <typename OutputIt>
StringRef make_hostport(OutputIt first, const StringRef &host, uint16_t port) {
auto ipv6 = ipv6_numeric_addr(host.c_str());
auto serv = utos(port);
auto p = first;
if (ipv6) {
*p++ = '[';
}
p = std::copy(std::begin(host), std::end(host), p);
if (ipv6) {
*p++ = ']';
}
*p++ = ':';
p = std::copy(std::begin(serv), std::end(serv), p);
*p = '\0';
return StringRef{first, p};
}
// Creates "host:port" string using given |host| and |port|. If
// |host| is numeric IPv6 address (e.g., ::1), it is enclosed by "["
// and "]". If |port| is 80 or 443, port part is omitted.
StringRef make_http_hostport(BlockAllocator &balloc, const StringRef &host,
uint16_t port);
constexpr size_t max_hostport = NI_MAXHOST + /* [] for IPv6 */ 2 + /* : */ 1 +
/* port */ 5 + /* terminal NUL */ 1;
template <typename OutputIt>
StringRef make_http_hostport(OutputIt first, const StringRef &host,
uint16_t port) {
if (port != 80 && port != 443) {
return make_hostport(first, host, port);
}
auto ipv6 = ipv6_numeric_addr(host.c_str());
auto p = first;
if (ipv6) {
*p++ = '[';
}
p = std::copy(std::begin(host), std::end(host), p);
if (ipv6) {
*p++ = ']';
}
*p = '\0';
return StringRef{first, p};
}
// Dumps |src| of length |len| in the format similar to `hexdump -C`.
void hexdump(FILE *out, const uint8_t *src, size_t len);

6
src/util_test.cc
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@ -550,6 +550,12 @@ void test_util_make_hostport(void) {
util::make_hostport(balloc, StringRef::from_lit("localhost"), 80));
CU_ASSERT("[::1]:443" ==
util::make_hostport(balloc, StringRef::from_lit("::1"), 443));
// Check std::string version
CU_ASSERT(
"abcdefghijklmnopqrstuvwxyz0123456789:65535" ==
util::make_hostport(
StringRef::from_lit("abcdefghijklmnopqrstuvwxyz0123456789"), 65535));
}
void test_util_strifind(void) {