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-rw-r--r--erts/doc/src/erlang.xml9
-rw-r--r--erts/emulator/beam/packet_parser.c43
-rw-r--r--erts/emulator/drivers/common/inet_drv.c11
-rw-r--r--erts/emulator/test/decode_packet_SUITE.erl60
4 files changed, 107 insertions, 16 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index eac7db5eaa..a603d5c2b8 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -724,9 +724,12 @@ false</pre>
size limit.</p>
</item>
<tag><c>{line_length, integer()}</c></tag>
- <item><p>Applies only to line oriented protocols
- (<c>line</c>, <c>http</c>). Lines longer than this
- will be truncated.</p>
+ <item><p>For packet type <c>line</c>, truncate lines longer
+ than the indicated length.</p>
+ <p>Option <c>line_length</c> also applies to <c>http*</c>
+ packet types as an alias for option <c>packet_size</c> in the
+ case when <c>packet_size</c> itself is not set. This usage is
+ only intended for backward compatibility.</p>
</item>
</taglist>
<pre>
diff --git a/erts/emulator/beam/packet_parser.c b/erts/emulator/beam/packet_parser.c
index a66d60aa22..4d4b6ea196 100644
--- a/erts/emulator/beam/packet_parser.c
+++ b/erts/emulator/beam/packet_parser.c
@@ -301,7 +301,11 @@ int packet_get_length(enum PacketParseType htype,
/* TCP_PB_LINE_LF: [Data ... \n] */
const char* ptr2;
if ((ptr2 = memchr(ptr, '\n', n)) == NULL) {
- if (n >= trunc_len && trunc_len!=0) { /* buffer full */
+ if (n > max_plen && max_plen != 0) { /* packet full */
+ DEBUGF((" => packet full (no NL)=%d\r\n", n));
+ goto error;
+ }
+ else if (n >= trunc_len && trunc_len!=0) { /* buffer full */
DEBUGF((" => line buffer full (no NL)=%d\r\n", n));
return trunc_len;
}
@@ -309,6 +313,10 @@ int packet_get_length(enum PacketParseType htype,
}
else {
int len = (ptr2 - ptr) + 1; /* including newline */
+ if (len > max_plen && max_plen!=0) {
+ DEBUGF((" => packet_size %d exceeded\r\n", max_plen));
+ goto error;
+ }
if (len > trunc_len && trunc_len!=0) {
DEBUGF((" => truncated line=%d\r\n", trunc_len));
return trunc_len;
@@ -397,33 +405,50 @@ int packet_get_length(enum PacketParseType htype,
const char* ptr1 = ptr;
int len = plen;
+ if (!max_plen) {
+ /* This is for backward compatibility with old user of decode_packet
+ * that might use option 'line_length' to limit accepted length of
+ * http lines.
+ */
+ max_plen = trunc_len;
+ }
+
while (1) {
const char* ptr2 = memchr(ptr1, '\n', len);
if (ptr2 == NULL) {
- if (n >= trunc_len && trunc_len!=0) { /* buffer full */
- plen = trunc_len;
- goto done;
+ if (max_plen != 0) {
+ if (n >= max_plen) /* packet full */
+ goto error;
}
goto more;
}
else {
plen = (ptr2 - ptr) + 1;
-
- if (*statep == 0)
+
+ if (*statep == 0) {
+ if (max_plen != 0 && plen > max_plen)
+ goto error;
goto done;
-
+ }
+
if (plen < n) {
if (SP(ptr2+1) && plen>2) {
/* header field value continue on next line */
ptr1 = ptr2+1;
len = n - plen;
}
- else
+ else {
+ if (max_plen != 0 && plen > max_plen)
+ goto error;
goto done;
+ }
}
- else
+ else {
+ if (max_plen != 0 && plen > max_plen)
+ goto error;
goto more;
+ }
}
}
}
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index e0d869f328..45089dcc2f 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -8729,8 +8729,15 @@ static int tcp_remain(tcp_descriptor* desc, int* len)
else if (tlen == 0) { /* need unknown more */
*len = 0;
if (nsz == 0) {
- if (nfill == n)
- goto error;
+ if (nfill == n) {
+ if (desc->inet.psize != 0 && desc->inet.psize > nfill) {
+ if (tcp_expand_buffer(desc, desc->inet.psize) < 0)
+ return -1;
+ return desc->inet.psize;
+ }
+ else
+ goto error;
+ }
DEBUGF((" => restart more=%d\r\n", nfill - n));
return nfill - n;
}
diff --git a/erts/emulator/test/decode_packet_SUITE.erl b/erts/emulator/test/decode_packet_SUITE.erl
index c0499554eb..4acbe8c6e0 100644
--- a/erts/emulator/test/decode_packet_SUITE.erl
+++ b/erts/emulator/test/decode_packet_SUITE.erl
@@ -26,12 +26,14 @@
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2,
- basic/1, packet_size/1, neg/1, http/1, line/1, ssl/1, otp_8536/1]).
+ basic/1, packet_size/1, neg/1, http/1, line/1, ssl/1, otp_8536/1,
+ otp_9389/1, otp_9389_line/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
- [basic, packet_size, neg, http, line, ssl, otp_8536].
+ [basic, packet_size, neg, http, line, ssl, otp_8536,
+ otp_9389, otp_9389_line].
groups() ->
[].
@@ -251,6 +253,28 @@ packet_size(Config) when is_list(Config) ->
?line {error,_} = decode_pkt(4,<<Size:32,Packet/binary>>)
end,
lists:seq(-10,-1)),
+
+ %% Test OTP-9389, long HTTP header lines.
+ Opts = [{packet_size, 128}],
+ Pkt = list_to_binary(["GET / HTTP/1.1\r\nHost: localhost\r\nLink: /",
+ string:chars($Y, 64), "\r\n\r\n"]),
+ <<Pkt1:50/binary, Pkt2/binary>> = Pkt,
+ ?line {ok, {http_request,'GET',{abs_path,"/"},{1,1}}, Rest1} =
+ erlang:decode_packet(http, Pkt1, Opts),
+ ?line {ok, {http_header,_,'Host',_,"localhost"}, Rest2} =
+ erlang:decode_packet(httph, Rest1, Opts),
+ ?line {more, undefined} = erlang:decode_packet(httph, Rest2, Opts),
+ ?line {ok, {http_header,_,"Link",_,_}, _} =
+ erlang:decode_packet(httph, list_to_binary([Rest2, Pkt2]), Opts),
+
+ Pkt3 = list_to_binary(["GET / HTTP/1.1\r\nHost: localhost\r\nLink: /",
+ string:chars($Y, 129), "\r\n\r\n"]),
+ ?line {ok, {http_request,'GET',{abs_path,"/"},{1,1}}, Rest3} =
+ erlang:decode_packet(http, Pkt3, Opts),
+ ?line {ok, {http_header,_,'Host',_,"localhost"}, Rest4} =
+ erlang:decode_packet(httph, Rest3, Opts),
+ ?line {error, invalid} = erlang:decode_packet(httph, Rest4, Opts),
+
ok.
@@ -557,3 +581,35 @@ decode_pkt(Type,Bin,Opts) ->
%%io:format(" -> ~p\n",[Res]),
Res.
+otp_9389(doc) -> ["Verify line_length works correctly for HTTP headers"];
+otp_9389(suite) -> [];
+otp_9389(Config) when is_list(Config) ->
+ Opts = [{packet_size, 16384}, {line_length, 3000}],
+ Pkt = list_to_binary(["GET / HTTP/1.1\r\nHost: localhost\r\nLink: /",
+ string:chars($X, 8192),
+ "\r\nContent-Length: 0\r\n\r\n"]),
+ <<Pkt1:5000/binary, Pkt2/binary>> = Pkt,
+ {ok, {http_request,'GET',{abs_path,"/"},{1,1}}, Rest1} =
+ erlang:decode_packet(http, Pkt1, Opts),
+ {ok, {http_header,_,'Host',_,"localhost"}, Rest2} =
+ erlang:decode_packet(httph, Rest1, Opts),
+ {more, undefined} = erlang:decode_packet(httph, Rest2, Opts),
+ {ok, {http_header,_,"Link",_,Link}, Rest3} =
+ erlang:decode_packet(httph, list_to_binary([Rest2, Pkt2]), Opts),
+ true = (length(Link) > 8000),
+ {ok, {http_header,_,'Content-Length',_,"0"}, <<"\r\n">>} =
+ erlang:decode_packet(httph, Rest3, Opts),
+ ok.
+
+otp_9389_line(doc) -> ["Verify packet_size works correctly for line mode"];
+otp_9389_line(suite) -> [];
+otp_9389_line(Config) when is_list(Config) ->
+ Opts = [{packet_size, 20}],
+ Line1 = <<"0123456789012345678\n">>,
+ Line2 = <<"0123456789\n">>,
+ Line3 = <<"01234567890123456789\n">>,
+ Pkt = list_to_binary([Line1, Line2, Line3]),
+ ?line {ok, Line1, Rest1} = erlang:decode_packet(line, Pkt, Opts),
+ ?line {ok, Line2, Rest2} = erlang:decode_packet(line, Rest1, Opts),
+ ?line {error, invalid} = erlang:decode_packet(line, Rest2, Opts),
+ ok.
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-20 10:59:39 +0000