Add mbedtls_ssl_get_max_frag_len()
This is not very useful for TLS as mbedtls_ssl_write() will automatically
fragment and return the length used, and the application should check for that
anyway, but this is useful for DTLS where mbedtls_ssl_write() returns an
error, and the application needs to be able to query the maximum length
instead of just guessing.
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index bd36e22..77db588 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -1085,6 +1085,8 @@
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3" \
0 \
+ -c "Maximum fragment length is 16384" \
+ -s "Maximum fragment length is 16384" \
-C "client hello, adding max_fragment_length extension" \
-S "found max fragment length extension" \
-S "server hello, max_fragment_length extension" \
@@ -1094,6 +1096,8 @@
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3 max_frag_len=4096" \
0 \
+ -c "Maximum fragment length is 4096" \
+ -s "Maximum fragment length is 4096" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
@@ -1103,6 +1107,8 @@
"$P_SRV debug_level=3 max_frag_len=4096" \
"$P_CLI debug_level=3" \
0 \
+ -c "Maximum fragment length is 16384" \
+ -s "Maximum fragment length is 4096" \
-C "client hello, adding max_fragment_length extension" \
-S "found max fragment length extension" \
-S "server hello, max_fragment_length extension" \
@@ -1113,6 +1119,7 @@
"$G_SRV" \
"$P_CLI debug_level=3 max_frag_len=4096" \
0 \
+ -c "Maximum fragment length is 4096" \
-c "client hello, adding max_fragment_length extension" \
-c "found max_fragment_length extension"
@@ -1120,6 +1127,8 @@
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3 max_frag_len=2048 request_size=2048" \
0 \
+ -c "Maximum fragment length is 2048" \
+ -s "Maximum fragment length is 2048" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
@@ -1131,6 +1140,8 @@
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3 max_frag_len=2048 request_size=2345" \
0 \
+ -c "Maximum fragment length is 2048" \
+ -s "Maximum fragment length is 2048" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
@@ -1143,6 +1154,8 @@
"$P_SRV debug_level=3 dtls=1" \
"$P_CLI debug_level=3 dtls=1 max_frag_len=2048 request_size=2345" \
1 \
+ -c "Maximum fragment length is 2048" \
+ -s "Maximum fragment length is 2048" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \