I try here to present the problem as clear as possible. I make these changes to 5.6, which let me see the input and output of th_mask_encode and th_mask_decode. ```diff diff --git a/src/modules/topoh/th_mask.c b/src/modules/topoh/th_mask.c index 122d0935a5..895864e3c4 100644 --- a/src/modules/topoh/th_mask.c +++ b/src/modules/topoh/th_mask.c @@ -93,6 +93,7 @@ char* th_mask_encode(char *in, int ilen, str *prefix, int *olen) int r; char *p; int block; + LM_ERR("th_mask_encode C in=[%s] ilen=%i prefix=[%.*s]\n", in, ilen, prefix->len, prefix->s); *olen = (((ilen+2)/3)<<2) + ((prefix!=NULL&&prefix->len>0)?prefix->len:0); out = (char*)pkg_malloc((*olen+1)*sizeof(char)); @@ -121,7 +122,7 @@ char* th_mask_encode(char *in, int ilen, str *prefix, int *olen) *(p++) = (left>0)?_th_EB64[(block >> 6) & 0x3f]:_th_PD64[0]; *(p++) = (left>1)?_th_EB64[block & 0x3f]:_th_PD64[0]; } - + LM_ERR("th_mask_encode D in=[%s] ilen=%i prefix=[%.*s] out=[%s], olen=%i\n", in, ilen, prefix->len, prefix->s, out, *olen); return out; } @@ -135,6 +136,7 @@ char* th_mask_decode(char *in, int ilen, str *prefix, int extra, int *olen) int j; int end; char c; + LM_ERR("th_mask_decode A in=[%s] ilen=%i prefix=[%.*s] extra=%i\n", in, ilen, prefix->len, prefix->s, extra); for(n=0,i=ilen-1; in[i]==_th_PD64[0]; i--) n++; @@ -178,7 +180,7 @@ char* th_mask_decode(char *in, int ilen, str *prefix, int extra, int *olen) for(j=0, n=16; j<3 && idx+j< *olen; j++, n-=8) out[idx+j] = (char)((block >> n) & 0xff); } - + LM_ERR("th_mask_decode B in=[%s] ilen=%i prefix=[%.*s] extra=%i out=[%s], olen=%i\n", in, ilen, prefix->len, prefix->s, extra, out, *olen); return out; } ``` I log the traffic using sipdump/KEMI, I believe this is the equivalent of using pcap: ```lua function ksr_sipdump_event(evname) KSR.err("ksr_sipdump_event 1--------- " .. evname .. " src " .. KSR.pv.gete("$sipdump(src_ip)") .. ':' .. KSR.pv.gete("$sipdump(src_port)") .. " dst " .. KSR.pv.gete("$sipdump(dst_ip)") .. ':' .. KSR.pv.gete("$sipdump(dst_port)") .. "\n" .. KSR.pv.gete("$sipdump(buf)") .. "\n") return 1 end ``` The test case is: a websocket client calls Linphone, they talk and finally Linphone hangs up. Traffic without topoh - [without-topoh.txt](https://github.com/kamailio/kamailio/files/10745403/with… Traffic with topoh and the above logging from th_mask_encode/th_mask_decode - [with-topoh.txt](https://github.com/kamailio/kamailio/files/10745414/with-to… As can be seen in the latter file, Linphone receives: ``` INVITE sip:test-gnome-calls@87.118.146.153:33392;transport=tls SIP/2.0 Record-Route: <sip:bFdhl3svenkupAWQTI5OE8SQTI5On94=@144.76.142.78:5061;transport=tls;r2=on;lr;ftag=p702o1dak9;did=99d.b2a2;nat=yes> Record-Route: <sip:127.3.4.84;line=sr-BkHOV3ilcl0v8gmkcFJsLXCCo6YwnboD9b0bwo9imwUAVb7U7WtTm1ygmpyamW.AmQN4LSi0IqmOIgiTDXLQVg.eDFUAVkaeVkcThFBUBWBO83MaclYsVbGK5F7UVbHKu3.ehb.4I3YTDXHHBO**> Via: SIP/2.0/TLS 144.76.142.78:5061;branch=z9hG4bK78b4.77ca12d776048c779e71b6216dd967a0.0 Via: SIP/2.0/UDP 127.3.4.84;branch=z9hG4bKsr-wTH7uQ.A81UXw68NmW0QmWoHI3K6B3GAu3HAL3Yv5F74BqCEBq7UmWdJ8zh4B3ozcFHkcF7U8b7TuzBkuztT8pygVWGwnW6K5Xh4hqi0I3mZDXZJ5tBThKvJ8QtaVbhg Max-Forwards: 69 To: <sip:test-gnome-calls@bapha.be> From: "Online https://sip.bapha.be" <sip:online@bapha.be>;tag=p702o1dak9 Call-ID: b9kkank0a5398g9odcre CSeq: 134 INVITE Contact: <sip:127.3.4.84;line=sr-BkHOV3JKcFosIScv7W7yBQ76cFJjmXisIpJjIqc0IlHKVkYv5FYQDbtTm1ygmpyamW.AmQ02mWdJ8zc2mbGTB3YABgCEBq7ULg84Ik.*> ``` and later sends ``` BYE sip:127.3.4.84;line=sr-BkHOV3JKcFosIScv7W7yBQ76cFJjmXisIpJjIqc0IlHKVkYv5FYQDbtTm1ygmpyamW.AmQ02mWdJ8zc2mbGTB3YABgCEBq7ULg84Ik.* SIP/2.0 ``` topoh_decode is called with ``` 22(23) ERROR: topoh [th_mask.c:183]: th_mask_decode(): th_mask_decode B in=[sr-bkhovq9hbg7gckjeifwghkyvismdh3yo5ltah3w4cg.ulxiavqo65f7rc zi3mftqhkhghbc3hpto8w7gufihmbdgmq7oc3.jh39zmbhevkyv5fyqdbnguztav1yamwha8bwqfz8q8qkofz8* SIP/2.0 Route: <sip:bFdhl3svenkupAWQTI5OE8SQTI5On94=@144.76.142.78;transport=ws;r2=on;lr;ftag=p702o1dak9;did=99d.b2a2;nat=yes> Route: <sip:127.3.4.84;line=sr-BkHOV3ilcl0v8gmkcFJsLXCCo6YwnboD9b0bwo9imwUAVb7U7WtTm1ygmpyamW.AmQNRmbdk8bGTB3YABgCEBq7ULlaQVg.eDFUAVkaeV kcThFBUBWBO83MaclYsVbGK5F7UVbHKu3.ehb.4I3YTDXHHBO**> Via: SIP/2.0/WSS 48s45eni5rkn.invalid;branch=z9hG4bK1491699 Max-Forwards: 70 To: <sip:test-gnome-calls@bapha.be>;tag=ulIz8kV From: "Online https://sip.bapha.be" <sip:online@bapha.be>;tag=p702o1dak9 Call-ID: b9kkank0a5398g9odcre CSeq: 134 ACK Supported: outbound User-Agent: SIP.js/0.7.8 Content-Length: 0 ] ilen=147 prefix=[sr-] extra=0 out=[Of^U<B2>tXOt7gjr%<F5>7cn,&<B3>@bn^Uha1be;gr^K^X<A2>q<B2>uui<F4>*f2f5<F1>'cf7a6fb!^U1D7-<F2>X5076t^U fb)bdc562<B3>n,i<FE>'^A4<B7>.11<B0>.15F115'~3'2}<95>~3], olen=107 ``` and the output is garbage: ``` 22(23) ERROR: kemix [kemix_mod.c:229]: ki_kx_get_ruri_attr(): failed to parse the R-URI 22(23) ERROR: rr [loose.c:1011]: loose_route_mode(): failed to parse Request URI ``` The parameters I passed in the sample program above are not arbitrary invented by me, but were taken from real-life occasions. The file with-topoh.txt contains the input and output of Kamailio, according the sipdump module, and the input and output of the th_mask_decode() and th_mask_encode() functions. -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3358#issuecomment-1431688727 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3358/1431688727(a)github.com&gt;