Re: Message truncation issues on InspIRCd-v3 servers?

[Alcor]

Short addendum (with slightly more information):

This seem to be related to the host/vhost length. A vhost with length of
58 bytes exhibits the issue, whereas a host/vhost with a length of 22
bytes does not.

-A.

Alcor <alcor@tilde.club> writes:

> Hi Erc'ers,
>
> When connecting to irc.rekt.network:6697 using `erc-tls', I've
> encountered some message truncation issues during message sends:
>
> It seems that Erc truncates 28 bytes after the 411th byte sent. I was
> able to verify this using the following test:
>
> 1. Log into irc.rekt.network:6697 with 2 users (this is safe, hosts are
> cloaked by default).
> 2. Start a QUERY session with the other user.
> 3. Execute (kill-new (mapconcat 'number-to-string (number-sequence 0
> 256) " ")) in the minibuffer.
> 4. Yank the number sequence from the kill ring into the query buffer.
>
> The other user will receive: 0 1 2 3 4 5 6 7 8 9 10 11 12 13
> 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
> 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
> 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85
> 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
> 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124
> 125 126 127 128 129 1 <NEWLINE>
> 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
> 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172
> 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190
> 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208
> 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
> 227 228 229 230 231 232 233 234 235 236 237 238 239 <NEWLINE>
> 247 248 249 250 251 252 253 254 255 256
>
> The range 130-136 is missing from the above listing. I suspect this is
> being truncated by Erc, since I've confirmed with other users that other
> clients do not exhibit this issue.
>
> Note that this does not seem to happen on Libera. It may possibly be an ircd
> issue. FWIW, the InspIRCd on irc.rekt.network advertises LINELEN=512 but
> I am unsure whether this is relevant.
>
> Any advice and/or debugging suggestions welcome.
>
> Cheers,
> -A.