[Freehoo-devel] file transfers - help needed

[Anand Avati]

hello group,
some guidance please.. regarding file transfers using libyahoo2.. i am
trying to fix the broken file transfer features of freehoo

i call yahoo_send_file() with the correct arguments including a proper
callback function.. the callback gets called with a valid FD to
filetransfer server of yahoo.. and i can write() my file contents into
it also.. but the file does'nt reach the destination buddy..

Am i supposed to do something else which I'm missing?

i compared the tcpdump -X outputs using libyahoo2 client and gaim..
with gaim i get the following..

1. syn/ack handshake with fileserver port 80
2. HTTP POST to /notifyft with cookie
3. YMSG packet mentioning destbuddy/me/message/filename/size
4. contents of the file

with the libyahoo2 client i get

1. syn/ack handshake
2. HTTP POST TO /notifyft with cookie
3. <missing!>
4. contents of the file

i had a look at the source code of 0.7.5 and here's what i figured out..

a. yahoo_send_file() creates the packet needed for step 3 mentioned above.

b. it calls yahoo_http_post with _yahoo_send_file_connected() as callback
function, and a structure having step3's pkt and freehoo
provided callback/data as callback data for _yahoo_send_file_connected.

c. _yahoo_send_file_connected gets called with an fd connected to
fileserver port 80.

d. _yahoo_send_file_connected calls yahoo_send_packet() with step3's pkt as
arg
e. _yahoo_send_file_connected then calls freehoo provided callback
function which writes file contents into the fd (socket to fileserver
port 80)

now the issue is that within step d, yahoo_send_packet() serialises
yahoo_packet into a byte stream, and calls yahoo_add_to_send_queue with
the byte stream as the TX buffer.. which in turn just queue's the buffer
to yid->txqueue and returns ... (note, still not written into socket)

then it calls freehoo provided callback, where i just write() file contents 
into the fd.. (still the step3's  pkt not written).. 

to verify that, i changed in yahoo_send_packet, 
s/yahoo_add_to_send_queue/yahoo_send_data/ and i COULD succesfully TX my file..

now what i feel is i am missing some 'ritual' .. and instead of write()'ing my 
file contents to the newly got FD i should somehow make it get 
yahoo_add_to_send_queue()'d behind step3's pkt .. am i right? i'm not able to 
figure out how to do that.. kindly show me the right way to get going..

thanks and regards,
avati


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