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view src/os/unix/ngx_sunpro_x86.il @ 9153:8f7e6d8c061e
QUIC: use last client dcid to receive initial packets.
Previously, original dcid was used to receive initial client packets in case
server initial response was lost. However, last dcid should be used instead.
These two are the same unless retry is used. In case of retry, client resends
initial packet with a new dcid, that is different from the original dcid. If
server response is lost, the client resends this packet again with the same
dcid. This is shown in RFC 9000, 7.3. Authenticating Connection IDs, Figure 8.
The issue manifested itself with creating multiple server sessions in response
to each post-retry client initial packet, if server response is lost.
| author | Roman Arutyunyan <arut@nginx.com> |
|---|---|
| date | Wed, 30 Aug 2023 11:09:21 +0400 |
| parents | 2cd019520210 |
| children |
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/ / Copyright (C) Igor Sysoev / Copyright (C) Nginx, Inc. / / ngx_atomic_uint_t ngx_atomic_cmp_set(ngx_atomic_t *lock, / ngx_atomic_uint_t old, ngx_atomic_uint_t set); / / the arguments are passed on stack (%esp), 4(%esp), 8(%esp) .inline ngx_atomic_cmp_set,0 movl (%esp), %ecx movl 4(%esp), %eax movl 8(%esp), %edx lock cmpxchgl %edx, (%ecx) setz %al movzbl %al, %eax .end / ngx_atomic_int_t ngx_atomic_fetch_add(ngx_atomic_t *value, / ngx_atomic_int_t add); / / the arguments are passed on stack (%esp), 4(%esp) .inline ngx_atomic_fetch_add,0 movl (%esp), %ecx movl 4(%esp), %eax lock xaddl %eax, (%ecx) .end / ngx_cpu_pause() / / the "rep; nop" is used instead of "pause" to avoid the "[ PAUSE ]" hardware / capability added by linker because Solaris/i386 does not know about it: / / ld.so.1: nginx: fatal: hardware capability unsupported: 0x2000 [ PAUSE ] .inline ngx_cpu_pause,0 rep; nop .end