Mercurial > hg > nginx
view src/stream/ngx_stream_write_filter_module.c @ 8466:4fd709540daf quic
HTTP/3: put ngx_http_v3_parse_varlen_int() return code in variable.
This makes calling this function similar to other parse functions.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Fri, 03 Jul 2020 12:07:43 +0300 |
parents | a7ff19afbb14 |
children | d127837c714f |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { ngx_chain_t *from_upstream; ngx_chain_t *from_downstream; } ngx_stream_write_filter_ctx_t; static ngx_int_t ngx_stream_write_filter(ngx_stream_session_t *s, ngx_chain_t *in, ngx_uint_t from_upstream); static ngx_int_t ngx_stream_write_filter_init(ngx_conf_t *cf); static ngx_stream_module_t ngx_stream_write_filter_module_ctx = { NULL, /* preconfiguration */ ngx_stream_write_filter_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL /* merge server configuration */ }; ngx_module_t ngx_stream_write_filter_module = { NGX_MODULE_V1, &ngx_stream_write_filter_module_ctx, /* module context */ NULL, /* module directives */ NGX_STREAM_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_int_t ngx_stream_write_filter(ngx_stream_session_t *s, ngx_chain_t *in, ngx_uint_t from_upstream) { off_t size; ngx_uint_t last, flush, sync; ngx_chain_t *cl, *ln, **ll, **out, *chain; ngx_connection_t *c; ngx_stream_write_filter_ctx_t *ctx; ctx = ngx_stream_get_module_ctx(s, ngx_stream_write_filter_module); if (ctx == NULL) { ctx = ngx_pcalloc(s->connection->pool, sizeof(ngx_stream_write_filter_ctx_t)); if (ctx == NULL) { return NGX_ERROR; } ngx_stream_set_ctx(s, ctx, ngx_stream_write_filter_module); } if (from_upstream) { c = s->connection; out = &ctx->from_upstream; } else { c = s->upstream->peer.connection; out = &ctx->from_downstream; } if (c->error) { return NGX_ERROR; } size = 0; flush = 0; sync = 0; last = 0; ll = out; /* find the size, the flush point and the last link of the saved chain */ for (cl = *out; cl; cl = cl->next) { ll = &cl->next; ngx_log_debug7(NGX_LOG_DEBUG_EVENT, c->log, 0, "write old buf t:%d f:%d %p, pos %p, size: %z " "file: %O, size: %O", cl->buf->temporary, cl->buf->in_file, cl->buf->start, cl->buf->pos, cl->buf->last - cl->buf->pos, cl->buf->file_pos, cl->buf->file_last - cl->buf->file_pos); if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "zero size buf in writer " "t:%d r:%d f:%d %p %p-%p %p %O-%O", cl->buf->temporary, cl->buf->recycled, cl->buf->in_file, cl->buf->start, cl->buf->pos, cl->buf->last, cl->buf->file, cl->buf->file_pos, cl->buf->file_last); ngx_debug_point(); return NGX_ERROR; } if (ngx_buf_size(cl->buf) < 0) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "negative size buf in writer " "t:%d r:%d f:%d %p %p-%p %p %O-%O", cl->buf->temporary, cl->buf->recycled, cl->buf->in_file, cl->buf->start, cl->buf->pos, cl->buf->last, cl->buf->file, cl->buf->file_pos, cl->buf->file_last); ngx_debug_point(); return NGX_ERROR; } size += ngx_buf_size(cl->buf); if (cl->buf->flush || cl->buf->recycled) { flush = 1; } if (cl->buf->sync) { sync = 1; } if (cl->buf->last_buf) { last = 1; } } /* add the new chain to the existent one */ for (ln = in; ln; ln = ln->next) { cl = ngx_alloc_chain_link(c->pool); if (cl == NULL) { return NGX_ERROR; } cl->buf = ln->buf; *ll = cl; ll = &cl->next; ngx_log_debug7(NGX_LOG_DEBUG_EVENT, c->log, 0, "write new buf t:%d f:%d %p, pos %p, size: %z " "file: %O, size: %O", cl->buf->temporary, cl->buf->in_file, cl->buf->start, cl->buf->pos, cl->buf->last - cl->buf->pos, cl->buf->file_pos, cl->buf->file_last - cl->buf->file_pos); if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "zero size buf in writer " "t:%d r:%d f:%d %p %p-%p %p %O-%O", cl->buf->temporary, cl->buf->recycled, cl->buf->in_file, cl->buf->start, cl->buf->pos, cl->buf->last, cl->buf->file, cl->buf->file_pos, cl->buf->file_last); ngx_debug_point(); return NGX_ERROR; } if (ngx_buf_size(cl->buf) < 0) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "negative size buf in writer " "t:%d r:%d f:%d %p %p-%p %p %O-%O", cl->buf->temporary, cl->buf->recycled, cl->buf->in_file, cl->buf->start, cl->buf->pos, cl->buf->last, cl->buf->file, cl->buf->file_pos, cl->buf->file_last); ngx_debug_point(); return NGX_ERROR; } size += ngx_buf_size(cl->buf); if (cl->buf->flush || cl->buf->recycled) { flush = 1; } if (cl->buf->sync) { sync = 1; } if (cl->buf->last_buf) { last = 1; } } *ll = NULL; ngx_log_debug3(NGX_LOG_DEBUG_STREAM, c->log, 0, "stream write filter: l:%ui f:%ui s:%O", last, flush, size); if (size == 0 && !(c->buffered & NGX_LOWLEVEL_BUFFERED) && !(last && c->need_last_buf)) { if (last || flush || sync) { for (cl = *out; cl; /* void */) { ln = cl; cl = cl->next; ngx_free_chain(c->pool, ln); } *out = NULL; c->buffered &= ~NGX_STREAM_WRITE_BUFFERED; return NGX_OK; } ngx_log_error(NGX_LOG_ALERT, c->log, 0, "the stream output chain is empty"); ngx_debug_point(); return NGX_ERROR; } chain = c->send_chain(c, *out, 0); ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, "stream write filter %p", chain); if (chain == NGX_CHAIN_ERROR) { c->error = 1; return NGX_ERROR; } for (cl = *out; cl && cl != chain; /* void */) { ln = cl; cl = cl->next; ngx_free_chain(c->pool, ln); } *out = chain; if (chain) { if (c->shared) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "shared connection is busy"); return NGX_ERROR; } c->buffered |= NGX_STREAM_WRITE_BUFFERED; return NGX_AGAIN; } c->buffered &= ~NGX_STREAM_WRITE_BUFFERED; if (c->buffered & NGX_LOWLEVEL_BUFFERED) { return NGX_AGAIN; } return NGX_OK; } static ngx_int_t ngx_stream_write_filter_init(ngx_conf_t *cf) { ngx_stream_top_filter = ngx_stream_write_filter; return NGX_OK; }