// 对已经整理好的监听端口数组排序
// 调用ngx_create_listening添加到cycle的监听端口数组，只是添加，没有其他动作
// 设置有连接发生时的回调函数ngx_stream_init_connection
static char *
ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports)
{
ngx_uint_t i, p, last, bind_wildcard;
ngx_listening_t *ls;
ngx_stream_port_t *stport;
ngx_stream_conf_port_t *port;
ngx_stream_conf_addr_t *addr;
ngx_stream_core_srv_conf_t *cscf;
// 遍历已经整理好的监听端口数组
// 由ngx_stream_add_ports添加
port = ports->elts;
for (p = 0; p < ports->nelts; p++) {
// port[p].addrs里存储的是监听相同端口的不同server{}的ngx_stream_listen_t
// 根据wildcard、bind对server排序
ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts,
sizeof(ngx_stream_conf_addr_t), ngx_stream_cmp_conf_addrs);
// addrs.elts里存储的是监听端口结构体ngx_stream_listen_t
// addr 数组首地址， last 数组长度
addr = port[p].addrs.elts;
last = port[p].addrs.nelts;
/*
* if there is the binding to the "*:port" then we need to bind()
* to the "*:port" only and ignore the other bindings
*/
if (addr[last - 1].opt.wildcard) {
addr[last - 1].opt.bind = 1;
bind_wildcard = 1;
} else {
bind_wildcard = 0;
}
i = 0;
while (i < last) {
if (bind_wildcard && !addr[i].opt.bind) {
i++;
continue;
}
// 添加到cycle的监听端口数组，只是添加，没有其他动作
// 这里的ls是ngx_listening_t
ls = ngx_create_listening(cf, &addr[i].opt.u.sockaddr,
addr[i].opt.socklen);
if (ls == NULL) {
return NGX_CONF_ERROR;
}
// 设置监听端口的其他参数
ls->addr_ntop = 1;
// 重要！
// 设置有连接发生时的回调函数
ls->handler = ngx_stream_init_connection;
// 设置连接的内存池是256bytes，不可配置
ls->pool_size = 256;
// addr[i].opt就是ngx_stream_listen_t
// 在ngx_stream_add_ports里添加
// addr->opt.ctx就是server的配置数组ngx_stream_conf_ctx_t
// 这里没有使用addr[i].opt.ctx
// 因为addr的前进与i++并不同步
// 获取此server配置数组里的cscf
cscf = addr->opt.ctx->srv_conf[ngx_stream_core_module.ctx_index];
ls->logp = cscf->error_log;
ls->log.data = &ls->addr_text;
ls->log.handler = ngx_accept_log_error;
// 端口的backlog
ls->backlog = addr[i].opt.backlog;
ls->keepalive = addr[i].opt.so_keepalive;
#if (NGX_HAVE_KEEPALIVE_TUNABLE)
ls->keepidle = addr[i].opt.tcp_keepidle;
ls->keepintvl = addr[i].opt.tcp_keepintvl;
ls->keepcnt = addr[i].opt.tcp_keepcnt;
#endif
#if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
ls->ipv6only = addr[i].opt.ipv6only;
#endif
#if (NGX_HAVE_REUSEPORT)
// 新的reuseport设置
ls->reuseport = addr[i].opt.reuseport;
#endif
// 存储本server信息
stport = ngx_palloc(cf->pool, sizeof(ngx_stream_port_t));
if (stport == NULL) {
return NGX_CONF_ERROR;
}
ls->servers = stport;
stport->naddrs = i + 1;
switch (ls->sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
if (ngx_stream_add_addrs6(cf, stport, addr) != NGX_OK) {
return NGX_CONF_ERROR;
}
break;
#endif
default: /* AF_INET */
if (ngx_stream_add_addrs(cf, stport, addr) != NGX_OK) {
return NGX_CONF_ERROR;
}
break;
}
// reuseport专用的函数，1.8.x没有
if (ngx_clone_listening(cf, ls) != NGX_OK) {
return NGX_CONF_ERROR;
}
// 数组指针前进到下一个元素，即下一个server
addr++;
last--;
}
}
return NGX_CONF_OK;
}
static char *
ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports)
{
ngx_uint_t i, p, last, bind_wildcard;
ngx_listening_t *ls;
ngx_stream_port_t *stport;
ngx_stream_conf_port_t *port;
ngx_stream_conf_addr_t *addr;
ngx_stream_core_srv_conf_t *cscf;
port = ports->elts;
for (p = 0; p < ports->nelts; p++) {
ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts,
sizeof(ngx_stream_conf_addr_t), ngx_stream_cmp_conf_addrs);
addr = port[p].addrs.elts;
last = port[p].addrs.nelts;
/*
* if there is the binding to the "*:port" then we need to bind()
* to the "*:port" only and ignore the other bindings
*/
if (addr[last - 1].opt.wildcard) {
addr[last - 1].opt.bind = 1;
bind_wildcard = 1;
} else {
bind_wildcard = 0;
}
i = 0;
while (i < last) {
if (bind_wildcard && !addr[i].opt.bind) {
i++;
continue;
}
ls = ngx_create_listening(cf, &addr[i].opt.sockaddr.sockaddr,
addr[i].opt.socklen);
if (ls == NULL) {
return NGX_CONF_ERROR;
}
ls->addr_ntop = 1;
ls->handler = ngx_stream_init_connection;
ls->pool_size = 256;
ls->type = addr[i].opt.type;
cscf = addr->opt.ctx->srv_conf[ngx_stream_core_module.ctx_index];
ls->logp = cscf->error_log;
ls->log.data = &ls->addr_text;
ls->log.handler = ngx_accept_log_error;
ls->backlog = addr[i].opt.backlog;
ls->wildcard = addr[i].opt.wildcard;
ls->keepalive = addr[i].opt.so_keepalive;
#if (NGX_HAVE_KEEPALIVE_TUNABLE)
ls->keepidle = addr[i].opt.tcp_keepidle;
ls->keepintvl = addr[i].opt.tcp_keepintvl;
ls->keepcnt = addr[i].opt.tcp_keepcnt;
#endif
#if (NGX_HAVE_INET6)
ls->ipv6only = addr[i].opt.ipv6only;
#endif
#if (NGX_HAVE_REUSEPORT)
ls->reuseport = addr[i].opt.reuseport;
#endif
stport = ngx_palloc(cf->pool, sizeof(ngx_stream_port_t));
if (stport == NULL) {
return NGX_CONF_ERROR;
}
ls->servers = stport;
stport->naddrs = i + 1;
switch (ls->sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
if (ngx_stream_add_addrs6(cf, stport, addr) != NGX_OK) {
return NGX_CONF_ERROR;
}
break;
#endif
default: /* AF_INET */
if (ngx_stream_add_addrs(cf, stport, addr) != NGX_OK) {
return NGX_CONF_ERROR;
}
break;
}
if (ngx_clone_listening(cf, ls) != NGX_OK) {
return NGX_CONF_ERROR;
}
addr++;
last--;
}
}
return NGX_CONF_OK;
}
