Mercurial > hg > nginx-quic
view src/mail/ngx_mail_realip_module.c @ 8861:55b38514729b quic
QUIC: fixed insertion at the end of buffer.
Previously, last buffer was tracked by keeping a pointer to the previous
chain link "next" field. When the previous buffer was split and then removed,
the pointer was no longer valid. Writing at this pointer resulted in broken
data chains.
Now last buffer is tracked by keeping a direct pointer to it.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Thu, 17 Feb 2022 22:38:42 +0300 |
parents | ef4bdbbce57e |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_mail.h> typedef struct { ngx_array_t *from; /* array of ngx_cidr_t */ } ngx_mail_realip_srv_conf_t; static ngx_int_t ngx_mail_realip_set_addr(ngx_mail_session_t *s, ngx_addr_t *addr); static char *ngx_mail_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void *ngx_mail_realip_create_srv_conf(ngx_conf_t *cf); static char *ngx_mail_realip_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_command_t ngx_mail_realip_commands[] = { { ngx_string("set_real_ip_from"), NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, ngx_mail_realip_from, NGX_MAIL_SRV_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_mail_module_t ngx_mail_realip_module_ctx = { NULL, /* protocol */ NULL, /* create main configuration */ NULL, /* init main configuration */ ngx_mail_realip_create_srv_conf, /* create server configuration */ ngx_mail_realip_merge_srv_conf /* merge server configuration */ }; ngx_module_t ngx_mail_realip_module = { NGX_MODULE_V1, &ngx_mail_realip_module_ctx, /* module context */ ngx_mail_realip_commands, /* module directives */ NGX_MAIL_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 }; ngx_int_t ngx_mail_realip_handler(ngx_mail_session_t *s) { ngx_addr_t addr; ngx_connection_t *c; ngx_mail_realip_srv_conf_t *rscf; rscf = ngx_mail_get_module_srv_conf(s, ngx_mail_realip_module); if (rscf->from == NULL) { return NGX_OK; } c = s->connection; if (c->proxy_protocol == NULL) { return NGX_OK; } if (ngx_cidr_match(c->sockaddr, rscf->from) != NGX_OK) { return NGX_OK; } if (ngx_parse_addr(c->pool, &addr, c->proxy_protocol->src_addr.data, c->proxy_protocol->src_addr.len) != NGX_OK) { return NGX_OK; } ngx_inet_set_port(addr.sockaddr, c->proxy_protocol->src_port); return ngx_mail_realip_set_addr(s, &addr); } static ngx_int_t ngx_mail_realip_set_addr(ngx_mail_session_t *s, ngx_addr_t *addr) { size_t len; u_char *p; u_char text[NGX_SOCKADDR_STRLEN]; ngx_connection_t *c; c = s->connection; len = ngx_sock_ntop(addr->sockaddr, addr->socklen, text, NGX_SOCKADDR_STRLEN, 0); if (len == 0) { return NGX_ERROR; } p = ngx_pnalloc(c->pool, len); if (p == NULL) { return NGX_ERROR; } ngx_memcpy(p, text, len); c->sockaddr = addr->sockaddr; c->socklen = addr->socklen; c->addr_text.len = len; c->addr_text.data = p; return NGX_OK; } static char * ngx_mail_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_mail_realip_srv_conf_t *rscf = conf; ngx_int_t rc; ngx_str_t *value; ngx_url_t u; ngx_cidr_t c, *cidr; ngx_uint_t i; struct sockaddr_in *sin; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; #endif value = cf->args->elts; if (rscf->from == NULL) { rscf->from = ngx_array_create(cf->pool, 2, sizeof(ngx_cidr_t)); if (rscf->from == NULL) { return NGX_CONF_ERROR; } } #if (NGX_HAVE_UNIX_DOMAIN) if (ngx_strcmp(value[1].data, "unix:") == 0) { cidr = ngx_array_push(rscf->from); if (cidr == NULL) { return NGX_CONF_ERROR; } cidr->family = AF_UNIX; return NGX_CONF_OK; } #endif rc = ngx_ptocidr(&value[1], &c); if (rc != NGX_ERROR) { if (rc == NGX_DONE) { ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "low address bits of %V are meaningless", &value[1]); } cidr = ngx_array_push(rscf->from); if (cidr == NULL) { return NGX_CONF_ERROR; } *cidr = c; return NGX_CONF_OK; } ngx_memzero(&u, sizeof(ngx_url_t)); u.host = value[1]; if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { if (u.err) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s in set_real_ip_from \"%V\"", u.err, &u.host); } return NGX_CONF_ERROR; } cidr = ngx_array_push_n(rscf->from, u.naddrs); if (cidr == NULL) { return NGX_CONF_ERROR; } ngx_memzero(cidr, u.naddrs * sizeof(ngx_cidr_t)); for (i = 0; i < u.naddrs; i++) { cidr[i].family = u.addrs[i].sockaddr->sa_family; switch (cidr[i].family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) u.addrs[i].sockaddr; cidr[i].u.in6.addr = sin6->sin6_addr; ngx_memset(cidr[i].u.in6.mask.s6_addr, 0xff, 16); break; #endif default: /* AF_INET */ sin = (struct sockaddr_in *) u.addrs[i].sockaddr; cidr[i].u.in.addr = sin->sin_addr.s_addr; cidr[i].u.in.mask = 0xffffffff; break; } } return NGX_CONF_OK; } static void * ngx_mail_realip_create_srv_conf(ngx_conf_t *cf) { ngx_mail_realip_srv_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_realip_srv_conf_t)); if (conf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * conf->from = NULL; */ return conf; } static char * ngx_mail_realip_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_mail_realip_srv_conf_t *prev = parent; ngx_mail_realip_srv_conf_t *conf = child; if (conf->from == NULL) { conf->from = prev->from; } return NGX_CONF_OK; }