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src/mail/ngx_mail_realip_module.c - nginx source code
Global variables defined
Data types defined
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_mail.h>
- typedef struct {
- ngx_array_t *from;
- } 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,
- NULL,
- NULL,
- ngx_mail_realip_create_srv_conf,
- ngx_mail_realip_merge_srv_conf
- };
- ngx_module_t ngx_mail_realip_module = {
- NGX_MODULE_V1,
- &ngx_mail_realip_module_ctx,
- ngx_mail_realip_commands,
- NGX_MAIL_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- 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:
- 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;
- }
-
- 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;
- }
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