static void
ngx_mail_smtp_resolve_name_handler(ngx_resolver_ctx_t *ctx)
{
ngx_uint_t i;
ngx_connection_t *c;
ngx_mail_session_t *s;
s = ctx->data;
c = s->connection;
if (ctx->state)
{
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"\"%V\" could not be resolved (%i: %s)",
&ctx->name, ctx->state,
ngx_resolver_strerror(ctx->state));
if (ctx->state == NGX_RESOLVE_NXDOMAIN)
{
s->host = smtp_unavailable;
}
else
{
s->host = smtp_tempunavail;
}
}
else
{
#if (NGX_DEBUG)
{
u_char text[NGX_SOCKADDR_STRLEN];
ngx_str_t addr;
addr.data = text;
for (i = 0; i < ctx->naddrs; i++)
{
addr.len = ngx_sock_ntop(ctx->addrs[i].sockaddr,
ctx->addrs[i].socklen,
text, NGX_SOCKADDR_STRLEN, 0);
ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
"name was resolved to %V", &addr);
}
}
#endif
for (i = 0; i < ctx->naddrs; i++)
{
if (ngx_cmp_sockaddr(ctx->addrs[i].sockaddr, ctx->addrs[i].socklen,
c->sockaddr, c->socklen, 0)
== NGX_OK)
{
goto found;
}
}
s->host = smtp_unavailable;
}
found:
ngx_resolve_name_done(ctx);
ngx_mail_smtp_greeting(s, c);
}
static void
ngx_mail_smtp_resolve_name_handler(ngx_resolver_ctx_t *ctx)
{
in_addr_t addr;
ngx_uint_t i;
ngx_connection_t *c;
struct sockaddr_in *sin;
ngx_mail_session_t *s;
s = ctx->data;
c = s->connection;
if (ctx->state) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"%V could not be resolved (%i: %s)",
&ctx->name, ctx->state,
ngx_resolver_strerror(ctx->state));
if (ctx->state == NGX_RESOLVE_NXDOMAIN) {
s->host = smtp_unavailable;
} else {
s->host = smtp_tempunavail;
}
} else {
/* AF_INET only */
sin = (struct sockaddr_in *) c->sockaddr;
for (i = 0; i < ctx->naddrs; i++) {
addr = ctx->addrs[i];
ngx_log_debug4(NGX_LOG_DEBUG_MAIL, c->log, 0,
"name was resolved to %ud.%ud.%ud.%ud",
(ntohl(addr) >> 24) & 0xff,
(ntohl(addr) >> 16) & 0xff,
(ntohl(addr) >> 8) & 0xff,
ntohl(addr) & 0xff);
if (addr == sin->sin_addr.s_addr) {
goto found;
}
}
s->host = smtp_unavailable;
}
found:
ngx_resolve_name_done(ctx);
ngx_mail_smtp_greeting(s, c);
}
void
ngx_mail_smtp_init_session(ngx_mail_session_t *s, ngx_connection_t *c)
{
struct sockaddr_in *sin;
ngx_resolver_ctx_t *ctx;
ngx_mail_core_srv_conf_t *cscf;
cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
if (cscf->resolver == NULL) {
s->host = smtp_unavailable;
ngx_mail_smtp_greeting(s, c);
return;
}
if (c->sockaddr->sa_family != AF_INET) {
s->host = smtp_tempunavail;
ngx_mail_smtp_greeting(s, c);
return;
}
c->log->action = "in resolving client address";
ctx = ngx_resolve_start(cscf->resolver, NULL);
if (ctx == NULL) {
ngx_mail_close_connection(c);
return;
}
/* AF_INET only */
sin = (struct sockaddr_in *) c->sockaddr;
ctx->addr = sin->sin_addr.s_addr;
ctx->handler = ngx_mail_smtp_resolve_addr_handler;
ctx->data = s;
ctx->timeout = cscf->resolver_timeout;
if (ngx_resolve_addr(ctx) != NGX_OK) {
ngx_mail_close_connection(c);
}
}
void
ngx_mail_smtp_init_session(ngx_mail_session_t *s, ngx_connection_t *c)
{
ngx_resolver_ctx_t *ctx;
ngx_mail_core_srv_conf_t *cscf;
cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
if (cscf->resolver == NULL) {
s->host = smtp_unavailable;
ngx_mail_smtp_greeting(s, c);
return;
}
#if (NGX_HAVE_UNIX_DOMAIN)
if (c->sockaddr->sa_family == AF_UNIX) {
s->host = smtp_tempunavail;
ngx_mail_smtp_greeting(s, c);
return;
}
#endif
c->log->action = "in resolving client address";
ctx = ngx_resolve_start(cscf->resolver, NULL);
if (ctx == NULL) {
ngx_mail_close_connection(c);
return;
}
ctx->addr.sockaddr = c->sockaddr;
ctx->addr.socklen = c->socklen;
ctx->handler = ngx_mail_smtp_resolve_addr_handler;
ctx->data = s;
ctx->timeout = cscf->resolver_timeout;
if (ngx_resolve_addr(ctx) != NGX_OK) {
ngx_mail_close_connection(c);
}
}
static void
ngx_mail_smtp_resolve_addr_handler(ngx_resolver_ctx_t *ctx)
{
ngx_connection_t *c;
ngx_mail_session_t *s;
s = ctx->data;
c = s->connection;
if (ctx->state) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"%V could not be resolved (%i: %s)",
&c->addr_text, ctx->state,
ngx_resolver_strerror(ctx->state));
if (ctx->state == NGX_RESOLVE_NXDOMAIN) {
s->host = smtp_unavailable;
} else {
s->host = smtp_tempunavail;
}
ngx_resolve_addr_done(ctx);
ngx_mail_smtp_greeting(s, s->connection);
return;
}
c->log->action = "in resolving client hostname";
s->host.data = ngx_pstrdup(c->pool, &ctx->name);
if (s->host.data == NULL) {
ngx_resolve_addr_done(ctx);
ngx_mail_close_connection(c);
return;
}
s->host.len = ctx->name.len;
ngx_resolve_addr_done(ctx);
ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
"address resolved: %V", &s->host);
c->read->handler = ngx_mail_smtp_resolve_name;
ngx_post_event(c->read, &ngx_posted_events);
}
static void
ngx_mail_smtp_resolve_addr_handler(ngx_resolver_ctx_t *ctx)
{
ngx_connection_t *c;
ngx_mail_session_t *s;
ngx_mail_core_srv_conf_t *cscf;
s = ctx->data;
c = s->connection;
if (ctx->state) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"%V could not be resolved (%i: %s)",
&c->addr_text, ctx->state,
ngx_resolver_strerror(ctx->state));
if (ctx->state == NGX_RESOLVE_NXDOMAIN) {
s->host = smtp_unavailable;
} else {
s->host = smtp_tempunavail;
}
ngx_resolve_addr_done(ctx);
ngx_mail_smtp_greeting(s, s->connection);
return;
}
c->log->action = "in resolving client hostname";
s->host.data = ngx_pstrdup(c->pool, &ctx->name);
if (s->host.data == NULL) {
ngx_resolve_addr_done(ctx);
ngx_mail_close_connection(c);
return;
}
s->host.len = ctx->name.len;
ngx_resolve_addr_done(ctx);
ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
"address resolved: %V", &s->host);
cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
ctx = ngx_resolve_start(cscf->resolver, NULL);
if (ctx == NULL) {
ngx_mail_close_connection(c);
return;
}
ctx->name = s->host;
ctx->type = NGX_RESOLVE_A;
ctx->handler = ngx_mail_smtp_resolve_name_handler;
ctx->data = s;
ctx->timeout = cscf->resolver_timeout;
if (ngx_resolve_name(ctx) != NGX_OK) {
ngx_mail_close_connection(c);
}
}
