resolv: fixed styles according to review suggestions.

patches/nginx-1.13.6-resolver_conf_parsing.patch

@@ -1,5 +1,5 @@
 diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
-index cd55520c..e61a6d53 100644
+index cd55520c..6a3f98bb 100644
 --- a/src/core/ngx_resolver.c
 +++ b/src/core/ngx_resolver.c
 @@ -5,6 +5,7 @@
@@ -10,17 +10,22 @@ index cd55520c..e61a6d53 100644
  #include <ngx_config.h>
  #include <ngx_core.h>
  #include <ngx_event.h>
-@@ -15,6 +16,9 @@
+@@ -15,6 +16,14 @@
  #define NGX_RESOLVER_TCP_RSIZE  (2 + 65535)
  #define NGX_RESOLVER_TCP_WSIZE  8192
  
++/*
++ * note that 2KB should be more than enough for majority of the
++ * resolv.conf files out there. it also acts as a safety guard to prevent
++ * abuse.
++ */
 +#define NGX_RESOLVER_FILE_BUF_SIZE  2048
 +#define NGX_RESOLVER_FILE_NAME      "/etc/resolv.conf"
 +
  
  typedef struct {
      u_char  ident_hi;
-@@ -131,6 +135,144 @@ static ngx_resolver_node_t *ngx_resolver_lookup_addr6(ngx_resolver_t *r,
+@@ -131,6 +140,138 @@ static ngx_resolver_node_t *ngx_resolver_lookup_addr6(ngx_resolver_t *r,
  #endif
  
  
@@ -60,8 +65,6 @@ index cd55520c..e61a6d53 100644
 +    ngx_memzero(&file, sizeof(ngx_file_t));
 +
 +    file.fd = fd;
-+    file.name.data = path;
-+    file.name.len = ngx_strlen(path) - 1;
 +    file.log = cf->log;
 +
 +    state = sw_nameserver;
@@ -81,7 +84,7 @@ index cd55520c..e61a6d53 100644
 +        return NGX_OK;
 +    }
 +
-+    for (i = 0; i < n; total < MAXNS) {
++    for (i = 0; i < n && total < MAXNS; /* void */) {
 +        if (buf[i] == '#' || buf[i] == ';') {
 +            state = sw_skip;
 +        }
@@ -95,8 +98,8 @@ index cd55520c..e61a6d53 100644
 +                              sizeof("nameserver ") - 1) == 0)
 +            {
 +                state = sw_address;
-+                address = 0;
 +                i += sizeof("nameserver ") - 1;
++                address = i;
 +
 +                continue;
 +            }
@@ -105,10 +108,6 @@ index cd55520c..e61a6d53 100644
 +
 +        case sw_address:
 +
-+            if (address == 0) {
-+                address = i;
-+            }
-+
 +            if (buf[i] == CR || buf[i] == LF || i == n - 1) {
 +                ngx_memzero(&u, sizeof(ngx_url_t));
 +
@@ -165,7 +164,7 @@ index cd55520c..e61a6d53 100644
  ngx_resolver_t *
  ngx_resolver_create(ngx_conf_t *cf, ngx_str_t *names, ngx_uint_t n)
  {
-@@ -246,6 +388,33 @@ ngx_resolver_create(ngx_conf_t *cf, ngx_str_t *names, ngx_uint_t n)
+@@ -246,6 +387,33 @@ ngx_resolver_create(ngx_conf_t *cf, ngx_str_t *names, ngx_uint_t n)
          }
  #endif
  
@@ -173,7 +172,7 @@ index cd55520c..e61a6d53 100644
 +
 +            if (ngx_strcmp(&names[i].data[6], "on") == 0) {
 +                if (ngx_resolver_read_resolv_conf(cf, r,
-+                                                  NGX_RESOLVER_FILE_NAME)
++                                                  (u_char *) NGX_RESOLVER_FILE_NAME)
 +                    != NGX_OK)
 +                {
 +                    ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,