svn commit: trunk/busybox/networking
vda at busybox.net
vda at busybox.net
Fri Aug 17 19:20:08 UTC 2007
Author: vda
Date: 2007-08-17 12:20:07 -0700 (Fri, 17 Aug 2007)
New Revision: 19548
Log:
httpd shrink and logging update, part 5 of 7
text data bss dec hex filename
9836 0 0 9836 266c busybox.t1/networking/httpd.o.orig
9724 0 0 9724 25fc busybox.t2/networking/httpd.o
9657 0 0 9657 25b9 busybox.t3/networking/httpd.o
9342 0 0 9342 247e busybox.t4/networking/httpd.o
9342 0 0 9342 247e busybox.t5/networking/httpd.o
9262 0 0 9262 242e busybox.t6/networking/httpd.o
9283 0 0 9283 2443 busybox.t7/networking/httpd.o
9334 0 0 9334 2476 busybox.t8/networking/httpd.o
Modified:
trunk/busybox/networking/httpd.c
Changeset:
Modified: trunk/busybox/networking/httpd.c
===================================================================
--- trunk/busybox/networking/httpd.c 2007-08-17 19:19:42 UTC (rev 19547)
+++ trunk/busybox/networking/httpd.c 2007-08-17 19:20:07 UTC (rev 19548)
@@ -20,7 +20,7 @@
* httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
*
*
- * When a url contains "cgi-bin" it is assumed to be a cgi script. The
+ * When a url starts by "/cgi-bin/" it is assumed to be a cgi script. The
* server changes directory to the location of the script and executes it
* after setting QUERY_STRING and other environment variables.
*
@@ -89,44 +89,45 @@
* root configuration file. If -c is set and the file is not found, the
* server exits with an error.
*
-*/
+ */
#include "libbb.h"
#if ENABLE_FEATURE_HTTPD_USE_SENDFILE
#include <sys/sendfile.h>
#endif
+//#define DEBUG 1
+#define DEBUG 0
+
/* amount of buffering in a pipe */
#ifndef PIPE_BUF
# define PIPE_BUF 4096
#endif
+#define MAX_MEMORY_BUF 8192 /* IO buffer */
+
+#define HEADER_READ_TIMEOUT 60
+
static const char default_path_httpd_conf[] ALIGN1 = "/etc";
static const char httpd_conf[] ALIGN1 = "httpd.conf";
-#define TIMEOUT 60
+typedef struct has_next_ptr {
+ struct has_next_ptr *next;
+} has_next_ptr;
-// Note: busybox xfuncs are not used because we want the server to keep running
-// if something bad happens due to a malformed user request.
-// As a result, all memory allocations after daemonize
-// are checked rigorously
-
-//#define DEBUG 1
-#define DEBUG 0
-
-#define MAX_MEMORY_BUF 8192 /* IO buffer */
-
+/* Must have "next" as a first member */
typedef struct Htaccess {
- char *after_colon;
struct Htaccess *next;
+ char *after_colon;
char before_colon[1]; /* really bigger, must be last */
} Htaccess;
+/* Must have "next" as a first member */
typedef struct Htaccess_IP {
+ struct Htaccess_IP *next;
unsigned ip;
unsigned mask;
int allow_deny;
- struct Htaccess_IP *next;
} Htaccess_IP;
struct globals {
@@ -199,30 +200,6 @@
ContentLength = -1; \
} while (0)
-static const char request_GET[] ALIGN1 = "GET"; /* size algorithmic optimize */
-
-static const char *const suffixTable[] = {
-/* Warning: shorter equivalent suffix in one line must be first */
- ".htm.html", "text/html",
- ".jpg.jpeg", "image/jpeg",
- ".gif", "image/gif",
- ".png", "image/png",
- ".txt.h.c.cc.cpp", "text/plain",
- ".css", "text/css",
- ".wav", "audio/wav",
- ".avi", "video/x-msvideo",
- ".qt.mov", "video/quicktime",
- ".mpe.mpeg", "video/mpeg",
- ".mid.midi", "audio/midi",
- ".mp3", "audio/mpeg",
-#if 0 /* unpopular */
- ".au", "audio/basic",
- ".pac", "application/x-ns-proxy-autoconfig",
- ".vrml.wrl", "model/vrml",
-#endif
- 0, "application/octet-stream" /* default */
-};
-
typedef enum {
HTTP_OK = 200,
HTTP_MOVED_TEMPORARILY = 302,
@@ -285,11 +262,32 @@
};
-static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
+#define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
+static void free_llist(has_next_ptr **pptr)
+{
+ has_next_ptr *cur = *pptr;
+ while (cur) {
+ has_next_ptr *t = cur;
+ cur = cur->next;
+ free(t);
+ }
+ *pptr = NULL;
+}
-#define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
+#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
+ || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
+ || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
+static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
+{
+ free_llist((has_next_ptr**)pptr);
+}
+#endif
+static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
+{
+ free_llist((has_next_ptr**)pptr);
+}
static int scan_ip(const char **ep, unsigned *ip, unsigned char endc)
{
@@ -365,34 +363,9 @@
return 0;
}
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
- || ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
- || ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
-static void free_config_lines(Htaccess **pprev)
-{
- Htaccess *prev = *pprev;
-
- while (prev) {
- Htaccess *cur = prev;
-
- prev = cur->next;
- free(cur);
- }
- *pprev = NULL;
-}
-#endif
-
-/* flag */
-#define FIRST_PARSE 0
-#define SUBDIR_PARSE 1
-#define SIGNALED_PARSE 2
-#define FIND_FROM_HTTPD_ROOT 3
-/****************************************************************************
+/*
+ * Parse configuration file into in-memory linked list.
*
- > $Function: parse_conf()
- *
- * $Description: parse configuration file into in-memory linked list.
- *
* The first non-white character is examined to determine if the config line
* is one of the following:
* .ext:mime/type # new mime type not compiled into httpd
@@ -404,14 +377,14 @@
* are also discarded. That is, previous settings are retained if flag is
* SUBDIR_PARSE.
*
- * $Parameters:
- * (const char *) path . . null for ip address checks, path for password
- * checks.
- * (int) flag . . . . . . the source of the parse request.
- *
- * $Return: (None)
- *
- ****************************************************************************/
+ * path Path where to look for httpd.conf (without filename).
+ * flag Type of the parse request.
+ */
+/* flag */
+#define FIRST_PARSE 0
+#define SUBDIR_PARSE 1
+#define SIGNALED_PARSE 2
+#define FIND_FROM_HTTPD_ROOT 3
static void parse_conf(const char *path, int flag)
{
FILE *f;
@@ -423,38 +396,28 @@
|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
Htaccess *cur;
#endif
-
const char *cf = configFile;
char buf[160];
char *p0 = NULL;
char *c, *p;
+ Htaccess_IP *pip;
- /* free previous ip setup if present */
- Htaccess_IP *pip = ip_a_d;
-
- while (pip) {
- Htaccess_IP *cur_ipl = pip;
-
- pip = cur_ipl->next;
- free(cur_ipl);
- }
- ip_a_d = NULL;
-
+ /* discard old rules */
+ free_Htaccess_IP_list(&ip_a_d);
flg_deny_all = 0;
-
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH \
|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES \
|| ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
/* retain previous auth and mime config only for subdir parse */
if (flag != SUBDIR_PARSE) {
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
- free_config_lines(&g_auth);
+ free_Htaccess_list(&g_auth);
#endif
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
- free_config_lines(&mime_a);
+ free_Htaccess_list(&mime_a);
#endif
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
- free_config_lines(&script_i);
+ free_Htaccess_list(&script_i);
#endif
}
#endif
@@ -463,7 +426,7 @@
cf = alloca(strlen(path) + sizeof(httpd_conf) + 2);
if (cf == NULL) {
if (flag == FIRST_PARSE)
- bb_error_msg_and_die(bb_msg_memory_exhausted);
+ bb_error_msg_and_die(bb_msg_memory_exhausted);
return;
}
sprintf((char *)cf, "%s/%s", path, httpd_conf);
@@ -486,21 +449,21 @@
/* This could stand some work */
while ((p0 = fgets(buf, sizeof(buf), f)) != NULL) {
c = NULL;
- for (p = p0; *p0 != 0 && *p0 != '#'; p0++) {
+ for (p = p0; *p0 != '\0' && *p0 != '#'; p0++) {
if (!isspace(*p0)) {
*p++ = *p0;
if (*p0 == ':' && c == NULL)
- c = p;
+ c = p;
}
}
- *p = 0;
+ *p = '\0';
/* test for empty or strange line */
- if (c == NULL || *c == 0)
+ if (c == NULL || *c == '\0')
continue;
p0 = buf;
if (*p0 == 'd')
- *p0 = 'D';
+ *p0 = 'D';
if (*c == '*') {
if (*p0 == 'D') {
/* memorize deny all */
@@ -535,7 +498,7 @@
}
pip->allow_deny = *p0;
if (*p0 == 'D') {
- /* Deny:form_IP move top */
+ /* Deny:from_IP move top */
pip->next = ip_a_d;
ip_a_d = pip;
} else {
@@ -555,12 +518,12 @@
}
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
if (*p0 == '/') {
- /* make full path from httpd root / curent_path / config_line_path */
- cf = flag == SUBDIR_PARSE ? path : "";
+ /* make full path from httpd root / current_path / config_line_path */
+ cf = (flag == SUBDIR_PARSE ? path : "");
p0 = malloc(strlen(cf) + (c - buf) + 2 + strlen(c));
if (p0 == NULL)
continue;
- c[-1] = 0;
+ c[-1] = '\0';
sprintf(p0, "/%s%s", cf, buf);
/* another call bb_simplify_path */
@@ -571,9 +534,9 @@
if (*cf == '/') { /* skip duplicate (or initial) slash */
continue;
} else if (*cf == '.') {
- if (cf[1] == '/' || cf[1] == 0) { /* remove extra '.' */
+ if (cf[1] == '/' || cf[1] == '\0') { /* remove extra '.' */
continue;
- } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == 0)) {
+ } else if ((cf[1] == '.') && (cf[2] == '/' || cf[2] == '\0')) {
++cf;
if (p > p0) {
while (*--p != '/') /* omit previous dir */;
@@ -588,7 +551,7 @@
if ((p == p0) || (*p != '/')) { /* not a trailing slash */
++p; /* so keep last character */
}
- *p = 0;
+ *p = '\0';
sprintf(p0, "%s:%s", p0, c);
}
#endif
@@ -658,23 +621,14 @@
}
#if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
-/****************************************************************************
+/*
+ * Given a string, html-encode special characters.
+ * This is used for the -e command line option to provide an easy way
+ * for scripts to encode result data without confusing browsers. The
+ * returned string pointer is memory allocated by malloc().
*
- > $Function: encodeString()
- *
- * $Description: Given a string, html encode special characters.
- * This is used for the -e command line option to provide an easy way
- * for scripts to encode result data without confusing browsers. The
- * returned string pointer is memory allocated by malloc().
- *
- * $Parameters:
- * (const char *) string . . The first string to encode.
- *
- * $Return: (char *) . . . .. . . A pointer to the encoded string.
- *
- * $Errors: Returns a null string ("") if memory is not available.
- *
- ****************************************************************************/
+ * Returns a pointer to the encoded string (malloced).
+ */
static char *encodeString(const char *string)
{
/* take the simple route and encode everything */
@@ -694,25 +648,18 @@
}
#endif /* FEATURE_HTTPD_ENCODE_URL_STR */
-/****************************************************************************
+/*
+ * Given a URL encoded string, convert it to plain ascii.
+ * Since decoding always makes strings smaller, the decode is done in-place.
+ * Thus, callers should strdup() the argument if they do not want the
+ * argument modified. The return is the original pointer, allowing this
+ * function to be easily used as arguments to other functions.
*
- > $Function: decodeString()
+ * string The first string to decode.
+ * option_d 1 if called for httpd -d
*
- * $Description: Given a URL encoded string, convert it to plain ascii.
- * Since decoding always makes strings smaller, the decode is done in-place.
- * Thus, callers should strdup() the argument if they do not want the
- * argument modified. The return is the original pointer, allowing this
- * function to be easily used as arguments to other functions.
- *
- * $Parameters:
- * (char *) string . . . The first string to decode.
- * (int) option_d . . 1 if called for httpd -d
- *
- * $Return: (char *) . . . . A pointer to the decoded string (same as input).
- *
- * $Errors: None
- *
- ****************************************************************************/
+ * Returns a pointer to the decoded string (same as input).
+ */
static char *decodeString(char *orig, int option_d)
{
/* note that decoded string is always shorter than original */
@@ -754,9 +701,9 @@
#if ENABLE_FEATURE_HTTPD_CGI
-/****************************************************************************
+/*
* setenv helpers
- ****************************************************************************/
+ */
static void setenv1(const char *name, const char *value)
{
if (!value)
@@ -773,10 +720,10 @@
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
/*
- * Decode a base 64 data stream as per rfc1521.
+ * Decode a base64 data stream as per rfc1521.
* Note that the rfc states that non base64 chars are to be ignored.
- * Since the decode always results in a shorter size than the input, it is
- * OK to pass the input arg as an output arg.
+ * Since the decode always results in a shorter size than the input,
+ * it is OK to pass the input arg as an output arg.
* Parameter: a pointer to a base64 encoded string.
* Decoded data is stored in-place.
*/
@@ -818,18 +765,9 @@
}
#endif
-
-/****************************************************************************
- *
- > $Function: openServer()
- *
- * $Description: create a listen server socket on the designated port.
- *
- * $Return: (int) . . . A connection socket. -1 for errors.
- *
- * $Errors: None
- *
- ****************************************************************************/
+/*
+ * Create a listen server socket on the designated port.
+ */
#if BB_MMU
static int openServer(void)
{
@@ -853,6 +791,8 @@
*/
static int sendHeaders(HttpResponseNum responseNum)
{
+ static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
+
const char *responseString = "";
const char *infoString = NULL;
const char *mime_type;
@@ -1318,6 +1258,28 @@
static void send_file_and_exit(const char *url) ATTRIBUTE_NORETURN;
static void send_file_and_exit(const char *url)
{
+ static const char *const suffixTable[] = {
+ /* Warning: shorter equivalent suffix in one line must be first */
+ ".htm.html", "text/html",
+ ".jpg.jpeg", "image/jpeg",
+ ".gif", "image/gif",
+ ".png", "image/png",
+ ".txt.h.c.cc.cpp", "text/plain",
+ ".css", "text/css",
+ ".wav", "audio/wav",
+ ".avi", "video/x-msvideo",
+ ".qt.mov", "video/quicktime",
+ ".mpe.mpeg", "video/mpeg",
+ ".mid.midi", "audio/midi",
+ ".mp3", "audio/mpeg",
+#if 0 /* unpopular */
+ ".au", "audio/basic",
+ ".pac", "application/x-ns-proxy-autoconfig",
+ ".vrml.wrl", "model/vrml",
+#endif
+ NULL
+ };
+
char *suffix;
int f;
int fd;
@@ -1330,25 +1292,31 @@
suffix = strrchr(url, '.');
- for (table = suffixTable; *table; table += 2)
- if (suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
- try_suffix += strlen(suffix);
- if (*try_suffix == 0 || *try_suffix == '.')
- break;
+ /* If not found, set default as "application/octet-stream"; */
+ found_mime_type = "application/octet-stream";
+ if (suffix) {
+#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ Htaccess *cur;
+#endif
+ for (table = suffixTable; *table; table += 2) {
+ try_suffix = strstr(table[0], suffix);
+ if (try_suffix) {
+ try_suffix += strlen(suffix);
+ if (*try_suffix == '\0' || *try_suffix == '.') {
+ found_mime_type = table[1];
+ break;
+ }
+ }
}
- /* also, if not found, set default as "application/octet-stream"; */
- found_mime_type = table[1];
#if ENABLE_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
- if (suffix) {
- Htaccess * cur;
for (cur = mime_a; cur; cur = cur->next) {
if (strcmp(cur->before_colon, suffix) == 0) {
found_mime_type = cur->after_colon;
break;
}
}
+#endif
}
-#endif /* FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
if (DEBUG)
bb_error_msg("sending file '%s' content-type: %s",
@@ -1426,27 +1394,21 @@
return !flg_deny_all;
}
-/****************************************************************************
+/*
+ * Check the permission file for access password protected.
*
- > $Function: checkPerm()
+ * If config file isn't present, everything is allowed.
+ * Entries are of the form you can see example from header source
*
- * $Description: Check the permission file for access password protected.
+ * path The file path.
+ * request User information to validate.
*
- * If config file isn't present, everything is allowed.
- * Entries are of the form you can see example from header source
- *
- * $Parameters:
- * (const char *) path . . . . The file path.
- * (const char *) request . . . User information to validate.
- *
- * $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
- *
- ****************************************************************************/
-
+ * Returns 1 if request is OK.
+ */
#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
static int checkPerm(const char *path, const char *request)
{
- Htaccess * cur;
+ Htaccess *cur;
const char *p;
const char *p0;
@@ -1481,7 +1443,7 @@
char *cipher;
char *pp;
- if (strncmp(p, request, u-request) != 0) {
+ if (strncmp(p, request, u - request) != 0) {
/* user uncompared */
continue;
}
@@ -1528,15 +1490,17 @@
static void handle_incoming_and_exit(void) ATTRIBUTE_NORETURN;
static void handle_incoming_and_exit(void)
{
+ static const char request_GET[] ALIGN1 = "GET";
+
char *url;
char *purl;
int count;
- int blank = -1;
+ int http_major_version;
char *test;
struct stat sb;
int ip_allowed;
#if ENABLE_FEATURE_HTTPD_CGI
- const char *prequest = request_GET;
+ const char *prequest;
unsigned long length = 0;
char *cookie = 0;
char *content_type = 0;
@@ -1546,21 +1510,24 @@
int credentials = -1; /* if not required this is Ok */
#endif
+ /* Install timeout handler */
sa.sa_handler = exit_on_signal;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0; /* no SA_RESTART */
sigaction(SIGALRM, &sa, NULL);
+ alarm(HEADER_READ_TIMEOUT);
- alarm(TIMEOUT);
if (!get_line())
_exit(0); /* EOF or error or empty line */
+ /* Determine type of request (GET/POST) */
purl = strpbrk(iobuf, " \t");
if (purl == NULL) {
send_headers_and_exit(HTTP_BAD_REQUEST);
}
*purl = '\0';
#if ENABLE_FEATURE_HTTPD_CGI
+ prequest = request_GET;
if (strcasecmp(iobuf, prequest) != 0) {
prequest = "POST";
if (strcasecmp(iobuf, prequest) != 0) {
@@ -1573,8 +1540,10 @@
}
#endif
*purl = ' ';
- count = sscanf(purl, " %[^ ] HTTP/%d.%*d", iobuf, &blank);
+ /* Copy URL from after "GET "/"POST " to stack-allocated char[] */
+ http_major_version = -1;
+ count = sscanf(purl, " %[^ ] HTTP/%d.%*d", iobuf, &http_major_version);
if (count < 1 || iobuf[0] != '/') {
/* Garbled request/URL */
send_headers_and_exit(HTTP_BAD_REQUEST);
@@ -1584,7 +1553,8 @@
send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
}
strcpy(url, iobuf);
- /* extract url args if present */
+
+ /* Extract url args if present */
test = strchr(url, '?');
g_query = NULL;
if (test) {
@@ -1592,6 +1562,7 @@
g_query = test;
}
+ /* Decode URL escape sequences */
test = decodeString(url, 0);
if (test == NULL)
send_headers_and_exit(HTTP_BAD_REQUEST);
@@ -1600,7 +1571,8 @@
send_headers_and_exit(HTTP_NOT_FOUND);
}
- /* algorithm stolen from libbb bb_simplify_path(),
+ /* Canonicalize path */
+ /* Algorithm stolen from libbb bb_simplify_path(),
* but don't strdup and reducing trailing slash and protect out root */
purl = test = url;
do {
@@ -1631,13 +1603,14 @@
*++purl = '\0'; /* so keep last character */
test = purl; /* end ptr */
- /* If URL is directory, adding '/' */
+ /* If URL is a directory, add '/' */
if (test[-1] != '/') {
if (is_directory(url + 1, 1, &sb)) {
found_moved_temporarily = url;
}
}
+ /* Log it */
if (verbose > 1)
bb_error_msg("url:%s", url);
@@ -1653,15 +1626,17 @@
}
*test = '/';
}
- if (blank >= 0) {
- /* read until blank line for HTTP version specified, else parse immediate */
+ if (http_major_version >= 0) {
+ /* Request was with "... HTTP/n.m", and n >= 0 */
+
+ /* Read until blank line for HTTP version specified, else parse immediate */
while (1) {
- alarm(TIMEOUT);
+ alarm(HEADER_READ_TIMEOUT);
if (!get_line())
break; /* EOF or error or empty line */
-
if (DEBUG)
bb_error_msg("header: '%s'", iobuf);
+
#if ENABLE_FEATURE_HTTPD_CGI
/* try and do our best to parse more lines */
if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
@@ -1707,6 +1682,7 @@
} /* while extra header reading */
}
+ /* We read everything, disable peer timeout */
alarm(0);
if (strcmp(bb_basename(url), httpd_conf) == 0 || ip_allowed == 0) {
@@ -1727,9 +1703,9 @@
test = url + 1; /* skip first '/' */
#if ENABLE_FEATURE_HTTPD_CGI
- if (strncmp(test, "cgi-bin", 7) == 0) {
- if (test[7] == '/' && test[8] == '\0') {
- /* protect listing cgi-bin/ */
+ if (strncmp(test, "cgi-bin/", 8) == 0) {
+ if (test[8] == '\0') {
+ /* protect listing "cgi-bin/" */
send_headers_and_exit(HTTP_FORBIDDEN);
}
send_cgi_and_exit(url, prequest, length, cookie, content_type);
@@ -1768,7 +1744,11 @@
send_cgi_and_exit("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
}
}
-#endif /* FEATURE_HTTPD_CGI */
+#endif
+ /* else {
+ * fall through to send_file, it errors out if open fails
+ * }
+ */
send_file_and_exit(test);
@@ -1813,6 +1793,11 @@
static void mini_httpd(int server) ATTRIBUTE_NORETURN;
static void mini_httpd(int server)
{
+ /* NB: it's best to not use xfuncs in this loop before fork().
+ * Otherwise server may die on transient errors (temporary
+ * out-of-memory condition, etc), which is Bad(tm).
+ * Try to do any dangerous calls after fork.
+ */
while (1) {
int n;
len_and_sockaddr fromAddr;
@@ -1825,25 +1810,23 @@
continue;
/* set the KEEPALIVE option to cull dead connections */
setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
- accepted_socket = n;
- n = get_nport(&fromAddr.sa);
- tcp_port = ntohs(n);
- rmt_ip = 0;
- if (fromAddr.sa.sa_family == AF_INET) {
- rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
- }
- if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
- free(rmt_ip_str);
- rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddr.len);
- }
-
if (fork() == 0) {
/* child */
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
/* Do not reload config on HUP */
signal(SIGHUP, SIG_IGN);
#endif
+ accepted_socket = n;
+ n = get_nport(&fromAddr.sa);
+ tcp_port = ntohs(n);
+ rmt_ip = 0;
+ if (fromAddr.sa.sa_family == AF_INET) {
+ rmt_ip = ntohl(fromAddr.sin.sin_addr.s_addr);
+ }
+ if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
+ rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr.sa, fromAddr.len);
+ }
if (verbose) {
/* this trick makes -v logging much simpler */
applet_name = rmt_ip_str;
@@ -1853,7 +1836,7 @@
handle_incoming_and_exit();
}
/* parent, or fork failed */
- close(accepted_socket);
+ close(n);
} /* while (1) */
/* never reached */
}
@@ -1883,12 +1866,13 @@
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
static void sighup_handler(int sig)
{
- /* set and reset */
struct sigaction sa;
parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
+
+ memset(&sa, 0, sizeof(sa));
sa.sa_handler = sighup_handler;
- sigemptyset(&sa.sa_mask);
+ /*sigemptyset(&sa.sa_mask); - memset should be enough */
sa.sa_flags = SA_RESTART;
sigaction(SIGHUP, &sa, NULL);
}
@@ -1930,12 +1914,13 @@
USE_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
+ INIT_G();
+
#if ENABLE_LOCALE_SUPPORT
/* Undo busybox.c: we want to speak English in http (dates etc) */
setlocale(LC_TIME, "C");
#endif
- INIT_G();
home_httpd = xrealloc_getcwd_or_warn(NULL);
opt_complementary = "vv"; /* counter */
/* We do not "absolutize" path given by -h (home) opt.
@@ -2012,13 +1997,12 @@
}
#endif
+#if BB_MMU
#if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
sighup_handler(0);
#else
parse_conf(default_path_httpd_conf, FIRST_PARSE);
#endif
-
-#if BB_MMU
if (opt & OPT_INETD)
mini_httpd_inetd();
if (!(opt & OPT_FOREGROUND))
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