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Moved string functions to src/string.c

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This commit is contained in:
Sergey Lyubka committed 2013-09-30 13:09:16 +01:00
1 parent ef28c37529
commit 1f471e1cf3
4 files changed
+540 -547
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build/Makefile
+3 -3
View File
@@ -24,7 +24,7 @@ EXE_SUFFIX =
CFLAGS = -std=c99 -O2 -W -Wall -pedantic -pthread -pipe -I.. $(CFLAGS_EXTRA)
VERSION = $(shell perl -lne \
'print $$1 if /define\s+MONGOOSE_VERSION\s+"(\S+)"/' ../mongoose.c)
SOURCES = src/mongoose.c
SOURCES = src/internal.h src/string.c src/mongoose.c
TINY_SOURCES = ../mongoose.c main.c
LUA_SOURCES = $(TINY_SOURCES) sqlite3.c lsqlite3.c lua_5.2.1.c
@@ -57,8 +57,8 @@ endif
all:
@echo "make (unix|windows|macos)"
../mongoose.c: mod_lua.c ../mongoose.h Makefile src/internal.h $(SOURCES)
cat src/internal.h src/mongoose.c | sed '/#include "internal.h"/d' > $@
../mongoose.c: mod_lua.c ../mongoose.h Makefile $(SOURCES)
cat $(SOURCES) | sed '/#include "internal.h"/d' > $@
unix_unit_test: $(LUA_SOURCES) Makefile ../test/unit_test.c
$(CC) ../test/unit_test.c lua_5.2.1.c $(CFLAGS) -g -O0 -o t && ./t
build/src/mongoose.c
+24 -272
View File
@@ -159,254 +159,6 @@ const char *mg_version(void) {
return MONGOOSE_VERSION;
}
static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
for (; *src != '\0' && n > 1; n--) {
*dst++ = *src++;
}
*dst = '\0';
}
static int lowercase(const char *s) {
return tolower(* (const unsigned char *) s);
}
static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
int diff = 0;
if (len > 0)
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0' && --len > 0);
return diff;
}
static int mg_strcasecmp(const char *s1, const char *s2) {
int diff;
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0');
return diff;
}
static char * mg_strndup(const char *ptr, size_t len) {
char *p;
if ((p = (char *) malloc(len + 1)) != NULL) {
mg_strlcpy(p, ptr, len + 1);
}
return p;
}
static char * mg_strdup(const char *str) {
return mg_strndup(str, strlen(str));
}
static const char *mg_strcasestr(const char *big_str, const char *small_str) {
int i, big_len = strlen(big_str), small_len = strlen(small_str);
for (i = 0; i <= big_len - small_len; i++) {
if (mg_strncasecmp(big_str + i, small_str, small_len) == 0) {
return big_str + i;
}
}
return NULL;
}
// Like snprintf(), but never returns negative value, or a value
// that is larger than a supplied buffer.
// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
// in his audit report.
static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
const char *fmt, va_list ap) {
int n;
if (buflen == 0)
return 0;
n = vsnprintf(buf, buflen, fmt, ap);
if (n < 0) {
cry(conn, "vsnprintf error");
n = 0;
} else if (n >= (int) buflen) {
cry(conn, "truncating vsnprintf buffer: [%.*s]",
n > 200 ? 200 : n, buf);
n = (int) buflen - 1;
}
buf[n] = '\0';
return n;
}
static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
PRINTF_FORMAT_STRING(const char *fmt), ...)
PRINTF_ARGS(4, 5);
static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
const char *fmt, ...) {
va_list ap;
int n;
va_start(ap, fmt);
n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
va_end(ap);
return n;
}
// Skip the characters until one of the delimiters characters found.
// 0-terminate resulting word. Skip the delimiter and following whitespaces.
// Advance pointer to buffer to the next word. Return found 0-terminated word.
// Delimiters can be quoted with quotechar.
static char *skip_quoted(char **buf, const char *delimiters,
const char *whitespace, char quotechar) {
char *p, *begin_word, *end_word, *end_whitespace;
begin_word = *buf;
end_word = begin_word + strcspn(begin_word, delimiters);
// Check for quotechar
if (end_word > begin_word) {
p = end_word - 1;
while (*p == quotechar) {
// If there is anything beyond end_word, copy it
if (*end_word == '\0') {
*p = '\0';
break;
} else {
size_t end_off = strcspn(end_word + 1, delimiters);
memmove (p, end_word, end_off + 1);
p += end_off; // p must correspond to end_word - 1
end_word += end_off + 1;
}
}
for (p++; p < end_word; p++) {
*p = '\0';
}
}
if (*end_word == '\0') {
*buf = end_word;
} else {
end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
for (p = end_word; p < end_whitespace; p++) {
*p = '\0';
}
*buf = end_whitespace;
}
return begin_word;
}
// Simplified version of skip_quoted without quote char
// and whitespace == delimiters
static char *skip(char **buf, const char *delimiters) {
return skip_quoted(buf, delimiters, delimiters, 0);
}
// Return HTTP header value, or NULL if not found.
static const char *get_header(const struct mg_request_info *ri,
const char *name) {
int i;
for (i = 0; i < ri->num_headers; i++)
if (!mg_strcasecmp(name, ri->http_headers[i].name))
return ri->http_headers[i].value;
return NULL;
}
const char *mg_get_header(const struct mg_connection *conn, const char *name) {
return get_header(&conn->request_info, name);
}
// A helper function for traversing a comma separated list of values.
// It returns a list pointer shifted to the next value, or NULL if the end
// of the list found.
// Value is stored in val vector. If value has form "x=y", then eq_val
// vector is initialized to point to the "y" part, and val vector length
// is adjusted to point only to "x".
static const char *next_option(const char *list, struct vec *val,
struct vec *eq_val) {
if (list == NULL || *list == '\0') {
// End of the list
list = NULL;
} else {
val->ptr = list;
if ((list = strchr(val->ptr, ',')) != NULL) {
// Comma found. Store length and shift the list ptr
val->len = list - val->ptr;
list++;
} else {
// This value is the last one
list = val->ptr + strlen(val->ptr);
val->len = list - val->ptr;
}
if (eq_val != NULL) {
// Value has form "x=y", adjust pointers and lengths
// so that val points to "x", and eq_val points to "y".
eq_val->len = 0;
eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
if (eq_val->ptr != NULL) {
eq_val->ptr++; // Skip over '=' character
eq_val->len = val->ptr + val->len - eq_val->ptr;
val->len = (eq_val->ptr - val->ptr) - 1;
}
}
}
return list;
}
// Perform case-insensitive match of string against pattern
static int match_prefix(const char *pattern, int pattern_len, const char *str) {
const char *or_str;
int i, j, len, res;
if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
res = match_prefix(pattern, or_str - pattern, str);
return res > 0 ? res :
match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
}
i = j = 0;
res = -1;
for (; i < pattern_len; i++, j++) {
if (pattern[i] == '?' && str[j] != '\0') {
continue;
} else if (pattern[i] == '$') {
return str[j] == '\0' ? j : -1;
} else if (pattern[i] == '*') {
i++;
if (pattern[i] == '*') {
i++;
len = (int) strlen(str + j);
} else {
len = (int) strcspn(str + j, "/");
}
if (i == pattern_len) {
return j + len;
}
do {
res = match_prefix(pattern + i, pattern_len - i, str + j + len);
} while (res == -1 && len-- > 0);
return res == -1 ? -1 : j + res + len;
} else if (lowercase(&pattern[i]) != lowercase(&str[j])) {
return -1;
}
}
return j;
}
// HTTP 1.1 assumes keep alive if "Connection:" header is not set
// This function must tolerate situations when connection info is not
// set up, for example if request parsing failed.
@@ -443,11 +195,11 @@ static void send_http_error(struct mg_connection *conn, int status,
// Errors 1xx, 204 and 304 MUST NOT send a body
if (status > 199 && status != 204 && status != 304) {
len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
len = mg_snprintf(buf, sizeof(buf), "Error %d: %s", status, reason);
buf[len++] = '\n';
va_start(ap, fmt);
len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
len += mg_vsnprintf(buf + len, sizeof(buf) - len, fmt, ap);
va_end(ap);
}
DEBUG_TRACE(("[%s]", buf));
@@ -834,7 +586,7 @@ static pid_t spawn_process(struct mg_connection *conn, const char *prog,
}
GetFullPathNameA(dir, sizeof(full_dir), full_dir, NULL);
mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s\"%s\\%s\"",
mg_snprintf(cmdline, sizeof(cmdline), "%s%s\"%s\\%s\"",
interp, interp[0] == '\0' ? "" : " ", full_dir, prog);
DEBUG_TRACE(("Running [%s]", cmdline));
@@ -1311,12 +1063,12 @@ static int convert_uri_to_file_name(struct mg_connection *conn, char *buf,
// Using buf_len - 1 because memmove() for PATH_INFO may shift part
// of the path one byte on the right.
// If document_root is NULL, leave the file empty.
mg_snprintf(conn, buf, buf_len - 1, "%s%s", root, uri);
mg_snprintf(buf, buf_len - 1, "%s%s", root, uri);
rewrite = conn->ctx->config[REWRITE];
while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
mg_snprintf(conn, buf, buf_len - 1, "%.*s%s", (int) b.len, b.ptr,
mg_snprintf(buf, buf_len - 1, "%.*s%s", (int) b.len, b.ptr,
uri + match_len);
break;
}
@@ -1827,7 +1579,7 @@ static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
// Important: using local struct file to test path for is_directory flag.
// If filep is used, mg_stat() makes it appear as if auth file was opened.
} else if (mg_stat(path, &file) && file.is_directory) {
mg_snprintf(conn, name, sizeof(name), "%s%c%s",
mg_snprintf(name, sizeof(name), "%s%c%s",
path, '/', PASSWORDS_FILE_NAME);
fp = mg_fopen(name, "r");
} else {
@@ -1835,7 +1587,7 @@ static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
for (p = path, e = p + strlen(p) - 1; e > p; e--)
if (e[0] == '/')
break;
mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
mg_snprintf(name, sizeof(name), "%.*s%c%s",
(int) (e - p), p, '/', PASSWORDS_FILE_NAME);
fp = mg_fopen(name, "r");
}
@@ -1947,7 +1699,7 @@ static int check_authorization(struct mg_connection *conn, const char *path) {
list = conn->ctx->config[PROTECT_URI];
while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
mg_snprintf(conn, fname, sizeof(fname), "%.*s",
mg_snprintf(fname, sizeof(fname), "%.*s",
(int) filename_vec.len, filename_vec.ptr);
if ((fp = mg_fopen(fname, "r")) == NULL) {
cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
@@ -2112,20 +1864,20 @@ static void print_dir_entry(const struct de *de) {
const char *slash = de->file.is_directory ? "/" : "";
if (de->file.is_directory) {
mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
mg_snprintf(size, sizeof(size), "%s", "[DIRECTORY]");
} else {
// We use (signed) cast below because MSVC 6 compiler cannot
// convert unsigned __int64 to double. Sigh.
if (de->file.size < 1024) {
mg_snprintf(de->conn, size, sizeof(size), "%d", (int) de->file.size);
mg_snprintf(size, sizeof(size), "%d", (int) de->file.size);
} else if (de->file.size < 0x100000) {
mg_snprintf(de->conn, size, sizeof(size),
mg_snprintf(size, sizeof(size),
"%.1fk", (double) de->file.size / 1024.0);
} else if (de->file.size < 0x40000000) {
mg_snprintf(de->conn, size, sizeof(size),
mg_snprintf(size, sizeof(size),
"%.1fM", (double) de->file.size / 1048576);
} else {
mg_snprintf(de->conn, size, sizeof(size),
mg_snprintf(size, sizeof(size),
"%.1fG", (double) de->file.size / 1073741824);
}
}
@@ -2195,7 +1947,7 @@ static int scan_directory(struct mg_connection *conn, const char *dir,
continue;
}
mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
// If we don't memset stat structure to zero, mtime will have
// garbage and strftime() will segfault later on in
@@ -2231,7 +1983,7 @@ static int remove_directory(struct mg_connection *conn, const char *dir) {
continue;
}
mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
// If we don't memset stat structure to zero, mtime will have
// garbage and strftime() will segfault later on in
@@ -2447,7 +2199,7 @@ static void handle_file_request(struct mg_connection *conn, const char *path,
}
conn->status_code = 206;
cl = n == 2 ? (r2 > cl ? cl : r2) - r1 + 1: cl - r1;
mg_snprintf(conn, range, sizeof(range),
mg_snprintf(range, sizeof(range),
"Content-Range: bytes "
"%" INT64_FMT "-%"
INT64_FMT "/%" INT64_FMT "\r\n",
@@ -2724,7 +2476,7 @@ static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
// Copy VARIABLE=VALUE\0 string into the free space
va_start(ap, fmt);
n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
n = mg_vsnprintf(added, (size_t) space, fmt, ap);
va_end(ap);
// Make sure we do not overflow buffer and the envp array
@@ -2877,7 +2629,7 @@ static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
// CGI must be executed in its own directory. 'dir' must point to the
// directory containing executable program, 'p' must point to the
// executable program name relative to 'dir'.
(void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
(void) mg_snprintf(dir, sizeof(dir), "%s", prog);
if ((p = strrchr(dir, '/')) != NULL) {
*p++ = '\0';
} else {
@@ -3130,20 +2882,20 @@ static void do_ssi_include(struct mg_connection *conn, const char *ssi,
// of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
// File name is relative to the webserver root
(void) mg_snprintf(conn, path, sizeof(path), "%s%c%s",
(void) mg_snprintf(path, sizeof(path), "%s%c%s",
conn->ctx->config[DOCUMENT_ROOT], '/', file_name);
} else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) {
// File name is relative to the webserver working directory
// or it is absolute system path
(void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
(void) mg_snprintf(path, sizeof(path), "%s", file_name);
} else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 ||
sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
// File name is relative to the currect document
(void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
(void) mg_snprintf(path, sizeof(path), "%s", ssi);
if ((p = strrchr(path, '/')) != NULL) {
p[1] = '\0';
}
(void) mg_snprintf(conn, path + strlen(path),
(void) mg_snprintf(path + strlen(path),
sizeof(path) - strlen(path), "%s", file_name);
} else {
cry(conn, "Bad SSI #include: [%s]", tag);
@@ -3301,7 +3053,7 @@ static void print_dav_dir_entry(struct de *de, void *data) {
char href[PATH_MAX];
char href_encoded[PATH_MAX];
struct mg_connection *conn = (struct mg_connection *) data;
mg_snprintf(conn, href, sizeof(href), "%s%s",
mg_snprintf(href, sizeof(href), "%s%s",
conn->request_info.uri, de->file_name);
mg_url_encode(href, href_encoded, PATH_MAX-1);
print_props(conn, href_encoded, &de->file);
@@ -3493,7 +3245,7 @@ void mg_websocket_handshake(struct mg_connection *conn) {
char buf[100], sha[20], b64_sha[sizeof(sha) * 2];
SHA1_CTX sha_ctx;
mg_snprintf(conn, buf, sizeof(buf), "%s%s",
mg_snprintf(buf, sizeof(buf), "%s%s",
mg_get_header(conn, "Sec-WebSocket-Key"), magic);
SHA1Init(&sha_ctx);
SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf));
build/src/string.c
+245
View File
@@ -0,0 +1,245 @@
#include "internal.h"
static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
for (; *src != '\0' && n > 1; n--) {
*dst++ = *src++;
}
*dst = '\0';
}
static int lowercase(const char *s) {
return tolower(* (const unsigned char *) s);
}
static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
int diff = 0;
if (len > 0)
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0' && --len > 0);
return diff;
}
static int mg_strcasecmp(const char *s1, const char *s2) {
int diff;
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0');
return diff;
}
static char * mg_strndup(const char *ptr, size_t len) {
char *p;
if ((p = (char *) malloc(len + 1)) != NULL) {
mg_strlcpy(p, ptr, len + 1);
}
return p;
}
static char * mg_strdup(const char *str) {
return mg_strndup(str, strlen(str));
}
static const char *mg_strcasestr(const char *big_str, const char *small_str) {
int i, big_len = strlen(big_str), small_len = strlen(small_str);
for (i = 0; i <= big_len - small_len; i++) {
if (mg_strncasecmp(big_str + i, small_str, small_len) == 0) {
return big_str + i;
}
}
return NULL;
}
// Like snprintf(), but never returns negative value, or a value
// that is larger than a supplied buffer.
// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
// in his audit report.
static int mg_vsnprintf(char *buf, size_t buflen, const char *fmt, va_list ap) {
int n;
if (buflen == 0) {
return 0;
}
n = vsnprintf(buf, buflen, fmt, ap);
if (n < 0) {
n = 0;
} else if (n >= (int) buflen) {
n = (int) buflen - 1;
}
buf[n] = '\0';
return n;
}
static int mg_snprintf(char *buf, size_t buflen,
PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(3, 4);
static int mg_snprintf(char *buf, size_t buflen, const char *fmt, ...) {
va_list ap;
int n;
va_start(ap, fmt);
n = mg_vsnprintf(buf, buflen, fmt, ap);
va_end(ap);
return n;
}
// Skip the characters until one of the delimiters characters found.
// 0-terminate resulting word. Skip the delimiter and following whitespaces.
// Advance pointer to buffer to the next word. Return found 0-terminated word.
// Delimiters can be quoted with quotechar.
static char *skip_quoted(char **buf, const char *delimiters,
const char *whitespace, char quotechar) {
char *p, *begin_word, *end_word, *end_whitespace;
begin_word = *buf;
end_word = begin_word + strcspn(begin_word, delimiters);
// Check for quotechar
if (end_word > begin_word) {
p = end_word - 1;
while (*p == quotechar) {
// If there is anything beyond end_word, copy it
if (*end_word == '\0') {
*p = '\0';
break;
} else {
size_t end_off = strcspn(end_word + 1, delimiters);
memmove (p, end_word, end_off + 1);
p += end_off; // p must correspond to end_word - 1
end_word += end_off + 1;
}
}
for (p++; p < end_word; p++) {
*p = '\0';
}
}
if (*end_word == '\0') {
*buf = end_word;
} else {
end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
for (p = end_word; p < end_whitespace; p++) {
*p = '\0';
}
*buf = end_whitespace;
}
return begin_word;
}
// Simplified version of skip_quoted without quote char
// and whitespace == delimiters
static char *skip(char **buf, const char *delimiters) {
return skip_quoted(buf, delimiters, delimiters, 0);
}
// Return HTTP header value, or NULL if not found.
static const char *get_header(const struct mg_request_info *ri,
const char *name) {
int i;
for (i = 0; i < ri->num_headers; i++)
if (!mg_strcasecmp(name, ri->http_headers[i].name))
return ri->http_headers[i].value;
return NULL;
}
const char *mg_get_header(const struct mg_connection *conn, const char *name) {
return get_header(&conn->request_info, name);
}
// A helper function for traversing a comma separated list of values.
// It returns a list pointer shifted to the next value, or NULL if the end
// of the list found.
// Value is stored in val vector. If value has form "x=y", then eq_val
// vector is initialized to point to the "y" part, and val vector length
// is adjusted to point only to "x".
static const char *next_option(const char *list, struct vec *val,
struct vec *eq_val) {
if (list == NULL || *list == '\0') {
// End of the list
list = NULL;
} else {
val->ptr = list;
if ((list = strchr(val->ptr, ',')) != NULL) {
// Comma found. Store length and shift the list ptr
val->len = list - val->ptr;
list++;
} else {
// This value is the last one
list = val->ptr + strlen(val->ptr);
val->len = list - val->ptr;
}
if (eq_val != NULL) {
// Value has form "x=y", adjust pointers and lengths
// so that val points to "x", and eq_val points to "y".
eq_val->len = 0;
eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
if (eq_val->ptr != NULL) {
eq_val->ptr++; // Skip over '=' character
eq_val->len = val->ptr + val->len - eq_val->ptr;
val->len = (eq_val->ptr - val->ptr) - 1;
}
}
}
return list;
}
// Perform case-insensitive match of string against pattern
static int match_prefix(const char *pattern, int pattern_len, const char *str) {
const char *or_str;
int i, j, len, res;
if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
res = match_prefix(pattern, or_str - pattern, str);
return res > 0 ? res :
match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
}
i = j = 0;
res = -1;
for (; i < pattern_len; i++, j++) {
if (pattern[i] == '?' && str[j] != '\0') {
continue;
} else if (pattern[i] == '$') {
return str[j] == '\0' ? j : -1;
} else if (pattern[i] == '*') {
i++;
if (pattern[i] == '*') {
i++;
len = (int) strlen(str + j);
} else {
len = (int) strcspn(str + j, "/");
}
if (i == pattern_len) {
return j + len;
}
do {
res = match_prefix(pattern + i, pattern_len - i, str + j + len);
} while (res == -1 && len-- > 0);
return res == -1 ? -1 : j + res + len;
} else if (lowercase(&pattern[i]) != lowercase(&str[j])) {
return -1;
}
}
return j;
}
mongoose.c
+268 -272
View File
@@ -458,6 +458,250 @@ struct de {
struct file file;
};
static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
for (; *src != '\0' && n > 1; n--) {
*dst++ = *src++;
}
*dst = '\0';
}
static int lowercase(const char *s) {
return tolower(* (const unsigned char *) s);
}
static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
int diff = 0;
if (len > 0)
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0' && --len > 0);
return diff;
}
static int mg_strcasecmp(const char *s1, const char *s2) {
int diff;
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0');
return diff;
}
static char * mg_strndup(const char *ptr, size_t len) {
char *p;
if ((p = (char *) malloc(len + 1)) != NULL) {
mg_strlcpy(p, ptr, len + 1);
}
return p;
}
static char * mg_strdup(const char *str) {
return mg_strndup(str, strlen(str));
}
static const char *mg_strcasestr(const char *big_str, const char *small_str) {
int i, big_len = strlen(big_str), small_len = strlen(small_str);
for (i = 0; i <= big_len - small_len; i++) {
if (mg_strncasecmp(big_str + i, small_str, small_len) == 0) {
return big_str + i;
}
}
return NULL;
}
// Like snprintf(), but never returns negative value, or a value
// that is larger than a supplied buffer.
// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
// in his audit report.
static int mg_vsnprintf(char *buf, size_t buflen, const char *fmt, va_list ap) {
int n;
if (buflen == 0) {
return 0;
}
n = vsnprintf(buf, buflen, fmt, ap);
if (n < 0) {
n = 0;
} else if (n >= (int) buflen) {
n = (int) buflen - 1;
}
buf[n] = '\0';
return n;
}
static int mg_snprintf(char *buf, size_t buflen,
PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(3, 4);
static int mg_snprintf(char *buf, size_t buflen, const char *fmt, ...) {
va_list ap;
int n;
va_start(ap, fmt);
n = mg_vsnprintf(buf, buflen, fmt, ap);
va_end(ap);
return n;
}
// Skip the characters until one of the delimiters characters found.
// 0-terminate resulting word. Skip the delimiter and following whitespaces.
// Advance pointer to buffer to the next word. Return found 0-terminated word.
// Delimiters can be quoted with quotechar.
static char *skip_quoted(char **buf, const char *delimiters,
const char *whitespace, char quotechar) {
char *p, *begin_word, *end_word, *end_whitespace;
begin_word = *buf;
end_word = begin_word + strcspn(begin_word, delimiters);
// Check for quotechar
if (end_word > begin_word) {
p = end_word - 1;
while (*p == quotechar) {
// If there is anything beyond end_word, copy it
if (*end_word == '\0') {
*p = '\0';
break;
} else {
size_t end_off = strcspn(end_word + 1, delimiters);
memmove (p, end_word, end_off + 1);
p += end_off; // p must correspond to end_word - 1
end_word += end_off + 1;
}
}
for (p++; p < end_word; p++) {
*p = '\0';
}
}
if (*end_word == '\0') {
*buf = end_word;
} else {
end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
for (p = end_word; p < end_whitespace; p++) {
*p = '\0';
}
*buf = end_whitespace;
}
return begin_word;
}
// Simplified version of skip_quoted without quote char
// and whitespace == delimiters
static char *skip(char **buf, const char *delimiters) {
return skip_quoted(buf, delimiters, delimiters, 0);
}
// Return HTTP header value, or NULL if not found.
static const char *get_header(const struct mg_request_info *ri,
const char *name) {
int i;
for (i = 0; i < ri->num_headers; i++)
if (!mg_strcasecmp(name, ri->http_headers[i].name))
return ri->http_headers[i].value;
return NULL;
}
const char *mg_get_header(const struct mg_connection *conn, const char *name) {
return get_header(&conn->request_info, name);
}
// A helper function for traversing a comma separated list of values.
// It returns a list pointer shifted to the next value, or NULL if the end
// of the list found.
// Value is stored in val vector. If value has form "x=y", then eq_val
// vector is initialized to point to the "y" part, and val vector length
// is adjusted to point only to "x".
static const char *next_option(const char *list, struct vec *val,
struct vec *eq_val) {
if (list == NULL || *list == '\0') {
// End of the list
list = NULL;
} else {
val->ptr = list;
if ((list = strchr(val->ptr, ',')) != NULL) {
// Comma found. Store length and shift the list ptr
val->len = list - val->ptr;
list++;
} else {
// This value is the last one
list = val->ptr + strlen(val->ptr);
val->len = list - val->ptr;
}
if (eq_val != NULL) {
// Value has form "x=y", adjust pointers and lengths
// so that val points to "x", and eq_val points to "y".
eq_val->len = 0;
eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
if (eq_val->ptr != NULL) {
eq_val->ptr++; // Skip over '=' character
eq_val->len = val->ptr + val->len - eq_val->ptr;
val->len = (eq_val->ptr - val->ptr) - 1;
}
}
}
return list;
}
// Perform case-insensitive match of string against pattern
static int match_prefix(const char *pattern, int pattern_len, const char *str) {
const char *or_str;
int i, j, len, res;
if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
res = match_prefix(pattern, or_str - pattern, str);
return res > 0 ? res :
match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
}
i = j = 0;
res = -1;
for (; i < pattern_len; i++, j++) {
if (pattern[i] == '?' && str[j] != '\0') {
continue;
} else if (pattern[i] == '$') {
return str[j] == '\0' ? j : -1;
} else if (pattern[i] == '*') {
i++;
if (pattern[i] == '*') {
i++;
len = (int) strlen(str + j);
} else {
len = (int) strcspn(str + j, "/");
}
if (i == pattern_len) {
return j + len;
}
do {
res = match_prefix(pattern + i, pattern_len - i, str + j + len);
} while (res == -1 && len-- > 0);
return res == -1 ? -1 : j + res + len;
} else if (lowercase(&pattern[i]) != lowercase(&str[j])) {
return -1;
}
}
return j;
}
static const char *month_names[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
@@ -618,254 +862,6 @@ const char *mg_version(void) {
return MONGOOSE_VERSION;
}
static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
for (; *src != '\0' && n > 1; n--) {
*dst++ = *src++;
}
*dst = '\0';
}
static int lowercase(const char *s) {
return tolower(* (const unsigned char *) s);
}
static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
int diff = 0;
if (len > 0)
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0' && --len > 0);
return diff;
}
static int mg_strcasecmp(const char *s1, const char *s2) {
int diff;
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0');
return diff;
}
static char * mg_strndup(const char *ptr, size_t len) {
char *p;
if ((p = (char *) malloc(len + 1)) != NULL) {
mg_strlcpy(p, ptr, len + 1);
}
return p;
}
static char * mg_strdup(const char *str) {
return mg_strndup(str, strlen(str));
}
static const char *mg_strcasestr(const char *big_str, const char *small_str) {
int i, big_len = strlen(big_str), small_len = strlen(small_str);
for (i = 0; i <= big_len - small_len; i++) {
if (mg_strncasecmp(big_str + i, small_str, small_len) == 0) {
return big_str + i;
}
}
return NULL;
}
// Like snprintf(), but never returns negative value, or a value
// that is larger than a supplied buffer.
// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
// in his audit report.
static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
const char *fmt, va_list ap) {
int n;
if (buflen == 0)
return 0;
n = vsnprintf(buf, buflen, fmt, ap);
if (n < 0) {
cry(conn, "vsnprintf error");
n = 0;
} else if (n >= (int) buflen) {
cry(conn, "truncating vsnprintf buffer: [%.*s]",
n > 200 ? 200 : n, buf);
n = (int) buflen - 1;
}
buf[n] = '\0';
return n;
}
static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
PRINTF_FORMAT_STRING(const char *fmt), ...)
PRINTF_ARGS(4, 5);
static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
const char *fmt, ...) {
va_list ap;
int n;
va_start(ap, fmt);
n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
va_end(ap);
return n;
}
// Skip the characters until one of the delimiters characters found.
// 0-terminate resulting word. Skip the delimiter and following whitespaces.
// Advance pointer to buffer to the next word. Return found 0-terminated word.
// Delimiters can be quoted with quotechar.
static char *skip_quoted(char **buf, const char *delimiters,
const char *whitespace, char quotechar) {
char *p, *begin_word, *end_word, *end_whitespace;
begin_word = *buf;
end_word = begin_word + strcspn(begin_word, delimiters);
// Check for quotechar
if (end_word > begin_word) {
p = end_word - 1;
while (*p == quotechar) {
// If there is anything beyond end_word, copy it
if (*end_word == '\0') {
*p = '\0';
break;
} else {
size_t end_off = strcspn(end_word + 1, delimiters);
memmove (p, end_word, end_off + 1);
p += end_off; // p must correspond to end_word - 1
end_word += end_off + 1;
}
}
for (p++; p < end_word; p++) {
*p = '\0';
}
}
if (*end_word == '\0') {
*buf = end_word;
} else {
end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
for (p = end_word; p < end_whitespace; p++) {
*p = '\0';
}
*buf = end_whitespace;
}
return begin_word;
}
// Simplified version of skip_quoted without quote char
// and whitespace == delimiters
static char *skip(char **buf, const char *delimiters) {
return skip_quoted(buf, delimiters, delimiters, 0);
}
// Return HTTP header value, or NULL if not found.
static const char *get_header(const struct mg_request_info *ri,
const char *name) {
int i;
for (i = 0; i < ri->num_headers; i++)
if (!mg_strcasecmp(name, ri->http_headers[i].name))
return ri->http_headers[i].value;
return NULL;
}
const char *mg_get_header(const struct mg_connection *conn, const char *name) {
return get_header(&conn->request_info, name);
}
// A helper function for traversing a comma separated list of values.
// It returns a list pointer shifted to the next value, or NULL if the end
// of the list found.
// Value is stored in val vector. If value has form "x=y", then eq_val
// vector is initialized to point to the "y" part, and val vector length
// is adjusted to point only to "x".
static const char *next_option(const char *list, struct vec *val,
struct vec *eq_val) {
if (list == NULL || *list == '\0') {
// End of the list
list = NULL;
} else {
val->ptr = list;
if ((list = strchr(val->ptr, ',')) != NULL) {
// Comma found. Store length and shift the list ptr
val->len = list - val->ptr;
list++;
} else {
// This value is the last one
list = val->ptr + strlen(val->ptr);
val->len = list - val->ptr;
}
if (eq_val != NULL) {
// Value has form "x=y", adjust pointers and lengths
// so that val points to "x", and eq_val points to "y".
eq_val->len = 0;
eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
if (eq_val->ptr != NULL) {
eq_val->ptr++; // Skip over '=' character
eq_val->len = val->ptr + val->len - eq_val->ptr;
val->len = (eq_val->ptr - val->ptr) - 1;
}
}
}
return list;
}
// Perform case-insensitive match of string against pattern
static int match_prefix(const char *pattern, int pattern_len, const char *str) {
const char *or_str;
int i, j, len, res;
if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
res = match_prefix(pattern, or_str - pattern, str);
return res > 0 ? res :
match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
}
i = j = 0;
res = -1;
for (; i < pattern_len; i++, j++) {
if (pattern[i] == '?' && str[j] != '\0') {
continue;
} else if (pattern[i] == '$') {
return str[j] == '\0' ? j : -1;
} else if (pattern[i] == '*') {
i++;
if (pattern[i] == '*') {
i++;
len = (int) strlen(str + j);
} else {
len = (int) strcspn(str + j, "/");
}
if (i == pattern_len) {
return j + len;
}
do {
res = match_prefix(pattern + i, pattern_len - i, str + j + len);
} while (res == -1 && len-- > 0);
return res == -1 ? -1 : j + res + len;
} else if (lowercase(&pattern[i]) != lowercase(&str[j])) {
return -1;
}
}
return j;
}
// HTTP 1.1 assumes keep alive if "Connection:" header is not set
// This function must tolerate situations when connection info is not
// set up, for example if request parsing failed.
@@ -902,11 +898,11 @@ static void send_http_error(struct mg_connection *conn, int status,
// Errors 1xx, 204 and 304 MUST NOT send a body
if (status > 199 && status != 204 && status != 304) {
len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
len = mg_snprintf(buf, sizeof(buf), "Error %d: %s", status, reason);
buf[len++] = '\n';
va_start(ap, fmt);
len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
len += mg_vsnprintf(buf + len, sizeof(buf) - len, fmt, ap);
va_end(ap);
}
DEBUG_TRACE(("[%s]", buf));
@@ -1293,7 +1289,7 @@ static pid_t spawn_process(struct mg_connection *conn, const char *prog,
}
GetFullPathNameA(dir, sizeof(full_dir), full_dir, NULL);
mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s\"%s\\%s\"",
mg_snprintf(cmdline, sizeof(cmdline), "%s%s\"%s\\%s\"",
interp, interp[0] == '\0' ? "" : " ", full_dir, prog);
DEBUG_TRACE(("Running [%s]", cmdline));
@@ -1770,12 +1766,12 @@ static int convert_uri_to_file_name(struct mg_connection *conn, char *buf,
// Using buf_len - 1 because memmove() for PATH_INFO may shift part
// of the path one byte on the right.
// If document_root is NULL, leave the file empty.
mg_snprintf(conn, buf, buf_len - 1, "%s%s", root, uri);
mg_snprintf(buf, buf_len - 1, "%s%s", root, uri);
rewrite = conn->ctx->config[REWRITE];
while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
mg_snprintf(conn, buf, buf_len - 1, "%.*s%s", (int) b.len, b.ptr,
mg_snprintf(buf, buf_len - 1, "%.*s%s", (int) b.len, b.ptr,
uri + match_len);
break;
}
@@ -2286,7 +2282,7 @@ static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
// Important: using local struct file to test path for is_directory flag.
// If filep is used, mg_stat() makes it appear as if auth file was opened.
} else if (mg_stat(path, &file) && file.is_directory) {
mg_snprintf(conn, name, sizeof(name), "%s%c%s",
mg_snprintf(name, sizeof(name), "%s%c%s",
path, '/', PASSWORDS_FILE_NAME);
fp = mg_fopen(name, "r");
} else {
@@ -2294,7 +2290,7 @@ static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
for (p = path, e = p + strlen(p) - 1; e > p; e--)
if (e[0] == '/')
break;
mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
mg_snprintf(name, sizeof(name), "%.*s%c%s",
(int) (e - p), p, '/', PASSWORDS_FILE_NAME);
fp = mg_fopen(name, "r");
}
@@ -2406,7 +2402,7 @@ static int check_authorization(struct mg_connection *conn, const char *path) {
list = conn->ctx->config[PROTECT_URI];
while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
mg_snprintf(conn, fname, sizeof(fname), "%.*s",
mg_snprintf(fname, sizeof(fname), "%.*s",
(int) filename_vec.len, filename_vec.ptr);
if ((fp = mg_fopen(fname, "r")) == NULL) {
cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
@@ -2571,20 +2567,20 @@ static void print_dir_entry(const struct de *de) {
const char *slash = de->file.is_directory ? "/" : "";
if (de->file.is_directory) {
mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
mg_snprintf(size, sizeof(size), "%s", "[DIRECTORY]");
} else {
// We use (signed) cast below because MSVC 6 compiler cannot
// convert unsigned __int64 to double. Sigh.
if (de->file.size < 1024) {
mg_snprintf(de->conn, size, sizeof(size), "%d", (int) de->file.size);
mg_snprintf(size, sizeof(size), "%d", (int) de->file.size);
} else if (de->file.size < 0x100000) {
mg_snprintf(de->conn, size, sizeof(size),
mg_snprintf(size, sizeof(size),
"%.1fk", (double) de->file.size / 1024.0);
} else if (de->file.size < 0x40000000) {
mg_snprintf(de->conn, size, sizeof(size),
mg_snprintf(size, sizeof(size),
"%.1fM", (double) de->file.size / 1048576);
} else {
mg_snprintf(de->conn, size, sizeof(size),
mg_snprintf(size, sizeof(size),
"%.1fG", (double) de->file.size / 1073741824);
}
}
@@ -2654,7 +2650,7 @@ static int scan_directory(struct mg_connection *conn, const char *dir,
continue;
}
mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
// If we don't memset stat structure to zero, mtime will have
// garbage and strftime() will segfault later on in
@@ -2690,7 +2686,7 @@ static int remove_directory(struct mg_connection *conn, const char *dir) {
continue;
}
mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
// If we don't memset stat structure to zero, mtime will have
// garbage and strftime() will segfault later on in
@@ -2906,7 +2902,7 @@ static void handle_file_request(struct mg_connection *conn, const char *path,
}
conn->status_code = 206;
cl = n == 2 ? (r2 > cl ? cl : r2) - r1 + 1: cl - r1;
mg_snprintf(conn, range, sizeof(range),
mg_snprintf(range, sizeof(range),
"Content-Range: bytes "
"%" INT64_FMT "-%"
INT64_FMT "/%" INT64_FMT "\r\n",
@@ -3183,7 +3179,7 @@ static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
// Copy VARIABLE=VALUE\0 string into the free space
va_start(ap, fmt);
n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
n = mg_vsnprintf(added, (size_t) space, fmt, ap);
va_end(ap);
// Make sure we do not overflow buffer and the envp array
@@ -3336,7 +3332,7 @@ static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
// CGI must be executed in its own directory. 'dir' must point to the
// directory containing executable program, 'p' must point to the
// executable program name relative to 'dir'.
(void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
(void) mg_snprintf(dir, sizeof(dir), "%s", prog);
if ((p = strrchr(dir, '/')) != NULL) {
*p++ = '\0';
} else {
@@ -3589,20 +3585,20 @@ static void do_ssi_include(struct mg_connection *conn, const char *ssi,
// of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
// File name is relative to the webserver root
(void) mg_snprintf(conn, path, sizeof(path), "%s%c%s",
(void) mg_snprintf(path, sizeof(path), "%s%c%s",
conn->ctx->config[DOCUMENT_ROOT], '/', file_name);
} else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) {
// File name is relative to the webserver working directory
// or it is absolute system path
(void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
(void) mg_snprintf(path, sizeof(path), "%s", file_name);
} else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 ||
sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
// File name is relative to the currect document
(void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
(void) mg_snprintf(path, sizeof(path), "%s", ssi);
if ((p = strrchr(path, '/')) != NULL) {
p[1] = '\0';
}
(void) mg_snprintf(conn, path + strlen(path),
(void) mg_snprintf(path + strlen(path),
sizeof(path) - strlen(path), "%s", file_name);
} else {
cry(conn, "Bad SSI #include: [%s]", tag);
@@ -3760,7 +3756,7 @@ static void print_dav_dir_entry(struct de *de, void *data) {
char href[PATH_MAX];
char href_encoded[PATH_MAX];
struct mg_connection *conn = (struct mg_connection *) data;
mg_snprintf(conn, href, sizeof(href), "%s%s",
mg_snprintf(href, sizeof(href), "%s%s",
conn->request_info.uri, de->file_name);
mg_url_encode(href, href_encoded, PATH_MAX-1);
print_props(conn, href_encoded, &de->file);
@@ -3952,7 +3948,7 @@ void mg_websocket_handshake(struct mg_connection *conn) {
char buf[100], sha[20], b64_sha[sizeof(sha) * 2];
SHA1_CTX sha_ctx;
mg_snprintf(conn, buf, sizeof(buf), "%s%s",
mg_snprintf(buf, sizeof(buf), "%s%s",
mg_get_header(conn, "Sec-WebSocket-Key"), magic);
SHA1Init(&sha_ctx);
SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf));