X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=secnet.git;a=blobdiff_plain;f=util.c;h=63fe76f4451a80e2a6c266fffb8c1aabd878d20f;hp=997979ac93b4e99b498602077f72519755eb68c6;hb=26f727b913e16936c8f319fde9d7e06b677345f6;hpb=59938e0ed0c8ac267c3715a25a0a3ed27f7a7e47

diff --git a/util.c b/util.c
index 997979a..63fe76f 100644
--- a/util.c
+++ b/util.c
@@ -74,6 +74,12 @@ void *safe_malloc(size_t size, const char *message)
     }
     return r;
 }
+void *safe_malloc_ary(size_t size, size_t count, const char *message) {
+    if (count >= INT_MAX/size) {
+	fatal("array allocation overflow: %s", message);
+    }
+    return safe_malloc(size*count, message);
+}
 
 /* Convert a buffer into its MP_INT representation */
 void read_mpbin(MP_INT *a, uint8_t *bin, int binsize)
@@ -133,7 +139,7 @@ static uint8_t hexval(uint8_t c)
 }
 
 /* Convert a MP_INT into a buffer; return length; truncate if necessary */
-uint32_t write_mpbin(MP_INT *a, uint8_t *buffer, uint32_t buflen)
+int32_t write_mpbin(MP_INT *a, uint8_t *buffer, int32_t buflen)
 {
     char *hb;
     int i,j,l;
@@ -160,6 +166,7 @@ static const char *phases[NR_PHASES]={
     "PHASE_GETOPTS",
     "PHASE_READCONFIG",
     "PHASE_SETUP",
+    "PHASE_DAEMONIZE",
     "PHASE_GETRESOURCES",
     "PHASE_DROPPRIV",
     "PHASE_RUN",
@@ -218,7 +225,7 @@ struct buffer {
 };
 
 void buffer_assert_free(struct buffer_if *buffer, cstring_t file,
-			uint32_t line)
+			int line)
 {
     if (!buffer->free) {
 	fatal("BUF_ASSERT_FREE, %s line %d, owned by %s",
@@ -227,7 +234,7 @@ void buffer_assert_free(struct buffer_if *buffer, cstring_t file,
 }
 
 void buffer_assert_used(struct buffer_if *buffer, cstring_t file,
-			uint32_t line)
+			int line)
 {
     if (buffer->free) {
 	fatal("BUF_ASSERT_USED, %s line %d, last owned by %s",
@@ -235,30 +242,32 @@ void buffer_assert_used(struct buffer_if *buffer, cstring_t file,
     }
 }
 
-void buffer_init(struct buffer_if *buffer, uint32_t max_start_pad)
+void buffer_init(struct buffer_if *buffer, int32_t max_start_pad)
 {
     buffer->start=buffer->base+max_start_pad;
     buffer->size=0;
 }
 
-void *buf_append(struct buffer_if *buf, uint32_t amount) {
+void *buf_append(struct buffer_if *buf, int32_t amount) {
     void *p;
+    assert(buf->size <= buf->len - amount);
     p=buf->start + buf->size;
     buf->size+=amount;
     return p;
 }
 
-void *buf_prepend(struct buffer_if *buf, uint32_t amount) {
+void *buf_prepend(struct buffer_if *buf, int32_t amount) {
+    assert(amount <= buf->start - buf->base);
     buf->size+=amount;
     return buf->start-=amount;
 }
 
-void *buf_unappend(struct buffer_if *buf, uint32_t amount) {
+void *buf_unappend(struct buffer_if *buf, int32_t amount) {
     if (buf->size < amount) return 0;
     return buf->start+(buf->size-=amount);
 }
 
-void *buf_unprepend(struct buffer_if *buf, uint32_t amount) {
+void *buf_unprepend(struct buffer_if *buf, int32_t amount) {
     void *p;
     p=buf->start;
     buf->start+=amount;
@@ -270,14 +279,15 @@ void *buf_unprepend(struct buffer_if *buf, uint32_t amount) {
    network byte order. */
 void buf_append_string(struct buffer_if *buf, cstring_t s)
 {
-    uint16_t len;
+    size_t len;
 
     len=strlen(s);
+    /* fixme: if string is longer than 65535, result is a corrupted packet */
     buf_append_uint16(buf,len);
     memcpy(buf_append(buf,len),s,len);
 }
 
-void buffer_new(struct buffer_if *buf, uint32_t len)
+void buffer_new(struct buffer_if *buf, int32_t len)
 {
     buf->free=True;
     buf->owner=NULL;