-#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <assert.h>
#include "putty.h"
+/* ----------------------------------------------------------------------
+ * String handling routines.
+ */
+
+char *dupstr(const char *s)
+{
+ int len = strlen(s);
+ char *p = smalloc(len + 1);
+ strcpy(p, s);
+ return p;
+}
+
+/* Allocate the concatenation of N strings. Terminate arg list with NULL. */
+char *dupcat(const char *s1, ...)
+{
+ int len;
+ char *p, *q, *sn;
+ va_list ap;
+
+ len = strlen(s1);
+ va_start(ap, s1);
+ while (1) {
+ sn = va_arg(ap, char *);
+ if (!sn)
+ break;
+ len += strlen(sn);
+ }
+ va_end(ap);
+
+ p = smalloc(len + 1);
+ strcpy(p, s1);
+ q = p + strlen(p);
+
+ va_start(ap, s1);
+ while (1) {
+ sn = va_arg(ap, char *);
+ if (!sn)
+ break;
+ strcpy(q, sn);
+ q += strlen(q);
+ }
+ va_end(ap);
+
+ return p;
+}
+
/*
+ * Do an sprintf(), but into a custom-allocated buffer.
+ *
+ * Irritatingly, we don't seem to be able to do this portably using
+ * vsnprintf(), because there appear to be issues with re-using the
+ * same va_list for two calls, and the excellent C99 va_copy is not
+ * yet widespread. Bah. Instead I'm going to do a horrid, horrid
+ * hack, in which I trawl the format string myself, work out the
+ * maximum length of each format component, and resize the buffer
+ * before printing it.
+ */
+char *dupprintf(const char *fmt, ...)
+{
+ char *ret;
+ va_list ap;
+ va_start(ap, fmt);
+ ret = dupvprintf(fmt, ap);
+ va_end(ap);
+ return ret;
+}
+char *dupvprintf(const char *fmt, va_list ap)
+{
+ char *buf;
+ int len, size;
+
+ buf = smalloc(512);
+ size = 512;
+
+ while (1) {
+#ifdef _WINDOWS
+#define vsnprintf _vsnprintf
+#endif
+ len = vsnprintf(buf, size, fmt, ap);
+ if (len >= 0 && len < size) {
+ /* This is the C99-specified criterion for snprintf to have
+ * been completely successful. */
+ return buf;
+ } else if (len > 0) {
+ /* This is the C99 error condition: the returned length is
+ * the required buffer size not counting the NUL. */
+ size = len + 1;
+ } else {
+ /* This is the pre-C99 glibc error condition: <0 means the
+ * buffer wasn't big enough, so we enlarge it a bit and hope. */
+ size += 512;
+ }
+ buf = srealloc(buf, size);
+ }
+}
+
+/* ----------------------------------------------------------------------
+ * Base64 encoding routine. This is required in public-key writing
+ * but also in HTTP proxy handling, so it's centralised here.
+ */
+
+void base64_encode_atom(unsigned char *data, int n, char *out)
+{
+ static const char base64_chars[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+ unsigned word;
+
+ word = data[0] << 16;
+ if (n > 1)
+ word |= data[1] << 8;
+ if (n > 2)
+ word |= data[2];
+ out[0] = base64_chars[(word >> 18) & 0x3F];
+ out[1] = base64_chars[(word >> 12) & 0x3F];
+ if (n > 1)
+ out[2] = base64_chars[(word >> 6) & 0x3F];
+ else
+ out[2] = '=';
+ if (n > 2)
+ out[3] = base64_chars[word & 0x3F];
+ else
+ out[3] = '=';
+}
+
+/* ----------------------------------------------------------------------
+ * Generic routines to deal with send buffers: a linked list of
+ * smallish blocks, with the operations
+ *
+ * - add an arbitrary amount of data to the end of the list
+ * - remove the first N bytes from the list
+ * - return a (pointer,length) pair giving some initial data in
+ * the list, suitable for passing to a send or write system
+ * call
+ * - retrieve a larger amount of initial data from the list
+ * - return the current size of the buffer chain in bytes
+ */
+
+#define BUFFER_GRANULE 512
+
+struct bufchain_granule {
+ struct bufchain_granule *next;
+ int buflen, bufpos;
+ char buf[BUFFER_GRANULE];
+};
+
+void bufchain_init(bufchain *ch)
+{
+ ch->head = ch->tail = NULL;
+ ch->buffersize = 0;
+}
+
+void bufchain_clear(bufchain *ch)
+{
+ struct bufchain_granule *b;
+ while (ch->head) {
+ b = ch->head;
+ ch->head = ch->head->next;
+ sfree(b);
+ }
+ ch->tail = NULL;
+ ch->buffersize = 0;
+}
+
+int bufchain_size(bufchain *ch)
+{
+ return ch->buffersize;
+}
+
+void bufchain_add(bufchain *ch, const void *data, int len)
+{
+ const char *buf = (const char *)data;
+
+ ch->buffersize += len;
+
+ if (ch->tail && ch->tail->buflen < BUFFER_GRANULE) {
+ int copylen = min(len, BUFFER_GRANULE - ch->tail->buflen);
+ memcpy(ch->tail->buf + ch->tail->buflen, buf, copylen);
+ buf += copylen;
+ len -= copylen;
+ ch->tail->buflen += copylen;
+ }
+ while (len > 0) {
+ int grainlen = min(len, BUFFER_GRANULE);
+ struct bufchain_granule *newbuf;
+ newbuf = smalloc(sizeof(struct bufchain_granule));
+ newbuf->bufpos = 0;
+ newbuf->buflen = grainlen;
+ memcpy(newbuf->buf, buf, grainlen);
+ buf += grainlen;
+ len -= grainlen;
+ if (ch->tail)
+ ch->tail->next = newbuf;
+ else
+ ch->head = ch->tail = newbuf;
+ newbuf->next = NULL;
+ ch->tail = newbuf;
+ }
+}
+
+void bufchain_consume(bufchain *ch, int len)
+{
+ struct bufchain_granule *tmp;
+
+ assert(ch->buffersize >= len);
+ while (len > 0) {
+ int remlen = len;
+ assert(ch->head != NULL);
+ if (remlen >= ch->head->buflen - ch->head->bufpos) {
+ remlen = ch->head->buflen - ch->head->bufpos;
+ tmp = ch->head;
+ ch->head = tmp->next;
+ sfree(tmp);
+ if (!ch->head)
+ ch->tail = NULL;
+ } else
+ ch->head->bufpos += remlen;
+ ch->buffersize -= remlen;
+ len -= remlen;
+ }
+}
+
+void bufchain_prefix(bufchain *ch, void **data, int *len)
+{
+ *len = ch->head->buflen - ch->head->bufpos;
+ *data = ch->head->buf + ch->head->bufpos;
+}
+
+void bufchain_fetch(bufchain *ch, void *data, int len)
+{
+ struct bufchain_granule *tmp;
+ char *data_c = (char *)data;
+
+ tmp = ch->head;
+
+ assert(ch->buffersize >= len);
+ while (len > 0) {
+ int remlen = len;
+
+ assert(tmp != NULL);
+ if (remlen >= tmp->buflen - tmp->bufpos)
+ remlen = tmp->buflen - tmp->bufpos;
+ memcpy(data_c, tmp->buf + tmp->bufpos, remlen);
+
+ tmp = tmp->next;
+ len -= remlen;
+ data_c += remlen;
+ }
+}
+
+/* ----------------------------------------------------------------------
* My own versions of malloc, realloc and free. Because I want
* malloc and realloc to bomb out and exit the program if they run
* out of memory, realloc to reliably call malloc if passed a NULL
static unsigned short *minefield_admin = NULL;
static void *minefield_pages = NULL;
-static void minefield_admin_hide(int hide) {
+static void minefield_admin_hide(int hide)
+{
int access = hide ? PAGE_NOACCESS : PAGE_READWRITE;
- VirtualProtect(minefield_admin, minefield_npages*2, access, NULL);
+ VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL);
}
-static void minefield_init(void) {
+static void minefield_init(void)
+{
int size;
int admin_size;
int i;
- for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) &~ 0xFFF) {
- printf("trying size=%d\n", size);
- minefield_region = VirtualAlloc(NULL, size,
- MEM_RESERVE, PAGE_NOACCESS);
- if (minefield_region)
- break;
+ for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) {
+ minefield_region = VirtualAlloc(NULL, size,
+ MEM_RESERVE, PAGE_NOACCESS);
+ if (minefield_region)
+ break;
}
minefield_size = size;
- printf("got region %p size %d\n", minefield_region, minefield_size);
/*
* Firstly, allocate a section of that to be the admin block.
*/
minefield_admin = minefield_region;
minefield_npages = minefield_size / PAGESIZE;
- admin_size = (minefield_npages * 2 + PAGESIZE-1) &~ (PAGESIZE-1);
+ admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1);
minefield_npages = (minefield_size - admin_size) / PAGESIZE;
- minefield_pages = (char *)minefield_region + admin_size;
- printf("admin at %p, pages at %p, npages %x, admin_size %x\n",
- minefield_admin, minefield_pages, minefield_npages,
- admin_size);
+ minefield_pages = (char *) minefield_region + admin_size;
/*
* Commit the admin region.
*/
VirtualAlloc(minefield_admin, minefield_npages * 2,
- MEM_COMMIT, PAGE_READWRITE);
+ MEM_COMMIT, PAGE_READWRITE);
/*
* Mark all pages as unused (0xFFFF).
*/
for (i = 0; i < minefield_npages; i++)
- minefield_admin[i] = 0xFFFF;
+ minefield_admin[i] = 0xFFFF;
/*
* Hide the admin region.
minefield_initialised = 1;
}
-static void minefield_bomb(void) {
- div(1, *(int*)minefield_pages);
+static void minefield_bomb(void)
+{
+ div(1, *(int *) minefield_pages);
}
-static void *minefield_alloc(int size) {
+static void *minefield_alloc(int size)
+{
int npages;
int pos, lim, region_end, region_start;
int start;
int i;
- npages = (size + PAGESIZE-1) / PAGESIZE;
+ npages = (size + PAGESIZE - 1) / PAGESIZE;
minefield_admin_hide(0);
pos = minefield_curpos;
lim = minefield_npages;
while (1) {
- /* Skip over used pages. */
- while (pos < lim && minefield_admin[pos] != 0xFFFF)
- pos++;
- /* Count unused pages. */
- start = pos;
- while (pos < lim && pos - start < npages+2 &&
- minefield_admin[pos] == 0xFFFF)
- pos++;
- if (pos - start == npages+2)
- break;
- /* If we've reached the limit, reset the limit or stop. */
- if (pos >= lim) {
- if (lim == minefield_npages) {
- /* go round and start again at zero */
- lim = minefield_curpos;
- pos = 0;
- } else {
- minefield_admin_hide(1);
- return NULL;
- }
- }
+ /* Skip over used pages. */
+ while (pos < lim && minefield_admin[pos] != 0xFFFF)
+ pos++;
+ /* Count unused pages. */
+ start = pos;
+ while (pos < lim && pos - start < npages + 2 &&
+ minefield_admin[pos] == 0xFFFF)
+ pos++;
+ if (pos - start == npages + 2)
+ break;
+ /* If we've reached the limit, reset the limit or stop. */
+ if (pos >= lim) {
+ if (lim == minefield_npages) {
+ /* go round and start again at zero */
+ lim = minefield_curpos;
+ pos = 0;
+ } else {
+ minefield_admin_hide(1);
+ return NULL;
+ }
+ }
}
- minefield_curpos = pos-1;
+ minefield_curpos = pos - 1;
/*
* We have npages+2 unused pages starting at start. We leave
* the first and last of these alone and use the rest.
*/
- region_end = (start + npages+1) * PAGESIZE;
+ region_end = (start + npages + 1) * PAGESIZE;
region_start = region_end - size;
/* FIXME: could align here if we wanted */
/*
* Update the admin region.
*/
- for (i = start + 2; i < start + npages-1; i++)
- minefield_admin[i] = 0xFFFE; /* used but no region starts here */
- minefield_admin[start+1] = region_start % PAGESIZE;
+ for (i = start + 2; i < start + npages + 1; i++)
+ minefield_admin[i] = 0xFFFE; /* used but no region starts here */
+ minefield_admin[start + 1] = region_start % PAGESIZE;
minefield_admin_hide(1);
- VirtualAlloc((char *)minefield_pages + region_start, size,
- MEM_COMMIT, PAGE_READWRITE);
- return (char *)minefield_pages + region_start;
+ VirtualAlloc((char *) minefield_pages + region_start, size,
+ MEM_COMMIT, PAGE_READWRITE);
+ return (char *) minefield_pages + region_start;
}
-static void minefield_free(void *ptr) {
+static void minefield_free(void *ptr)
+{
int region_start, i, j;
minefield_admin_hide(0);
- region_start = (char *)ptr - (char *)minefield_pages;
+ region_start = (char *) ptr - (char *) minefield_pages;
i = region_start / PAGESIZE;
if (i < 0 || i >= minefield_npages ||
- minefield_admin[i] != region_start % PAGESIZE)
- minefield_bomb();
+ minefield_admin[i] != region_start % PAGESIZE)
+ minefield_bomb();
for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) {
- minefield_admin[j] = 0xFFFF;
+ minefield_admin[j] = 0xFFFF;
}
- VirtualFree(ptr, j*PAGESIZE - region_start, MEM_DECOMMIT);
+ VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT);
minefield_admin_hide(1);
}
-static int minefield_get_size(void *ptr) {
+static int minefield_get_size(void *ptr)
+{
int region_start, i, j;
minefield_admin_hide(0);
- region_start = (char *)ptr - (char *)minefield_pages;
+ region_start = (char *) ptr - (char *) minefield_pages;
i = region_start / PAGESIZE;
if (i < 0 || i >= minefield_npages ||
- minefield_admin[i] != region_start % PAGESIZE)
- minefield_bomb();
+ minefield_admin[i] != region_start % PAGESIZE)
+ minefield_bomb();
for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++);
minefield_admin_hide(1);
- return j*PAGESIZE - region_start;
+ return j * PAGESIZE - region_start;
}
-static void *minefield_c_malloc(size_t size) {
- if (!minefield_initialised) minefield_init();
+static void *minefield_c_malloc(size_t size)
+{
+ if (!minefield_initialised)
+ minefield_init();
return minefield_alloc(size);
}
-static void minefield_c_free(void *p) {
- if (!minefield_initialised) minefield_init();
+static void minefield_c_free(void *p)
+{
+ if (!minefield_initialised)
+ minefield_init();
minefield_free(p);
}
* realloc _always_ moves the chunk, for rapid detection of code
* that assumes it won't.
*/
-static void *minefield_c_realloc(void *p, size_t size) {
+static void *minefield_c_realloc(void *p, size_t size)
+{
size_t oldsize;
void *q;
- if (!minefield_initialised) minefield_init();
+ if (!minefield_initialised)
+ minefield_init();
q = minefield_alloc(size);
oldsize = minefield_get_size(p);
memcpy(q, p, (oldsize < size ? oldsize : size));
return q;
}
-#endif /* MINEFIELD */
+#endif /* MINEFIELD */
#ifdef MALLOC_LOG
static FILE *fp = NULL;
-void mlog(char *file, int line) {
+static char *mlog_file = NULL;
+static int mlog_line = 0;
+
+void mlog(char *file, int line)
+{
+ mlog_file = file;
+ mlog_line = line;
if (!fp) {
fp = fopen("putty_mem.log", "w");
setvbuf(fp, NULL, _IONBF, BUFSIZ);
}
if (fp)
- fprintf (fp, "%s:%d: ", file, line);
+ fprintf(fp, "%s:%d: ", file, line);
}
#endif
-void *safemalloc(size_t size) {
+void *safemalloc(size_t size)
+{
void *p;
#ifdef MINEFIELD
- p = minefield_c_malloc (size);
+ p = minefield_c_malloc(size);
#else
- p = malloc (size);
+ p = malloc(size);
#endif
if (!p) {
- MessageBox(NULL, "Out of memory!", "PuTTY Fatal Error",
- MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
- exit(1);
+ char str[200];
+#ifdef MALLOC_LOG
+ sprintf(str, "Out of memory! (%s:%d, size=%d)",
+ mlog_file, mlog_line, size);
+ fprintf(fp, "*** %s\n", str);
+ fclose(fp);
+#else
+ strcpy(str, "Out of memory!");
+#endif
+ modalfatalbox(str);
}
#ifdef MALLOC_LOG
if (fp)
return p;
}
-void *saferealloc(void *ptr, size_t size) {
+void *saferealloc(void *ptr, size_t size)
+{
void *p;
if (!ptr) {
#ifdef MINEFIELD
- p = minefield_c_malloc (size);
+ p = minefield_c_malloc(size);
#else
- p = malloc (size);
+ p = malloc(size);
#endif
} else {
#ifdef MINEFIELD
- p = minefield_c_realloc (ptr, size);
+ p = minefield_c_realloc(ptr, size);
#else
- p = realloc (ptr, size);
+ p = realloc(ptr, size);
#endif
}
if (!p) {
- MessageBox(NULL, "Out of memory!", "PuTTY Fatal Error",
- MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
- exit(1);
+ char str[200];
+#ifdef MALLOC_LOG
+ sprintf(str, "Out of memory! (%s:%d, size=%d)",
+ mlog_file, mlog_line, size);
+ fprintf(fp, "*** %s\n", str);
+ fclose(fp);
+#else
+ strcpy(str, "Out of memory!");
+#endif
+ modalfatalbox(str);
}
#ifdef MALLOC_LOG
if (fp)
return p;
}
-void safefree(void *ptr) {
+void safefree(void *ptr)
+{
if (ptr) {
#ifdef MALLOC_LOG
if (fp)
fprintf(fp, "free(%p)\n", ptr);
#endif
#ifdef MINEFIELD
- minefield_c_free (ptr);
+ minefield_c_free(ptr);
#else
- free (ptr);
+ free(ptr);
#endif
}
#ifdef MALLOC_LOG
#endif
}
+/* ----------------------------------------------------------------------
+ * Debugging routines.
+ */
+
#ifdef DEBUG
static FILE *debug_fp = NULL;
+static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
static int debug_got_console = 0;
-void dprintf(char *fmt, ...) {
- char buf[2048];
+static void dputs(char *buf)
+{
DWORD dw;
- va_list ap;
if (!debug_got_console) {
- AllocConsole();
- debug_got_console = 1;
+ if (AllocConsole()) {
+ debug_got_console = 1;
+ debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
+ }
}
if (!debug_fp) {
debug_fp = fopen("debug.log", "w");
}
- va_start(ap, fmt);
- vsprintf(buf, fmt, ap);
- WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), buf, strlen(buf), &dw, NULL);
+ if (debug_hdl != INVALID_HANDLE_VALUE) {
+ WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
+ }
fputs(buf, debug_fp);
fflush(debug_fp);
+}
+
+
+void dprintf(char *fmt, ...)
+{
+ char *buf;
+ va_list ap;
+
+ va_start(ap, fmt);
+ buf = dupvprintf(fmt, ap);
+ dputs(buf);
+ sfree(buf);
va_end(ap);
}
-#endif
+
+
+void debug_memdump(void *buf, int len, int L)
+{
+ int i;
+ unsigned char *p = buf;
+ char foo[17];
+ if (L) {
+ int delta;
+ dprintf("\t%d (0x%x) bytes:\n", len, len);
+ delta = 15 & (int) p;
+ p -= delta;
+ len += delta;
+ }
+ for (; 0 < len; p += 16, len -= 16) {
+ dputs(" ");
+ if (L)
+ dprintf("%p: ", p);
+ strcpy(foo, "................"); /* sixteen dots */
+ for (i = 0; i < 16 && i < len; ++i) {
+ if (&p[i] < (unsigned char *) buf) {
+ dputs(" "); /* 3 spaces */
+ foo[i] = ' ';
+ } else {
+ dprintf("%c%02.2x",
+ &p[i] != (unsigned char *) buf
+ && i % 4 ? '.' : ' ', p[i]
+ );
+ if (p[i] >= ' ' && p[i] <= '~')
+ foo[i] = (char) p[i];
+ }
+ }
+ foo[i] = '\0';
+ dprintf("%*s%s\n", (16 - i) * 3 + 2, "", foo);
+ }
+}
+
+#endif /* def DEBUG */
projects / u / mdw / putty / blobdiff