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build: enable missing OpenSSF-recommended warnings, with fixes

Browse Source 
Ref:
https://best.openssf.org/Compiler-Hardening-Guides/Compiler-Options-Hardening-Guide-for-C-and-C++.html
(2023-11-29)

Enable new warnings:

- replace `-Wno-sign-conversion` with `-Wsign-conversion`.

  Fix them in example, tests and wincng. There remain about 360 of these
  warnings in `src`. Add a TODO item for those and disable `-Werror` for
  this particular warning.

- enable `-Wformat=2` for clang (in both cmake and autotools).

- enable `__attribute__((format))` for `_libssh2_debug()`,
  `_libssh2_snprintf()` and in tests for `run_command()`.

  `LIBSSH2_PRINTF()` copied from `CURL_TEMP_PRINTF()` in curl.

- enable `-Wimplicit-fallthrough`.

- enable `-Wtrampolines`.

Fix them:

- src: replace obsolete fall-through-comments with
  `__attribute__((fallthrough))`.

- wincng: fix `-Wsign-conversion` warnings.

- tests: fix `-Wsign-conversion` warnings.

- example: fix `-Wsign-conversion` warnings.

- src: fix `-Wformat` issues in trace calls.

  Also, where necessary fix `int` and `unsigned char` casts to
  `unsigned int` and adjust printf format strings. These were not
  causing compiler warnings.

  Cast large types to `long` to avoid dealing with printf masks for
  `size_t` and other C99 types. Existing code often used `int` for this.
  I'll update them to `long` in an upcoming commit.

- tests: fix `-Wformat` warning.

- silence `-Wformat-nonliteral` warnings.

- mbedtls: silence `-Wsign-conversion`/`-Warith-conversion`
  in external header.

Closes #1257
This commit is contained in:
Viktor Szakats
2023-11-30 23:35:11 +00:00
parent e0a0466490
commit afa6b86560
43 changed files with 299 additions and 208 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
acinclude.m4
View File

@ -268,7 +268,8 @@ AC_DEFUN([CURL_CC_DEBUG_OPTS],
# #
dnl Only clang 2.9 or later dnl Only clang 2.9 or later
if test "$compiler_num" -ge "209"; then if test "$compiler_num" -ge "209"; then
tmp_CFLAGS="$tmp_CFLAGS -Wno-sign-conversion" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-conversion])
tmp_CFLAGS="$tmp_CFLAGS -Wno-error=sign-conversion"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-sign-overflow]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-sign-overflow])
# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [padded]) # Not used because we cannot change public structs # CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [padded]) # Not used because we cannot change public structs
fi fi
@ -276,6 +277,7 @@ AC_DEFUN([CURL_CC_DEBUG_OPTS],
dnl Only clang 3.0 or later dnl Only clang 3.0 or later
if test "$compiler_num" -ge "300"; then if test "$compiler_num" -ge "300"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [language-extension-token]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [language-extension-token])
tmp_CFLAGS="$tmp_CFLAGS -Wformat=2"
fi fi
# #
dnl Only clang 3.2 or later dnl Only clang 3.2 or later
@ -324,6 +326,10 @@ AC_DEFUN([CURL_CC_DEBUG_OPTS],
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [assign-enum]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [assign-enum])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [extra-semi-stmt]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [extra-semi-stmt])
fi fi
dnl clang 10 or later
if test "$compiler_num" -ge "1000"; then
tmp_CFLAGS="$tmp_CFLAGS -Wimplicit-fallthrough" # we have silencing markup for clang 10.0 and above only
fi
CFLAGS="$CFLAGS $tmp_CFLAGS" CFLAGS="$CFLAGS $tmp_CFLAGS"
@ -451,8 +457,9 @@ AC_DEFUN([CURL_CC_DEBUG_OPTS],
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits old-style-declaration]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits old-style-declaration])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-parameter-type empty-body]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-parameter-type empty-body])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [clobbered ignored-qualifiers]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [clobbered ignored-qualifiers])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion trampolines])
tmp_CFLAGS="$tmp_CFLAGS -Wno-sign-conversion" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-conversion])
tmp_CFLAGS="$tmp_CFLAGS -Wno-error=sign-conversion"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla])
dnl required for -Warray-bounds, included in -Wall dnl required for -Warray-bounds, included in -Wall
tmp_CFLAGS="$tmp_CFLAGS -ftree-vrp" tmp_CFLAGS="$tmp_CFLAGS -ftree-vrp"
@ -500,6 +507,7 @@ AC_DEFUN([CURL_CC_DEBUG_OPTS],
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [alloc-zero]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [alloc-zero])
tmp_CFLAGS="$tmp_CFLAGS -Wformat-overflow=2" tmp_CFLAGS="$tmp_CFLAGS -Wformat-overflow=2"
tmp_CFLAGS="$tmp_CFLAGS -Wformat-truncation=2" tmp_CFLAGS="$tmp_CFLAGS -Wformat-truncation=2"
tmp_CFLAGS="$tmp_CFLAGS -Wimplicit-fallthrough"
fi fi
# #
dnl Only gcc 10 or later dnl Only gcc 10 or later

14
cmake/PickyWarnings.cmake
View File

@ -98,11 +98,12 @@ elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_C_COMPILER_I
-Wmissing-field-initializers # clang 2.7 gcc 4.1 -Wmissing-field-initializers # clang 2.7 gcc 4.1
-Wmissing-noreturn # clang 2.7 gcc 4.1 -Wmissing-noreturn # clang 2.7 gcc 4.1
-Wno-format-nonliteral # clang 1.0 gcc 2.96 (3.0) -Wno-format-nonliteral # clang 1.0 gcc 2.96 (3.0)
-Wno-sign-conversion # clang 2.9 gcc 4.3
-Wno-system-headers # clang 1.0 gcc 3.0 -Wno-system-headers # clang 1.0 gcc 3.0
# -Wpadded # clang 2.9 gcc 4.1 # Not used because we cannot change public structs # -Wpadded # clang 2.9 gcc 4.1 # Not used because we cannot change public structs
-Wold-style-definition # clang 2.7 gcc 3.4 -Wold-style-definition # clang 2.7 gcc 3.4
-Wredundant-decls # clang 2.7 gcc 4.1 -Wredundant-decls # clang 2.7 gcc 4.1
-Wsign-conversion # clang 2.9 gcc 4.3
-Wno-error=sign-conversion
-Wstrict-prototypes # clang 1.0 gcc 3.3 -Wstrict-prototypes # clang 1.0 gcc 3.3
# -Wswitch-enum # clang 2.7 gcc 4.1 # Not used because this basically disallows default case # -Wswitch-enum # clang 2.7 gcc 4.1 # Not used because this basically disallows default case
-Wtype-limits # clang 2.7 gcc 4.3 -Wtype-limits # clang 2.7 gcc 4.3
@ -125,6 +126,7 @@ elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_C_COMPILER_I
-Wshift-sign-overflow # clang 2.9 -Wshift-sign-overflow # clang 2.9
-Wshorten-64-to-32 # clang 1.0 -Wshorten-64-to-32 # clang 1.0
-Wlanguage-extension-token # clang 3.0 -Wlanguage-extension-token # clang 3.0
-Wformat=2 # clang 3.0 gcc 4.8
) )
# Enable based on compiler version # Enable based on compiler version
if((CMAKE_C_COMPILER_ID STREQUAL "Clang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.6) OR if((CMAKE_C_COMPILER_ID STREQUAL "Clang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.6) OR
@ -150,6 +152,12 @@ elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_C_COMPILER_I
-Wextra-semi-stmt # clang 7.0 appleclang 10.3 -Wextra-semi-stmt # clang 7.0 appleclang 10.3
) )
endif() endif()
if((CMAKE_C_COMPILER_ID STREQUAL "Clang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 10.0) OR
(CMAKE_C_COMPILER_ID STREQUAL "AppleClang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 12.4))
list(APPEND WPICKY_ENABLE
-Wimplicit-fallthrough # clang 4.0 gcc 7.0 appleclang 12.4 # we have silencing markup for clang 10.0 and above only
)
endif()
else() # gcc else() # gcc
list(APPEND WPICKY_DETECT list(APPEND WPICKY_DETECT
${WPICKY_COMMON} ${WPICKY_COMMON}
@ -162,6 +170,7 @@ elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_C_COMPILER_I
-Wmissing-parameter-type # gcc 4.3 -Wmissing-parameter-type # gcc 4.3
-Wold-style-declaration # gcc 4.3 -Wold-style-declaration # gcc 4.3
-Wstrict-aliasing=3 # gcc 4.0 -Wstrict-aliasing=3 # gcc 4.0
-Wtrampolines # gcc 4.3
) )
endif() endif()
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5 AND MINGW) if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5 AND MINGW)
@ -171,7 +180,7 @@ elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_C_COMPILER_I
endif() endif()
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.8) if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.8)
list(APPEND WPICKY_ENABLE list(APPEND WPICKY_ENABLE
-Wformat=2 # clang 3.0 gcc 4.8 (clang part-default, enabling it fully causes -Wformat-nonliteral warnings) -Wformat=2 # clang 3.0 gcc 4.8
) )
endif() endif()
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0) if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0)
@ -194,6 +203,7 @@ elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_C_COMPILER_I
-Wduplicated-branches # gcc 7.0 -Wduplicated-branches # gcc 7.0
-Wformat-overflow=2 # gcc 7.0 -Wformat-overflow=2 # gcc 7.0
-Wformat-truncation=2 # gcc 7.0 -Wformat-truncation=2 # gcc 7.0
-Wimplicit-fallthrough # clang 4.0 gcc 7.0
-Wrestrict # gcc 7.0 -Wrestrict # gcc 7.0
) )
endif() endif()

2
docs/TODO
View File

@ -1,6 +1,8 @@
Things TODO Things TODO
=========== ===========
* Fix -Wsign-conversion warnings in src
* Fix the numerous malloc+copy operations for sending data, see "Buffering * Fix the numerous malloc+copy operations for sending data, see "Buffering
Improvements" below for details Improvements" below for details

12
example/direct_tcpip.c
View File

@ -41,10 +41,10 @@ static const char *password = "";
static const char *server_ip = "127.0.0.1"; static const char *server_ip = "127.0.0.1";
static const char *local_listenip = "127.0.0.1"; static const char *local_listenip = "127.0.0.1";
static unsigned int local_listenport = 2222; static int local_listenport = 2222;
static const char *remote_desthost = "localhost"; /* resolved by the server */ static const char *remote_desthost = "localhost"; /* resolved by the server */
static unsigned int remote_destport = 22; static int remote_destport = 22;
enum { enum {
AUTH_NONE = 0, AUTH_NONE = 0,
@ -63,7 +63,7 @@ int main(int argc, char *argv[])
LIBSSH2_SESSION *session = NULL; LIBSSH2_SESSION *session = NULL;
LIBSSH2_CHANNEL *channel = NULL; LIBSSH2_CHANNEL *channel = NULL;
const char *shost; const char *shost;
unsigned int sport; int sport;
fd_set fds; fd_set fds;
struct timeval tv; struct timeval tv;
ssize_t len, wr; ssize_t len, wr;
@ -270,7 +270,8 @@ int main(int argc, char *argv[])
wr = 0; wr = 0;
while(wr < len) { while(wr < len) {
ssize_t nwritten = libssh2_channel_write(channel, ssize_t nwritten = libssh2_channel_write(channel,
buf + wr, len - wr); buf + wr,
(size_t)(len - wr));
if(nwritten == LIBSSH2_ERROR_EAGAIN) { if(nwritten == LIBSSH2_ERROR_EAGAIN) {
continue; continue;
} }
@ -292,7 +293,8 @@ int main(int argc, char *argv[])
} }
wr = 0; wr = 0;
while(wr < len) { while(wr < len) {
ssize_t nsent = send(forwardsock, buf + wr, len - wr, 0); ssize_t nsent = send(forwardsock, buf + wr,
(size_t)(len - wr), 0);
if(nsent <= 0) { if(nsent <= 0) {
fprintf(stderr, "failed to send().\n"); fprintf(stderr, "failed to send().\n");
goto shutdown; goto shutdown;

4
example/scp.c
View File

@ -158,9 +158,9 @@ int main(int argc, char *argv[])
amount = (int)(fileinfo.st_size - got); amount = (int)(fileinfo.st_size - got);
} }
nread = libssh2_channel_read(channel, mem, amount); nread = libssh2_channel_read(channel, mem, (size_t)amount);
if(nread > 0) { if(nread > 0) {
write(1, mem, nread); write(1, mem, (size_t)nread);
} }
else if(nread < 0) { else if(nread < 0) {
fprintf(stderr, "libssh2_channel_read() failed: %d\n", fprintf(stderr, "libssh2_channel_read() failed: %d\n",

4
example/scp_nonblock.c
View File

@ -243,9 +243,9 @@ int main(int argc, char *argv[])
} }
/* loop until we block */ /* loop until we block */
nread = libssh2_channel_read(channel, mem, amount); nread = libssh2_channel_read(channel, mem, (size_t)amount);
if(nread > 0) { if(nread > 0) {
write(1, mem, nread); write(1, mem, (size_t)nread);
got += nread; got += nread;
total += nread; total += nread;
} }

2
example/scp_write.c
View File

@ -184,7 +184,7 @@ int main(int argc, char *argv[])
else { else {
/* nwritten indicates how many bytes were written this time */ /* nwritten indicates how many bytes were written this time */
ptr += nwritten; ptr += nwritten;
nread -= nwritten; nread -= (size_t)nwritten;
} }
} while(nread); } while(nread);

4
example/scp_write_nonblock.c
View File

@ -219,7 +219,7 @@ int main(int argc, char *argv[])
} }
ptr = mem; ptr = mem;
total += nread; total += (libssh2_struct_stat_size)nread;
prev = 0; prev = 0;
do { do {
@ -238,8 +238,8 @@ int main(int argc, char *argv[])
prev = nread; prev = nread;
/* nwritten indicates how many bytes were written this time */ /* nwritten indicates how many bytes were written this time */
nread -= nwritten;
ptr += nwritten; ptr += nwritten;
nread -= (size_t)nwritten;
} }
} while(nread); } while(nread);
} while(!nread); /* only continue if nread was drained */ } while(!nread); /* only continue if nread was drained */

6
example/sftp.c
View File

@ -55,11 +55,11 @@ static void kbd_callback(const char *name, int name_len,
fprintf(stderr, "Performing keyboard-interactive authentication.\n"); fprintf(stderr, "Performing keyboard-interactive authentication.\n");
fprintf(stderr, "Authentication name: '"); fprintf(stderr, "Authentication name: '");
fwrite(name, 1, name_len, stderr); fwrite(name, 1, (size_t)name_len, stderr);
fprintf(stderr, "'\n"); fprintf(stderr, "'\n");
fprintf(stderr, "Authentication instruction: '"); fprintf(stderr, "Authentication instruction: '");
fwrite(instruction, 1, instruction_len, stderr); fwrite(instruction, 1, (size_t)instruction_len, stderr);
fprintf(stderr, "'\n"); fprintf(stderr, "'\n");
fprintf(stderr, "Number of prompts: %d\n\n", num_prompts); fprintf(stderr, "Number of prompts: %d\n\n", num_prompts);
@ -275,7 +275,7 @@ int main(int argc, char *argv[])
fprintf(stderr, "libssh2_sftp_read().\n"); fprintf(stderr, "libssh2_sftp_read().\n");
nread = libssh2_sftp_read(sftp_handle, mem, sizeof(mem)); nread = libssh2_sftp_read(sftp_handle, mem, sizeof(mem));
if(nread > 0) { if(nread > 0) {
write(1, mem, nread); write(1, mem, (size_t)nread);
} }
else { else {
break; break;

8
example/sftp_RW_nonblock.c
View File

@ -232,9 +232,9 @@ int main(int argc, char *argv[])
if(nread > 0) { if(nread > 0) {
/* write to stderr */ /* write to stderr */
write(2, mem, nread); write(2, mem, (size_t)nread);
/* write to temporary storage area */ /* write to temporary storage area */
fwrite(mem, nread, 1, tempstorage); fwrite(mem, (size_t)nread, 1, tempstorage);
} }
} while(nread > 0); } while(nread > 0);
@ -297,8 +297,10 @@ int main(int argc, char *argv[])
/* write data in a loop until we block */ /* write data in a loop until we block */
nwritten = libssh2_sftp_write(sftp_handle, ptr, nwritten = libssh2_sftp_write(sftp_handle, ptr,
nread); nread);
if(nwritten < 0)
break;
ptr += nwritten; ptr += nwritten;
nread -= nwritten; nread -= (size_t)nwritten;
} while(nwritten >= 0); } while(nwritten >= 0);
if(nwritten != LIBSSH2_ERROR_EAGAIN) { if(nwritten != LIBSSH2_ERROR_EAGAIN) {

2
example/sftp_append.c
View File

@ -214,7 +214,7 @@ int main(int argc, char *argv[])
if(nwritten < 0) if(nwritten < 0)
break; break;
ptr += nwritten; ptr += nwritten;
nread -= nwritten; nread -= (size_t)nwritten;
} while(nread); } while(nread);
} while(nwritten > 0); } while(nwritten > 0);

2
example/sftp_nonblock.c
View File

@ -257,7 +257,7 @@ int main(int argc, char *argv[])
} }
if(nread > 0) { if(nread > 0) {
total += nread; total += nread;
write(1, mem, nread); write(1, mem, (size_t)nread);
} }
else { else {
break; break;

2
example/sftp_write.c
View File

@ -199,7 +199,7 @@ int main(int argc, char *argv[])
if(nwritten < 0) if(nwritten < 0)
break; break;
ptr += nwritten; ptr += nwritten;
nread -= nwritten; nread -= (size_t)nwritten;
} while(nread); } while(nread);
} while(nwritten > 0); } while(nwritten > 0);

4
example/sftp_write_nonblock.c
View File

@ -239,7 +239,7 @@ int main(int argc, char *argv[])
} }
ptr = mem; ptr = mem;
total += nread; total += (libssh2_struct_stat_size)nread;
do { do {
/* write data in a loop until we block */ /* write data in a loop until we block */
@ -250,7 +250,7 @@ int main(int argc, char *argv[])
if(nwritten < 0) if(nwritten < 0)
break; break;
ptr += nwritten; ptr += nwritten;
nread -= nwritten; nread -= (size_t)nwritten;
} while(nread); } while(nread);
} while(nwritten > 0); } while(nwritten > 0);

8
example/sftp_write_sliding.c
View File

@ -244,7 +244,7 @@ int main(int argc, char *argv[])
break; break;
} }
memuse += nread; memuse += nread;
total += nread; total += (libssh2_struct_stat_size)nread;
/* write data in a loop until we block */ /* write data in a loop until we block */
while((nwritten = libssh2_sftp_write(sftp_handle, mem, memuse)) == while((nwritten = libssh2_sftp_write(sftp_handle, mem, memuse)) ==
@ -254,10 +254,10 @@ int main(int argc, char *argv[])
if(nwritten < 0) if(nwritten < 0)
break; break;
if(memuse - nwritten) { if(memuse - (size_t)nwritten) {
/* make room for more data at the end of the buffer */ /* make room for more data at the end of the buffer */
memmove(&mem[0], &mem[nwritten], memuse - nwritten); memmove(&mem[0], &mem[nwritten], memuse - (size_t)nwritten);
memuse -= nwritten; memuse -= (size_t)nwritten;
} }
else else
/* 'mem' was consumed fully */ /* 'mem' was consumed fully */

2
example/ssh2.c
View File

@ -319,7 +319,7 @@ int main(int argc, char *argv[])
if(err < 0) if(err < 0)
fprintf(stderr, "Unable to read response: %d\n", (int)err); fprintf(stderr, "Unable to read response: %d\n", (int)err);
else { else {
fwrite(buf, 1, err, stdout); fwrite(buf, 1, (size_t)err, stdout);
} }
} }
} }

21
example/ssh2_echo.c
View File

@ -219,11 +219,11 @@ int main(int argc, char *argv[])
else { else {
LIBSSH2_POLLFD *fds = NULL; LIBSSH2_POLLFD *fds = NULL;
int running = 1; int running = 1;
ssize_t bufsize = BUFSIZE; size_t bufsize = BUFSIZE;
char buffer[BUFSIZE]; char buffer[BUFSIZE];
ssize_t totsize = 1500000; size_t totsize = 1500000;
ssize_t totwritten = 0; size_t totwritten = 0;
ssize_t totread = 0; size_t totread = 0;
int rereads = 0; int rereads = 0;
int rewrites = 0; int rewrites = 0;
int i; int i;
@ -262,7 +262,7 @@ int main(int argc, char *argv[])
exit(1); exit(1);
} }
else { else {
totread += n; totread += (size_t)n;
fprintf(stderr, "read %d bytes (%d in total)\n", fprintf(stderr, "read %d bytes (%d in total)\n",
(int)n, (int)totread); (int)n, (int)totread);
} }
@ -273,8 +273,8 @@ int main(int argc, char *argv[])
if(totwritten < totsize) { if(totwritten < totsize) {
/* we have not written all data yet */ /* we have not written all data yet */
ssize_t left = totsize - totwritten; size_t left = totsize - totwritten;
ssize_t size = (left < bufsize) ? left : bufsize; size_t size = (left < bufsize) ? left : bufsize;
ssize_t n = libssh2_channel_write_ex(channel, 0, ssize_t n = libssh2_channel_write_ex(channel, 0,
buffer, size); buffer, size);
@ -287,10 +287,10 @@ int main(int argc, char *argv[])
exit(1); exit(1);
} }
else { else {
totwritten += n; totwritten += (size_t)n;
fprintf(stderr, "wrote %d bytes (%d in total)", fprintf(stderr, "wrote %d bytes (%d in total)",
(int)n, (int)totwritten); (int)n, (int)totwritten);
if(left >= bufsize && n != bufsize) { if(left >= bufsize && (size_t)n != bufsize) {
fprintf(stderr, " PARTIAL"); fprintf(stderr, " PARTIAL");
} }
fprintf(stderr, "\n"); fprintf(stderr, "\n");
@ -310,7 +310,8 @@ int main(int argc, char *argv[])
else { else {
fprintf(stderr, "sent eof\n"); fprintf(stderr, "sent eof\n");
/* we're done writing, stop listening for OUT events */ /* we're done writing, stop listening for OUT events */
fds[0].events &= ~LIBSSH2_POLLFD_POLLOUT; fds[0].events &=
~(unsigned long)LIBSSH2_POLLFD_POLLOUT;
} }
} }
} }

14
example/subsystem_netconf.c
View File

@ -73,7 +73,7 @@ static ssize_t netconf_read_until(LIBSSH2_CHANNEL *channel, const char *endtag,
fprintf(stderr, "libssh2_channel_read: %d\n", (int)len); fprintf(stderr, "libssh2_channel_read: %d\n", (int)len);
return -1; return -1;
} }
rd += len; rd += (size_t)len;
/* read more data until we see a rpc-reply closing tag followed by /* read more data until we see a rpc-reply closing tag followed by
* the special sequence ]]>]]> */ * the special sequence ]]>]]> */
@ -93,10 +93,10 @@ static ssize_t netconf_read_until(LIBSSH2_CHANNEL *channel, const char *endtag,
} }
/* discard the special sequence so that only XML is returned */ /* discard the special sequence so that only XML is returned */
rd = specialsequence - buf; rd = (size_t)(specialsequence - buf);
buf[rd] = 0; buf[rd] = 0;
return rd; return (ssize_t)rd;
} }
int main(int argc, char *argv[]) int main(int argc, char *argv[])
@ -250,7 +250,9 @@ int main(int argc, char *argv[])
"</capabilities>" "</capabilities>"
"</hello>\n" "</hello>\n"
"]]>]]>\n"); "]]>]]>\n");
if(-1 == netconf_write(channel, buf, len)) if(len < 0)
goto shutdown;
if(-1 == netconf_write(channel, buf, (size_t)len))
goto shutdown; goto shutdown;
fprintf(stderr, "Reading NETCONF server <hello>\n"); fprintf(stderr, "Reading NETCONF server <hello>\n");
@ -268,7 +270,9 @@ int main(int argc, char *argv[])
"<get-interface-information><terse/></get-interface-information>" "<get-interface-information><terse/></get-interface-information>"
"</rpc>\n" "</rpc>\n"
"]]>]]>\n"); "]]>]]>\n");
if(-1 == netconf_write(channel, buf, len)) if(len < 0)
goto shutdown;
if(-1 == netconf_write(channel, buf, (size_t)len))
goto shutdown; goto shutdown;
fprintf(stderr, "Reading NETCONF <rpc-reply>\n"); fprintf(stderr, "Reading NETCONF <rpc-reply>\n");

4
example/tcpip-forward.c
View File

@ -268,7 +268,7 @@ int main(int argc, char *argv[])
} }
wr = 0; wr = 0;
do { do {
nwritten = libssh2_channel_write(channel, buf, len); nwritten = libssh2_channel_write(channel, buf, (size_t)len);
if(nwritten < 0) { if(nwritten < 0) {
fprintf(stderr, "libssh2_channel_write: %d\n", fprintf(stderr, "libssh2_channel_write: %d\n",
(int)nwritten); (int)nwritten);
@ -289,7 +289,7 @@ int main(int argc, char *argv[])
} }
wr = 0; wr = 0;
while(wr < len) { while(wr < len) {
nsent = send(forwardsock, buf + wr, len - wr, 0); nsent = send(forwardsock, buf + wr, (size_t)(len - wr), 0);
if(nsent <= 0) { if(nsent <= 0) {
fprintf(stderr, "failed to send().\n"); fprintf(stderr, "failed to send().\n");
goto shutdown; goto shutdown;

20
example/x11.c
View File

@ -94,10 +94,11 @@ static int _raw_mode(void)
if(rc != -1) { if(rc != -1) {
_saved_tio = tio; _saved_tio = tio;
/* do the equivalent of cfmakeraw() manually, to build on Solaris */ /* do the equivalent of cfmakeraw() manually, to build on Solaris */
tio.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); tio.c_iflag &= ~(tcflag_t)(IGNBRK|BRKINT|PARMRK|ISTRIP|
tio.c_oflag &= ~OPOST; INLCR|IGNCR|ICRNL|IXON);
tio.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); tio.c_oflag &= ~(tcflag_t)OPOST;
tio.c_cflag &= ~(CSIZE|PARENB); tio.c_lflag &= ~(tcflag_t)(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
tio.c_cflag &= ~(tcflag_t)(CSIZE|PARENB);
tio.c_cflag |= CS8; tio.c_cflag |= CS8;
rc = tcsetattr(fileno(stdin), TCSADRAIN, &tio); rc = tcsetattr(fileno(stdin), TCSADRAIN, &tio);
} }
@ -199,9 +200,9 @@ static void x11_callback(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel,
static int x11_send_receive(LIBSSH2_CHANNEL *channel, int sock) static int x11_send_receive(LIBSSH2_CHANNEL *channel, int sock)
{ {
char *buf; char *buf;
int bufsize = 8192; unsigned int bufsize = 8192;
int rc; int rc;
int nfds = 1; unsigned int nfds = 1;
LIBSSH2_POLLFD *fds = NULL; LIBSSH2_POLLFD *fds = NULL;
fd_set set; fd_set set;
struct timeval timeval_out; struct timeval timeval_out;
@ -230,7 +231,8 @@ static int x11_send_receive(LIBSSH2_CHANNEL *channel, int sock)
if(rc > 0) { if(rc > 0) {
ssize_t nread; ssize_t nread;
nread = libssh2_channel_read(channel, buf, bufsize); nread = libssh2_channel_read(channel, buf, bufsize);
write(sock, buf, nread); if(nread > 0)
write(sock, buf, (size_t)nread);
} }
rc = select((int)(sock + 1), &set, NULL, NULL, &timeval_out); rc = select((int)(sock + 1), &set, NULL, NULL, &timeval_out);
@ -242,7 +244,7 @@ static int x11_send_receive(LIBSSH2_CHANNEL *channel, int sock)
/* Data in sock */ /* Data in sock */
nread = read(sock, buf, bufsize); nread = read(sock, buf, bufsize);
if(nread > 0) { if(nread > 0) {
libssh2_channel_write(channel, buf, nread); libssh2_channel_write(channel, buf, (size_t)nread);
} }
else { else {
free(buf); free(buf);
@ -274,7 +276,7 @@ int main(int argc, char *argv[])
size_t bufsiz = 8193; size_t bufsiz = 8193;
char *buf = NULL; char *buf = NULL;
int set_debug_on = 0; int set_debug_on = 0;
int nfds = 1; unsigned int nfds = 1;
LIBSSH2_POLLFD *fds = NULL; LIBSSH2_POLLFD *fds = NULL;
/* Chan List struct */ /* Chan List struct */

1
include/libssh2.h
View File

@ -279,6 +279,7 @@ typedef struct _LIBSSH2_SK_SIG_INFO {
const unsigned char *data, size_t data_len, void **abstract) const unsigned char *data, size_t data_len, void **abstract)
/* 'keyboard-interactive' authentication callback */ /* 'keyboard-interactive' authentication callback */
/* FIXME: name_len, instruction_len -> size_t, num_prompts -> unsigned int? */
#define LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(name_) \ #define LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(name_) \
void name_(const char *name, int name_len, const char *instruction, \ void name_(const char *name, int name_len, const char *instruction, \
int instruction_len, int num_prompts, \ int instruction_len, int num_prompts, \

2
src/agent.c
View File

@ -563,7 +563,7 @@ agent_sign(LIBSSH2_SESSION *session, unsigned char **sig, size_t *sig_len,
_libssh2_debug((session, _libssh2_debug((session,
LIBSSH2_TRACE_KEX, LIBSSH2_TRACE_KEX,
"Agent sign method %.*s", "Agent sign method %.*s",
method_len, method_name)); (int)method_len, method_name));
rc = LIBSSH2_ERROR_ALGO_UNSUPPORTED; rc = LIBSSH2_ERROR_ALGO_UNSUPPORTED;
goto error; goto error;

62
src/channel.c
View File

@ -84,7 +84,7 @@ _libssh2_channel_nextid(LIBSSH2_SESSION * session)
*/ */
session->next_channel = id + 1; session->next_channel = id + 1;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Allocated new channel ID#%lu", id)); "Allocated new channel ID#%u", id));
return id; return id;
} }
@ -265,8 +265,8 @@ _libssh2_channel_open(LIBSSH2_SESSION * session, const char *channel_type,
session->open_channel->local.packet_size = session->open_channel->local.packet_size =
_libssh2_ntohu32(session->open_data + 13); _libssh2_ntohu32(session->open_data + 13);
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Connection Established - ID: %lu/%lu win: %lu/%lu" "Connection Established - ID: %u/%u win: %u/%u"
" pack: %lu/%lu", " pack: %u/%u",
session->open_channel->local.id, session->open_channel->local.id,
session->open_channel->remote.id, session->open_channel->remote.id,
session->open_channel->local.window_size, session->open_channel->local.window_size,
@ -902,7 +902,7 @@ static int channel_setenv(LIBSSH2_CHANNEL *channel,
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Setting remote environment variable: %s=%s on " "Setting remote environment variable: %s=%s on "
"channel %lu/%lu", "channel %u/%u",
varname, value, channel->local.id, channel->remote.id)); varname, value, channel->local.id, channel->remote.id));
s = channel->setenv_packet = s = channel->setenv_packet =
@ -1036,7 +1036,7 @@ static int channel_request_pty(LIBSSH2_CHANNEL *channel,
sizeof(channel->reqPTY_packet_requirev_state)); sizeof(channel->reqPTY_packet_requirev_state));
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Allocating tty on channel %lu/%lu", channel->local.id, "Allocating tty on channel %u/%u", channel->local.id,
channel->remote.id)); channel->remote.id));
s = channel->reqPTY_packet; s = channel->reqPTY_packet;
@ -1139,7 +1139,7 @@ static int channel_request_auth_agent(LIBSSH2_CHANNEL *channel,
sizeof(channel->req_auth_agent_requirev_state)); sizeof(channel->req_auth_agent_requirev_state));
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Requesting auth agent on channel %lu/%lu", "Requesting auth agent on channel %u/%u",
channel->local.id, channel->remote.id)); channel->local.id, channel->remote.id));
/* /*
@ -1303,7 +1303,7 @@ channel_request_pty_size(LIBSSH2_CHANNEL * channel, int width,
sizeof(channel->reqPTY_packet_requirev_state)); sizeof(channel->reqPTY_packet_requirev_state));
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"changing tty size on channel %lu/%lu", "changing tty size on channel %u/%u",
channel->local.id, channel->local.id,
channel->remote.id)); channel->remote.id));
@ -1392,7 +1392,7 @@ channel_x11_req(LIBSSH2_CHANNEL *channel, int single_connection,
sizeof(channel->reqX11_packet_requirev_state)); sizeof(channel->reqX11_packet_requirev_state));
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Requesting x11-req for channel %lu/%lu: single=%d " "Requesting x11-req for channel %u/%u: single=%d "
"proto=%s cookie=%s screen=%d", "proto=%s cookie=%s screen=%d",
channel->local.id, channel->remote.id, channel->local.id, channel->remote.id,
single_connection, single_connection,
@ -1550,7 +1550,7 @@ _libssh2_channel_process_startup(LIBSSH2_CHANNEL *channel,
channel->process_packet_len += + 4; channel->process_packet_len += + 4;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"starting request(%s) on channel %lu/%lu, message=%s", "starting request(%s) on channel %u/%u, message=%s",
request, channel->local.id, channel->remote.id, request, channel->local.id, channel->remote.id,
message ? message : "<null>")); message ? message : "<null>"));
s = channel->process_packet = s = channel->process_packet =
@ -1719,9 +1719,9 @@ _libssh2_channel_flush(LIBSSH2_CHANNEL *channel, int streamid)
packet->data_head; packet->data_head;
_libssh2_debug((channel->session, LIBSSH2_TRACE_CONN, _libssh2_debug((channel->session, LIBSSH2_TRACE_CONN,
"Flushing %d bytes of data from stream " "Flushing %ld bytes of data from stream "
"%lu on channel %lu/%lu", "%d on channel %u/%u",
bytes_to_flush, packet_stream_id, (long)bytes_to_flush, packet_stream_id,
channel->local.id, channel->remote.id)); channel->local.id, channel->remote.id));
/* It's one of the streams we wanted to flush */ /* It's one of the streams we wanted to flush */
@ -1882,8 +1882,8 @@ _libssh2_channel_receive_window_adjust(LIBSSH2_CHANNEL * channel,
&& (adjustment + channel->adjust_queue < && (adjustment + channel->adjust_queue <
LIBSSH2_CHANNEL_MINADJUST)) { LIBSSH2_CHANNEL_MINADJUST)) {
_libssh2_debug((channel->session, LIBSSH2_TRACE_CONN, _libssh2_debug((channel->session, LIBSSH2_TRACE_CONN,
"Queueing %lu bytes for receive window adjustment " "Queueing %u bytes for receive window adjustment "
"for channel %lu/%lu", "for channel %u/%u",
adjustment, channel->local.id, channel->remote.id)); adjustment, channel->local.id, channel->remote.id));
channel->adjust_queue += adjustment; channel->adjust_queue += adjustment;
return 0; return 0;
@ -1901,8 +1901,8 @@ _libssh2_channel_receive_window_adjust(LIBSSH2_CHANNEL * channel,
_libssh2_htonu32(&channel->adjust_adjust[1], channel->remote.id); _libssh2_htonu32(&channel->adjust_adjust[1], channel->remote.id);
_libssh2_htonu32(&channel->adjust_adjust[5], adjustment); _libssh2_htonu32(&channel->adjust_adjust[5], adjustment);
_libssh2_debug((channel->session, LIBSSH2_TRACE_CONN, _libssh2_debug((channel->session, LIBSSH2_TRACE_CONN,
"Adjusting window %lu bytes for data on " "Adjusting window %u bytes for data on "
"channel %lu/%lu", "channel %u/%u",
adjustment, channel->local.id, channel->remote.id)); adjustment, channel->local.id, channel->remote.id));
channel->adjust_state = libssh2_NB_state_created; channel->adjust_state = libssh2_NB_state_created;
@ -1998,7 +1998,7 @@ _libssh2_channel_extended_data(LIBSSH2_CHANNEL *channel, int ignore_mode)
{ {
if(channel->extData2_state == libssh2_NB_state_idle) { if(channel->extData2_state == libssh2_NB_state_idle) {
_libssh2_debug((channel->session, LIBSSH2_TRACE_CONN, _libssh2_debug((channel->session, LIBSSH2_TRACE_CONN,
"Setting channel %lu/%lu handle_extended_data" "Setting channel %u/%u handle_extended_data"
" mode to %d", " mode to %d",
channel->local.id, channel->remote.id, ignore_mode)); channel->local.id, channel->remote.id, ignore_mode));
channel->remote.extended_data_ignore_mode = (char)ignore_mode; channel->remote.extended_data_ignore_mode = (char)ignore_mode;
@ -2081,7 +2081,7 @@ ssize_t _libssh2_channel_read(LIBSSH2_CHANNEL *channel, int stream_id,
LIBSSH2_PACKET *read_next; LIBSSH2_PACKET *read_next;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"channel_read() wants %d bytes from channel %lu/%lu " "channel_read() wants %d bytes from channel %u/%u "
"stream #%d", "stream #%d",
(int) buflen, channel->local.id, channel->remote.id, (int) buflen, channel->local.id, channel->remote.id,
stream_id)); stream_id));
@ -2178,8 +2178,8 @@ ssize_t _libssh2_channel_read(LIBSSH2_CHANNEL *channel, int stream_id,
} }
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"channel_read() got %d of data from %lu/%lu/%d%s", "channel_read() got %ld of data from %u/%u/%d%s",
bytes_want, channel->local.id, (long)bytes_want, channel->local.id,
channel->remote.id, stream_id, channel->remote.id, stream_id,
unlink_packet?" [ul]":"")); unlink_packet?" [ul]":""));
@ -2356,7 +2356,7 @@ _libssh2_channel_write(LIBSSH2_CHANNEL *channel, int stream_id,
unsigned char *s = channel->write_packet; unsigned char *s = channel->write_packet;
_libssh2_debug((channel->session, LIBSSH2_TRACE_CONN, _libssh2_debug((channel->session, LIBSSH2_TRACE_CONN,
"Writing %d bytes on channel %lu/%lu, stream #%d", "Writing %d bytes on channel %u/%u, stream #%d",
(int) buflen, channel->local.id, channel->remote.id, (int) buflen, channel->local.id, channel->remote.id,
stream_id)); stream_id));
@ -2405,16 +2405,16 @@ _libssh2_channel_write(LIBSSH2_CHANNEL *channel, int stream_id,
/* REMEMBER local means local as the SOURCE of the data */ /* REMEMBER local means local as the SOURCE of the data */
if(channel->write_bufwrite > channel->local.window_size) { if(channel->write_bufwrite > channel->local.window_size) {
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Splitting write block due to %lu byte " "Splitting write block due to %u byte "
"window_size on %lu/%lu/%d", "window_size on %u/%u/%d",
channel->local.window_size, channel->local.id, channel->local.window_size, channel->local.id,
channel->remote.id, stream_id)); channel->remote.id, stream_id));
channel->write_bufwrite = channel->local.window_size; channel->write_bufwrite = channel->local.window_size;
} }
if(channel->write_bufwrite > channel->local.packet_size) { if(channel->write_bufwrite > channel->local.packet_size) {
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Splitting write block due to %lu byte " "Splitting write block due to %u byte "
"packet_size on %lu/%lu/%d", "packet_size on %u/%u/%d",
channel->local.packet_size, channel->local.id, channel->local.packet_size, channel->local.id,
channel->remote.id, stream_id)); channel->remote.id, stream_id));
channel->write_bufwrite = channel->local.packet_size; channel->write_bufwrite = channel->local.packet_size;
@ -2425,7 +2425,7 @@ _libssh2_channel_write(LIBSSH2_CHANNEL *channel, int stream_id,
channel->write_packet_len = s - channel->write_packet; channel->write_packet_len = s - channel->write_packet;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Sending %d bytes on channel %lu/%lu, stream_id=%d", "Sending %d bytes on channel %u/%u, stream_id=%d",
(int) channel->write_bufwrite, channel->local.id, (int) channel->write_bufwrite, channel->local.id,
channel->remote.id, stream_id)); channel->remote.id, stream_id));
@ -2500,7 +2500,7 @@ static int channel_send_eof(LIBSSH2_CHANNEL *channel)
int rc; int rc;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Sending EOF on channel %lu/%lu", "Sending EOF on channel %u/%u",
channel->local.id, channel->remote.id)); channel->local.id, channel->remote.id));
packet[0] = SSH_MSG_CHANNEL_EOF; packet[0] = SSH_MSG_CHANNEL_EOF;
_libssh2_htonu32(packet + 1, channel->remote.id); _libssh2_htonu32(packet + 1, channel->remote.id);
@ -2590,7 +2590,7 @@ static int channel_wait_eof(LIBSSH2_CHANNEL *channel)
if(channel->wait_eof_state == libssh2_NB_state_idle) { if(channel->wait_eof_state == libssh2_NB_state_idle) {
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Awaiting EOF for channel %lu/%lu", channel->local.id, "Awaiting EOF for channel %u/%u", channel->local.id,
channel->remote.id)); channel->remote.id));
channel->wait_eof_state = libssh2_NB_state_created; channel->wait_eof_state = libssh2_NB_state_created;
@ -2671,7 +2671,7 @@ int _libssh2_channel_close(LIBSSH2_CHANNEL * channel)
late for us to wait for it. Continue closing! */ late for us to wait for it. Continue closing! */
if(channel->close_state == libssh2_NB_state_idle) { if(channel->close_state == libssh2_NB_state_idle) {
_libssh2_debug((session, LIBSSH2_TRACE_CONN, "Closing channel %lu/%lu", _libssh2_debug((session, LIBSSH2_TRACE_CONN, "Closing channel %u/%u",
channel->local.id, channel->remote.id)); channel->local.id, channel->remote.id));
channel->close_packet[0] = SSH_MSG_CHANNEL_CLOSE; channel->close_packet[0] = SSH_MSG_CHANNEL_CLOSE;
@ -2762,7 +2762,7 @@ static int channel_wait_closed(LIBSSH2_CHANNEL *channel)
if(channel->wait_closed_state == libssh2_NB_state_idle) { if(channel->wait_closed_state == libssh2_NB_state_idle) {
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Awaiting close of channel %lu/%lu", channel->local.id, "Awaiting close of channel %u/%u", channel->local.id,
channel->remote.id)); channel->remote.id));
channel->wait_closed_state = libssh2_NB_state_created; channel->wait_closed_state = libssh2_NB_state_created;
@ -2825,7 +2825,7 @@ int _libssh2_channel_free(LIBSSH2_CHANNEL *channel)
if(channel->free_state == libssh2_NB_state_idle) { if(channel->free_state == libssh2_NB_state_idle) {
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Freeing channel %lu/%lu resources", channel->local.id, "Freeing channel %u/%u resources", channel->local.id,
channel->remote.id)); channel->remote.id));
channel->free_state = libssh2_NB_state_created; channel->free_state = libssh2_NB_state_created;

2
src/comp.c
View File

@ -208,7 +208,7 @@ comp_method_zlib_comp(LIBSSH2_SESSION *session,
} }
_libssh2_debug((session, LIBSSH2_TRACE_TRANS, _libssh2_debug((session, LIBSSH2_TRACE_TRANS,
"unhandled zlib compression error %d, avail_out", "unhandled zlib compression error %d, avail_out %u",
status, strm->avail_out)); status, strm->avail_out));
return _libssh2_error(session, LIBSSH2_ERROR_ZLIB, "compression failure"); return _libssh2_error(session, LIBSSH2_ERROR_ZLIB, "compression failure");
} }

2
src/hostkey.c
View File

@ -106,7 +106,7 @@ hostkey_method_ssh_rsa_init(LIBSSH2_SESSION * session,
#endif #endif
{ {
_libssh2_debug((session, LIBSSH2_TRACE_ERROR, _libssh2_debug((session, LIBSSH2_TRACE_ERROR,
"unexpected rsa type: %.*s", type_len, type)); "unexpected rsa type: %.*s", (int)type_len, type));
return -1; return -1;
} }

4
src/kex.c
View File

@ -302,8 +302,8 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
exchange_state->e_packet + 6); exchange_state->e_packet + 6);
} }
_libssh2_debug((session, LIBSSH2_TRACE_KEX, "Sending KEX packet %d", _libssh2_debug((session, LIBSSH2_TRACE_KEX, "Sending KEX packet %u",
(int) packet_type_init)); (unsigned int) packet_type_init));
exchange_state->state = libssh2_NB_state_created; exchange_state->state = libssh2_NB_state_created;
} }

2
src/knownhost.c
View File

@ -1049,7 +1049,7 @@ knownhost_writeline(LIBSSH2_KNOWNHOSTS *hosts,
break; break;
} }
/* otherwise fallback to default and error */ /* otherwise fallback to default and error */
/* FALL-THROUGH */ LIBSSH2_FALLTHROUGH();
default: default:
return _libssh2_error(hosts->session, return _libssh2_error(hosts->session,
LIBSSH2_ERROR_METHOD_NOT_SUPPORTED, LIBSSH2_ERROR_METHOD_NOT_SUPPORTED,

22
src/libssh2_priv.h
View File

@ -106,12 +106,21 @@
#define TRUE 1 #define TRUE 1
#endif #endif
#if (defined(__GNUC__) || defined(__clang__)) && \
defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
!defined(__MINGW32__) && !defined(LIBSSH2_NO_FMT_CHECKS)
#define LIBSSH2_PRINTF(fmt, arg) __attribute__((format(printf, fmt, arg)))
#else
#define LIBSSH2_PRINTF(fmt, arg)
#endif
/* Use local implementation when not available */ /* Use local implementation when not available */
#if !defined(HAVE_SNPRINTF) #if !defined(HAVE_SNPRINTF)
#undef snprintf #undef snprintf
#define snprintf _libssh2_snprintf #define snprintf _libssh2_snprintf
#define LIBSSH2_SNPRINTF #define LIBSSH2_SNPRINTF
int _libssh2_snprintf(char *cp, size_t cp_max_len, const char *fmt, ...); int _libssh2_snprintf(char *cp, size_t cp_max_len, const char *fmt, ...)
LIBSSH2_PRINTF(3, 4);
#endif #endif
#if !defined(HAVE_GETTIMEOFDAY) #if !defined(HAVE_GETTIMEOFDAY)
@ -124,6 +133,15 @@ int _libssh2_gettimeofday(struct timeval *tp, void *tzp);
#include <sys/time.h> #include <sys/time.h>
#endif #endif
#if !defined(LIBSSH2_FALLTHROUGH)
#if (defined(__GNUC__) && __GNUC__ >= 7) || \
(defined(__clang__) && __clang_major__ >= 10)
# define LIBSSH2_FALLTHROUGH() __attribute__((fallthrough))
#else
# define LIBSSH2_FALLTHROUGH() do {} while (0)
#endif
#endif
/* "inline" keyword is valid only with C++ engine! */ /* "inline" keyword is valid only with C++ engine! */
#ifdef __GNUC__ #ifdef __GNUC__
#undef inline #undef inline
@ -1048,7 +1066,7 @@ struct _LIBSSH2_COMP_METHOD
#ifdef LIBSSH2DEBUG #ifdef LIBSSH2DEBUG
void void
_libssh2_debug_low(LIBSSH2_SESSION * session, int context, const char *format, _libssh2_debug_low(LIBSSH2_SESSION * session, int context, const char *format,
...); ...) LIBSSH2_PRINTF(3, 4);
#define _libssh2_debug(x) _libssh2_debug_low x #define _libssh2_debug(x) _libssh2_debug_low x
#else #else
#define _libssh2_debug(x) do {} while(0) #define _libssh2_debug(x) do {} while(0)

12
src/mbedtls.h
View File

@ -41,10 +41,18 @@
#define LIBSSH2_CRYPTO_ENGINE libssh2_mbedtls #define LIBSSH2_CRYPTO_ENGINE libssh2_mbedtls
/* mbedTLS (as of v3.5.1) has a duplicate function declaration
in its own public headers. Disable the warning that detects it. */
#ifdef __GNUC__ #ifdef __GNUC__
#pragma GCC diagnostic push #pragma GCC diagnostic push
/* mbedTLS (as of v3.5.1) has a `[-Werror=arith-conversion]`
warning in its public headers. */
#if !defined(__clang__) && __GNUC__ >= 10
#pragma GCC diagnostic ignored "-Warith-conversion"
#endif
#if defined(__clang__)
#pragma GCC diagnostic ignored "-Wsign-conversion"
#endif
/* mbedTLS (as of v3.5.1) has a duplicate function declaration
in its public headers. Disable the warning that detects it. */
#pragma GCC diagnostic ignored "-Wredundant-decls" #pragma GCC diagnostic ignored "-Wredundant-decls"
#endif #endif

14
src/misc.c
View File

@ -72,7 +72,14 @@ int _libssh2_snprintf(char *cp, size_t cp_max_len, const char *fmt, ...)
if(cp_max_len < 2) if(cp_max_len < 2)
return 0; return 0;
va_start(args, fmt); va_start(args, fmt);
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
n = vsnprintf(cp, cp_max_len, fmt, args); n = vsnprintf(cp, cp_max_len, fmt, args);
#ifdef __clang__
#pragma clang diagnostic pop
#endif
va_end(args); va_end(args);
return (n < (int)cp_max_len) ? n : (int)(cp_max_len - 1); return (n < (int)cp_max_len) ? n : (int)(cp_max_len - 1);
} }
@ -556,7 +563,14 @@ _libssh2_debug_low(LIBSSH2_SESSION * session, int context, const char *format,
buflen -= len; buflen -= len;
msglen = len; msglen = len;
va_start(vargs, format); va_start(vargs, format);
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
len = vsnprintf(buffer + msglen, buflen, format, vargs); len = vsnprintf(buffer + msglen, buflen, format, vargs);
#ifdef __clang__
#pragma clang diagnostic pop
#endif
va_end(vargs); va_end(vargs);
msglen += len < buflen ? len : buflen - 1; msglen += len < buflen ? len : buflen - 1;
} }

62
src/packet.c
View File

@ -126,7 +126,7 @@ packet_queue_listener(LIBSSH2_SESSION * session, unsigned char *data,
} }
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Remote received connection from %s:%ld to %s:%ld", "Remote received connection from %s:%u to %s:%u",
listen_state->shost, listen_state->sport, listen_state->shost, listen_state->sport,
listen_state->host, listen_state->port)); listen_state->host, listen_state->port));
@ -199,8 +199,8 @@ packet_queue_listener(LIBSSH2_SESSION * session, unsigned char *data,
channel->local.packet_size = listen_state->packet_size; channel->local.packet_size = listen_state->packet_size;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Connection queued: channel %lu/%lu " "Connection queued: channel %u/%u "
"win %lu/%lu packet %lu/%lu", "win %u/%u packet %u/%u",
channel->local.id, channel->remote.id, channel->local.id, channel->remote.id,
channel->local.window_size, channel->local.window_size,
channel->remote.window_size, channel->remote.window_size,
@ -339,7 +339,7 @@ packet_x11_open(LIBSSH2_SESSION * session, unsigned char *data,
} }
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"X11 Connection Received from %s:%ld on channel %lu", "X11 Connection Received from %s:%u on channel %u",
x11open_state->shost, x11open_state->sport, x11open_state->shost, x11open_state->sport,
x11open_state->sender_channel)); x11open_state->sender_channel));
@ -384,8 +384,8 @@ packet_x11_open(LIBSSH2_SESSION * session, unsigned char *data,
channel->local.packet_size = x11open_state->packet_size; channel->local.packet_size = x11open_state->packet_size;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"X11 Connection established: channel %lu/%lu " "X11 Connection established: channel %u/%u "
"win %lu/%lu packet %lu/%lu", "win %u/%u packet %u/%u",
channel->local.id, channel->remote.id, channel->local.id, channel->remote.id,
channel->local.window_size, channel->local.window_size,
channel->remote.window_size, channel->remote.window_size,
@ -497,7 +497,7 @@ packet_authagent_open(LIBSSH2_SESSION * session,
} }
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Auth Agent Connection Received on channel %lu", "Auth Agent Connection Received on channel %u",
authagent_state->sender_channel)); authagent_state->sender_channel));
authagent_state->state = libssh2_NB_state_allocated; authagent_state->state = libssh2_NB_state_allocated;
@ -545,7 +545,7 @@ packet_authagent_open(LIBSSH2_SESSION * session,
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Auth Agent Connection established: channel " "Auth Agent Connection established: channel "
"%lu/%lu win %lu/%lu packet %lu/%lu", "%u/%u win %u/%u packet %u/%u",
channel->local.id, channel->remote.id, channel->local.id, channel->remote.id,
channel->local.window_size, channel->local.window_size,
channel->remote.window_size, channel->remote.window_size,
@ -645,8 +645,8 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
switch(session->packAdd_state) { switch(session->packAdd_state) {
case libssh2_NB_state_idle: case libssh2_NB_state_idle:
_libssh2_debug((session, LIBSSH2_TRACE_TRANS, _libssh2_debug((session, LIBSSH2_TRACE_TRANS,
"Packet type %d received, length=%d", "Packet type %u received, length=%d",
(int) msg, (int) datalen)); (unsigned int) msg, (int) datalen));
if((macstate == LIBSSH2_MAC_INVALID) && if((macstate == LIBSSH2_MAC_INVALID) &&
(!session->macerror || (!session->macerror ||
@ -812,7 +812,8 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
_libssh2_debug((session, _libssh2_debug((session,
LIBSSH2_TRACE_KEX, LIBSSH2_TRACE_KEX,
"Server to Client extension %.*s: %.*s", "Server to Client extension %.*s: %.*s",
name_len, name, value_len, value)); (int)name_len, name,
(int)value_len, value));
} }
if(name_len == 15 && if(name_len == 15 &&
@ -860,7 +861,7 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
_libssh2_debug((session, _libssh2_debug((session,
LIBSSH2_TRACE_CONN, LIBSSH2_TRACE_CONN,
"Received global request type %.*s (wr %X)", "Received global request type %.*s (wr %X)",
len, data + 5, want_reply)); (int)len, data + 5, want_reply));
} }
@ -889,7 +890,7 @@ libssh2_packet_add_jump_point5:
/* streamid(4) */ /* streamid(4) */
data_head += 4; data_head += 4;
/* fall-through */ LIBSSH2_FALLTHROUGH();
/* /*
byte SSH_MSG_CHANNEL_DATA byte SSH_MSG_CHANNEL_DATA
@ -920,7 +921,7 @@ libssh2_packet_add_jump_point5:
stream_id = _libssh2_ntohu32(data + 5); stream_id = _libssh2_ntohu32(data + 5);
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"%d bytes packet_add() for %lu/%lu/%lu", "%d bytes packet_add() for %u/%u/%u",
(int) (datalen - data_head), (int) (datalen - data_head),
channelp->local.id, channelp->local.id,
channelp->remote.id, channelp->remote.id,
@ -944,11 +945,11 @@ libssh2_packet_add_jump_point5:
channelp->remote.window_size -= (uint32_t)(datalen - channelp->remote.window_size -= (uint32_t)(datalen -
data_head); data_head);
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"shrinking window size by %lu bytes to %lu, " "shrinking window size by %ld bytes to %u, "
"read_avail %lu", "read_avail %ld",
datalen - data_head, (long) (datalen - data_head),
channelp->remote.window_size, channelp->remote.window_size,
channelp->read_avail)); (long) channelp->read_avail));
session->packAdd_channelp = channelp; session->packAdd_channelp = channelp;
@ -1010,10 +1011,10 @@ libssh2_packet_add_jump_point1:
channelp->read_avail += datalen - data_head; channelp->read_avail += datalen - data_head;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"increasing read_avail by %lu bytes to %lu/%lu", "increasing read_avail by %ld bytes to %ld/%u",
(long)(datalen - data_head), (long)(datalen - data_head),
(long)channelp->read_avail, (long)channelp->read_avail,
(long)channelp->remote.window_size)); channelp->remote.window_size));
break; break;
@ -1033,7 +1034,7 @@ libssh2_packet_add_jump_point1:
else { else {
_libssh2_debug((session, _libssh2_debug((session,
LIBSSH2_TRACE_CONN, LIBSSH2_TRACE_CONN,
"EOF received for channel %lu/%lu", "EOF received for channel %u/%u",
channelp->local.id, channelp->local.id,
channelp->remote.id)); channelp->remote.id));
channelp->remote.eof = 1; channelp->remote.eof = 1;
@ -1061,8 +1062,8 @@ libssh2_packet_add_jump_point1:
_libssh2_debug((session, _libssh2_debug((session,
LIBSSH2_TRACE_CONN, LIBSSH2_TRACE_CONN,
"Channel %d received request type %.*s (wr %X)", "Channel %u received request type %.*s (wr %X)",
channel, len, data + 9, want_reply)); channel, (int)len, data + 9, want_reply));
if(len == strlen("exit-status") if(len == strlen("exit-status")
&& (strlen("exit-status") + 9) <= datalen && (strlen("exit-status") + 9) <= datalen
@ -1079,8 +1080,8 @@ libssh2_packet_add_jump_point1:
_libssh2_ntohu32(data + 10 + _libssh2_ntohu32(data + 10 +
strlen("exit-status")); strlen("exit-status"));
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Exit status %lu received for " "Exit status %d received for "
"channel %lu/%lu", "channel %u/%u",
channelp->exit_status, channelp->exit_status,
channelp->local.id, channelp->local.id,
channelp->remote.id)); channelp->remote.id));
@ -1120,7 +1121,7 @@ libssh2_packet_add_jump_point1:
/* TODO: save error message and language tag */ /* TODO: save error message and language tag */
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Exit signal %s received for " "Exit signal %s received for "
"channel %lu/%lu", "channel %u/%u",
channelp->exit_signal, channelp->exit_signal,
channelp->local.id, channelp->local.id,
channelp->remote.id)); channelp->remote.id));
@ -1161,7 +1162,7 @@ libssh2_packet_add_jump_point4:
return 0; return 0;
} }
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Close received for channel %lu/%lu", "Close received for channel %u/%u",
channelp->local.id, channelp->local.id,
channelp->remote.id)); channelp->remote.id));
@ -1251,8 +1252,8 @@ libssh2_packet_add_jump_authagent:
channelp->local.window_size += bytestoadd; channelp->local.window_size += bytestoadd;
_libssh2_debug((session, LIBSSH2_TRACE_CONN, _libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Window adjust for channel %lu/%lu, " "Window adjust for channel %u/%u, "
"adding %lu bytes, new window_size=%lu", "adding %u bytes, new window_size=%u",
channelp->local.id, channelp->local.id,
channelp->remote.id, channelp->remote.id,
bytestoadd, bytestoadd,
@ -1344,7 +1345,8 @@ _libssh2_packet_ask(LIBSSH2_SESSION * session, unsigned char packet_type,
LIBSSH2_PACKET *packet = _libssh2_list_first(&session->packets); LIBSSH2_PACKET *packet = _libssh2_list_first(&session->packets);
_libssh2_debug((session, LIBSSH2_TRACE_TRANS, _libssh2_debug((session, LIBSSH2_TRACE_TRANS,
"Looking for packet of type: %d", (int) packet_type)); "Looking for packet of type: %u",
(unsigned int)packet_type));
while(packet) { while(packet) {
if(packet->data[0] == packet_type if(packet->data[0] == packet_type

4
src/publickey.c
View File

@ -516,13 +516,13 @@ static LIBSSH2_PUBLICKEY *publickey_init(LIBSSH2_SESSION *session)
LIBSSH2_PUBLICKEY_VERSION) { LIBSSH2_PUBLICKEY_VERSION) {
_libssh2_debug((session, LIBSSH2_TRACE_PUBLICKEY, _libssh2_debug((session, LIBSSH2_TRACE_PUBLICKEY,
"Truncate remote publickey version " "Truncate remote publickey version "
"from %lu", "from %u",
session->pkeyInit_pkey->version)); session->pkeyInit_pkey->version));
session->pkeyInit_pkey->version = session->pkeyInit_pkey->version =
LIBSSH2_PUBLICKEY_VERSION; LIBSSH2_PUBLICKEY_VERSION;
} }
_libssh2_debug((session, LIBSSH2_TRACE_PUBLICKEY, _libssh2_debug((session, LIBSSH2_TRACE_PUBLICKEY,
"Enabling publickey subsystem version %lu", "Enabling publickey subsystem version %u",
session->pkeyInit_pkey->version)); session->pkeyInit_pkey->version));
LIBSSH2_FREE(session, session->pkeyInit_data); LIBSSH2_FREE(session, session->pkeyInit_data);
session->pkeyInit_data = NULL; session->pkeyInit_data = NULL;

2
src/scp.c
View File

@ -748,7 +748,7 @@ scp_recv(LIBSSH2_SESSION * session, const char *path, libssh2_struct_stat * sb)
} }
_libssh2_debug((session, LIBSSH2_TRACE_SCP, _libssh2_debug((session, LIBSSH2_TRACE_SCP,
"mode = 0%lo size = %ld", session->scpRecv_mode, "mode = 0%lo size = %ld", session->scpRecv_mode,
session->scpRecv_size)); (long)session->scpRecv_size));
/* We *should* check that basename is valid, but why let that /* We *should* check that basename is valid, but why let that
stop us? */ stop us? */

15
src/session.c
View File

@ -253,13 +253,14 @@ banner_send(LIBSSH2_SESSION * session)
LIBSSH2_SOCKET_SEND_FLAGS(session)); LIBSSH2_SOCKET_SEND_FLAGS(session));
if(ret < 0) if(ret < 0)
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"Error sending %d bytes: %d", "Error sending %ld bytes: %ld",
banner_len - session->banner_TxRx_total_send, -ret)); (long)(banner_len - session->banner_TxRx_total_send),
(long)-ret));
else else
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"Sent %d/%d bytes at %p+%d", ret, "Sent %ld/%ld bytes at %p+%ld", (long)ret,
banner_len - session->banner_TxRx_total_send, (long)(banner_len - session->banner_TxRx_total_send),
banner, session->banner_TxRx_total_send)); (void *)banner, (long)session->banner_TxRx_total_send));
if(ret != (ssize_t)(banner_len - session->banner_TxRx_total_send)) { if(ret != (ssize_t)(banner_len - session->banner_TxRx_total_send)) {
if(ret >= 0 || ret == -EAGAIN) { if(ret >= 0 || ret == -EAGAIN) {
@ -864,8 +865,8 @@ session_free(LIBSSH2_SESSION *session)
if(session->free_state == libssh2_NB_state_idle) { if(session->free_state == libssh2_NB_state_idle) {
_libssh2_debug((session, LIBSSH2_TRACE_TRANS, _libssh2_debug((session, LIBSSH2_TRACE_TRANS,
"Freeing session resource", "Freeing session resource %p",
session->remote.banner)); (void *)session->remote.banner));
session->free_state = libssh2_NB_state_created; session->free_state = libssh2_NB_state_created;
} }

43
src/sftp.c
View File

@ -152,7 +152,7 @@ remove_zombie_request(LIBSSH2_SFTP *sftp, uint32_t request_id)
request_id); request_id);
if(zombie) { if(zombie) {
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"Removing request ID %ld from the list of " "Removing request ID %u from the list of "
"zombie requests", "zombie requests",
request_id)); request_id));
@ -169,7 +169,7 @@ add_zombie_request(LIBSSH2_SFTP *sftp, uint32_t request_id)
struct sftp_zombie_requests *zombie; struct sftp_zombie_requests *zombie;
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"Marking request ID %ld as a zombie request", request_id)); "Marking request ID %u as a zombie request", request_id));
zombie = LIBSSH2_ALLOC(sftp->channel->session, zombie = LIBSSH2_ALLOC(sftp->channel->session,
sizeof(struct sftp_zombie_requests)); sizeof(struct sftp_zombie_requests));
@ -199,8 +199,8 @@ sftp_packet_add(LIBSSH2_SFTP *sftp, unsigned char *data,
} }
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"Received packet type %d (len %d)", "Received packet type %u (len %lu)",
(int) data[0], data_len)); (unsigned int)data[0], (unsigned long)data_len));
/* /*
* Experience shows that if we mess up EAGAIN handling somewhere or * Experience shows that if we mess up EAGAIN handling somewhere or
@ -306,11 +306,11 @@ sftp_packet_read(LIBSSH2_SFTP *sftp)
packet = sftp->partial_packet; packet = sftp->partial_packet;
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"partial read cont, len: %lu", sftp->partial_len)); "partial read cont, len: %u", sftp->partial_len));
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"partial read cont, already recvd: %lu", "partial read cont, already recvd: %lu",
sftp->partial_received)); (unsigned long)sftp->partial_received));
/* fall-through */ LIBSSH2_FALLTHROUGH();
default: default:
if(!packet) { if(!packet) {
/* only do this if there's not already a packet buffer allocated /* only do this if there's not already a packet buffer allocated
@ -359,7 +359,7 @@ sftp_packet_read(LIBSSH2_SFTP *sftp)
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"Data begin - Packet Length: %lu", "Data begin - Packet Length: %lu",
sftp->partial_len)); (unsigned long)sftp->partial_len));
packet = LIBSSH2_ALLOC(session, sftp->partial_len); packet = LIBSSH2_ALLOC(session, sftp->partial_len);
if(!packet) if(!packet)
return _libssh2_error(session, LIBSSH2_ERROR_ALLOC, return _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
@ -526,13 +526,13 @@ sftp_packet_require(LIBSSH2_SFTP *sftp, unsigned char packet_type,
return LIBSSH2_ERROR_BAD_USE; return LIBSSH2_ERROR_BAD_USE;
} }
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, "Requiring packet %d id %ld", _libssh2_debug((session, LIBSSH2_TRACE_SFTP, "Requiring packet %u id %u",
(int) packet_type, request_id)); (unsigned int) packet_type, request_id));
if(sftp_packet_ask(sftp, packet_type, request_id, data, data_len) == 0) { if(sftp_packet_ask(sftp, packet_type, request_id, data, data_len) == 0) {
/* The right packet was available in the packet brigade */ /* The right packet was available in the packet brigade */
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, "Got %d", _libssh2_debug((session, LIBSSH2_TRACE_SFTP, "Got %u",
(int) packet_type)); (unsigned int) packet_type));
if(*data_len < required_size) { if(*data_len < required_size) {
return LIBSSH2_ERROR_BUFFER_TOO_SMALL; return LIBSSH2_ERROR_BUFFER_TOO_SMALL;
@ -550,7 +550,7 @@ sftp_packet_require(LIBSSH2_SFTP *sftp, unsigned char packet_type,
if(!sftp_packet_ask(sftp, packet_type, request_id, data, data_len)) { if(!sftp_packet_ask(sftp, packet_type, request_id, data, data_len)) {
/* The right packet was available in the packet brigade */ /* The right packet was available in the packet brigade */
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, "Got %d", _libssh2_debug((session, LIBSSH2_TRACE_SFTP, "Got %d",
(int) packet_type)); (unsigned int) packet_type));
if(*data_len < required_size) { if(*data_len < required_size) {
return LIBSSH2_ERROR_BUFFER_TOO_SMALL; return LIBSSH2_ERROR_BUFFER_TOO_SMALL;
@ -979,12 +979,12 @@ static LIBSSH2_SFTP *sftp_init(LIBSSH2_SESSION *session)
if(sftp_handle->version > LIBSSH2_SFTP_VERSION) { if(sftp_handle->version > LIBSSH2_SFTP_VERSION) {
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"Truncating remote SFTP version from %lu", "Truncating remote SFTP version from %u",
sftp_handle->version)); sftp_handle->version));
sftp_handle->version = LIBSSH2_SFTP_VERSION; sftp_handle->version = LIBSSH2_SFTP_VERSION;
} }
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"Enabling SFTP version %lu compatibility", "Enabling SFTP version %u compatibility",
sftp_handle->version)); sftp_handle->version));
while(buf.dataptr < endp) { while(buf.dataptr < endp) {
unsigned char *extname, *extdata; unsigned char *extname, *extdata;
@ -1570,7 +1570,7 @@ static ssize_t sftp_read(LIBSSH2_SFTP_HANDLE * handle, char *buffer,
"read request id %d sent (offset: %d, size: %d)", "read request id %d sent (offset: %d, size: %d)",
request_id, (int)chunk->offset, (int)chunk->len)); request_id, (int)chunk->offset, (int)chunk->len));
} }
/* FALL-THROUGH */ LIBSSH2_FALLTHROUGH();
case libssh2_NB_state_sent: case libssh2_NB_state_sent:
sftp->read_state = libssh2_NB_state_idle; sftp->read_state = libssh2_NB_state_idle;
@ -1610,7 +1610,7 @@ static ssize_t sftp_read(LIBSSH2_SFTP_HANDLE * handle, char *buffer,
/* move on to the next chunk with data to send */ /* move on to the next chunk with data to send */
chunk = _libssh2_list_next(&chunk->node); chunk = _libssh2_list_next(&chunk->node);
} }
/* FALL-THROUGH */ LIBSSH2_FALLTHROUGH();
case libssh2_NB_state_sent2: case libssh2_NB_state_sent2:
@ -1921,8 +1921,8 @@ static ssize_t sftp_readdir(LIBSSH2_SFTP_HANDLE *handle, char *buffer,
end: end:
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, _libssh2_debug((session, LIBSSH2_TRACE_SFTP,
"libssh2_sftp_readdir_ex() return %d", "libssh2_sftp_readdir_ex() return %lu",
filename_len)); (unsigned long)filename_len));
return (ssize_t)filename_len; return (ssize_t)filename_len;
} }
@ -2002,7 +2002,7 @@ end:
sftp->readdir_state = libssh2_NB_state_idle; sftp->readdir_state = libssh2_NB_state_idle;
num_names = _libssh2_ntohu32(data + 5); num_names = _libssh2_ntohu32(data + 5);
_libssh2_debug((session, LIBSSH2_TRACE_SFTP, "%lu entries returned", _libssh2_debug((session, LIBSSH2_TRACE_SFTP, "%u entries returned",
num_names)); num_names));
if(!num_names) { if(!num_names) {
LIBSSH2_FREE(session, data); LIBSSH2_FREE(session, data);
@ -2184,7 +2184,8 @@ static ssize_t sftp_write(LIBSSH2_SFTP_HANDLE *handle, const char *buffer,
chunk = _libssh2_list_next(&chunk->node); chunk = _libssh2_list_next(&chunk->node);
} }
/* fall-through */ LIBSSH2_FALLTHROUGH();
case libssh2_NB_state_sent: case libssh2_NB_state_sent:
sftp->write_state = libssh2_NB_state_idle; sftp->write_state = libssh2_NB_state_idle;

28
src/transport.c
View File

@ -464,13 +464,15 @@ int _libssh2_transport_read(LIBSSH2_SESSION * session)
return LIBSSH2_ERROR_EAGAIN; return LIBSSH2_ERROR_EAGAIN;
} }
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"Error recving %d bytes (got %d)", "Error recving %ld bytes (got %ld)",
PACKETBUFSIZE - remainbuf, -nread)); (long)(PACKETBUFSIZE - remainbuf),
(long)-nread));
return LIBSSH2_ERROR_SOCKET_RECV; return LIBSSH2_ERROR_SOCKET_RECV;
} }
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"Recved %d/%d bytes to %p+%d", nread, "Recved %ld/%ld bytes to %p+%ld", (long)nread,
PACKETBUFSIZE - remainbuf, p->buf, remainbuf)); (long)(PACKETBUFSIZE - remainbuf), (void *)p->buf,
(long)remainbuf));
debugdump(session, "libssh2_transport_read() raw", debugdump(session, "libssh2_transport_read() raw",
&p->buf[remainbuf], nread); &p->buf[remainbuf], nread);
@ -787,11 +789,12 @@ send_existing(LIBSSH2_SESSION *session, const unsigned char *data,
LIBSSH2_SOCKET_SEND_FLAGS(session)); LIBSSH2_SOCKET_SEND_FLAGS(session));
if(rc < 0) if(rc < 0)
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"Error sending %d bytes: %d", length, -rc)); "Error sending %ld bytes: %ld",
(long)length, (long)-rc));
else { else {
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"Sent %d/%d bytes at %p+%d", rc, length, p->outbuf, "Sent %ld/%ld bytes at %p+%lu", (long)rc, (long)length,
p->osent)); (void *)p->outbuf, (unsigned long)p->osent));
debugdump(session, "libssh2_transport_write send()", debugdump(session, "libssh2_transport_write send()",
&p->outbuf[p->osent], rc); &p->outbuf[p->osent], rc);
} }
@ -1055,8 +1058,8 @@ int _libssh2_transport_send(LIBSSH2_SESSION *session,
i += bsize - session->local.crypt->blocksize; i += bsize - session->local.crypt->blocksize;
} }
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"crypting bytes %d-%d", i, "crypting bytes %lu-%lu", (unsigned long)i,
i + bsize - 1)); (unsigned long)(i + bsize - 1)));
if(session->local.crypt->crypt(session, ptr, if(session->local.crypt->crypt(session, ptr,
bsize, bsize,
&session->local.crypt_abstract, &session->local.crypt_abstract,
@ -1094,11 +1097,12 @@ int _libssh2_transport_send(LIBSSH2_SESSION *session,
LIBSSH2_SOCKET_SEND_FLAGS(session)); LIBSSH2_SOCKET_SEND_FLAGS(session));
if(ret < 0) if(ret < 0)
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"Error sending %d bytes: %d", total_length, -ret)); "Error sending %ld bytes: %ld",
(long)total_length, (long)-ret));
else { else {
_libssh2_debug((session, LIBSSH2_TRACE_SOCKET, _libssh2_debug((session, LIBSSH2_TRACE_SOCKET,
"Sent %d/%d bytes at %p", "Sent %ld/%ld bytes at %p",
ret, total_length, p->outbuf)); (long)ret, (long)total_length, (void *)p->outbuf));
debugdump(session, "libssh2_transport_write send()", p->outbuf, ret); debugdump(session, "libssh2_transport_write send()", p->outbuf, ret);
} }

2
src/userauth.c
View File

@ -1517,7 +1517,7 @@ retry_auth:
_libssh2_debug((session, _libssh2_debug((session,
LIBSSH2_TRACE_KEX, LIBSSH2_TRACE_KEX,
"Signing using %.*s", "Signing using %.*s",
session->userauth_pblc_method_len, (int)session->userauth_pblc_method_len,
session->userauth_pblc_method)); session->userauth_pblc_method));
} }

24
src/wincng.c
View File

@ -1294,7 +1294,7 @@ _libssh2_wincng_rsa_sha_sign(LIBSSH2_SESSION *session,
BCRYPT_PKCS1_PADDING_INFO paddingInfo; BCRYPT_PKCS1_PADDING_INFO paddingInfo;
unsigned char *data, *sig; unsigned char *data, *sig;
ULONG cbData, datalen, siglen; ULONG cbData, datalen, siglen;
int ret; NTSTATUS ret;
if(hash_len == SHA_DIGEST_LENGTH) if(hash_len == SHA_DIGEST_LENGTH)
paddingInfo.pszAlgId = BCRYPT_SHA1_ALGORITHM; paddingInfo.pszAlgId = BCRYPT_SHA1_ALGORITHM;
@ -1336,7 +1336,7 @@ _libssh2_wincng_rsa_sha_sign(LIBSSH2_SESSION *session,
} }
} }
else else
ret = STATUS_NO_MEMORY; ret = (NTSTATUS)STATUS_NO_MEMORY;
} }
_libssh2_wincng_safe_free(data, datalen); _libssh2_wincng_safe_free(data, datalen);
@ -1627,7 +1627,7 @@ _libssh2_wincng_dsa_sha1_sign(libssh2_dsa_ctx *dsa,
{ {
unsigned char *data, *sig; unsigned char *data, *sig;
ULONG cbData, datalen, siglen; ULONG cbData, datalen, siglen;
int ret; NTSTATUS ret;
datalen = (ULONG)hash_len; datalen = (ULONG)hash_len;
data = malloc(datalen); data = malloc(datalen);
@ -1653,10 +1653,10 @@ _libssh2_wincng_dsa_sha1_sign(libssh2_dsa_ctx *dsa,
_libssh2_wincng_safe_free(sig, siglen); _libssh2_wincng_safe_free(sig, siglen);
} }
else else
ret = STATUS_NO_MEMORY; ret = (NTSTATUS)STATUS_NO_MEMORY;
} }
else else
ret = STATUS_NO_MEMORY; ret = (NTSTATUS)STATUS_NO_MEMORY;
} }
_libssh2_wincng_safe_free(data, datalen); _libssh2_wincng_safe_free(data, datalen);
@ -2051,7 +2051,7 @@ _libssh2_wincng_cipher_crypt(_libssh2_cipher_ctx *ctx,
{ {
unsigned char *pbOutput, *pbInput; unsigned char *pbOutput, *pbInput;
ULONG cbOutput, cbInput; ULONG cbOutput, cbInput;
int ret; NTSTATUS ret;
(void)type; (void)type;
(void)firstlast; (void)firstlast;
@ -2099,7 +2099,7 @@ _libssh2_wincng_cipher_crypt(_libssh2_cipher_ctx *ctx,
_libssh2_wincng_safe_free(pbOutput, cbOutput); _libssh2_wincng_safe_free(pbOutput, cbOutput);
} }
else else
ret = STATUS_NO_MEMORY; ret = (NTSTATUS)STATUS_NO_MEMORY;
} }
return BCRYPT_SUCCESS(ret) ? 0 : -1; return BCRYPT_SUCCESS(ret) ? 0 : -1;
@ -2218,7 +2218,7 @@ _libssh2_wincng_bignum_mod_exp(_libssh2_bn *r,
BCRYPT_RSAKEY_BLOB *rsakey; BCRYPT_RSAKEY_BLOB *rsakey;
unsigned char *bignum; unsigned char *bignum;
ULONG keylen, offset, length; ULONG keylen, offset, length;
int ret; NTSTATUS ret;
if(!r || !a || !p || !m) if(!r || !a || !p || !m)
return -1; return -1;
@ -2270,10 +2270,10 @@ _libssh2_wincng_bignum_mod_exp(_libssh2_bn *r,
} }
} }
else else
ret = STATUS_NO_MEMORY; ret = (NTSTATUS)STATUS_NO_MEMORY;
} }
else else
ret = STATUS_NO_MEMORY; ret = (NTSTATUS)STATUS_NO_MEMORY;
} }
BCryptDestroyKey(hKey); BCryptDestroyKey(hKey);
@ -2628,7 +2628,7 @@ _libssh2_dh_secret(_libssh2_dh_ctx *dhctx, _libssh2_bn *secret,
BCRYPT_KEY_HANDLE peer_public = NULL; BCRYPT_KEY_HANDLE peer_public = NULL;
BCRYPT_SECRET_HANDLE agreement = NULL; BCRYPT_SECRET_HANDLE agreement = NULL;
ULONG secret_len_bytes = 0; ULONG secret_len_bytes = 0;
int status; NTSTATUS status;
unsigned char *start, *end; unsigned char *start, *end;
BCRYPT_DH_KEY_BLOB *public_blob; BCRYPT_DH_KEY_BLOB *public_blob;
ULONG key_length_bytes = max(f->length, dhctx->dh_params->cbKeyLength); ULONG key_length_bytes = max(f->length, dhctx->dh_params->cbKeyLength);
@ -2694,7 +2694,7 @@ _libssh2_dh_secret(_libssh2_dh_ctx *dhctx, _libssh2_bn *secret,
/* Expand the secret bignum to be ready to receive the derived secret /* Expand the secret bignum to be ready to receive the derived secret
* */ * */
if(_libssh2_wincng_bignum_resize(secret, secret_len_bytes)) { if(_libssh2_wincng_bignum_resize(secret, secret_len_bytes)) {
status = STATUS_NO_MEMORY; status = (NTSTATUS)STATUS_NO_MEMORY;
goto out; goto out;
} }

22
tests/openssh_fixture.c
View File

@ -94,7 +94,14 @@ static int run_command_varg(char **output, const char *command, va_list args)
} }
/* Format the command string */ /* Format the command string */
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
ret = vsnprintf(command_buf, sizeof(command_buf), command, args); ret = vsnprintf(command_buf, sizeof(command_buf), command, args);
#ifdef __clang__
#pragma clang diagnostic pop
#endif
if(ret < 0 || ret >= BUFSIZ) { if(ret < 0 || ret >= BUFSIZ) {
fprintf(stderr, "Unable to format command (%s)\n", command); fprintf(stderr, "Unable to format command (%s)\n", command);
return -1; return -1;
@ -144,6 +151,9 @@ static int run_command_varg(char **output, const char *command, va_list args)
return ret; return ret;
} }
static int run_command(char **output, const char *command, ...)
LIBSSH2_PRINTF(2, 3);
static int run_command(char **output, const char *command, ...) static int run_command(char **output, const char *command, ...)
{ {
va_list args; va_list args;
@ -164,7 +174,6 @@ static const char *openssh_server_image(void)
static int build_openssh_server_docker_image(void) static int build_openssh_server_docker_image(void)
{ {
if(have_docker) { if(have_docker) {
char buildcmd[1024];
const char *container_image_name = openssh_server_image(); const char *container_image_name = openssh_server_image();
if(container_image_name) { if(container_image_name) {
int ret = run_command(NULL, "docker pull %s", int ret = run_command(NULL, "docker pull %s",
@ -177,12 +186,9 @@ static int build_openssh_server_docker_image(void)
} }
} }
} }
buildcmd[sizeof(buildcmd)-1] = 0; return run_command(NULL,
snprintf(buildcmd, sizeof(buildcmd)-1,
"docker build --quiet -t libssh2/openssh_server %s", "docker build --quiet -t libssh2/openssh_server %s",
srcdir_path("openssh_server")); srcdir_path("openssh_server"));
return run_command(NULL, buildcmd);
} }
else { else {
return 0; return 0;
@ -276,7 +282,7 @@ static int ip_address_from_container(char *container_id, char **ip_address_out)
https://github.com/docker/machine/issues/2612), so we retry a few https://github.com/docker/machine/issues/2612), so we retry a few
times with exponential backoff if it fails */ times with exponential backoff if it fails */
int attempt_no = 0; int attempt_no = 0;
int wait_time = 500; unsigned int wait_time = 500;
for(;;) { for(;;) {
int ret = run_command(ip_address_out, "docker-machine ip %s", int ret = run_command(ip_address_out, "docker-machine ip %s",
active_docker_machine); active_docker_machine);
@ -338,7 +344,7 @@ static libssh2_socket_t open_socket_to_container(char *container_id)
uint32_t hostaddr; uint32_t hostaddr;
libssh2_socket_t sock; libssh2_socket_t sock;
struct sockaddr_in sin; struct sockaddr_in sin;
int counter; unsigned int counter;
libssh2_socket_t ret = LIBSSH2_INVALID_SOCKET; libssh2_socket_t ret = LIBSSH2_INVALID_SOCKET;
if(have_docker) { if(have_docker) {
@ -393,7 +399,7 @@ static libssh2_socket_t open_socket_to_container(char *container_id)
} }
sin.sin_family = AF_INET; sin.sin_family = AF_INET;
sin.sin_port = htons((short)strtol(port_string, NULL, 0)); sin.sin_port = htons((unsigned short)strtol(port_string, NULL, 0));
sin.sin_addr.s_addr = hostaddr; sin.sin_addr.s_addr = hostaddr;
for(counter = 0; counter < 3; ++counter) { for(counter = 0; counter < 3; ++counter) {

13
tests/session_fixture.c
View File

@ -403,7 +403,7 @@ static int read_file(const char *path, char **out_buffer, size_t *out_len)
{ {
FILE *fp; FILE *fp;
char *buffer; char *buffer;
size_t len; ssize_t len;
if(!out_buffer || !out_len || !path) { if(!out_buffer || !out_len || !path) {
fprintf(stderr, "invalid params.\n"); fprintf(stderr, "invalid params.\n");
@ -422,16 +422,21 @@ static int read_file(const char *path, char **out_buffer, size_t *out_len)
fseek(fp, 0L, SEEK_END); fseek(fp, 0L, SEEK_END);
len = ftell(fp); len = ftell(fp);
if(len < 0) {
fclose(fp);
fprintf(stderr, "Could not determine input size of: %s\n", path);
return 1;
}
rewind(fp); rewind(fp);
buffer = calloc(1, len + 1); buffer = calloc(1, (size_t)len + 1);
if(!buffer) { if(!buffer) {
fclose(fp); fclose(fp);
fprintf(stderr, "Could not alloc memory.\n"); fprintf(stderr, "Could not alloc memory.\n");
return 1; return 1;
} }
if(1 != fread(buffer, len, 1, fp)) { if(1 != fread(buffer, (size_t)len, 1, fp)) {
fclose(fp); fclose(fp);
free(buffer); free(buffer);
fprintf(stderr, "Could not read file into memory.\n"); fprintf(stderr, "Could not read file into memory.\n");
@ -441,7 +446,7 @@ static int read_file(const char *path, char **out_buffer, size_t *out_len)
fclose(fp); fclose(fp);
*out_buffer = buffer; *out_buffer = buffer;
*out_len = len; *out_len = (size_t)len;
return 0; return 0;
} }

4
tests/test_auth_keyboard_info_request.c
View File

@ -52,7 +52,7 @@ struct expected {
}; };
struct test_case { struct test_case {
const char *data; const char *data;
int data_len; unsigned int data_len;
struct expected expected; struct expected expected;
}; };
@ -248,7 +248,7 @@ LIBSSH2_FREE_FUNC(test_free)
static static
int test_case(int num, int test_case(int num,
const char *data, int data_len, void *abstract, const char *data, unsigned int data_len, void *abstract,
struct expected expected) struct expected expected)
{ {
int rc; int rc;

8
tests/test_hostkey_hash.c
View File

@ -46,10 +46,10 @@ static const char *EXPECTED_ED25519_SHA256_HASH_DIGEST =
"2638B020F6121FA750A7F4754B718419F621814C6E779D68ADF26AA68814ADDF"; "2638B020F6121FA750A7F4754B718419F621814C6E779D68ADF26AA68814ADDF";
#if LIBSSH2_MD5 #if LIBSSH2_MD5
static const int MD5_HASH_SIZE = 16; static const size_t MD5_HASH_SIZE = 16;
#endif #endif
static const int SHA1_HASH_SIZE = 20; static const size_t SHA1_HASH_SIZE = 20;
static const int SHA256_HASH_SIZE = 32; static const size_t SHA256_HASH_SIZE = 32;
static void calculate_digest(const char *hash, size_t hash_len, char *buffer, static void calculate_digest(const char *hash, size_t hash_len, char *buffer,
size_t buffer_len) size_t buffer_len)
@ -59,7 +59,7 @@ static void calculate_digest(const char *hash, size_t hash_len, char *buffer,
char *end = buffer + buffer_len; char *end = buffer + buffer_len;
for(i = 0; i < hash_len && p < end; ++i) { for(i = 0; i < hash_len && p < end; ++i) {
p += snprintf(p, end - p, "%02X", (unsigned char)hash[i]); p += snprintf(p, (size_t)(end - p), "%02X", (unsigned char)hash[i]);
} }
} }

2
tests/test_ssh2.c
View File

@ -51,7 +51,7 @@ int main(int argc, char *argv[])
int rc; int rc;
LIBSSH2_SESSION *session = NULL; LIBSSH2_SESSION *session = NULL;
LIBSSH2_CHANNEL *channel; LIBSSH2_CHANNEL *channel;
int counter; unsigned int counter;
#ifdef _WIN32 #ifdef _WIN32
WSADATA wsadata; WSADATA wsadata;