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authorJeremy Allison <jra@samba.org>2005-06-13 22:26:08 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 10:57:13 -0500
commit33a4c0b5a1052026193dcbb800e2bccb1b832730 (patch)
treef0daa5eec45dcbeb80f21661bb9259b17d3780ac /source3/lib
parenta59149b86a36cd8b51ad5ae11b4d2b0714bb5e9c (diff)
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r7554: Refactor very messy code in util_sock.c Remove write_socket_data/read_socket_data
as they do nothing that write_socket/read_socket don't do. Add a more useful error message when read_socket/write_socket error out on the main client fd for a process (ie. try and list the IP of the client that errored). Jeremy. (This used to be commit cbd7578e7c226e6a8002542141b914ed4c7a8269)
Diffstat (limited to 'source3/lib')
-rw-r--r--source3/lib/util_sock.c228
1 files changed, 95 insertions, 133 deletions
diff --git a/source3/lib/util_sock.c b/source3/lib/util_sock.c
index 6107e5abed..e5e16f1c48 100644
--- a/source3/lib/util_sock.c
+++ b/source3/lib/util_sock.c
@@ -3,6 +3,7 @@
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Tim Potter 2000-2001
+ Copyright (C) Jeremy Allison 1992-2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -21,13 +22,15 @@
#include "includes.h"
-/* the last IP received from */
-struct in_addr lastip;
-
-/* the last port received from */
-int lastport=0;
+/* the following 3 client_*() functions are nasty ways of allowing
+ some generic functions to get info that really should be hidden in
+ particular modules */
+static int client_fd = -1;
-int smb_read_error = 0;
+void client_setfd(int fd)
+{
+ client_fd = fd;
+}
static char *get_socket_addr(int fd)
{
@@ -69,6 +72,47 @@ static int get_socket_port(int fd)
return ntohs(sockin->sin_port);
}
+char *client_name(void)
+{
+ return get_peer_name(client_fd,False);
+}
+
+char *client_addr(void)
+{
+ return get_peer_addr(client_fd);
+}
+
+char *client_socket_addr(void)
+{
+ return get_socket_addr(client_fd);
+}
+
+int client_socket_port(void)
+{
+ return get_socket_port(client_fd);
+}
+
+struct in_addr *client_inaddr(struct sockaddr *sa)
+{
+ struct sockaddr_in *sockin = (struct sockaddr_in *) (sa);
+ socklen_t length = sizeof(*sa);
+
+ if (getpeername(client_fd, sa, &length) < 0) {
+ DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
+ return NULL;
+ }
+
+ return &sockin->sin_addr;
+}
+
+/* the last IP received from */
+struct in_addr lastip;
+
+/* the last port received from */
+int lastport=0;
+
+int smb_read_error = 0;
+
/****************************************************************************
Determine if a file descriptor is in fact a socket.
****************************************************************************/
@@ -356,8 +400,10 @@ ssize_t read_socket_with_timeout(int fd,char *buf,size_t mincnt,size_t maxcnt,un
smb_read_error = 0;
/* Blocking read */
- if (time_out <= 0) {
- if (mincnt == 0) mincnt = maxcnt;
+ if (time_out == 0) {
+ if (mincnt == 0) {
+ mincnt = maxcnt;
+ }
while (nread < mincnt) {
readret = sys_read(fd, buf + nread, maxcnt - nread);
@@ -369,7 +415,13 @@ ssize_t read_socket_with_timeout(int fd,char *buf,size_t mincnt,size_t maxcnt,un
}
if (readret == -1) {
- DEBUG(0,("read_socket_with_timeout: read error = %s.\n", strerror(errno) ));
+ if (fd == client_fd) {
+ /* Try and give an error message saying what client failed. */
+ DEBUG(0,("read_socket_with_timeout: client %s read error = %s.\n",
+ client_addr(), strerror(errno) ));
+ } else {
+ DEBUG(0,("read_socket_with_timeout: read error = %s.\n", strerror(errno) ));
+ }
smb_read_error = READ_ERROR;
return -1;
}
@@ -397,7 +449,13 @@ ssize_t read_socket_with_timeout(int fd,char *buf,size_t mincnt,size_t maxcnt,un
/* Check if error */
if (selrtn == -1) {
/* something is wrong. Maybe the socket is dead? */
- DEBUG(0,("read_socket_with_timeout: timeout read. select error = %s.\n", strerror(errno) ));
+ if (fd == client_fd) {
+ /* Try and give an error message saying what client failed. */
+ DEBUG(0,("read_socket_with_timeout: timeout read for client %s. select error = %s.\n",
+ client_addr(), strerror(errno) ));
+ } else {
+ DEBUG(0,("read_socket_with_timeout: timeout read. select error = %s.\n", strerror(errno) ));
+ }
smb_read_error = READ_ERROR;
return -1;
}
@@ -420,7 +478,13 @@ ssize_t read_socket_with_timeout(int fd,char *buf,size_t mincnt,size_t maxcnt,un
if (readret == -1) {
/* the descriptor is probably dead */
- DEBUG(0,("read_socket_with_timeout: timeout read. read error = %s.\n", strerror(errno) ));
+ if (fd == client_fd) {
+ /* Try and give an error message saying what client failed. */
+ DEBUG(0,("read_socket_with_timeout: timeout read to client %s. read error = %s.\n",
+ client_addr(), strerror(errno) ));
+ } else {
+ DEBUG(0,("read_socket_with_timeout: timeout read. read error = %s.\n", strerror(errno) ));
+ }
smb_read_error = READ_ERROR;
return -1;
}
@@ -453,37 +517,13 @@ ssize_t read_data(int fd,char *buffer,size_t N)
}
if (ret == -1) {
- DEBUG(0,("read_data: read failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
- smb_read_error = READ_ERROR;
- return -1;
- }
- total += ret;
- }
- return (ssize_t)total;
-}
-
-/****************************************************************************
- Read data from a socket, reading exactly N bytes.
-****************************************************************************/
-
-static ssize_t read_socket_data(int fd,char *buffer,size_t N)
-{
- ssize_t ret;
- size_t total=0;
-
- smb_read_error = 0;
-
- while (total < N) {
- ret = sys_read(fd,buffer + total,N - total);
-
- if (ret == 0) {
- DEBUG(10,("read_socket_data: recv of %d returned 0. Error = %s\n", (int)(N - total), strerror(errno) ));
- smb_read_error = READ_EOF;
- return 0;
- }
-
- if (ret == -1) {
- DEBUG(0,("read_socket_data: recv failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
+ if (fd == client_fd) {
+ /* Try and give an error message saying what client failed. */
+ DEBUG(0,("read_data: read failure for %d bytes to client %s. Error = %s\n",
+ (int)(N - total), client_addr(), strerror(errno) ));
+ } else {
+ DEBUG(0,("read_data: read failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
+ }
smb_read_error = READ_ERROR;
return -1;
}
@@ -505,35 +545,19 @@ ssize_t write_data(int fd, const char *buffer, size_t N)
ret = sys_write(fd,buffer + total,N - total);
if (ret == -1) {
- DEBUG(0,("write_data: write failure. Error = %s\n", strerror(errno) ));
+ if (fd == client_fd) {
+ /* Try and give an error message saying what client failed. */
+ DEBUG(0,("write_data: write failure in writing to client %s. Error %s\n",
+ client_addr(), strerror(errno) ));
+ } else {
+ DEBUG(0,("write_data: write failure. Error = %s\n", strerror(errno) ));
+ }
return -1;
}
- if (ret == 0)
- return total;
-
- total += ret;
- }
- return (ssize_t)total;
-}
-
-/****************************************************************************
- Write data to a socket - use send rather than write.
-****************************************************************************/
-
-static ssize_t write_socket_data(int fd, const char *buffer, size_t N)
-{
- size_t total=0;
- ssize_t ret;
-
- while (total < N) {
- ret = sys_send(fd,buffer + total,N - total,0);
- if (ret == -1) {
- DEBUG(0,("write_socket_data: write failure. Error = %s\n", strerror(errno) ));
- return -1;
- }
- if (ret == 0)
+ if (ret == 0) {
return total;
+ }
total += ret;
}
@@ -541,25 +565,6 @@ static ssize_t write_socket_data(int fd, const char *buffer, size_t N)
}
/****************************************************************************
- Write to a socket.
-****************************************************************************/
-
-ssize_t write_socket(int fd, const char *buf, size_t len)
-{
- ssize_t ret=0;
-
- DEBUG(6,("write_socket(%d,%d)\n",fd,(int)len));
- ret = write_socket_data(fd,buf,len);
-
- DEBUG(6,("write_socket(%d,%d) wrote %d\n",fd,(int)len,(int)ret));
- if(ret <= 0)
- DEBUG(0,("write_socket: Error writing %d bytes to socket %d: ERRNO = %s\n",
- (int)len, fd, strerror(errno) ));
-
- return(ret);
-}
-
-/****************************************************************************
Send a keepalive packet (rfc1002).
****************************************************************************/
@@ -570,7 +575,7 @@ BOOL send_keepalive(int client)
buf[0] = SMBkeepalive;
buf[1] = buf[2] = buf[3] = 0;
- return(write_socket_data(client,(char *)buf,4) == 4);
+ return(write_data(client,(char *)buf,4) == 4);
}
@@ -592,7 +597,7 @@ static ssize_t read_smb_length_return_keepalive(int fd, char *inbuf, unsigned in
if (timeout > 0)
ok = (read_socket_with_timeout(fd,inbuf,4,4,timeout) == 4);
else
- ok = (read_socket_data(fd,inbuf,4) == 4);
+ ok = (read_data(fd,inbuf,4) == 4);
if (!ok)
return(-1);
@@ -693,7 +698,7 @@ BOOL receive_smb_raw(int fd, char *buffer, unsigned int timeout)
if (timeout > 0) {
ret = read_socket_with_timeout(fd,buffer+4,len,len,timeout);
} else {
- ret = read_socket_data(fd,buffer+4,len);
+ ret = read_data(fd,buffer+4,len);
}
if (ret != len) {
@@ -748,7 +753,7 @@ BOOL send_smb(int fd, char *buffer)
len = smb_len(buffer) + 4;
while (nwritten < len) {
- ret = write_socket(fd,buffer+nwritten,len - nwritten);
+ ret = write_data(fd,buffer+nwritten,len - nwritten);
if (ret <= 0) {
DEBUG(0,("Error writing %d bytes to client. %d. (%s)\n",
(int)len,(int)ret, strerror(errno) ));
@@ -1086,49 +1091,6 @@ int open_udp_socket(const char *host, int port)
}
-/* the following 3 client_*() functions are nasty ways of allowing
- some generic functions to get info that really should be hidden in
- particular modules */
-static int client_fd = -1;
-
-void client_setfd(int fd)
-{
- client_fd = fd;
-}
-
-char *client_name(void)
-{
- return get_peer_name(client_fd,False);
-}
-
-char *client_addr(void)
-{
- return get_peer_addr(client_fd);
-}
-
-char *client_socket_addr(void)
-{
- return get_socket_addr(client_fd);
-}
-
-int client_socket_port(void)
-{
- return get_socket_port(client_fd);
-}
-
-struct in_addr *client_inaddr(struct sockaddr *sa)
-{
- struct sockaddr_in *sockin = (struct sockaddr_in *) (sa);
- socklen_t length = sizeof(*sa);
-
- if (getpeername(client_fd, sa, &length) < 0) {
- DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
- return NULL;
- }
-
- return &sockin->sin_addr;
-}
-
/*******************************************************************
Matchname - determine if host name matches IP address. Used to
confirm a hostname lookup to prevent spoof attacks.