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Diffstat (limited to 'arch/um/drivers/net_user.c')
-rw-r--r--arch/um/drivers/net_user.c126
1 files changed, 66 insertions, 60 deletions
diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c
index da946e3e1bf2..90d7f2e8ead8 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -1,34 +1,32 @@
-/*
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include <stddef.h>
-#include <stdarg.h>
-#include <unistd.h>
#include <stdio.h>
+#include <unistd.h>
+#include <stdarg.h>
#include <errno.h>
-#include <stdlib.h>
+#include <stddef.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/wait.h>
-#include <sys/time.h>
-#include "user.h"
-#include "kern_util.h"
#include "net_user.h"
+#include "kern_constants.h"
#include "os.h"
#include "um_malloc.h"
-#include "kern_constants.h"
+#include "user.h"
int tap_open_common(void *dev, char *gate_addr)
{
int tap_addr[4];
- if(gate_addr == NULL)
+ if (gate_addr == NULL)
return 0;
- if(sscanf(gate_addr, "%d.%d.%d.%d", &tap_addr[0],
- &tap_addr[1], &tap_addr[2], &tap_addr[3]) != 4){
- printk("Invalid tap IP address - '%s'\n", gate_addr);
+ if (sscanf(gate_addr, "%d.%d.%d.%d", &tap_addr[0],
+ &tap_addr[1], &tap_addr[2], &tap_addr[3]) != 4) {
+ printk(UM_KERN_ERR "Invalid tap IP address - '%s'\n",
+ gate_addr);
return -EINVAL;
}
return 0;
@@ -38,15 +36,15 @@ void tap_check_ips(char *gate_addr, unsigned char *eth_addr)
{
int tap_addr[4];
- if((gate_addr != NULL) &&
- (sscanf(gate_addr, "%d.%d.%d.%d", &tap_addr[0],
- &tap_addr[1], &tap_addr[2], &tap_addr[3]) == 4) &&
- (eth_addr[0] == tap_addr[0]) &&
- (eth_addr[1] == tap_addr[1]) &&
- (eth_addr[2] == tap_addr[2]) &&
- (eth_addr[3] == tap_addr[3])){
- printk("The tap IP address and the UML eth IP address"
- " must be different\n");
+ if ((gate_addr != NULL) &&
+ (sscanf(gate_addr, "%d.%d.%d.%d", &tap_addr[0],
+ &tap_addr[1], &tap_addr[2], &tap_addr[3]) == 4) &&
+ (eth_addr[0] == tap_addr[0]) &&
+ (eth_addr[1] == tap_addr[1]) &&
+ (eth_addr[2] == tap_addr[2]) &&
+ (eth_addr[3] == tap_addr[3])) {
+ printk(UM_KERN_ERR "The tap IP address and the UML eth IP "
+ "address must be different\n");
}
}
@@ -57,24 +55,28 @@ void read_output(int fd, char *output, int len)
char c;
char *str;
- if(output == NULL){
+ if (output == NULL) {
output = &c;
len = sizeof(c);
}
-
+
*output = '\0';
- ret = os_read_file(fd, &remain, sizeof(remain));
+ ret = read(fd, &remain, sizeof(remain));
if (ret != sizeof(remain)) {
+ if (ret < 0)
+ ret = -errno;
expected = sizeof(remain);
str = "length";
goto err;
}
- while(remain != 0){
+ while (remain != 0) {
expected = (remain < len) ? remain : len;
- ret = os_read_file(fd, output, expected);
+ ret = read(fd, output, expected);
if (ret != expected) {
+ if (ret < 0)
+ ret = -errno;
str = "data";
goto err;
}
@@ -85,20 +87,22 @@ void read_output(int fd, char *output, int len)
err:
if (ret < 0)
- printk("read_output - read of %s failed, errno = %d\n", str, -ret);
+ printk(UM_KERN_ERR "read_output - read of %s failed, "
+ "errno = %d\n", str, -ret);
else
- printk("read_output - read of %s failed, read only %d of %d bytes\n", str, ret, expected);
+ printk(UM_KERN_ERR "read_output - read of %s failed, read only "
+ "%d of %d bytes\n", str, ret, expected);
}
int net_read(int fd, void *buf, int len)
{
int n;
- n = os_read_file(fd, buf, len);
+ n = read(fd, buf, len);
- if(n == -EAGAIN)
+ if ((n < 0) && (errno == EAGAIN))
return 0;
- else if(n == 0)
+ else if (n == 0)
return -ENOTCONN;
return n;
}
@@ -108,12 +112,12 @@ int net_recvfrom(int fd, void *buf, int len)
int n;
CATCH_EINTR(n = recvfrom(fd, buf, len, 0, NULL, NULL));
- if(n < 0){
- if(errno == EAGAIN)
+ if (n < 0) {
+ if (errno == EAGAIN)
return 0;
return -errno;
}
- else if(n == 0)
+ else if (n == 0)
return -ENOTCONN;
return n;
}
@@ -122,11 +126,11 @@ int net_write(int fd, void *buf, int len)
{
int n;
- n = os_write_file(fd, buf, len);
+ n = write(fd, buf, len);
- if(n == -EAGAIN)
+ if ((n < 0) && (errno == EAGAIN))
return 0;
- else if(n == 0)
+ else if (n == 0)
return -ENOTCONN;
return n;
}
@@ -136,12 +140,12 @@ int net_send(int fd, void *buf, int len)
int n;
CATCH_EINTR(n = send(fd, buf, len, 0));
- if(n < 0){
- if(errno == EAGAIN)
+ if (n < 0) {
+ if (errno == EAGAIN)
return 0;
return -errno;
}
- else if(n == 0)
+ else if (n == 0)
return -ENOTCONN;
return n;
}
@@ -152,12 +156,12 @@ int net_sendto(int fd, void *buf, int len, void *to, int sock_len)
CATCH_EINTR(n = sendto(fd, buf, len, 0, (struct sockaddr *) to,
sock_len));
- if(n < 0){
- if(errno == EAGAIN)
+ if (n < 0) {
+ if (errno == EAGAIN)
return 0;
return -errno;
}
- else if(n == 0)
+ else if (n == 0)
return -ENOTCONN;
return n;
}
@@ -171,7 +175,7 @@ static void change_pre_exec(void *arg)
{
struct change_pre_exec_data *data = arg;
- os_close_file(data->close_me);
+ close(data->close_me);
dup2(data->stdout, 1);
}
@@ -181,8 +185,9 @@ static int change_tramp(char **argv, char *output, int output_len)
struct change_pre_exec_data pe_data;
err = os_pipe(fds, 1, 0);
- if(err < 0){
- printk("change_tramp - pipe failed, err = %d\n", -err);
+ if (err < 0) {
+ printk(UM_KERN_ERR "change_tramp - pipe failed, err = %d\n",
+ -err);
return err;
}
pe_data.close_me = fds[0];
@@ -192,8 +197,8 @@ static int change_tramp(char **argv, char *output, int output_len)
if (pid > 0) /* Avoid hang as we won't get data in failure case. */
read_output(fds[0], output, output_len);
- os_close_file(fds[0]);
- os_close_file(fds[1]);
+ close(fds[0]);
+ close(fds[1]);
if (pid > 0)
CATCH_EINTR(err = waitpid(pid, NULL, 0));
@@ -206,25 +211,26 @@ static void change(char *dev, char *what, unsigned char *addr,
char addr_buf[sizeof("255.255.255.255\0")];
char netmask_buf[sizeof("255.255.255.255\0")];
char version[sizeof("nnnnn\0")];
- char *argv[] = { "uml_net", version, what, dev, addr_buf,
+ char *argv[] = { "uml_net", version, what, dev, addr_buf,
netmask_buf, NULL };
char *output;
int output_len, pid;
sprintf(version, "%d", UML_NET_VERSION);
sprintf(addr_buf, "%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]);
- sprintf(netmask_buf, "%d.%d.%d.%d", netmask[0], netmask[1],
+ sprintf(netmask_buf, "%d.%d.%d.%d", netmask[0], netmask[1],
netmask[2], netmask[3]);
output_len = UM_KERN_PAGE_SIZE;
output = kmalloc(output_len, UM_GFP_KERNEL);
- if(output == NULL)
- printk("change : failed to allocate output buffer\n");
+ if (output == NULL)
+ printk(UM_KERN_ERR "change : failed to allocate output "
+ "buffer\n");
pid = change_tramp(argv, output, output_len);
- if(pid < 0) return;
+ if (pid < 0) return;
- if(output != NULL){
+ if (output != NULL) {
printk("%s", output);
kfree(output);
}
@@ -246,13 +252,13 @@ char *split_if_spec(char *str, ...)
va_list ap;
va_start(ap, str);
- while((arg = va_arg(ap, char **)) != NULL){
- if(*str == '\0')
+ while ((arg = va_arg(ap, char **)) != NULL) {
+ if (*str == '\0')
return NULL;
end = strchr(str, ',');
- if(end != str)
+ if (end != str)
*arg = str;
- if(end == NULL)
+ if (end == NULL)
return NULL;
*end++ = '\0';
str = end;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.