From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/um/drivers/net_user.c | 255 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 255 insertions(+) create mode 100644 arch/um/drivers/net_user.c (limited to 'arch/um/drivers/net_user.c') diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c new file mode 100644 index 00000000000..47229fe4a81 --- /dev/null +++ b/arch/um/drivers/net_user.c @@ -0,0 +1,255 @@ +/* + * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "user.h" +#include "user_util.h" +#include "kern_util.h" +#include "net_user.h" +#include "helper.h" +#include "os.h" + +int tap_open_common(void *dev, char *gate_addr) +{ + int tap_addr[4]; + + 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); + return(-EINVAL); + } + return(0); +} + +void tap_check_ips(char *gate_addr, 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"); + } +} + +void read_output(int fd, char *output, int len) +{ + int remain, n, actual; + char c; + + if(output == NULL){ + output = &c; + len = sizeof(c); + } + + *output = '\0'; + n = os_read_file(fd, &remain, sizeof(remain)); + if(n != sizeof(remain)){ + printk("read_output - read of length failed, err = %d\n", -n); + return; + } + + while(remain != 0){ + n = (remain < len) ? remain : len; + actual = os_read_file(fd, output, n); + if(actual != n){ + printk("read_output - read of data failed, " + "err = %d\n", -actual); + return; + } + remain -= actual; + } + return; +} + +int net_read(int fd, void *buf, int len) +{ + int n; + + n = os_read_file(fd, buf, len); + + if(n == -EAGAIN) + return(0); + else if(n == 0) + return(-ENOTCONN); + return(n); +} + +int net_recvfrom(int fd, void *buf, int len) +{ + int n; + + while(((n = recvfrom(fd, buf, len, 0, NULL, NULL)) < 0) && + (errno == EINTR)) ; + + if(n < 0){ + if(errno == EAGAIN) return(0); + return(-errno); + } + else if(n == 0) return(-ENOTCONN); + return(n); +} + +int net_write(int fd, void *buf, int len) +{ + int n; + + n = os_write_file(fd, buf, len); + + if(n == -EAGAIN) + return(0); + else if(n == 0) + return(-ENOTCONN); + return(n); +} + +int net_send(int fd, void *buf, int len) +{ + int n; + + while(((n = send(fd, buf, len, 0)) < 0) && (errno == EINTR)) ; + if(n < 0){ + if(errno == EAGAIN) return(0); + return(-errno); + } + else if(n == 0) return(-ENOTCONN); + return(n); +} + +int net_sendto(int fd, void *buf, int len, void *to, int sock_len) +{ + int n; + + while(((n = sendto(fd, buf, len, 0, (struct sockaddr *) to, + sock_len)) < 0) && (errno == EINTR)) ; + if(n < 0){ + if(errno == EAGAIN) return(0); + return(-errno); + } + else if(n == 0) return(-ENOTCONN); + return(n); +} + +struct change_pre_exec_data { + int close_me; + int stdout; +}; + +static void change_pre_exec(void *arg) +{ + struct change_pre_exec_data *data = arg; + + os_close_file(data->close_me); + dup2(data->stdout, 1); +} + +static int change_tramp(char **argv, char *output, int output_len) +{ + int pid, fds[2], err; + 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); + return(err); + } + pe_data.close_me = fds[0]; + pe_data.stdout = fds[1]; + pid = run_helper(change_pre_exec, &pe_data, argv, NULL); + + read_output(fds[0], output, output_len); + os_close_file(fds[0]); + os_close_file(fds[1]); + + if (pid > 0) + CATCH_EINTR(err = waitpid(pid, NULL, 0)); + return(pid); +} + +static void change(char *dev, char *what, unsigned char *addr, + unsigned char *netmask) +{ + 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, + 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], + netmask[2], netmask[3]); + + output_len = page_size(); + output = um_kmalloc(output_len); + if(output == NULL) + printk("change : failed to allocate output buffer\n"); + + pid = change_tramp(argv, output, output_len); + if(pid < 0) return; + + if(output != NULL){ + printk("%s", output); + kfree(output); + } +} + +void open_addr(unsigned char *addr, unsigned char *netmask, void *arg) +{ + change(arg, "add", addr, netmask); +} + +void close_addr(unsigned char *addr, unsigned char *netmask, void *arg) +{ + change(arg, "del", addr, netmask); +} + +char *split_if_spec(char *str, ...) +{ + char **arg, *end; + va_list ap; + + va_start(ap, str); + while((arg = va_arg(ap, char **)) != NULL){ + if(*str == '\0') + return(NULL); + end = strchr(str, ','); + if(end != str) + *arg = str; + if(end == NULL) + return(NULL); + *end++ = '\0'; + str = end; + } + va_end(ap); + return(str); +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ -- cgit v1.2.3