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125 lines
2.2 KiB
125 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
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*/ |
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#include <unistd.h> |
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#include <errno.h> |
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#include <string.h> |
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#include <sys/wait.h> |
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#include <net_user.h> |
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#include <os.h> |
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#include "slirp.h" |
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static int slirp_user_init(void *data, void *dev) |
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{ |
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struct slirp_data *pri = data; |
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pri->dev = dev; |
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return 0; |
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} |
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struct slirp_pre_exec_data { |
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int stdin_fd; |
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int stdout_fd; |
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}; |
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static void slirp_pre_exec(void *arg) |
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{ |
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struct slirp_pre_exec_data *data = arg; |
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if (data->stdin_fd != -1) |
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dup2(data->stdin_fd, 0); |
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if (data->stdout_fd != -1) |
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dup2(data->stdout_fd, 1); |
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} |
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static int slirp_tramp(char **argv, int fd) |
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{ |
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struct slirp_pre_exec_data pe_data; |
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int pid; |
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pe_data.stdin_fd = fd; |
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pe_data.stdout_fd = fd; |
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pid = run_helper(slirp_pre_exec, &pe_data, argv); |
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return pid; |
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} |
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static int slirp_open(void *data) |
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{ |
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struct slirp_data *pri = data; |
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int fds[2], pid, err; |
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err = os_pipe(fds, 1, 1); |
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if (err) |
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return err; |
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err = slirp_tramp(pri->argw.argv, fds[1]); |
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if (err < 0) { |
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printk(UM_KERN_ERR "slirp_tramp failed - errno = %d\n", -err); |
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goto out; |
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} |
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pid = err; |
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pri->slave = fds[1]; |
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pri->slip.pos = 0; |
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pri->slip.esc = 0; |
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pri->pid = err; |
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return fds[0]; |
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out: |
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close(fds[0]); |
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close(fds[1]); |
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return err; |
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} |
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static void slirp_close(int fd, void *data) |
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{ |
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struct slirp_data *pri = data; |
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int err; |
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close(fd); |
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close(pri->slave); |
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pri->slave = -1; |
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if (pri->pid<1) { |
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printk(UM_KERN_ERR "slirp_close: no child process to shut " |
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"down\n"); |
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return; |
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} |
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#if 0 |
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if (kill(pri->pid, SIGHUP)<0) { |
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printk(UM_KERN_ERR "slirp_close: sending hangup to %d failed " |
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"(%d)\n", pri->pid, errno); |
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} |
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#endif |
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err = helper_wait(pri->pid); |
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if (err < 0) |
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return; |
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pri->pid = -1; |
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} |
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int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri) |
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{ |
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return slip_proto_read(fd, buf, len, &pri->slip); |
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} |
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int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri) |
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{ |
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return slip_proto_write(fd, buf, len, &pri->slip); |
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} |
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const struct net_user_info slirp_user_info = { |
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.init = slirp_user_init, |
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.open = slirp_open, |
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.close = slirp_close, |
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.remove = NULL, |
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.add_address = NULL, |
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.delete_address = NULL, |
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.mtu = BUF_SIZE, |
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.max_packet = BUF_SIZE, |
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};
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