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131 lines
3.0 KiB
131 lines
3.0 KiB
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <sys/socket.h> |
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#ifndef _NETCON_UTILITIES_CPP |
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#define _NETCON_UTILITIES_CPP |
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namespace ZeroTier |
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{ |
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/* |
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ip_addr_t convert_ip(struct sockaddr_in * addr) |
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{ |
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ip_addr_t conn_addr; |
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struct sockaddr_in *ipv4 = addr; |
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short a = ip4_addr1(&(ipv4->sin_addr)); |
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short b = ip4_addr2(&(ipv4->sin_addr)); |
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short c = ip4_addr3(&(ipv4->sin_addr)); |
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short d = ip4_addr4(&(ipv4->sin_addr)); |
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IP4_ADDR(&conn_addr, a,b,c,d); |
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return conn_addr; |
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} |
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*/ |
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ip_addr_t ip_addr_sin(register struct sockaddr_in *sin) { |
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ip_addr_t ip; |
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*((struct sockaddr_in*) &ip) = *sin; |
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return ip; |
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} |
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// Functions used to pass file descriptors between processes |
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ssize_t sock_fd_write(int sock, int fd) |
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{ |
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ssize_t size; |
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struct msghdr msg; |
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struct iovec iov; |
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char buf = '\0'; |
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int buflen = 1; |
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union |
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{ |
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struct cmsghdr cmsghdr; |
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char control[CMSG_SPACE(sizeof (int))]; |
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} cmsgu; |
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struct cmsghdr *cmsg; |
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iov.iov_base = &buf; |
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iov.iov_len = buflen; |
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msg.msg_name = NULL; |
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msg.msg_namelen = 0; |
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msg.msg_iov = &iov; |
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msg.msg_iovlen = 1; |
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if (fd != -1) { |
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msg.msg_control = cmsgu.control; |
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msg.msg_controllen = sizeof(cmsgu.control); |
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cmsg = CMSG_FIRSTHDR(&msg); |
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cmsg->cmsg_len = CMSG_LEN(sizeof (int)); |
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cmsg->cmsg_level = SOL_SOCKET; |
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cmsg->cmsg_type = SCM_RIGHTS; |
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*((int *) CMSG_DATA(cmsg)) = fd; |
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} else { |
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msg.msg_control = NULL; |
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msg.msg_controllen = 0; |
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} |
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size = sendmsg(sock, &msg, 0); |
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if (size < 0) |
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perror ("sendmsg"); |
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return size; |
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} |
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ssize_t sock_fd_read(int sock, void *buf, ssize_t bufsize, int *fd) |
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{ |
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ssize_t size; |
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if (fd) { |
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struct msghdr msg; |
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struct iovec iov; |
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union |
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{ |
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struct cmsghdr cmsghdr; |
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char control[CMSG_SPACE(sizeof (int))]; |
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} cmsgu; |
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struct cmsghdr *cmsg; |
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iov.iov_base = buf; |
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iov.iov_len = bufsize; |
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msg.msg_name = NULL; |
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msg.msg_namelen = 0; |
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msg.msg_iov = &iov; |
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msg.msg_iovlen = 1; |
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msg.msg_control = cmsgu.control; |
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msg.msg_controllen = sizeof(cmsgu.control); |
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size = recvmsg (sock, &msg, 0); |
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if (size < 0) { |
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perror ("recvmsg"); |
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exit(1); |
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} |
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cmsg = CMSG_FIRSTHDR(&msg); |
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if (cmsg && cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { |
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if (cmsg->cmsg_level != SOL_SOCKET) { |
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fprintf (stderr, "invalid cmsg_level %d\n", |
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cmsg->cmsg_level); |
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exit(1); |
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} |
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if (cmsg->cmsg_type != SCM_RIGHTS) { |
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fprintf (stderr, "invalid cmsg_type %d\n", |
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cmsg->cmsg_type); |
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exit(1); |
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} |
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*fd = *((int *) CMSG_DATA(cmsg)); |
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} else |
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*fd = -1; |
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} else { |
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size = read (sock, buf, bufsize); |
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if (size < 0) { |
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perror("read"); |
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exit(1); |
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} |
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} |
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return size; |
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} |
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} |
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#endif
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