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- #include <stdlib.h>
- #include <unistd.h>
- #include <string.h>
- #include <sys/socket.h>
- #include <sys/types.h>
- #include <sys/uio.h>
- #include <sys/un.h>
- #include <netinet/in.h>
- #include <errno.h>
- #include <android/log.h>
- #define LOG_TAG "hostage: p"
- #define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
- #define LOGW(...) __android_log_print(ANDROID_LOG_WARN,LOG_TAG,__VA_ARGS__)
- #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
- #define CONTROLLEN CMSG_LEN(sizeof(int))
- char *socket_path = "hostage";
- int ipc_sock() {
- int fd;
- struct sockaddr_un addr;
- if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
- LOGE("Unable to create local socket: %d", errno);
- return -1;
- }
- memset(&addr, 0, sizeof(addr));
- addr.sun_family = AF_UNIX;
- strncpy(&addr.sun_path[1], socket_path, strlen(socket_path));
- if (connect(fd, (struct sockaddr*) &addr,
- sizeof(sa_family_t) + strlen(socket_path) + 1) == -1) {
- LOGE("Unable to connect local socket: %d", errno);
- return -1;
- }
- return fd;
- }
- int net_sock(int port) {
- int fd;
- int reuse = 1;
- struct sockaddr_in addr;
- if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
- LOGE("Unable to create net socket: %d", errno);
- return -1;
- }
- memset(&addr, 0, sizeof(addr));
- addr.sin_family = AF_INET;
- addr.sin_addr.s_addr = INADDR_ANY;
- addr.sin_port = htons(port);
- if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) == -1){
- LOGE("Unable to set socketopt: %d", errno);
- return -1;
- }
- if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
- LOGE("Unable to bind net socket: %d", errno);
- return -1;
- }
- if (listen(fd, 5) == -1) {
- LOGE("Unable to listen net socket: %d", errno);
- return -1;
- }
- return fd;
- }
- int send_fd(int fd, int fd_to_send) {
- struct iovec iov[1];
- struct cmsghdr *cmptr;
- struct msghdr msg;
- char buf[2] = "FD";
- iov[0].iov_base = buf;
- iov[0].iov_len = 2;
- cmptr = malloc(CONTROLLEN);
- cmptr->cmsg_level = SOL_SOCKET;
- cmptr->cmsg_type = SCM_RIGHTS;
- cmptr->cmsg_len = CONTROLLEN;
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
- msg.msg_name = NULL;
- msg.msg_namelen = 0;
- msg.msg_control = cmptr;
- msg.msg_controllen = CONTROLLEN;
- *(int *) CMSG_DATA(cmptr) = fd_to_send;
- if (sendmsg(fd, &msg, 0) == -1) {
- LOGE("sendmsg failed: %d", errno);
- }
- return 0;
- }
- int main(int argc, char *argv[]) {
- int port;
- int ipc_fd, net_fd;
- if (argc < 2) {
- exit(EXIT_FAILURE);
- }
- if ((port = atoi(argv[1])) < 1 || (port = atoi(argv[1])) > 65535) {
- exit(EXIT_FAILURE);
- }
- if ((ipc_fd = ipc_sock()) == -1) {
- close(ipc_fd);
- exit(EXIT_FAILURE);
- }
- LOGI("ipc_fd: %d", ipc_fd);
- if ((net_fd = net_sock(port)) == -1) {
- close(ipc_fd);
- close(net_fd);
- exit(EXIT_FAILURE);
- }
- LOGI("net_fd: %d", net_fd);
- int status;
- status = send_fd(ipc_fd, net_fd);
- LOGI("send_fd: %d", status);
- close(ipc_fd);
- close(net_fd);
- if (status == -1) {
- return (EXIT_FAILURE);
- }
- return EXIT_SUCCESS;
- }
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