usbmuxd socket 收发数据c语言完整实现

usbmuxd是一种用于iOS设备和计算机之间通信的协议，它允许计算机通过USB接口与iOS设备进行通信。下面是一个使用C语言实现usbmuxd socket通信的示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

#define UDID_LEN 40
#define USBMUXD_PORT 27015

typedef struct {
    int sock_fd;
    struct sockaddr_in sock_addr;
} usbmuxd_socket_t;

int usbmuxd_socket_open(usbmuxd_socket_t *sock) {
    memset(sock, 0, sizeof(usbmuxd_socket_t));

    sock->sock_fd = socket(AF_INET, SOCK_STREAM, 0);
    if (sock->sock_fd < 0) {
        perror("socket");
        return -1;
    }

    sock->sock_addr.sin_family = AF_INET;
    sock->sock_addr.sin_port = htons(USBMUXD_PORT);
    sock->sock_addr.sin_addr.s_addr = inet_addr("127.0.0.1");

    if (connect(sock->sock_fd, (struct sockaddr *)&sock->sock_addr, sizeof(sock->sock_addr)) < 0) {
        perror("connect");
        close(sock->sock_fd);
        return -1;
    }

    return 0;
}

int usbmuxd_socket_close(usbmuxd_socket_t *sock) {
    if (sock->sock_fd > 0) {
        close(sock->sock_fd);
        sock->sock_fd = -1;
    }

    return 0;
}

int usbmuxd_send_receive(usbmuxd_socket_t *sock, const void *send_buf, size_t send_len, void *recv_buf, size_t recv_len) {
    int flags = fcntl(sock->sock_fd, F_GETFL, 0);
    fcntl(sock->sock_fd, F_SETFL, flags | O_NONBLOCK);

    int ret = send(sock->sock_fd, send_buf, send_len, 0);
    if (ret < 0) {
        perror("send");
        return -1;
    }

    size_t total_recv_len = 0;
    while (total_recv_len < recv_len) {
        ret = recv(sock->sock_fd, recv_buf + total_recv_len, recv_len - total_recv_len, 0);
        if (ret < 0) {
            if (errno == EAGAIN || errno == EWOULDBLOCK) {
                usleep(10000); // sleep for 10ms
                continue;
            } else {
                perror("recv");
                return -1;
            }
        } else if (ret == 0) {
            return -1;
        }
        total_recv_len += ret;
    }

    fcntl(sock->sock_fd, F_SETFL, flags);

    return 0;
}

int usbmuxd_send_attach(usbmuxd_socket_t *sock, const char *udid, int port) {
    uint32_t msg_length = htonl(strlen(udid) + 9);
    uint32_t msg_type = htonl(1);
    uint32_t proto_version = htonl(1);
    uint32_t device_id_length = htonl(strlen(udid));
    uint16_t device_port = htons(port);

    char *send_buf = malloc(sizeof(uint32_t) * 4 + sizeof(uint16_t) + strlen(udid));
    memcpy(send_buf, &msg_length, sizeof(uint32_t));
    memcpy(send_buf + sizeof(uint32_t), &msg_type, sizeof(uint32_t));
    memcpy(send_buf + sizeof(uint32_t) * 2, &proto_version, sizeof(uint32_t));
    memcpy(send_buf + sizeof(uint32_t) * 3, &device_id_length, sizeof(uint32_t));
    memcpy(send_buf + sizeof(uint32_t) * 4, udid, strlen(udid));
    memcpy(send_buf + sizeof(uint32_t) * 4 + strlen(udid), &device_port, sizeof(uint16_t));

    char recv_buf[16];
    int ret = usbmuxd_send_receive(sock, send_buf, sizeof(uint32_t) * 4 + sizeof(uint16_t) + strlen(udid), recv_buf, sizeof(recv_buf));
    if (ret < 0) {
        free(send_buf);
        return -1;
    }

    free(send_buf);

    return 0;
}

int main(int argc, char *argv[]) {
    usbmuxd_socket_t sock;
    char udid[UDID_LEN] = "xxxxxx"; // iOS设备的UDID
    int port = 12345; // 要连接的端口号

    if (usbmuxd_socket_open(&sock) < 0) {
        return -1;
    }

    if (usbmuxd_send_attach(&sock, udid, port) < 0) {
        usbmuxd_socket_close(&sock);
        return -1;
    }

    // 在这里可以使用sock.sock_fd发送和接收数据

    usbmuxd_socket_close(&sock);

    return 0;
}

上面的示例代码包括了打开、关闭usbmuxd socket，发送和接收数据的实现。在实际使用中，可以根据需要修改udid和port的值。