c语言编写端口查看程序

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

#define MAX_PORT 65535

int main() {
    int sockfd;
    struct sockaddr_in addr;
    char ipstr[INET_ADDRSTRLEN] = "127.0.0.1"; // 可以修改为目标IP地址

    for (int port = 1; port <= MAX_PORT; port++) {
        sockfd = socket(AF_INET, SOCK_STREAM, 0);
        if (sockfd < 0) {
            perror("socket");
            continue;
        }

        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
        addr.sin_port = htons(port);
        inet_pton(AF_INET, ipstr, &addr.sin_addr);

        if (connect(sockfd, (struct sockaddr*)&addr, sizeof(addr)) == 0) {
            printf("Port %d is open\n", port);
        }

        close(sockfd);
    }

    return 0;
}

#include <pthread.h>

void *scan_port(void *arg) {
    int port = *(int*)arg;
    // 端口扫描逻辑...
}

int main() {
    pthread_t threads[MAX_PORT];
    int ports[MAX_PORT];

    for (int i = 0; i < MAX_PORT; i++) {
        ports[i] = i + 1;
        pthread_create(&threads[i], NULL, scan_port, &ports[i]);
    }

    for (int i = 0; i < MAX_PORT; i++) {
        pthread_join(threads[i], NULL);
    }

    return 0;
}