getsockname是否也需要在内核通过自定义dev来获取啊？sta
tic int _eXosip_default_gateway_ipv4(char* destination, char* address, int size){ socklen_t len; int sock_rt, on = 1; struct sockaddr_in iface_out; struct sockaddr_in remote; int type; printf("n------ [DEBUG] Start _eXosip_default_gateway_ipv4 ------n"); printf("[DEBUG] Input: destination=%s, address=%p, size=%dn", destination ? destination : "NULL", address, size); // Step 1: 初始化目标地址结构体 memset(&remote, 0, sizeof(struct sockaddr_in)); remote.sin_family = AF_INET; remote.sin_addr.s_addr = inet_addr(destination); remote.sin_port = htons(11111); printf("[DEBUG] Remote address set: family=AF_INET, addr=%s, port=11111n", inet_ntoa(remote.sin_addr)); // Step 2: 创建 UDP 套接字 memset(&iface_out, 0, sizeof(iface_out)); type = SOCK_DGRAM;#if defined(SOCK_CLOEXEC) type = SOCK_CLOEXEC | SOCK_DGRAM;#endif sock_rt = socket(AF_INET, type, 0); printf("[DEBUG] socket() called: AF_INET, type=%d, protocol=0n", type); if (sock_rt == -1) { printf("[ERROR] socket() failed! errno=%d (%s)n", errno, strerror(errno)); snprintf(address, size, "127.0.0.1"); return OSIP_NO_NETWORK; } printf("[DEBUG] socket() returned fd=%dn", sock_rt); // Step 3: 设置 SO_BROADCAST 选项 if (setsockopt(sock_rt, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) == -1) { printf("[ERROR] setsockopt(SO_BROADCAST) failed! errno=%d (%s)n", errno, strerror(errno)); _eXosip_closesocket(sock_rt); snprintf(address, size, "127.0.0.1"); return OSIP_NO_NETWORK; } printf("[DEBUG] setsockopt(SO_BROADCAST) successn"); // Step 4: 连接目标地址（模拟路由选择） printf("[DEBUG] Attempting connect() to %s:11111...n", inet_ntoa(remote.sin_addr)); if (connect(sock_rt, (struct sockaddr*)&remote, sizeof(struct sockaddr_in)) == -1) { printf("[ERROR] connect() failed! errno=%d (%s)n", errno, strerror(errno)); _eXosip_closesocket(sock_rt); snprintf(address, size, "127.0.0.1"); return OSIP_NO_NETWORK; } printf("[DEBUG] connect() success (UDP pseudo-connection established)n"); // Step 5: 获取本地绑定地址（出口 IP） len = sizeof(iface_out); printf("[DEBUG] Calling getsockname()...n"); if (getsockname(sock_rt, (struct sockaddr*)&iface_out, &len) == -1) { printf("[ERROR] getsockname() failed! errno=%d (%s)n", errno, strerror(errno)); _eXosip_closesocket(sock_rt); snprintf(address, size, "127.0.0.1"); return OSIP_NO_NETWORK; } printf("[DEBUG] getsockname() returned: family=%d, addr=%s, port=%dn", iface_out.sin_family, inet_ntoa(iface_out.sin_addr), ntohs(iface_out.sin_port)); // iface_out.sin_addr. // Step 6: 关闭套接字 _eXosip_closesocket(sock_rt); printf("[DEBUG] Socket closed (fd=%d)n", sock_rt); // Step 7: 验证获取的 IP 是否有效 if (iface_out.sin_addr.s_addr == 0) { printf("[WARN] getsockname() returned 0.0.0.0! No valid route to destination?n"); snprintf(address, size, "127.0.0.1"); return OSIP_NO_NETWORK; } // Step 8: 返回结果 printf("[DEBUG] Final local interface IP: %sn", inet_ntoa(iface_out.sin_addr)); osip_strncpy(address, inet_ntoa(iface_out.sin_addr), size - 1); printf("------ [DEBUG] End _eXosip_default_gateway_ipv4 (SUCCESS) ------nn"); return OSIP_SUCCESS;}期待结果和实际结果
软硬件版本信息
错误日志
------ [DEBUG] Start _eXosip_default_gateway_ipv4 ------[DEBUG] Input: destination=217.12.3.11, address=0x100a5cb20, size=128[DEBUG] Remote address set: family=AF_INET, addr=217.12.3.11, port=11111[DEBUG] socket() called: AF_INET, type=524290, protocol=0[DEBUG] socket() returned fd=27[DEBUG] setsockopt(SO_BROADCAST) success[DEBUG] Attempting connect() to 217.12.3.11:11111...[DEBUG] connect() success (UDP pseudo-connection established)[DEBUG] Calling getsockname()...[DEBUG] getsockname() returned: family=2, addr=0.0.0.0, port=49158[DEBUG] Socket closed (fd=113246210)[WARN] getsockname() returned 0.0.0.0! No valid route to destination?[E/sal.skt] not find network interface device by protocol family(16).[E/sal.skt] SAL socket protocol family input failed, return error -3.尝试解决过程
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