* In general, we always call like this: ioctl(fd, com, data), * but if there is a pointer in the data and the pointer points to * a memory area, for example, data is struct ifreq, and it uses * ifreq.ifr_ifru.ifru_data, we must copy the memory to msg->buf_addr, * after this, it can be used to communicate with F-Stack process. * Otherwise, an unknown error will occur. * * Two cases: * 1.Nor
| 47 | * |
| 48 | */ |
| 49 | int |
| 50 | ioctl_va(int fd, unsigned long com, void *data, int argc, ...) |
| 51 | { |
| 52 | struct ff_msg *msg, *retmsg = NULL; |
| 53 | unsigned size; |
| 54 | void *cpy_mem; |
| 55 | size_t offset, clen; |
| 56 | int af = AF_INET; |
| 57 | |
| 58 | if (argc != 0 && argc != 3 && argc != 1) { |
| 59 | errno = EINVAL; |
| 60 | return -1; |
| 61 | } |
| 62 | |
| 63 | if (argc == 3) { |
| 64 | va_list ap; |
| 65 | va_start(ap, argc); |
| 66 | offset = va_arg(ap, size_t); |
| 67 | cpy_mem = va_arg(ap, void *); |
| 68 | clen = va_arg(ap, size_t); |
| 69 | va_end(ap); |
| 70 | } else if (argc == 1) { |
| 71 | va_list ap; |
| 72 | va_start(ap, argc); |
| 73 | af = va_arg(ap, int); |
| 74 | va_end(ap); |
| 75 | } |
| 76 | |
| 77 | if (com > 0xffffffff) { |
| 78 | printf("WARNING: ioctl sign-extension ioctl %lx\n", com); |
| 79 | com &= 0xffffffff; |
| 80 | } |
| 81 | |
| 82 | size = IOCPARM_LEN(com); |
| 83 | if ((size > IOCPARM_MAX) || |
| 84 | ((com & (IOC_IN | IOC_OUT)) == 0) || |
| 85 | (size == 0) || |
| 86 | (com & IOC_VOID)) |
| 87 | return (ENOTTY); |
| 88 | |
| 89 | msg = ff_ipc_msg_alloc(); |
| 90 | if (msg == NULL) { |
| 91 | errno = ENOMEM; |
| 92 | return -1; |
| 93 | } |
| 94 | |
| 95 | if (size > msg->buf_len) { |
| 96 | errno = ENOMEM; |
| 97 | ff_ipc_msg_free(msg); |
| 98 | return -1; |
| 99 | } |
| 100 | |
| 101 | #ifdef INET6 |
| 102 | if (af == AF_INET6) { |
| 103 | msg->msg_type = FF_IOCTL6; |
| 104 | } else |
| 105 | #endif |
| 106 | if (af == AF_INET) |
no test coverage detected