228                       int *should_drop, uint16_t *flip, size_t *flip_offset)  in get_noise()  argument
232     *flip = 0;  in get_noise()
243      * Of noisy datagrams, 25% drop, 25% duplicate, 25% delay, 25% flip bits  in get_noise()
267     /* flip some bits in the header */  in get_noise()
269         /* we flip at most 8 bits of the 16 bit value at once */  in get_noise()
270         *flip = (test_random() % 255 + 1) << (test_random() % 8);  in get_noise()
279 static void flip_bits(unsigned char *msg, size_t msg_len, uint16_t flip,  in flip_bits()  argument
282     if (flip == 0)  in flip_bits()
298     msg[flip_offset] ^= flip >> 8;  in flip_bits()
299     msg[flip_offset + 1] ^= flip & 0xff;  in flip_bits()
366         uint16_t flip = 0;  in noisy_dgram_recvmmsg()  local
394                   &reinject, &should_drop, &flip, &flip_offset);  in noisy_dgram_recvmmsg()
409             flip = 0;  in noisy_dgram_recvmmsg()
413         flip_bits(thismsg->data, thismsg->data_len, flip, flip_offset);  in noisy_dgram_recvmmsg()