1 /* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ 2 3 #define _GNU_SOURCE 4 5 #if HAVE_CONFIG_H 6 #include "config.h" 7 #endif 8 9 #include "libmctp-log.h" 10 #include "libmctp-serial.h" 11 12 #ifdef NDEBUG 13 #undef NDEBUG 14 #endif 15 16 #include <assert.h> 17 #include <fcntl.h> 18 #include <stdbool.h> 19 #include <stdio.h> 20 #include <string.h> 21 #include <unistd.h> 22 23 struct mctp_binding_serial_pipe { 24 int ingress; 25 int egress; 26 27 struct mctp_binding_serial *serial; 28 }; 29 30 static int mctp_binding_serial_pipe_tx(void *data, void *buf, size_t len) 31 { 32 struct mctp_binding_serial_pipe *ctx = data; 33 ssize_t rc; 34 35 rc = write(ctx->egress, buf, len); 36 assert(rc >= 0); 37 assert((size_t)rc == len); 38 39 return rc; 40 } 41 42 uint8_t mctp_msg_src[2 * MCTP_BTU]; 43 44 static bool seen; 45 46 #define __unused __attribute__((unused)) 47 48 static void rx_message(uint8_t eid __unused, void *data __unused, void *msg, 49 size_t len) 50 { 51 uint8_t type; 52 53 type = *(uint8_t *)msg; 54 55 mctp_prdebug("MCTP message received: len %zd, type %d", len, type); 56 57 assert(sizeof(mctp_msg_src) == len); 58 assert(!memcmp(mctp_msg_src, msg, len)); 59 60 seen = true; 61 } 62 63 struct serial_test { 64 struct mctp_binding_serial_pipe binding; 65 struct mctp *mctp; 66 }; 67 68 int main(void) 69 { 70 struct serial_test scenario[2]; 71 72 struct mctp_binding_serial_pipe *a; 73 struct mctp_binding_serial_pipe *b; 74 int p[2][2]; 75 int rc; 76 77 mctp_set_log_stdio(MCTP_LOG_DEBUG); 78 79 memset(&mctp_msg_src[0], 0x5a, MCTP_BTU); 80 memset(&mctp_msg_src[MCTP_BTU], 0xa5, MCTP_BTU); 81 82 rc = pipe(p[0]); 83 assert(!rc); 84 85 rc = pipe(p[1]); 86 assert(!rc); 87 88 /* Instantiate the A side of the serial pipe */ 89 scenario[0].mctp = mctp_init(); 90 assert(scenario[0].mctp); 91 scenario[0].binding.serial = mctp_serial_init(); 92 assert(scenario[0].binding.serial); 93 a = &scenario[0].binding; 94 a->ingress = p[0][0]; 95 a->egress = p[1][1]; 96 mctp_serial_open_fd(a->serial, a->ingress); 97 mctp_serial_set_tx_fn(a->serial, mctp_binding_serial_pipe_tx, a); 98 mctp_register_bus(scenario[0].mctp, mctp_binding_serial_core(a->serial), 8); 99 100 /* Instantiate the B side of the serial pipe */ 101 scenario[1].mctp = mctp_init(); 102 assert(scenario[1].mctp); 103 mctp_set_rx_all(scenario[1].mctp, rx_message, NULL); 104 scenario[1].binding.serial = mctp_serial_init(); 105 assert(scenario[1].binding.serial); 106 b = &scenario[1].binding; 107 b->ingress = p[1][0]; 108 b->egress = p[0][1]; 109 mctp_serial_open_fd(b->serial, b->ingress); 110 mctp_serial_set_tx_fn(b->serial, mctp_binding_serial_pipe_tx, a); 111 mctp_register_bus(scenario[1].mctp, mctp_binding_serial_core(b->serial), 9); 112 113 /* Transmit a message from A to B */ 114 rc = mctp_message_tx(scenario[0].mctp, 9, mctp_msg_src, sizeof(mctp_msg_src)); 115 assert(rc == 0); 116 117 /* Read the message at B from A */ 118 seen = false; 119 mctp_serial_read(b->serial); 120 assert(seen); 121 122 mctp_serial_destroy(scenario[1].binding.serial); 123 mctp_destroy(scenario[1].mctp); 124 mctp_serial_destroy(scenario[0].binding.serial); 125 mctp_destroy(scenario[0].mctp); 126 127 return 0; 128 } 129