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 == len); 37 38 return rc; 39 } 40 41 uint8_t mctp_msg_src[2 * MCTP_BTU]; 42 43 static bool seen; 44 45 static void rx_message(uint8_t eid, void *data, void *msg, size_t len) 46 { 47 uint8_t type; 48 49 type = *(uint8_t *)msg; 50 51 mctp_prdebug("MCTP message received: len %zd, type %d", len, type); 52 53 assert(sizeof(mctp_msg_src) == len); 54 assert(!memcmp(mctp_msg_src, msg, len)); 55 56 seen = true; 57 } 58 59 struct serial_test { 60 struct mctp_binding_serial_pipe binding; 61 struct mctp *mctp; 62 }; 63 64 int main(void) 65 { 66 struct serial_test scenario[2]; 67 68 struct mctp_binding_serial_pipe *a; 69 struct mctp_binding_serial_pipe *b; 70 int p[2][2]; 71 int rc; 72 73 mctp_set_log_stdio(MCTP_LOG_DEBUG); 74 75 memset(&mctp_msg_src[0], 0x5a, MCTP_BTU); 76 memset(&mctp_msg_src[MCTP_BTU], 0xa5, MCTP_BTU); 77 78 rc = pipe(p[0]); 79 assert(!rc); 80 81 rc = pipe(p[1]); 82 assert(!rc); 83 84 /* Instantiate the A side of the serial pipe */ 85 scenario[0].mctp = mctp_init(); 86 assert(scenario[0].mctp); 87 scenario[0].binding.serial = mctp_serial_init(); 88 assert(scenario[0].binding.serial); 89 a = &scenario[0].binding; 90 a->ingress = p[0][0]; 91 a->egress = p[1][1]; 92 mctp_serial_open_fd(a->serial, a->ingress); 93 mctp_serial_set_tx_fn(a->serial, mctp_binding_serial_pipe_tx, a); 94 mctp_register_bus(scenario[0].mctp, mctp_binding_serial_core(a->serial), 8); 95 96 /* Instantiate the B side of the serial pipe */ 97 scenario[1].mctp = mctp_init(); 98 assert(scenario[1].mctp); 99 mctp_set_rx_all(scenario[1].mctp, rx_message, NULL); 100 scenario[1].binding.serial = mctp_serial_init(); 101 assert(scenario[1].binding.serial); 102 b = &scenario[1].binding; 103 b->ingress = p[1][0]; 104 b->egress = p[0][1]; 105 mctp_serial_open_fd(b->serial, b->ingress); 106 mctp_serial_set_tx_fn(b->serial, mctp_binding_serial_pipe_tx, a); 107 mctp_register_bus(scenario[1].mctp, mctp_binding_serial_core(b->serial), 9); 108 109 /* Transmit a message from A to B */ 110 rc = mctp_message_tx(scenario[0].mctp, 9, mctp_msg_src, sizeof(mctp_msg_src)); 111 assert(rc == 0); 112 113 /* Read the message at B from A */ 114 seen = false; 115 mctp_serial_read(b->serial); 116 assert(seen); 117 118 mctp_serial_destroy(scenario[1].binding.serial); 119 mctp_destroy(scenario[1].mctp); 120 mctp_serial_destroy(scenario[0].binding.serial); 121 mctp_destroy(scenario[0].mctp); 122 123 return 0; 124 } 125