1 #include "libpldm/requester/pldm.h" 2 #include "base.h" 3 #include "libpldm/transport.h" 4 5 #include <bits/types/struct_iovec.h> 6 #include <stdbool.h> 7 #include <stdlib.h> 8 #include <string.h> 9 #include <sys/socket.h> 10 #include <sys/un.h> 11 #include <unistd.h> 12 13 /* Temporary for old api */ 14 #include "libpldm/transport/mctp-demux.h" 15 extern int 16 pldm_transport_mctp_demux_get_socket_fd(struct pldm_transport_mctp_demux *ctx); 17 extern struct pldm_transport_mctp_demux * 18 pldm_transport_mctp_demux_init_with_fd(int mctp_fd); 19 20 /* --- old APIS written in terms of the new API -- */ 21 /* 22 * pldm_open returns the file descriptor to the MCTP socket, which needs to 23 * persist over api calls (so a consumer can poll it for incoming messages). 24 * So we need a global variable to store the transport struct 25 */ 26 static struct pldm_transport_mctp_demux *open_transport; 27 28 pldm_requester_rc_t pldm_open(void) 29 { 30 int fd; 31 int rc; 32 33 if (open_transport) { 34 fd = pldm_transport_mctp_demux_get_socket_fd(open_transport); 35 return fd; 36 } 37 38 struct pldm_transport_mctp_demux *demux = NULL; 39 rc = pldm_transport_mctp_demux_init(&demux); 40 if (rc) { 41 return rc; 42 } 43 44 fd = pldm_transport_mctp_demux_get_socket_fd(demux); 45 46 open_transport = demux; 47 48 return fd; 49 } 50 51 /* This macro does the setup and teardown required for the old API to use the 52 * new API. Since the setup/teardown logic is the same for all four send/recv 53 * functions, it makes sense to only define it once. */ 54 #define PLDM_REQ_FN(eid, fd, fn, ...) \ 55 do { \ 56 struct pldm_transport_mctp_demux *demux; \ 57 bool using_open_transport = false; \ 58 pldm_requester_rc_t rc; \ 59 pldm_tid_t tid = 1; \ 60 struct pldm_transport *ctx; \ 61 /* The fd can be for a socket we opened or one the consumer \ 62 * opened. */ \ 63 if (open_transport && \ 64 mctp_fd == pldm_transport_mctp_demux_get_socket_fd( \ 65 open_transport)) { \ 66 using_open_transport = true; \ 67 demux = open_transport; \ 68 } else { \ 69 demux = pldm_transport_mctp_demux_init_with_fd(fd); \ 70 if (!demux) { \ 71 rc = PLDM_REQUESTER_OPEN_FAIL; \ 72 goto transport_out; \ 73 } \ 74 } \ 75 ctx = pldm_transport_mctp_demux_core(demux); \ 76 rc = pldm_transport_mctp_demux_map_tid(demux, tid, eid); \ 77 if (rc) { \ 78 rc = PLDM_REQUESTER_OPEN_FAIL; \ 79 goto transport_out; \ 80 } \ 81 rc = fn(ctx, tid, __VA_ARGS__); \ 82 transport_out: \ 83 if (!using_open_transport) { \ 84 pldm_transport_mctp_demux_destroy(demux); \ 85 } \ 86 return rc; \ 87 } while (0) 88 89 pldm_requester_rc_t pldm_recv_any(mctp_eid_t eid, int mctp_fd, 90 uint8_t **pldm_resp_msg, size_t *resp_msg_len) 91 { 92 PLDM_REQ_FN(eid, mctp_fd, pldm_transport_recv_msg, 93 (void **)pldm_resp_msg, resp_msg_len); 94 } 95 96 pldm_requester_rc_t pldm_recv(mctp_eid_t eid, int mctp_fd, 97 __attribute__((unused)) uint8_t instance_id, 98 uint8_t **pldm_resp_msg, size_t *resp_msg_len) 99 { 100 pldm_requester_rc_t rc = 101 pldm_recv_any(eid, mctp_fd, pldm_resp_msg, resp_msg_len); 102 struct pldm_msg_hdr *hdr = (struct pldm_msg_hdr *)(*pldm_resp_msg); 103 if (hdr->instance_id != instance_id) { 104 free(*pldm_resp_msg); 105 *pldm_resp_msg = NULL; 106 return PLDM_REQUESTER_INSTANCE_ID_MISMATCH; 107 } 108 return rc; 109 } 110 111 pldm_requester_rc_t pldm_send_recv(mctp_eid_t eid, int mctp_fd, 112 const uint8_t *pldm_req_msg, 113 size_t req_msg_len, uint8_t **pldm_resp_msg, 114 size_t *resp_msg_len) 115 { 116 PLDM_REQ_FN(eid, mctp_fd, pldm_transport_send_recv_msg, pldm_req_msg, 117 req_msg_len, (void **)pldm_resp_msg, resp_msg_len); 118 } 119 120 pldm_requester_rc_t pldm_send(mctp_eid_t eid, int mctp_fd, 121 const uint8_t *pldm_req_msg, size_t req_msg_len) 122 { 123 PLDM_REQ_FN(eid, mctp_fd, pldm_transport_send_msg, (void *)pldm_req_msg, 124 req_msg_len); 125 } 126 127 /* Adding this here for completeness in the case we can't smoothly 128 * transition apps over to the new api */ 129 void pldm_close(void) 130 { 131 if (open_transport) { 132 pldm_transport_mctp_demux_destroy(open_transport); 133 } 134 open_transport = NULL; 135 } 136