| #include <errno.h> |
| #include <unistd.h> |
| |
| #include <osmocom/core/select.h> |
| |
| #include "client.h" |
| |
| /* This is a remsim-client with an interactive 'shell', where the user |
| * can type in C-APDUs in hex formats, which will be sent to the bankd / |
| * SIM-card. Responses received from SIM Card via bankd will be printed |
| * in return. */ |
| |
| |
| /*********************************************************************** |
| * stdin frontend code to remsim-client |
| ***********************************************************************/ |
| |
| int frontend_request_card_insert(struct bankd_client *bc) |
| { |
| return 0; |
| } |
| |
| int frontend_request_sim_remote(struct bankd_client *bc) |
| { |
| return 0; |
| } |
| |
| int frontend_request_modem_reset(struct bankd_client *bc) |
| { |
| return 0; |
| } |
| |
| int frontend_handle_card2modem(struct bankd_client *bc, const uint8_t *data, size_t len) |
| { |
| OSMO_ASSERT(data); |
| printf("R-APDU: %s\n", osmo_hexdump(data, len)); |
| fflush(stdout); |
| |
| return 0; |
| } |
| |
| int frontend_handle_set_atr(struct bankd_client *bc, const uint8_t *data, size_t len) |
| { |
| OSMO_ASSERT(data); |
| |
| printf("SET_ATR: %s\n", osmo_hexdump(data, len)); |
| fflush(stdout); |
| |
| return 0; |
| } |
| |
| int frontend_handle_slot_status(struct bankd_client *bc, const SlotPhysStatus_t *sts) |
| { |
| return 0; |
| } |
| |
| int frontend_append_script_env(struct bankd_client *bc, char **env, int idx, size_t max_env) |
| { |
| return idx; |
| } |
| |
| |
| /*********************************************************************** |
| * Incoming command from the user application (stdin shell in our case) |
| ***********************************************************************/ |
| |
| struct stdin_state { |
| struct osmo_fd ofd; |
| struct msgb *rx_msg; |
| struct bankd_client *bc; |
| }; |
| |
| /* called every time a command on stdin was received */ |
| static void handle_stdin_command(struct stdin_state *ss, char *cmd) |
| { |
| struct bankd_client *bc = ss->bc; |
| int rc; |
| |
| OSMO_ASSERT(ss->rx_msg); |
| |
| if (!strcasecmp(cmd, "RESET")) { |
| /* reset the [remote] card */ |
| struct frontend_phys_status pstatus = { |
| .flags = { |
| .reset_active = true, |
| .vcc_present = false, |
| .clk_active = false, |
| .card_present = true, |
| }, |
| .voltage_mv = 0, |
| .fi = 0, |
| .di = 0, |
| .wi = 0, |
| .waiting_time = 0, |
| }; |
| osmo_fsm_inst_dispatch(bc->main_fi, MF_E_MDM_STATUS_IND, &pstatus); |
| } else { |
| struct frontend_tpdu ftpdu; |
| uint8_t buf[1024]; |
| |
| /* we assume the user has entered a C-APDU as hex string. parse + send */ |
| rc = osmo_hexparse(cmd, buf, sizeof(buf)); |
| if (rc < 0) { |
| fprintf(stderr, "ERROR parsing C-APDU `%s'!\n", cmd); |
| return; |
| } |
| if (!bc->srv_conn.clslot) { |
| fprintf(stderr, "Cannot send command; no client slot\n"); |
| return; |
| } |
| |
| /* Send CMD APDU to [remote] card */ |
| ftpdu.buf = buf; |
| ftpdu.len = rc; |
| osmo_fsm_inst_dispatch(bc->main_fi, MF_E_MDM_TPDU, &ftpdu); |
| } |
| } |
| |
| /* call-back function for stdin read. Gather bytes in buffer until CR/LF received */ |
| static int stdin_fd_cb(struct osmo_fd *ofd, unsigned int what) |
| { |
| struct stdin_state *ss = ofd->data; |
| char *cur; |
| int rc, i; |
| |
| OSMO_ASSERT(what & OSMO_FD_READ); |
| |
| if (!ss->rx_msg) { |
| ss->rx_msg = msgb_alloc(1024, "stdin"); |
| OSMO_ASSERT(ss->rx_msg); |
| } |
| |
| cur = (char *) ss->rx_msg->tail; |
| rc = read(ofd->fd, cur, msgb_tailroom(ss->rx_msg)); |
| if (rc < 0) |
| return rc; |
| if (rc == 0) { |
| fprintf(stderr, "STDIN was closed, terminating"); |
| exit(0); |
| } |
| msgb_put(ss->rx_msg, rc); |
| |
| for (i = 0; i < rc; i++) { |
| if (cur[i] == '\r' || cur[i] == '\n') { |
| cur[i] = '\0'; |
| /* dispatch the command */ |
| handle_stdin_command(ss, cur); |
| /* FIXME: possibly other commands */ |
| msgb_free(ss->rx_msg); |
| ss->rx_msg = NULL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| |
| |
| /* main function */ |
| int client_user_main(struct bankd_client *bc) |
| { |
| struct stdin_state ss; |
| |
| /* register stdin file descriptor with osmocom select loop abstraction */ |
| memset(&ss, 0, sizeof(ss)); |
| osmo_fd_setup(&ss.ofd, fileno(stdin), OSMO_FD_READ, &stdin_fd_cb, &ss, 0); |
| osmo_fd_register(&ss.ofd); |
| ss.bc = bc; |
| |
| while (1) { |
| osmo_select_main(0); |
| } |
| } |