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-rw-r--r--remote_plot_no_gtk.c329
1 files changed, 0 insertions, 329 deletions
diff --git a/remote_plot_no_gtk.c b/remote_plot_no_gtk.c
deleted file mode 100644
index b1cb2a6..0000000
--- a/remote_plot_no_gtk.c
+++ /dev/null
@@ -1,329 +0,0 @@
-// references:
-// https://api.libssh.org/stable/libssh_tutorial.html
-// https://api.libssh.org/stable/libssh_tutor_guided_tour.html
-// plplot example 17
-
-#include <libssh/libssh.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <libssh/sftp.h>
-
-// verify_knownhost()
-#include <errno.h>
-#include <string.h>
-
-#include <fcntl.h> // open()
-
-// plplot
-#include <plplot/plConfig.h>
-#include <plplot/plplot.h>
-#include <math.h>
-//#include <stdlib.h>
-#include <time.h>
-#include <unistd.h>
-
-// very small also works, just transfter delays, I test accelerometer data is
-// like 15782 which is 7 bytes consider newline and \0?
-#define MAX_XFER_BUF_SIZE 7
-
-// Variables for holding error return info from PLplot
-static PLINT pl_errcode;
-static char errmsg[160];
-
-int sftp_read_sync(ssh_session session, sftp_session sftp)
-{
- int access_type;
- sftp_file file;
- char buffer[MAX_XFER_BUF_SIZE];
- int nbytes, rc;
- access_type = O_RDONLY;
-
- PLINT id1, autoy, acc;
- PLFLT ymin, ymax, xlab, ylab;
- PLFLT t, tmin, tmax, tjump;
- PLINT colbox, collab, colline[4], styline[4];
- PLCHAR_VECTOR legline[4];
-
- // If db is used the plot is much more smooth. However, because of the
- // async X behaviour, one does not have a real-time scripcharter.
- // This is now disabled since it does not significantly improve the
- // performance on new machines and makes it difficult to use this
- // example non-interactively since it requires an extra pleop call after
- // each call to plstripa.
- //
- //plsetopt("db", "");
- //plsetopt("np", "");
-
- // User sets up plot completely except for window and data
- // Eventually settings in place when strip chart is created will be
- // remembered so that multiple strip charts can be used simultaneously.
- //
-
- // Specify some reasonable defaults for ymin and ymax
- // The plot will grow automatically if needed (but not shrink)
-
- ymin = -0.1;
- ymax = 0.1;
-
- // Specify initial tmin and tmax -- this determines length of window.
- // Also specify maximum jump in t
- // This can accomodate adaptive timesteps
-
- tmin = 0.;
- tmax = 10.;
- tjump = 0.3; // percentage of plot to jump
-
- // Axes options same as plbox.
- // Only automatic tick generation and label placement allowed
- // Eventually I'll make this fancier
-
- colbox = 1;
- collab = 3;
- styline[0] = colline[0] = 2; // pens color and line style
- styline[1] = colline[1] = 3;
- styline[2] = colline[2] = 4;
- styline[3] = colline[3] = 5;
-
- legline[0] = "in_accel_z_raw"; // pens legend
- legline[1] = "not_used";
- legline[2] = "not_used";
- legline[3] = "not_used";
-
- xlab = 0.; ylab = 0.25; // legend position
-
- autoy = 1; // autoscale y
- acc = 1; // don't scrip, accumulate
-
- // Initialize plplot
-
- plinit();
-
- pladv( 0 );
- plvsta();
-
- // Register our error variables with PLplot
- // From here on, we're handling all errors here
-
- plsError( &pl_errcode, errmsg );
-
- plstripc( &id1, "bcnst", "bcnstv",
- tmin, tmax, tjump, ymin, ymax,
- xlab, ylab,
- autoy, acc,
- colbox, collab,
- colline, styline, legline,
- "t", "", "Strip chart demo" );
-
- if ( pl_errcode )
- {
- fprintf( stderr, "%s\n", errmsg );
- exit( 1 );
- }
-
- // Let plplot handle errors from here on
-
- plsError( NULL, NULL );
-
- autoy = 0; // autoscale y
- acc = 1; // accumulate
-
- // This is to represent a loop over time
- // Let's try a random walk process
-
- for (t=0;;t++) {
- file = sftp_open(sftp, "/sys/bus/iio/devices/iio:device2/in_accel_z_raw",
- access_type, 0);
- if (file == NULL) {
- fprintf(stderr, "Can't open file for reading: %s\n",
- ssh_get_error(session));
- return SSH_ERROR;
- }
-
- for (;;) {
- nbytes = sftp_read(file, buffer, sizeof(buffer));
- if (nbytes == 0) {
- break; // EOF
- } else if (nbytes < 0) {
- fprintf(stderr, "Error while reading file: %s\n",
- ssh_get_error(session));
- sftp_close(file);
- return SSH_ERROR;
- }
-
- //printf("%s",buffer);
- //printf("%d\n",atoi(buffer));
- plstripa( id1, 0, t, atof(buffer));
- }
- }
-
- rc = sftp_close(file);
- if (rc != SSH_OK) {
- fprintf(stderr, "Can't close the read file: %s\n",
- ssh_get_error(session));
- return rc;
- }
-
- plstripd( id1 );
- plend();
-
- return SSH_OK;
-}
-
-// https://api.libssh.org/stable/libssh_tutor_guided_tour.html
-int verify_knownhost(ssh_session session)
-{
- enum ssh_known_hosts_e state;
- unsigned char *hash = NULL;
- ssh_key srv_pubkey = NULL;
- size_t hlen;
- char buf[10];
- char *hexa;
- char *p;
- int cmp;
- int rc;
-
- rc = ssh_get_server_publickey(session, &srv_pubkey);
- if (rc < 0) {
- return -1;
- }
-
- rc = ssh_get_publickey_hash(srv_pubkey,
- SSH_PUBLICKEY_HASH_SHA1,
- &hash,
- &hlen);
- ssh_key_free(srv_pubkey);
- if (rc < 0) {
- return -1;
- }
-
- state = ssh_session_is_known_server(session);
- switch (state) {
- case SSH_KNOWN_HOSTS_OK:
- /* OK */
-
- break;
- case SSH_KNOWN_HOSTS_CHANGED:
- fprintf(stderr, "Host key for server changed: it is now:\n");
- ssh_print_hexa("Public key hash", hash, hlen);
- fprintf(stderr, "For security reasons, connection will be stopped\n");
- ssh_clean_pubkey_hash(&hash);
-
- return -1;
- case SSH_KNOWN_HOSTS_OTHER:
- fprintf(stderr, "The host key for this server was not found but an other"
- "type of key exists.\n");
- fprintf(stderr, "An attacker might change the default server key to"
- "confuse your client into thinking the key does not exist\n");
- ssh_clean_pubkey_hash(&hash);
-
- return -1;
- case SSH_KNOWN_HOSTS_NOT_FOUND:
- fprintf(stderr, "Could not find known host file.\n");
- fprintf(stderr, "If you accept the host key here, the file will be"
- "automatically created.\n");
-
- /* FALL THROUGH to SSH_SERVER_NOT_KNOWN behavior */
-
- case SSH_KNOWN_HOSTS_UNKNOWN:
- hexa = ssh_get_hexa(hash, hlen);
- fprintf(stderr,"The server is unknown. Do you trust the host key?\n");
- fprintf(stderr, "Public key hash: %s\n", hexa);
- ssh_string_free_char(hexa);
- ssh_clean_pubkey_hash(&hash);
- p = fgets(buf, sizeof(buf), stdin);
- if (p == NULL) {
- return -1;
- }
-
- cmp = strncasecmp(buf, "yes", 3);
- if (cmp != 0) {
- return -1;
- }
-
- rc = ssh_session_update_known_hosts(session);
- if (rc < 0) {
- fprintf(stderr, "Error %s\n", strerror(errno));
- return -1;
- }
-
- break;
- case SSH_KNOWN_HOSTS_ERROR:
- fprintf(stderr, "Error %s", ssh_get_error(session));
- ssh_clean_pubkey_hash(&hash);
- return -1;
- }
-
- ssh_clean_pubkey_hash(&hash);
- return 0;
-}
-
-int main(void)
-{
- ssh_session my_ssh_session;
- sftp_session sftp;
- int rc;
-
- // Open session and set options
- my_ssh_session = ssh_new();
- if (my_ssh_session == NULL)
- exit(-1);
- ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, "10.0.0.7");
-
- // Connect to server
- rc = ssh_connect(my_ssh_session);
- if (rc != SSH_OK)
- {
- fprintf(stderr, "Error connecting to 10.0.0.7: %s\n",
- ssh_get_error(my_ssh_session));
- ssh_free(my_ssh_session);
- exit(-1);
- }
-
- // Verify the server's identity
- // For the source code of verify_knownhost(), check previous example
- if (verify_knownhost(my_ssh_session) < 0)
- {
- ssh_disconnect(my_ssh_session);
- ssh_free(my_ssh_session);
- exit(-1);
- }
-
- // Authenticate ourselves
- // https://api.libssh.org/stable/libssh_tutor_authentication.html
- rc = ssh_userauth_publickey_auto(my_ssh_session, NULL, NULL);
- if (rc != SSH_AUTH_SUCCESS)
- {
- fprintf(stderr, "Error authenticating with key: %s\n",
- ssh_get_error(my_ssh_session));
- ssh_disconnect(my_ssh_session);
- ssh_free(my_ssh_session);
- exit(-1);
- }
-
-
- sftp = sftp_new(my_ssh_session);
- if (sftp == NULL)
- {
- fprintf(stderr, "Error allocating SFTP session: %s\n",
- ssh_get_error(my_ssh_session));
- return SSH_ERROR;
- }
-
- rc = sftp_init(sftp);
- if (rc != SSH_OK)
- {
- fprintf(stderr, "Error initializing SFTP session: code %d.\n",
- sftp_get_error(sftp));
- sftp_free(sftp);
- return rc;
- }
-
- sftp_read_sync(my_ssh_session,sftp);
-
- ssh_disconnect(my_ssh_session);
- ssh_free(my_ssh_session);
- // Segmentation fault (core dumped) error, why? maybe double free? so no free is ok?
- //sftp_free(sftp);
-
- return 0;
-}
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