353 lines
10 KiB
C
353 lines
10 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <inttypes.h>
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#include <ctype.h>
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#include "libuuid/uuid.h"
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char *baseindir = NULL;
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char *baseoutdir = NULL;
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char *config_file;
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int imhub = 0;
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struct msgarea_t {
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int id;
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int hub;
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char *basedir;
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int *links;
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int link_count;
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};
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struct msg_t {
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int area;
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char from[32];
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char to[32];
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char subject[64];
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uint32_t timedate;
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int oaddr;
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int daddr;
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int type;
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char reply[36];
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} __attribute__ ((packed));
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struct msgarea_t **areas;
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int area_count;
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int mynode = 0;
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int hubnode = 0;
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int copy_file(char *src, char *dest) {
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FILE *src_file;
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FILE *dest_file;
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char c;
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src_file = fopen(src, "rb");
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if (!src_file) {
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return -1;
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}
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dest_file = fopen(dest, "wb");
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if (!dest_file) {
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fclose(src_file);
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return -1;
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}
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while(1) {
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c = fgetc(src_file);
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if (!feof(src_file)) {
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fputc(c, dest_file);
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} else {
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break;
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}
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}
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fclose(src_file);
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fclose(dest_file);
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return 0;
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}
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size_t trimwhitespace(char *out, size_t len, const char *str) {
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if(len == 0)
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return 0;
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const char *end;
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size_t out_size;
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// Trim leading space
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while(isspace((unsigned char)*str)) str++;
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if(*str == 0) {
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*out = 0;
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return 1;
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}
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// Trim trailing space
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end = str + strlen(str) - 1;
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while(end > str && isspace((unsigned char)*end)) end--;
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end++;
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// Set output size to minimum of trimmed string length and buffer size minus 1
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out_size = (end - str) < len-1 ? (end - str) : len-1;
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// Copy trimmed string and add null terminator
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memcpy(out, str, out_size);
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out[out_size] = 0;
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return out_size;
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}
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int parse_config_file(char *filename) {
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FILE *fptr;
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char buffer[256];
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char bufferw[256];
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char *ptr;
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struct msgarea_t *newarea;
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area_count = 0;
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fptr = fopen(filename, "r");
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if (!fptr) {
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return 0;
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}
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fgets(buffer, 256, fptr);
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while (!feof(fptr)) {
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if (buffer[0] != ';') {
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if (buffer[strlen(buffer) - 1] == '\n'){
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buffer[strlen(buffer) - 1] = '\0';
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if (strncasecmp(buffer, "IMHUB", 5) == 0) {
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trimwhitespace(bufferw, 256, &buffer[6]);
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if (strcasecmp(bufferw, "TRUE") == 0) {
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imhub = 1;
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}
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} else if (strncasecmp(buffer, "UPLINK", 6) == 0) {
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trimwhitespace(bufferw, 256, &buffer[7]);
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hubnode = atoi(bufferw);
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} else if (strncasecmp(buffer, "INDIR", 5) == 0) {
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trimwhitespace(bufferw, 256, &buffer[6]);
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baseindir = strdup(bufferw);
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} else if (strncasecmp(buffer, "OUTDIR", 6) == 0) {
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trimwhitespace(bufferw, 256, &buffer[7]);
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baseoutdir = strdup(bufferw);
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} else if (strncasecmp(buffer, "MYNODE", 6) == 0) {
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trimwhitespace(bufferw, 256, &buffer[7]);
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mynode = atoi(bufferw);
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} else if (strncasecmp(buffer, "MSGAREA", 7) == 0) {
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newarea = NULL;
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ptr = strtok(&buffer[8], ",");
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if (ptr != NULL) {
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newarea = (struct msgarea_t *)malloc(sizeof(struct msgarea_t));
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trimwhitespace(bufferw, 256, ptr);
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newarea->id = atoi(bufferw);
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newarea->link_count = 0;
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ptr = strtok(NULL, ",");
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if (ptr != NULL) {
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trimwhitespace(bufferw, 256, ptr);
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newarea->hub = atoi(bufferw);
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ptr = strtok(NULL, ",");
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if (ptr != NULL) {
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trimwhitespace(bufferw, 256, ptr);
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newarea->basedir = strdup(bufferw);
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ptr = strtok(NULL, ",");
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while (ptr != NULL) {
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trimwhitespace(bufferw, 256, ptr);
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if (newarea->link_count == 0) {
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newarea->links = (int *)malloc(sizeof(int));
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} else {
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newarea->links = (int *)realloc(newarea->links, sizeof(int) * (newarea->link_count + 1));
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}
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newarea->links[newarea->link_count] = atoi(bufferw);
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newarea->link_count++;
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ptr = strtok(NULL, ",");
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}
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}
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}
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}
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if (newarea != NULL) {
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if (area_count == 0) {
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areas = (struct msgarea_t **)malloc(sizeof(struct msgarea_t *));
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} else {
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areas = (struct msgarea_t **)realloc(areas, sizeof(struct msgarea_t *) * (area_count + 1));
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}
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areas[area_count] = newarea;
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area_count++;
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}
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}
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} else {
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fclose(fptr);
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return 0;
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}
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}
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fgets(buffer, 256, fptr);
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}
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fclose(fptr);
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return 1;
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}
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void remove_config_file_area(int areaid) {
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char backup[PATH_MAX];
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char buffer[256];
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char bufferc[256];
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char bufferw[256];
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FILE *fptr1;
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FILE *fptr2;
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char *ptr;
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int id;
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int i;
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snprintf(backup, PATH_MAX, "%s.bak", config_file);
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fptr1 = fopen(config_file, "r");
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fptr2 = fopen(backup, "w");
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fgets(buffer, 256, fptr1);
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while (!feof(fptr1)) {
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if (strncasecmp(buffer, "MSGAREA", 7) == 0) {
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strcpy(bufferc, buffer);
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ptr = strtok(&bufferc[8], ",");
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if (ptr != NULL) {
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trimwhitespace(bufferw, 256, ptr);
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id = atoi(bufferw);
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if (id != areaid) {
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fputs(buffer, fptr2);
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}
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}
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} else {
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fputs(buffer, fptr2);
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}
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fgets(buffer, 256, fptr1);
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}
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unlink(config_file);
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rename(backup, config_file);
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}
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int main(int argc, char **argv) {
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char buffer[PATH_MAX];
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struct msg_t msg;
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uuid_t myuuid;
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char msgid[37];
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FILE *fptr;
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struct stat st;
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if (argc != 6) {
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fprintf(stderr, "Usage ./mnetsubunsub [Configfile] [ADD/REMOVE] [AREA#] [HOST#] [JamBase]");
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return -1;
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}
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if (!parse_config_file(argv[1])) {
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fprintf(stderr, "Error parsing config file: %s\n", argv[1]);
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return -1;
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}
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if (baseoutdir == NULL) {
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fprintf(stderr, "OUTDIR must be defined\n");
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return -1;
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}
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if (strcasecmp(argv[2], "ADD") == 0) {
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// send add control message
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memset(&msg, 0, sizeof(struct msg_t));
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msg.area = atoi(argv[3]);
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sprintf(msg.from, "SYSTEM");
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sprintf(msg.to, "SYSTEM");
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sprintf(msg.subject, "ADD Message");
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msg.timedate = time(NULL);
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msg.oaddr = mynode;
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msg.daddr = atoi(argv[4]);
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msg.type = 1;
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if (imhub) {
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snprintf(buffer, PATH_MAX, "%s/%d/", baseoutdir, msg.daddr);
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} else {
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snprintf(buffer, PATH_MAX, "%s/%d/", baseoutdir, hubnode);
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}
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if (stat(buffer, &st) != 0) {
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if (mkdir(buffer, 0755) != 0) {
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fprintf(stderr, "Error making directory %s\n", buffer);
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return -1;
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}
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}
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memset(msgid, 0, 37);
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uuid_generate(myuuid);
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uuid_unparse_lower(myuuid, msgid);
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if (imhub) {
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snprintf(buffer, PATH_MAX, "%s/%d/%d-%s.message", baseoutdir, msg.daddr, msg.daddr, msgid);
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} else {
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snprintf(buffer, PATH_MAX, "%s/%d/%d-%s.message", baseoutdir, hubnode, msg.daddr, msgid);
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}
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fptr = fopen(buffer, "wb");
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if (fptr == NULL) {
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fprintf(stderr, "Error creating file %s\n", buffer);
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return -1;
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}
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fwrite(&msg, sizeof(struct msg_t), 1, fptr);
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fwrite("ADD\r", 4, 1, fptr);
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fclose(fptr);
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// add config line
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fptr = fopen(argv[1], "a");
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fprintf(fptr, "MSGAREA, %d, %d, %s\n", msg.area, msg.daddr, argv[5]);
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fclose(fptr);
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} else if (strcasecmp(argv[2], "REMOVE") == 0) {
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// send remove control message
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memset(&msg, 0, sizeof(struct msg_t));
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msg.area = atoi(argv[3]);
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sprintf(msg.from, "SYSTEM");
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sprintf(msg.to, "SYSTEM");
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sprintf(msg.subject, "REMOVE Message");
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msg.timedate = time(NULL);
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msg.oaddr = mynode;
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msg.daddr = atoi(argv[4]);
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msg.type = 1;
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if (imhub) {
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snprintf(buffer, PATH_MAX, "%s/%d/", baseoutdir, msg.daddr);
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} else {
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snprintf(buffer, PATH_MAX, "%s/%d/", baseoutdir, hubnode);
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}
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if (stat(buffer, &st) != 0) {
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if (mkdir(buffer, 0755) != 0) {
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fprintf(stderr, "Error making directory %s\n", buffer);
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return -1;
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}
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}
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memset(msgid, 0, 37);
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uuid_generate(myuuid);
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uuid_unparse_lower(myuuid, msgid);
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if (imhub) {
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snprintf(buffer, PATH_MAX, "%s/%d/%d-%s.message", baseoutdir, msg.daddr, msg.daddr, msgid);
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} else {
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snprintf(buffer, PATH_MAX, "%s/%d/%d-%s.message", baseoutdir, hubnode, msg.daddr, msgid);
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}
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fptr = fopen(buffer, "wb");
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if (fptr == NULL) {
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fprintf(stderr, "Error creating file %s\n", buffer);
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return -1;
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}
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fwrite(&msg, sizeof(struct msg_t), 1, fptr);
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fwrite("REMOVE\r", 7, 1, fptr);
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fclose(fptr);
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// remove config line
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remove_config_file_area(msg.area);
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}
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return 0;
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} |