89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
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#include "hosts.h"
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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struct host *conns[1024];
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int num_conns = 0;
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char *glob_name;
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int init_conn(int h_port) {
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int sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
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if (sock_fd < 0) {
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printf("Socket initialization failed.");
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exit(1);
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}
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struct sockaddr_in serv_addr;
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memset(&serv_addr, 0, sizeof(serv_addr));
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_port = htons(h_port);
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serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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if (bind(sock_fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
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printf("Failed to bind socket.\n");
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exit(1);
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}
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return sock_fd;
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}
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void init_hosts(char *file) {
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char *line = NULL;
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size_t len = 0;
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ssize_t read;
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FILE *fp = fopen(file, "r");
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if (fp == NULL) {
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printf("Host file not found.\n");
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exit(1);
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}
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int name = 1;
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while ((read = getline(&line, &len, fp)) != -1) {
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if (name == 1) {
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glob_name = malloc(sizeof(char) * (strlen(line) + 1));
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strcpy(glob_name, line);
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glob_name[strcspn(glob_name, "\n")] = 0;
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printf("Name: %s", glob_name);
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name = 0;
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} else {
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char *cname = malloc(200 * sizeof(char));
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char *addr = malloc(32 * sizeof(char));
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int c_port;
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int h_port;
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int ret = sscanf(line, "%200s %d %32s %d", cname, &h_port, addr, &c_port);
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if (ret != 4) {
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printf("Could not parse host file.\n");
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exit(1);
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}
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struct host *h = malloc(sizeof(struct host));
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h->name = cname;
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h->h_port = h_port;
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h->c_port = c_port;
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h->sockfd = init_conn(h_port);
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struct sockaddr_in conn_addr;
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memset(&conn_addr, 0, sizeof(conn_addr));
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conn_addr.sin_family = AF_INET;
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conn_addr.sin_port = htons(c_port);
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conn_addr.sin_addr.s_addr = inet_addr(addr);
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free(addr);
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h->conn = conn_addr;
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conns[num_conns] = h;
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num_conns += 1;
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}
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}
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}
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