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add some notes and basic code

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This commit is contained in:
Francesco
2024-11-08 20:21:31 +01:00
parent e2bded0456
commit 7f186ff44b
11 changed files with 246 additions and 11 deletions
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17
src/main.c
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@@ -1,6 +1,17 @@
#include "main.h"
#include <stdio.h>
#include "colors.h"
#include "server.h"
#include "utils.h"
int main(void) {
puts(GREEN_COLOR "Running cws..." RESET_COLOR);
int main(int argc, char **argv) {
fprintf(stdout, BOLD GREEN "Running cws...\n" RESET);
int ret = start_server();
if (ret < 0) {
fprintf(stderr, BOLD RED "Unable to start web server\n");
}
print_ips("google.com", "80");
return 0;
}

2
src/meson.build
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@@ -1 +1 @@
sources = files('main.c', 'server.c')
sources = files('main.c', 'server.c', 'utils.c')

29
src/server.c
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@@ -1,5 +1,34 @@
#include "server.h"
#include "colors.h"
int start_server(void) {
char ipv4[INET_ADDRSTRLEN];
struct sockaddr_in sa;
inet_pton(AF_INET, "192.168.0.1", &(sa.sin_addr));
inet_ntop(AF_INET, &(sa.sin_addr), ipv4, INET_ADDRSTRLEN);
fprintf(stdout, BLUE "IPv4: %s\n" RESET, ipv4);
return 0;
}
void get_local_ip(void) {
char service[] = "3030";
struct addrinfo hints;
struct addrinfo *res;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC; // IPv4 or IPv6
hints.ai_socktype = SOCK_STREAM; // TCP
hints.ai_flags = AI_PASSIVE; // fill in IP for me
int status = getaddrinfo(NULL, service, &hints, &res);
if (status != 0) {
fprintf(stderr, RED "getaddrinfo() error: %s\n" RESET,
gai_strerror(status));
exit(1);
}
freeaddrinfo(res);
}

40
src/utils.c Normal file
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@@ -0,0 +1,40 @@
#include "utils.h"
#include "colors.h"
void print_ips(const char *hostname, const char *port) {
struct addrinfo ai;
struct addrinfo *res;
memset(&ai, 0, sizeof ai);
ai.ai_family = AF_UNSPEC;
ai.ai_socktype = SOCK_STREAM;
int status = getaddrinfo(hostname, port, &ai, &res);
if (status < 0) {
fprintf(stderr, RED "getaddrinfo(): %s\n" RESET,
gai_strerror(status));
exit(1);
}
char ipv4[INET_ADDRSTRLEN];
char ipv6[INET6_ADDRSTRLEN];
for (struct addrinfo *p = res; p != NULL; p = p->ai_next) {
if (p->ai_family == AF_INET) {
struct sockaddr_in *sin =
(struct sockaddr_in *)p->ai_addr;
inet_ntop(AF_INET, &sin->sin_addr, ipv4,
INET_ADDRSTRLEN);
fprintf(stdout, BLUE "%s\n" RESET, ipv4);
} else if (p->ai_family == AF_INET6) {
struct sockaddr_in6 *sin6 =
(struct sockaddr_in6 *)p->ai_addr;
inet_ntop(AF_INET6, &sin6->sin6_addr, ipv6,
INET6_ADDRSTRLEN);
fprintf(stdout, BLUE "%s\n" RESET, ipv6);
}
}
freeaddrinfo(res);
}