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got some tcp done

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c2ny 2026-01-17 04:01:19 -05:00
parent d71ddf70cc
commit 534e521cb2
3 changed files with 69 additions and 24 deletions
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2
CMakeLists.txt
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@ -61,6 +61,8 @@ target_link_libraries(${PROJECT_NAME} PRIVATE ssl crypto)
target_include_directories(${PROJECT_NAME} PRIVATE "${EXTERN}/openssl/include")
# libevent
set(EVENT__DISABLE_TESTS ON CACHE BOOL "" FORCE)
set(EVENT__DISABLE_REGRESS ON CACHE BOOL "" FORCE)
add_subdirectory("${EXTERN}/libevent")
target_include_directories(${PROJECT_NAME} PRIVATE "${EXTERN}/libevent/include")

BIN
server Executable file
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91
src/main.c
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@ -1,4 +1,5 @@
#include <arpa/inet.h>
#include <asm-generic/socket.h>
#include <errno.h>
#include <netinet/in.h>
#include <openssl/err.h>
@ -14,27 +15,17 @@
#include <unistd.h>
#include "log.h"
void
die(const char *errstr, ...) {
va_list ap;
#define DIE(...) do {\
log_error(__VA_ARGS__); \
exit(1); \
} while(0)
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(1);
}
void
die_ssl(const char *errstr, ...) {
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
ERR_print_errors_fp(stderr);
exit(1);
}
#define DIE_SSL(...) do {\
log_error(__VA_ARGS__); \
ERR_print_errors_fp(stderr); \
exit(1); \
} while(0)
typedef struct {
int fd;
@ -67,7 +58,7 @@ connect_tcp(char *hostname, char *port, int *clientfd) {
hints.ai_flags = AI_PASSIVE;
if ((rv = getaddrinfo(hostname, port, &hints, &res)) != 0) {
die("error getting address info: %s\n", gai_strerror(rv));
DIE("error getting address info: %s\n", gai_strerror(rv));
}
int fd;
@ -93,20 +84,72 @@ connect_tcp(char *hostname, char *port, int *clientfd) {
return err;
}
freeaddrinfo(res);
*clientfd = fd;
return nullptr;
}
// Returns error or nullptr
char*
bind_tcp(char *port) {
bind_tcp(char *port, int *bound_fd) {
int rv;
struct addrinfo hints, *res, *p;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if ((rv = getaddrinfo(NULL, port, &hints, &res)) != 0) {
DIE("error getting address info: %s\n", gai_strerror(rv));
}
int fd;
char ip_str[INET6_ADDRSTRLEN];
for (p = res; p != nullptr; p = p->ai_next) {
if ((fd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
inet_ntop(p->ai_family, get_in_addr(p->ai_addr), ip_str, sizeof(ip_str));
log_warn("Failed to create a socket");
close(fd);
continue;
}
int yes = 1;
if ((setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes))) != 0) {
log_warn("Unable to set SO_REUSEADDR on the socket");
}
if ((rv = bind(fd, p->ai_addr, p->ai_addrlen))) {
inet_ntop(p->ai_family, get_in_addr(p->ai_addr), ip_str, sizeof(ip_str));
log_warn("Failed to bind to %s:%s. %s", ip_str, port, strerror(errno));
continue;
}
inet_ntop(p->ai_family, get_in_addr(p->ai_addr), ip_str, sizeof(ip_str));
log_info("Bound to %s:%s", ip_str, port);
break;
}
if (p == nullptr) {
DIE("Failed to bind");
}
if ((listen(fd, 1)) == -1) {
DIE("listen: %s", strerror(errno));
}
*bound_fd = fd;
return nullptr;
}
int
main() {
return 0;
}