Vuln-Scanner-Exploit-Combo/net.h at main · Sewer2K/Vuln-Scanner-Exploit-Combo · GitHub

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#ifndef NET_H
#define NET_H

#include "config.h"

/* ── Network interface helpers ───────────────────────────────── */
int      get_default_iface (char *iface_out);            /* buf >= IF_NAMESIZE */
int      get_ifdetails     (const char *iface,
                             int *ifindex, uint8_t *mac);
int      get_gateway_mac   (uint8_t *mac_out);
uint32_t get_local_ip      (const char *iface);          /* host byte order */

/* ── Packet construction ─────────────────────────────────────── */
uint16_t checksum_ip (struct iphdr  *iph);
uint16_t checksum_tcp(struct tcphdr *tcph,
                       uint32_t src_ip, uint32_t dst_ip);
uint16_t checksum_udp(struct udphdr *udph,
                       uint32_t src_ip, uint32_t dst_ip,
                       size_t payload_len);

void create_syn_packet(packet_t *out,
                        uint32_t src_ip, uint32_t dst_ip,
                        uint16_t src_port, uint16_t dst_port,
                        const uint8_t *src_mac,
                        const uint8_t *dst_mac);

void create_udp_packet(packet_t *out,
                        uint32_t src_ip, uint32_t dst_ip,
                        uint16_t src_port, uint16_t dst_port,
                        const uint8_t *src_mac,
                        const uint8_t *dst_mac,
                        const uint8_t *payload, size_t plen);

/* ── Raw HTTP client ─────────────────────────────────────────── */
/*
 * Connects to ip:port, sends an HTTP/1.0 request, reads response.
 * resp_buf is filled with raw response (headers + body).
 * Returns HTTP status code, 0 on connection error.
 */
int raw_http(const char *ip, uint16_t port,
             const char *method, const char *path,
             const char *extra_headers,  /* "Key: val\r\n..." or NULL */
             const char *body,           /* POST body or NULL         */
             char *resp_buf, size_t resp_sz,
             int timeout_sec);

/* Convenience: extract value of a header from raw response */
int  http_get_header(const char *resp, const char *hdr_name,
                     char *out, size_t out_sz);

/* Returns pointer to body start in resp, or NULL */
const char *http_body(const char *resp);

/* ── String helpers ──────────────────────────────────────────── */
void url_encode   (const char *src, char *dst, size_t dst_sz);
void base64_encode(const uint8_t *src, size_t slen,
                   char *dst, size_t dst_sz);

/* connect() with timeout — returns fd or -1 */
int tcp_connect(const char *ip, uint16_t port, int timeout_sec);

/* xorshift32 PRNG */
uint32_t xorshift32(uint32_t *state);

#endif /* NET_H */