#include "proxy.h" #include "algo_utils.h" struct dup2_ctx { uint16_t recv_id; uint16_t emit_id; }; void algo_dup2_init(struct evt_core_ctx* ctx, struct algo_ctx* app_ctx, struct algo_params* ap) { app_ctx->misc = malloc(sizeof(struct dup2_ctx)); if (app_ctx->misc == NULL) { perror("malloc failed in algo dup2 init"); exit(EXIT_FAILURE); } memset(app_ctx->misc, 0, sizeof(struct dup2_ctx)); } int algo_dup2_on_stream(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct buffer_packet* bp) { char url[256]; struct evt_core_fdinfo *to_fdinfo = NULL; struct algo_ctx* app_ctx = fdinfo->cat->app_ctx; // Check that we didn't already received the packet struct dup2_ctx* dup2c = app_ctx->misc; if (ring_ge(dup2c->recv_id, bp->ip.ap.content.clear.id)) { mv_buffer_rtof(app_ctx, fdinfo); return 0; } dup2c->recv_id = bp->ip.ap.content.clear.id; // 1. Find destination sprintf(url, "udp:write:127.0.0.1:%d", bp->ip.ap.content.clear.port); to_fdinfo = evt_core_get_from_url (ctx, url); if (to_fdinfo == NULL) { fprintf(stderr, "No fd for URL %s in tcp-read. Dropping packet :( \n", url); mv_buffer_wtof (app_ctx, fdinfo); return 1; } // 2. Move buffer mv_buffer_rtow (app_ctx, fdinfo, to_fdinfo); main_on_udp_write(ctx, to_fdinfo); return 0; } int algo_dup2_on_datagram(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct buffer_packet* bp) { struct evt_core_fdinfo *to_fdinfo = NULL; struct algo_ctx* app_ctx = fdinfo->cat->app_ctx; struct dup2_ctx* dup2c = app_ctx->misc; bp->ip.ap.content.clear.id = dup2c->emit_id; dup2c->emit_id = dup2c->emit_id + 1; struct evt_core_cat* cat = evt_core_get_from_cat (ctx, "tcp-write"); for (int i = 0; i < app_ctx->ap.links; i++) { // 1. A whole packet has been read, we will find someone to write it to_fdinfo = cat->socklist->len > i ? g_array_index(cat->socklist, struct evt_core_fdinfo*, i) : NULL; if (to_fdinfo == NULL) { fprintf(stderr, "No fd for cat %s in udp-read.\n", cat->name); continue; } // 2. We move the buffer and notify the target dup_buffer_tow (app_ctx, bp, to_fdinfo); main_on_tcp_write(ctx, to_fdinfo); } // 3. Release the buffer mv_buffer_rtof (app_ctx, fdinfo); return 0; } int algo_dup2_on_err(struct evt_core_ctx *ctx, struct evt_core_fdinfo *fdinfo) { // We do nothing return 1; }