| 1 | #define USE_THE_REPOSITORY_VARIABLE |
| 2 | |
| 3 | #include "git-compat-util.h" |
| 4 | #include "config.h" |
| 5 | #include "environment.h" |
| 6 | #include "protocol.h" |
| 7 | #include "trace2.h" |
| 8 | |
| 9 | static enum protocol_version parse_protocol_version(const char *value) |
| 10 | { |
| 11 | if (!strcmp(value, "0")) |
| 12 | return protocol_v0; |
| 13 | else if (!strcmp(value, "1")) |
| 14 | return protocol_v1; |
| 15 | else if (!strcmp(value, "2")) |
| 16 | return protocol_v2; |
| 17 | else |
| 18 | return protocol_unknown_version; |
| 19 | } |
| 20 | |
| 21 | enum protocol_version get_protocol_version_config(void) |
| 22 | { |
| 23 | const char *value; |
| 24 | const char *git_test_k = "GIT_TEST_PROTOCOL_VERSION"; |
| 25 | const char *git_test_v; |
| 26 | |
| 27 | if (!repo_config_get_string_tmp(the_repository, "protocol.version", &value)) { |
| 28 | enum protocol_version version = parse_protocol_version(value); |
| 29 | |
| 30 | if (version == protocol_unknown_version) |
| 31 | die("unknown value for config 'protocol.version': %s", |
| 32 | value); |
| 33 | |
| 34 | return version; |
| 35 | } |
| 36 | |
| 37 | git_test_v = getenv(git_test_k); |
| 38 | if (git_test_v && *git_test_v) { |
| 39 | enum protocol_version env = parse_protocol_version(git_test_v); |
| 40 | |
| 41 | if (env == protocol_unknown_version) |
| 42 | die("unknown value for %s: %s", git_test_k, git_test_v); |
| 43 | return env; |
| 44 | } |
| 45 | |
| 46 | return protocol_v2; |
| 47 | } |
| 48 | |
| 49 | enum protocol_version determine_protocol_version_server(void) |
| 50 | { |
| 51 | const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT); |
| 52 | enum protocol_version version = protocol_v0; |
| 53 | |
| 54 | /* |
| 55 | * Determine which protocol version the client has requested. Since |
| 56 | * multiple 'version' keys can be sent by the client, indicating that |
| 57 | * the client is okay to speak any of them, select the greatest version |
| 58 | * that the client has requested. This is due to the assumption that |
| 59 | * the most recent protocol version will be the most state-of-the-art. |
| 60 | */ |
| 61 | if (git_protocol) { |
| 62 | struct string_list list = STRING_LIST_INIT_DUP; |
| 63 | const struct string_list_item *item; |
| 64 | string_list_split(&list, git_protocol, ":", -1); |
| 65 | |
| 66 | for_each_string_list_item(item, &list) { |
| 67 | const char *value; |
| 68 | enum protocol_version v; |
| 69 | |
| 70 | if (skip_prefix(item->string, "version=", &value)) { |
| 71 | v = parse_protocol_version(value); |
| 72 | if (v > version) |
| 73 | version = v; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | string_list_clear(&list, 0); |
| 78 | } |
| 79 | |
| 80 | trace2_data_intmax("transfer", NULL, "negotiated-version", version); |
| 81 | |
| 82 | return version; |
| 83 | } |
| 84 | |
| 85 | enum protocol_version determine_protocol_version_client(const char *server_response) |
| 86 | { |
| 87 | enum protocol_version version = protocol_v0; |
| 88 | |
| 89 | if (skip_prefix(server_response, "version ", &server_response)) { |
| 90 | version = parse_protocol_version(server_response); |
| 91 | |
| 92 | if (version == protocol_unknown_version) |
| 93 | die("server is speaking an unknown protocol"); |
| 94 | if (version == protocol_v0) |
| 95 | die("protocol error: server explicitly said version 0"); |
| 96 | } |
| 97 | |
| 98 | return version; |
| 99 | } |